Categories:

Collection of Ray Peat Quote Blogs by FPS

Also see:
Collection of FPS Charts
Master List – Ray Peat, PhD Interviews

Ray Peat, PhD: Quotes Relating to Exercise

Ray Peat, PhD and Concentric Exercise

Ray Peat, PhD Quotes on Coconut Oil

Ray Peat, PhD Quotes on Therapeutic Effects of Niacinamide

Ray Peat, PhD on Carbon Dioxide, Longevity, and Regeneration

Ray Peat, PhD on Low Blood Sugar & Stress Reaction

Ray Peat, PhD on Thyroid, Temperature, Pulse, and TSH

Ray Peat, PhD on the Benefits of the Raw Carrot

Ray Peat, PhD on Aspirin

Ray Peat PhD on the Menstrual Cycle

Ray Peat, PhD on High Blood Pressure

Ray Peat, PhD on Endotoxin

Ray Peat, PhD on Brewer’s Yeast

Ray Peat, PhD on Nitric Oxide

Ray Peat, PhD – Concerns with Starches

Universal Principle of Cellular Energy

Protect the Mitochondria

Posted in General.

Tagged with , , , , , , , , , , , , , , , , , , .


Serotonin Activates Glycolysis

Also see:
Tryptophan Metabolism: Effects of Progesterone, Estrogen, and PUFA
Estrogen Increases Serotonin
Hypothyroidism and Serotonin
Omega -3 “Deficiency” Decreases Serotonin Producing Enzyme
Enzyme to Know: Tryptophan Hydroxylase
Tryptophan, Sleep, and Depression
Carbohydrate Lowers Free Tryptophan
Gelatin > Whey
Serotonin, Fatigue, Training, and Performance
Gelatin, Glycine, and Metabolism
Whey, Tryptophan, & Serotonin
Serotonin and Melatonin Lower Progesterone
Role of Serotonin in Preeclampsia
Maternal Ingestion of Tryptophan and Cancer in Female Offspring
Melatonin Lowers Body Temperature

Serotonin activates glycolysis, forming lactic acid. Excess lactic acid tends to decrease efficient energy production by interfering with mitochondrial respiration. -Ray Peat, PhD

Mol Genet Metab. 1998 Mar;63(3):235-8.
Activation of membrane skeleton-bound phosphofructokinase in erythrocytes induced by serotonin.
Assouline-Cohen M, Ben-Porat H, Beitner R.
We show here that serotonin, both in vivo and in vitro, induced a marked activation of phosphofructokinase, the rate-limiting enzyme in glycolysis, in the membrane-skeleton fraction from erythrocytes. Concomitantly, the hormone induced a striking increase in lactate content, reflecting stimulation of glycolysis. The enzyme’s activity in the cytosolic (soluble) fraction remained unchanged. These results suggest a defense mechanism in the erythrocytes against the damaging effects of serotonin, whose concentration in plasma increases in many diseases and is implicated as playing an important role in circulation disturbances.

Mol Genet Metab. 2007 Dec;92(4):364-70. Epub 2007 Aug 27.
Serotonin stimulates mouse skeletal muscle 6-phosphofructo-1-kinase through tyrosine-phosphorylation of the enzyme altering its intracellular localization.
Coelho WS, Costa KC, Sola-Penna M.
Serotonin (5-HT) is a hormone implicated in the regulation of many physiological and pathological events. One of its most intriguing properties is the ability to up-regulate mitosis. Moreover, it has been shown that 5-HT stimulate glucose uptake on skeletal muscle, suggesting that 5-HT may regulate glucose metabolism of peripheric tissues. Here we demonstrate that 5-HT stimulates skeletal muscle 6-phosphofructo-1-kinase (PFK) activity in a dose-response manner, through 5-HT(2A) receptor subtype. Maximal activation of the enzyme (2.5-fold compared to control) is achieved in the presence of 25pM 5-HT, increasing both PFK maximal velocity and affinity for the substrate fructose-6-phosphate. These effects occur due to tyrosine phosphorylation of the enzyme that is 2-fold enhanced upon 5-HT stimulation of skeletal muscles preparation. Once 5-HT-induced tyrosine phosphorylation of PFK is prevented by genistein, a tyrosine kinase inhibitor, the hormone stimulatory effect on PFK is abrogated. Wortmannin, a phosphatidylinositol-3-kinase (PI3K) inhibitor, does not interfere on 5-HT-induced stimulation of PFK, supporting that the observed effects are independent on insulin signaling pathway. Furthermore, 5-HT promotes the association of PFK to the muscle f-actin, suggesting that the hormone alters PFK intracellular distribution, favoring its association to the cytoskeleton. Altogether, our results support evidences that 5-HT augments skeletal muscle glucose consumption through stimulation of glycolysis key regulatory enzyme, PFK, throughout tyrosine phosphorylation and intracellular redistribution of the enzyme.

Gen Pharmacol. 1994 Oct;25(6):1257-62.
Serotonin-induced decrease in brain ATP, stimulation of brain anaerobic glycolysis and elevation of plasma hemoglobin; the protective action of calmodulin antagonists.
Koren-Schwartzer N, Chen-Zion M, Ben-Porat H, Beitner R.
1. Injection of serotonin (5-hydroxytryptamine) to rats, induced a dramatic fall in brain ATP level, accompanied by an increase in P(i). Concomitant to these changes, the activity of cytosolic phosphofructokinase, the rate-limiting enzyme of glycolysis, was significantly enhanced. Stimulation of anaerobic glycolysis was also reflected by a marked increase in lactate content in brain. 2. Brain glucose 1,6-bisphosphate level was decreased, whereas fructose 2,6-bisphosphate was unaffected by serotonin. 3. All these serotonin-induced changes in brain, which are characteristic for cerebral ischemia, were prevented by treatment with the calmodulin (CaM) antagonists, trifluoperazine or thioridazine. 4. Injection of serotonin also induced a marked elevation of plasma hemoglobin, reflecting lysed erythrocytes, which was also prevented by treatment with the CaM antagonists. 5. The present results suggest that CaM antagonists may be effective drugs in treatment of many pathological conditions and diseases in which plasma serotonin levels are known to increase.

Posted in General.

Tagged with , , , , , , , .


Tryptophan Metabolism: Effects of Progesterone, Estrogen, and PUFA

Also see:
Estrogen Increases Serotonin
Hypothyroidism and Serotonin
Omega -3 “Deficiency” Decreases Serotonin Producing Enzyme
Enzyme to Know: Tryptophan Hydroxylase
Tryptophan, Sleep, and Depression
Carbohydrate Lowers Free Tryptophan
Gelatin > Whey
Serotonin, Fatigue, Training, and Performance
Gelatin, Glycine, and Metabolism
Whey, Tryptophan, & Serotonin
Serotonin and Melatonin Lower Progesterone
Role of Serotonin in Preeclampsia
Maternal Ingestion of Tryptophan and Cancer in Female Offspring
Melatonin Lowers Body Temperature

Pellagra occurs about twice as often in women as in men, and this is because estrogen activates an enzyme that alters metabolism of tryptophan, blocking the formation of niacin. The alternative products include the excitotoxin, quinolinic acid, and some carcinogens.

Progesterone inhibits the activity of that enzyme. Progesterone also lowers brain serotonin (Izquierdo, et al., 1978), decreases the excitatory carcinogens (Moursi, et al., 1970) and increases the formation of niacin (Shibata, et al., 2003) The polyunsaturated fats, DHA, EPA, and linoleic acid activate the conversion of tryptophan to quinolinic acid (Egashira, et al., 2003, 2007), and inhibit the formation of niacin (Egashira, et al., 1995). -Ray Peat, PhD

Pharmacol Res Commun. 1978 Jul;10(7):643-56.
Role of ACTH on the effect of medroxyprogesterone in brain stem serotonin.
Izquierdo JA, Savini C, Borghi E, Rabiller G, Costas S, Justel E.
A clinical study with 361 female rats was conducted to elucidate the mechanism whereby MPA (medroxyprogesterone acetate) lowers 5-HT/5-HIAA ratio in the brain area and the possible role of serotoniergic mechanisms. In addition, the participation of MAO (monoamino oxidase) system and the effects of some steroids were studied in order to establish a relationship between chemical structure and activity. The effects of the following steroids were studied: MPA (medroxyprogesterone acetate), melengestrol acetate, chlormadinone, pregnenolone, -methyl pregnenolone, DOCA, acetoxi-progesterone, and ACTH (synacthen). Effects of these substances on LTP (liver tryptophan pyrrolase) activity, total and free plasma and brain stem Trp (tryptophan), and the 5HT and 5HTAA content in brain stem are tabulated. Of all the substances, only MPA and melengestrol acetate significantly raised LTP activity and both also lowered 5-HT content of brain stem. The high levels of ACTH in the blood of the adrenalectomized rats, as in those under fasting conditions, antagonized MPA effects. To further test this seeming result, ACTH and ACTH-MPA were injected into another group of animals. The ACTH not only increased plasma corticosterone but also antagonized the effect of MPA on the 5-HT content of brain stem. The study did not identify a relationship between chemical structure of the steroids studied and effects observed.

Biosci Biotechnol Biochem. 1997 Jul;61(7):1200-2.
Effects of sex hormones on the metabolism of tryptophan to niacin and to serotonin in male rats.
Shibata K, Toda S.
It is known that deaths attributable to pellagra, which is considered to be a disease caused by the disturbance of tryptophan metabolism, have been approximately two-fold higher in women than in men. We investigated the effects of the administration of female and male sex hormones on the contents of tryptophan and such metabolites as serotonin, nicotinamide, N1-methylnicotinamide, N1-methyl-2-pyridone-5-carboxamide, and N1-methyl-4-pyridone-3-carboxamide, and on the conversion ratio of tryptophan to niacin in male rats. Feeding a diet containing estrone or testosterone had no effect on the concentrations of tryptophan and serotonin in the blood and brain, or on the concentration of 5-hydroxyindole-3-acetic acid in the brain. On the contrary, feeding a diet containing estrone caused to a decrease in the urinary excretion of nicotinamide, N1-methylnicotinamide, N1-methyl-2-pyridone-5-carboxamide, and N1-methyl-4-pyridone-3-carboxamide, and of the conversion ratio of tryptophan to niacin when compared with the control rats. Feeding a diet containing testosterone had no effect on any parameter. We postulate from these findings that the cause of higher pellagra deaths in women than in men is attributable to the decrease in the formation of niacin from tryptophan, but not in the formation of serotonin by the female hormone. It seems likely that female sex hormones inhibit the synthesis of niacin from tryptophan, and that women, especially during pregnancy, will be more at risk to pellagra than are men.

Bull World Health Organ. 1970;43(5):651-61.
The influence of sex, age, synthetic oestrogens, progestogens and oral contraceptives on the excretion of urinary tryptophan metabolites.
Moursi GE, Abdel-Daim MH, Kelada NL, Abdel-Tawab GA, Girgis LH.
The excretion of urinary tryptophan metabolites was studied in normal and postmenopausal women and in women taking norethindrone and ethinyl estradiol, singly and in combination. The results showed that the altered tryptophan metabolism found in the preovulatory phase of the cycle and in postmenopausal women was the result of an interaction between Vitamin-B6 and endogenous sex hormones. During the preovulatory phase, endogenous estradiol disrupted the normal activity of the Vitamin-B6-dependent quinolinic acid decarboxylase, which resulted in the accumulation of bladder carcinogens in urine. During the postovulatory phase, endogenous progesterone and the production of metabolites antagonized this effect. Administration of naturally occurring progesterone and of ethinyl estradiol, alone and in combination with norethindrone, was able to counter the interaction between Vitamin-B6 and endogenous estradiol. It is suggested that the cyclic excretion pattern of endogenous bladder carcinogens in young, nonpregnant women may contribute, in part, to the low incidence of bladder cancer in women.

Br J Nutr. 1984 Mar;51(2):219-24.
Inhibition of tryptophan metabolism by oestrogens in the rat: a factor in the aetiology of pellagra.
Bender DA, Totoe L.
The effect of the administration of oestrone sulphate on tryptophan metabolism has been assessed in rats in order to determine whether and to what extent inhibition of tryptophan metabolism by oestrogens may be a factor in the aetiology of pellagra, and might explain the reported twofold excess of females over males in many outbreaks of pellagra. Feeding ovariectomized rats for 1 week on a diet containing 15 mg oestrone sulphate/kg led to significant inhibition of kynurenine hydroxylase (EC 1.14.13.9), kynureninase (EC 3.7.1.3) and 3-hydroxyanthranilate oxidase (EC 1.13.11.6). There was also a significant increase in plasma tryptophan, suggesting decreased activity of tryptophan oxygenase (EC 1.13.11.11). This inhibition of tryptophan metabolism will result in a considerable reduction in the synthesis of the nicotinamide nucleotide coenzymes (NAD and NADP) from tryptophan. When ovariectomized rats were maintained for 4 weeks on a diet providing no preformed niacin and only a marginally adequate amount of tryptophan (1030 mg/kg), the addition of sulphate to the diet led to a significant reduction in the liver content of nicotinamide nucleotides and the urinary excretion of the end-product of NAD metabolism, N1-methyl nicotinamide. It is suggested that when the diet is only marginally adequate in tryptophan and niacin, inhibition of tryptophan metabolism by endogenous or administered oestrogens may be an additional factor in the development of pellagra.

Br J Nutr. 1982 May;47(3):609-14.
Effects of oestrogen administration on vitamin B6 and tryptophan metabolism in the rat.
Bender DA, Tagoe CE, Vale JA.
1. In order to assess the effects of oestrogens on the metabolism of tryptophan and vitamin B6, ovariectomized rats have been maintained on diets providing known amounts of tryptophan, nicotinamide and vitamin B6. They received oestrone sulphate, 210 micrograms/kg body-wt per d, either incorporated in the diet for 8 weeks, or by daily intraperitoneal injection for periods of 1-3 d. 2. Oestrone sulphate administration caused a slight reduction in the concentration of pyridoxal phosphate in plasma. It had no effect on the concentration of pyridoxal phosphate in liver or kidney, the urinary excretion of 4-pyridoxic acid, the activation of erythrocyte aspartate aminotransferase (L-aspartate:2-oxo-glutarate aminotransferase, EC 2. 6. 1. 1) by incubation with added pyridoxal phosphate, or the activity of pyridoxal oxidase (aldehyde:oxygen oxido-reductase, EC 1.2.3.1) in the liver. 3. Oestrone sulphate administration caused an increase in the urinary excretion of kynurenine and a reduction in the activity of liver kynureninase (L-kynurenine hydrolase, EC 3.7.1.3). It had no effect on the urinary excretion of N1-methyl nicotinamide or the concentrations of nicotinamide nucleotides in blood, liver or kidney. 4. There was a considerable excess of the apoenzyme of kynureninase in the liver. Incubation of liver homogenates with added pyridoxal phosphate led to a 4- to 5-fold increase in activity. 5. We conclude that there is no evidence of any significant effect of oestrogens on vitamin B6. It is suggested that abnormalities of tryptophan metabolism in women receiving oestrogens, which have been widely attributed to drug-induced vitamin B6 depletion, can be accounted for by inhibition of kynureninase by oestrogen metabolites.

Adv Exp Med Biol. 2003;527:435-41.
Increase in conversion of tryptophan to niacin in pregnant rats.
Shibata K, Fukuwatari T, Murakami M, Sasaki R.
There is the report that the deaths by pellagra in women is approximately twofold excess that in men. In the present experiment, in order to clarify a factor in the etiology of pellagra in female and to get basic information how much niacin should be supplemented in pregnant state, we investigated the effects of pregnant on the metabolism of tryptophan to niacin in rats. The daily urine samples were collected from day -17 and day +6 (the delivery day was designated as day 0) and the intermediates of tryptophan to niacin were measured. The metabolites such as kynurenic acid, xanthurenic acid, anthranilic acid, 3-hydroxyanthranilic acid, quinolinic acid, N1-methylnicotinamide, N1-methyl-2-pyridone-5-carboxamide, N1-methyl-4-pyridone-3-carboxamide were increased with progress in pregnant and returned to normal levels after the delivery. The catabolism of tryptophan is accelerated during pregnancy, indicataing that pregnancy would not be an etiology of pellagra and no niacin supplement needs but tryptohan supplement would need.

Biochim Biophys Acta. 2004 Nov 8;1686(1-2):118-24.
Differential effects of dietary fatty acids on rat liver alpha-amino-beta-carboxymuconate-epsilon-semialdehyde decarboxylase activity and gene expression.
Egashira Y, Murotani G, Tanabe A, Saito K, Uehara K, Morise A, Sato M, Sanada H.
Hepatic alpha-amino-beta-carboxymuconate-epsilon-semialdehyde decarboxylase (ACMSD; formerly termed picolinic carboxylase) [EC4.1.1.45] plays a key role in regulating NAD biosynthesis and the generation of quinolinate (quinolinic acid) from tryptophan. Quinolinate is a potent endogenous excitotoxin of neuronal cells. We previously reported that ingestion of fatty acids by rats leads to a decrease in their hepatic ACMSD activity. However, the mechanism of this phenomenon is not clarified. We previously purified ACMSD and cloned cDNA encoding rat ACMSD. Therefore, in this study, we examined the differential effect of fatty acids on ACMSD mRNA expression by Northern blot. Moreover, we measured quinolinic acid concentration in rats fed on fatty acid. When diets containing 2% level of fatty acid were given to male Sprague-Dawley rats (4 weeks old) for 8 days, long-chain saturated fatty acids and oleic acid did not affect ACMSD mRNA expression in the liver. Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) strongly suppressed the liver ACMSD mRNA expression. In rats fed with high linoleic acid diet for 8 days, serum quinolinic acid was significantly increased as compared with the rats fed on a fatty acid-free diet under the condition of the approximately same calorie ingestion. These results suggest that the transcription level of ACMSD is modulated by polyunsaturated fatty acids, and suppressive potency of ACMSD mRNA is n-3 fatty acid family>linoleic acid (n-6 fatty acid)>saturated fatty acid. Moreover, this study provides the information that a high polyunsaturated fatty acid diet affects the production of quinolinic acid in serum by suppressing the ACMSD activity.

Int J Vitam Nutr Res. 2007 Mar;77(2):142-8.
Dietary protein level and dietary interaction affect quinolinic acid concentration in rats.
Egashira Y, Sato M, Saito K, Sanada H.
During tryptophan-niacin conversion, hepatic alpha-amino-beta-carboxymuconate-epsilon-semialdehyde decarboxylase (ACMSD) [EC4.1.1.45] plays a key role in regulating NAD biosynthesis. ACMSD activity is greatly affected by many factors such as nutritional status and disease. The tryptophan catabolite quinolinic acid has been reported to be associated with the pathogenesis of various disorders and is a potential endogenous toxin. However the effects of dietary protein levels or dietary interaction between protein levels and fatty acid type to this process have not been investigated and are still unknown. In this study, we examined whether dietary protein level, fatty acid type, namely saturated fatty acid and polyunsaturated fatty acid, and their interaction affect serum quinolinic acid concentration in rats. Male Sprague-Dawley rats (4-weeks old) were fed with 20% casein + 10% stearic acid diet (20C10S), 20% casein + 10% linoleic acid diet (20C10L), 40% casein + 10% stearic acid diet (40C10S), or 40% casein + 10% linoleic acid diet (40C10L) for 8 days, and serum quinolinic acid concentration and ACMSD activity were determined. Serum quinolinic acid concentration was significantly increased in the 40C10L group compared with other three groups. There was also the negative correlation between the sum of liver and kidney ACMSD activities, and serum quinolinic acid concentration per tryptophan intake (r = 0.8209, p < 0.01). Increased serum QA concentrations are probably due to a decreased ACMSD activity.

Comp Biochem Physiol A Physiol. 1995 Aug;111(4):539-45.
Effect of dietary linoleic acid on the tryptophan-niacin metabolism in streptozotocin diabetic rats.
Egashira Y, Nakazawa A, Ohta T, Shibata K, Sanada H.
To make clear the mechanism of change of tryptophan-niacin metabolism in diabetic rats, we investigated the effect of dietary linoleic acid on the tryptophan-niacin metabolites and the activity of liver, alpha-amino-beta-carboxymuconate-epsilon-semialdehyde decarboxylase (ACMSD), a key enzyme of tryptophan-niacin metabolism, in streptozotocin diabetic rats. Moreover, we investigated the involvement of linoleic acid in the induction of hepatic ACMSD activity by streptozotocin diabetes. In diabetic rats, the sum of urinary excretion of nicotinamide, N1-methylnicotinamide (MNA), N1-methyl-2-pyridone-5-carboxamide (2-Py) and N1-methyl-4-pyridone-3-carboxamide (4-Py) was higher in the fat free diet group than in the linoleic acid group, that was accompanied by the increase of tryptophan intake and reduction of body weight in the fat free diet group. In diabetic rats, hepatic ACMSD activity was higher in the fat free diet group than in the linoleic acid group. The results indicated that the induction of hepatic ACMSD activity by diabetes was not due to removal of the suppressive effect of the linoleic acid on the enzyme. In the diabetic+insulin group, hepatic ACMSD activity was significantly lower than in the diabetic group.

Posted in General.

Tagged with , , , , , , , , , , , , , , , , .


Adverse Effects of Mouth Breathing

Also see:
The Nose Knows: A Case for Nasal Breathing During High Intensity Exercise
Breathing, CO2, Performance, and Health
A Common Finding – Altered Respiration
Hyperventilation and Breathe-More Myth
GOOD BREATHING, BAD BREATHING
Carbon Dioxide Basics
Protective Altitude
Chronic hyperventilation; have you got it, what is it, and how do you fix it?
Phospholipases, PUFA, and Inflammation
Estrogen’s Role in Asthma
Unsaturated Fats and Lung Function
Bohr Effect and Cells O2 Levels: Healthy vs. Sick People

J Laryngol Otol. 1987 Jun;101(6):558-63.
Rediscovering the importance of nasal breathing in sleep or, shut your mouth and save your sleep.
Lavie P.
Recent research, stimulated by the growing awareness of the sleep apnea syndrome, has shown that nasal breathing plays a major role in the regulation of respiration in sleep. These observations are not new; they confirm century-old clinical findings on the importance of nasal breathing in sleep. The earliest account of the deleterious effects of mouth breathing in sleep was made by Lemnious Levinus towards the end of the sixteenth century. Two hundred years later, Catlin dedicated an entire book to the superiority of nasal breathing over mouth breathing in sleep; and in the late 1800’s, Cline, Wells, Griffin and others showed that obstructed nasal breathing causes sleep disorders.

Am J Rhinol. 2005 Nov-Dec;19(6):607-11.
Nasal congestion and hyperventilation syndrome.
Bartley J.
This article evaluates the prevalence of hyperventilation syndrome (HVS) in patients who continue to complain of ongoing nasal congestion, despite an apparently adequate surgical result and appropriate medical management.
METHODS:
Prospective case series of 14 patients from June 2002 to October 2003 was performed. Patients, who presented complaining of nasal congestion after previous nasal surgery and who appeared to have an adequate nasal airway with no evidence of nasal valve collapse, were evaluated for HVS. When appropriate, nasal steroids and oral antihistamines also had been tested without success. Three patients had end-tidal P(CO2) levels measured and five patients underwent breathing reeducation.
RESULTS:
All patients had an elevated respiratory rate (>18 breaths/minute) with an upper thoracic breathing pattern. Twelve of the 14 patients complaining of nasal obstruction had an elevated Nijmegen score indicative of HVS. An average number of 2.5 procedures had been performed on each patient. End-tidal P(CO2) levels were < or = 35 mmHg in the three patients who had expired P(CO2) levels measured. Breathing retraining was successful in correcting the nasal congestion in two of five patients. CONCLUSION: HVS should be included in the differential diagnosis of patients presenting with nasal congestion, particularly after failed nasal surgery. One possible explanation is increased nasal resistance secondary to low arterial P(CO2) levels. Another possible explanation is reduced alae nasae muscle activity secondary to the reduced activity of serotonin-containing raphe neurons. Additional surgery may not necessarily be the answer in HVS patients complaining of nasal congestion.

Gen Dent. 2010 Jan-Feb;58(1):18-25; quiz 26-7, 79-80.
Mouth breathing: adverse effects on facial growth, health, academics, and behavior.
Jefferson Y.
The vast majority of health care professionals are unaware of the negative impact of upper airway obstruction (mouth breathing) on normal facial growth and physiologic health. Children whose mouth breathing is untreated may develop long, narrow faces, narrow mouths, high palatal vaults, dental malocclusion, gummy smiles, and many other unattractive facial features, such as skeletal Class II or Class III facial profiles. These children do not sleep well at night due to obstructed airways; this lack of sleep can adversely affect their growth and academic performance. Many of these children are misdiagnosed with attention deficit disorder (ADD) and hyperactivity. It is important for the entire health care community (including general and pediatric dentists) to screen and diagnose for mouth breathing in adults and in children as young as 5 years of age. If mouth breathing is treated early, its negative effect on facial and dental development and the medical and social problems associated with it can be reduced or averted.

Cien Saude Colet. 2010 Mar;15(2):437-44.
[Prevalence of mouth breathing in children from an elementary school].
[Article in Portuguese]
Felcar JM, Bueno IR, Massan AC, Torezan RP, Cardoso JR.
The objective of this article is to identify the prevalence of mouth breathing in children from an elementary school. 496 questionnaires were answered by 1st and 4th grade children’s parents or sponsors in order to identify mouth-breathing. There were questions about habits, sleeping, behavior, eating, personal care and breathing. Mann-Whitney and the Chi-square tests were used to compare the variables between mouth-breathing and nose-breathing among the groups. To measure the exposure effect of the explanatory variables on mouth breathing, the test of logistic regression was used and its magnitude was calculated through Odds Ratio. The statistical significance was set at 5%, and the rate of returned questionnaires was 84.5%. The prevalence of the mouthbreathing over this population was 56.8%. The average age was 7 years old (6-9). There was no significant statistical difference between genders, considering 49.1% male and 50.9% female. The final model of logistic regression identified the variables dribble, sleeps well (negative association) and snores as factors that predict the occurrence of the mouth-breathing. The prevalence of mouthbreathing was similar to related in the literature. The variables dribble, sleeps well (negative association) and snores may be factors that predict the occurrence of mouth-breathing.

Int J Orofacial Myology. 2009 Nov;35:44-54.
Quantitative evaluation of the orofacial morphology: anthropometric measurements in healthy and mouth-breathing children.
Cattoni DM, Fernandes FD, Di Francesco RC, De Latorre Mdo R.
The anthropometric orofacial measurements of mouth-breathing children were compared to those of children with no history of speech-language disorders, according to age. Methods: 100 children participated, both males and females, with ages ranging from 7 to 11 years and 11 months, leukoderm, in mixed dentition period, with a mouth-breathing diagnosis. The control group was comprised of 254 children, of both sexes, with ages ranging from 7 to 11 years and 11 months, leukoderm, in mixed dentition period, with no history of speech-language disorders. The control group did not demonstrate any mouth-breathing. The children were submitted to anthropometric assessment and the orofacial measurements obtained were upper lip, lower lip, philtrum, upper face, middle face, lower face, and sides of the face. The instrument used was the electronic digital sliding caliper Starrett Series 727. There was statistically significant difference between the majority of the orofacial measurements of mouth-breathing children and the measurements of children with no history of speech-language disorders. Some orofacial measurements were different in the studied populations. The possibility of comparing orofacial measurements of children with and without mouth-breathing behavior allows the clinician to determine normal and altered structures of the orofacial morphology. The main advantages of the anthropometry are its noninvasive nature, its technological simplicity, low cost and objective analysis. The anthropometric procedures also have clinical applications in myofunctional assessment and therapy.

Int J Orofacial Myology. 2000 Nov;26:13-23.
Relationship between mouth breathing and postural alterations of children: a descriptive analysis.
Krakauer LH, Guilherme A.
The research within this article seeks to verify and demonstrate the consequences of mouth breathing versus nasal respiration and to view supposed postural alterations in groups of children within specific age ranges. The authors state that children with nasal respiration, age 8 and above, present with better posture than those who continue oral breathing beyond age 8. The importance of picture documentation is stressed in order to provide the most information regarding postural changes. A review of research and literature is provided in the article.

Orthod Fr. 2000 Jan;71(1):27-35.
[Could mouth breathing lead to obstructive sleep apnea syndromes. A preliminary study].
[Article in French]
Raskin S, Limme M, Poirrier R.
The aim of this preliminary work is to determine an easy method to diagnose “buccal breather” children and “nasal breather” children. Then, to establish a possible connection with the syndrome of obstructive sleep apnea. 22 children agreed to participate. Clinical, orthophonic, orthodontic, postural and polysomnographical exams have been carried out. The proposed clinical exam turns out to be a good means of diagnosing between buccal breathers and nasal breathers. The aerophonoscope reveals velar inadequacies in buccal breathers. The latter also present osseous discrepancies mainly in the mandible. The polysomnography reveals a higher apnea/hypopnea index and more agitated sleep in buccal breathers. Mandibular lowering movements are more frequent and similar to those of adults suffering from apnea. These elements similar to those encountered in adults suffering from apnea make us think that buccal breathing could be the origin of obstructive sleep apnea, several decades later.

Int J Pediatr Otorhinolaryngol. 2010 Sep;74(9):1021-7. Epub 2010 Jun 20.
Craniocervical posture and hyoid bone position in children with mild and moderate asthma and mouth breathing.
Chaves TC, de Andrade e Silva TS, Monteiro SA, Watanabe PC, Oliveira AS, Grossi DB.
INTRODUCTION:
The objective of the present study was to assess the craniocervical posture and the positioning of the hyoid bone in children with asthma who are mouth breathers compared to non-asthma controls.
METHODS:
The study was conducted on 56 children, 28 of them with mild (n=15) and moderate (n=13) asthma (14 girls aged 10.79+/-1.31 years and 14 boys aged 9.79+/-1.12 years), matched for sex, height, weight and age with 28 non-asthma children who are not mouth breathers. The sample size was calculated considering a confidence interval of 95% and a prevalence of 4% of asthma in Latin America. Eighteen variables were analyzed in two radiographs (latero-lateral teleradiography and lateral cervical spine radiography), both obtained with the head in a natural position. The independent t-test was used to compare means values and the chi-square test to compare percentage values (p<0.05). Intraclass correlation coefficient (ICC) was used to verify reliability.
RESULTS:
The Craniovertebral Angle (CVA) was found to be significantly smaller in asthma than in control children (106.38+/-7.66 vs. 111.21+/-7.40, p=0.02) and the frequency of asthma children with an absent or inverted hyoid triangle was found to be significantly higher compared to non-asthma children (36% vs. 7%, p=0.0001). The values of the inclination angles of the superior cervical spine in relation to the horizontal plane were significantly higher in moderate than in mild asthma children (CVT/Hor: 85.10+/-7.25 vs. 90.92+/-6.69, p=0.04 and C1/Hor: 80.93+/-5.56 vs. 85.00+/-4.20, p=0.04).
CONCLUSIONS:
These findings revealed that asthma children presented higher head extension and a higher frequency of changes in hyoid bone position compared to non-asthma children and that greater the asthma severity greater the extension of the upper cervical spine.

J Clin Pediatr Dent. 1995 Spring;19(3):191-4.
Hyoid bone and atlas vertebra in established mouth breathers: a cephalometric study.
Kumar R, Sidhu SS, Kharbanda OP, Tandon DA.
The position of hyoid bone and atlas vertebra in 29 established mouth breathers (17 boys and 12 girls) in the age group of 10-14 years were cephalometrically evaluated and compared with 23 nose breathers (11 boys and 12 girls). The children of both the groups were selected on the basis of history and clinical examination. The comparisons were made using univariate analysis for male and female groups separately as well as combined. It was observed that mouth breathers do maintain an extended head posture, which was evident from a decrease in distance between the occiput and dorsal arch of atlas vertebra. However the results of the present study did not reveal any distinct characteristics of hyoid bone and atlas vertebra that can be used to predict or associate the craniofacial pattern of mouth breathers.

J Clin Sleep Med. 2009 Dec 15;5(6):554-61.
Polysomnographic findings are associated with cephalometric measurements in mouth-breathing children.
Juliano ML, Machado MA, de Carvalho LB, Zancanella E, Santos GM, do Prado LB, do Prado GF.
OBJECTIVES:
Children with adenotonsillar hypertrophy and those with an abnormal craniofacial morphology are predisposed to having sleep disordered breathing; many of these children are mouth breathers. The aim of this study was to determine whether an association exists between polysomnographic findings and cephalometric measures in mouth-breathing children.
METHODS:
Twenty-seven children (15 mouth-breathing children and 12 nose-breathing children [control subjects]), aged 7 to 14 years, took part in the study. Polysomnographic variables included sleep efficiency, sleep latency, apnea-hypopnea index, oxygen saturation, arousal index, number of periodic limb movements in sleep, and snoring. Cephalometric measures included maxilla and mandible position, occlusal and mandibular plane inclination, incisor position, pharyngeal airway space width, and hyoid bone position.
RESULTS:
As compared with nose-breathing children, mouth breathers were more likely to snore (p < 0.001) and to have an apnea-hypopnea index greater than 1 (p = 0.02). Mouth-breathing children were also more likely to have a retruded mandible, more inclined occlusal and mandibular planes, a smaller airway space, and a smaller superior pharyngeal airway space (p < 0.01). The apnea-hypopnea index increased as the posterior airway space decreased (p = 0.05).
CONCLUSIONS:
Our study showed an association between polysomnographic data and cephalometric measures in mouth-breathing children. Snoring was the most important variable associated with abnormal craniofacial morphology. Orthodontists should send any mouth-breathing child for an evaluation of sleep if they find that the child has a small superior pharyngeal airway space or an increased ANB (the relationship between the maxilla and mandible), NS.PIO (occlusal plane inclination in relationship to the skull base), or NS.GoGn (the mandibular plane inclination in relation to the skull base), indicating that the child has a steeper mandibular plane.

J Pediatr (Rio J). 2010 May-Jun;86(3):202-8. Epub 2010 May 6.
The impact of speech therapy on asthma and allergic rhinitis control in mouth breathing children and adolescents.
Campanha SM, Fontes MJ, Camargos PA, Freire LM.
OBJECTIVE:
To determine the impact of speech therapy on asthma and allergic rhinitis control in mouth breathing children and adolescents.
METHODS:
This was a quasi-experimental randomized study of 24 mouth breathing patients with asthma and allergic rhinitis, aged from 6 to 15 years. All patients were taking beclomethasone diproprionate through oral inhalation at the start of the study. At enrollment on the study, oral inhalation was substituted with exclusively nasal inhalation and 1 month later half of the patients began speech therapy. They attended 16 speech therapy sessions in 8 weeks and continued taking beclomethasone dipropionate through exclusively nasal inhalation (BDT group). The comparison group received only beclomethasone diproprionate through exclusively nasal inhalation (BDI group). Both groups were assessed five times. Clinical scores were calculated for allergic rhinitis and asthma, an adapted version of the Marchesan orofacial myofunctional assessment protocol was applied, and parents/guardians’ observations were recorded, in addition to spirometry measurements of peak inspiratory and peak expiratory flow.
RESULTS:
There were significant improvements in the BDT group: clinical asthma score at T5 (p = 0.046); peak inspiratory flow at T4 (p = 0.030); peak expiratory flow at T3 (p = 0.008); breathing mode and lip position (p = 0.000) from T3 onwards; and parents/guardians’ observations at T2, T4, and T5 (p = 0.010; p = 0.027; p = 0.030).
CONCLUSIONS:
Speech therapy in combination with beclomethasone diproprionate through exclusively nasal inhalation resulted in earlier and longer-lasting clinical and functional control of asthma, allergic rhinitis, and mouth breathing than was achieved in the group that only took beclomethasone diproprionate.

Clinics (Sao Paulo). 2011;66(6):939-42.
Association between halitosis and mouth breathing in children.
Motta LJ, Bachiega JC, Guedes CC, Laranja LT, Bussadori SK.
OBJECTIVE:
To determine whether there is a correlation between halitosis and mouth breathing in children.
STUDY DESIGN:
Fifty-five children between 3 and 14 years of age were divided into two groups (nasal and mouth breathing) for the assessment of halitosis. A descriptive analysis was conducted on the degree of halitosis in each group. The chi-square test was used for comparison between groups, with a 5% level of significance.
RESULTS:
There was a significantly greater number of boys with the mouth-breathing pattern than girls. A total of 23.6% of the participants had no mouth odor, 12.7% had mild odor, 12.7% had moderate odor and 50.9% had strong odor. There was a statistically significant association between halitosis and mouth breathing.
CONCLUSIONS:
The occurrence of halitosis was high among the children evaluated, and there was a statistically significant association between halitosis and mouth breathing.

Braz J Otorhinolaryngol. 2006 May-Jun;72(3):394-9.
Prevalence and factors related to mouth breathing in school children at the Santo Amaro project-Recife, 2005.
De Menezes VA, Leal RB, Pessoa RS, Pontes RM.
AIM:
To determine the prevalence of mouth breathing children at the santo amaro project/ esef/ upe, and study their main facial and behavior alterations.
STUDY DESIGN:
transversal study.
MATERIAL AND METHODS:
there were 150 children in the sample, with ages ranging from 8 to 10 years. Data was collected by means of a questionnaire and clinical examinations. As for their breathing assessment, two tests were carried out: test 1- breath steam against a mirror; and test 2 -water remains in the mouth with lips closed for 3 minutes.
RESULTS:
mouth breathing prevalence was of 53.3%. There was no significant difference between gender, age and type of breathing. Facial alterations were:incomplete lip closure ( 58.8%X5,7%), fallen eyes ( 40.0%X1.4%), High palate ( 38.8%X2.9%), Anterior open bite ( 60.0% Versus 30.0%), Hypotonic lips ( 3.8%X0.0%), Circles under the eyes (97.5% Versus 77.1%).
CONCLUSION:
high mouth breathing prevalence without significant statistical difference between genders,age and type of mouth breathing. There was no association between behavior characteristics and type of breathing. There were significant differences between physical traits and breathing pattern.

Otolaryngol Head Neck Surg. 1981 Sep-Oct;89(5):804-10.
Sleep and breathing disturbance secondary to nasal obstruction.
Olsen KD, Kern EB, Westbrook PR.
The purpose of this study was to determine the effect of acute nasal obstruction on sleep and breathing in eight normal persons. The subjects were randomized into two groups. One night the subject was studied with the nose open and a second night with the nose obstructed. The electroencephalogram, electrocardiogram, inspiratory effort, nasal and oral airflow, and oxygen saturation were monitored. Sleep proved to be both subjectively and objectively disturbed. The subjects with the nose obstructed awoke more often, had a greater number of changes in sleep stage, had a prolongation of rapid-eye-movement (REM) latency, and spent a greater amount of time in stage I non-REM sleep (light sleep). Acute nasal obstruction caused a statistically significant increase in the number of partial and total obstructive respiratory events (obstructive hypopnea and obstructive apnea). Sleep apnea developed in one subject during this study merely on the basis of acute nasal obstruction.

Am Rev Respir Dis. 1981 Aug;124(2):158-60.
Disturbed sleep and prolonged apnea during nasal obstruction in normal men.
Zwillich CW, Pickett C, Hanson FN, Weil JV.
Anecdotal observations suggested that poor quality of sleep is a frequent complaint during upper respiratory infections (URI). Nasal obstruction occurs frequently during URI and causes sleep apnea in some infants. Sleep apnea disrupts normal sleep and could explain the complaints of poor sleep quality during URI in adults. Accordingly, 10 normal men had full night recordings of sleep stages and breathing rhythm before and during nasal obstruction. The order of obstructed and nonobstructed nights was randomized after a standard acclimatization night. During nasal obstruction, time spent in the deep sleep stages decreased from 90 +/- 11.2 (SEM) to 71 +/- 12.9 min (p less than 0.05), whereas significantly more time was spent in Stage 1 sleep (p less than 0.03). This loss of deep sleep during obstruction was associated with a twofold increase in sleep arousals and awakening (p less than 0.01) resulting from an increased (p less than 0.02) number of apneas (34 +/-19 during control sleep versus 86 +/- 34 during obstructed sleep). Apneas of 20 to 39 s in duration became 2.5 times more frequent (p less than 0.05) during obstruction. Oxygen saturation was studied in the last 4 subjects using an ear oximeter. Desaturation (SaO2 less than 90%) occurred 27 times during control sleep compared with 255 times during obstructed sleep. These desaturation episodes occurred only during apneas. All men complained of poor sleep quality during nasal obstruction. We concluded that apneas, sleep arousals and awakenings, and loss of deep sleep occur during nasal obstruction and may explain complaints of poor sleep quality during URI.

J Pediatr (Rio J). 2011 Jul-Aug;87(4):357-63. Epub 2011 Jul 18.
Assessment of the body posture of mouth-breathing children and adolescents.
Conti PB, Sakano E, Ribeiro MA, Schivinski CI, Ribeiro JD.
OBJECTIVE:
To investigate associations between mouth breathing (MBr), nose breathing (NBr) and body posture classification and clinical variables in children and adolescents, by comparing patients with mouth breathing syndrome with a control group of similar age.
METHODS:
This was an observational, analytical, controlled, cross-sectional study conducted at a university hospital. Children aged 5 years or more were recruited to one of two groups: healthy controls (NBr) or an MBr group. The MBr group comprised patients with a diagnosis of mouth breathing syndrome confirmed by clinical examination by a physician plus nasal endoscopy. The control group comprised healthy volunteers of the same age, with NBr confirmed by medical examination. All participants underwent postural assessment. Data were analyzed using the Mann-Whitney nonparametric test, the chi-square test and Fisher’s exact test, to a significance level of 0.05%.
RESULTS:
A total of 306 MBr and 124 NBr were enrolled. Mouth breathers were more likely to be male (p = 0.0002), have more frequent and more severe nasal obstruction and larger tonsils (p = 0.0001) than NBr. Mouth breathers also exhibited higher incidence rates of allergic rhinitis (p = 0.0001), of thoracic respiratory pattern (p = 0.0001), high-arched palate (p = 0.0001) and unfavorable postural classifications (p = 0.0001) with relation to the control group. Postural classification scores were directly proportional to nasal obstruction (p = 0.0001) and male sex (p = 0.0008).
CONCLUSIONS:
Postural problems were significantly more common among children in the group with mouth breathing syndrome, highlighting the need for early interdisciplinary treatment of this syndrome.

J Pediatr (Rio J). 2008 Nov-Dec;84(6):529-35.
Etiology, clinical manifestations and concurrent findings in mouth-breathing children.
[Article in English, Portuguese]
Abreu RR, Rocha RL, Lamounier JA, Guerra AF.
OBJECTIVE:
To investigate the etiology, main clinical manifestations and other concurrent findings in mouth-breathing children aged 3 to 9 years and resident in the urban area of Abaeté (MG), Brazil.
METHODS:
This study was based on a representative random sample of the town population, of 23,596 inhabitants. Clinical diagnosis of mouth-breathing was defined as a combination of snoring, sleeping with mouth open, drooling on the pillow and frequent or intermittent nasal obstruction. Children with a clinical diagnosis of mouth-breathing underwent nasal endoscopy, allergy skin tests and X ray of the rhinopharynx, full blood tests, eosinophil counts, total IgE assay and fecal parasitology. Data were analyzed using SPSS version 10.5.
RESULTS:
The main causes of mouth-breathing were: allergic rhinitis (81.4%), enlarged adenoids (79.2%), enlarged tonsils (12.6%), and obstructive deviation of the nasal septum (1.0%). The main clinical manifestations of mouth breathers were: sleeping with mouth open (86%), snoring (79%), itchy nose (77%), drooling on the pillow (62%), nocturnal sleep problems or agitated sleep (62%), nasal obstruction (49%), and irritability during the day (43%).
CONCLUSION:
Certain clinical manifestations are very common among mouth-breathing children. These manifestations must be recognized and considered in the clinical diagnosis of mouth-breathing.

Laryngoscope. 2010 Oct;120(10):2089-93.
The effect of mouth breathing versus nasal breathing on dentofacial and craniofacial development in orthodontic patients.
Harari D, Redlich M, Miri S, Hamud T, Gross M.
OBJECTIVES/HYPOTHESIS:
To determine the effect of mouth breathing during childhood on craniofacial and dentofacial development compared to nasal breathing in malocclusion patients treated in the orthodontic clinic.
STUDY DESIGN:
Retrospective study in a tertiary medical center.
METHODS:
Clinical variables and cephalometric parameters of 116 pediatric patients who had undergone orthodontic treatment were reviewed. The study group included 55 pediatric patients who suffered from symptoms and signs of nasal obstruction, and the control group included 61 patients who were normal nasal breathers.
RESULTS:
Mouth breathers demonstrated considerable backward and downward rotation of the mandible, increased overjet, increase in the mandible plane angle, a higher palatal plane, and narrowing of both upper and lower arches at the level of canines and first molars compared to the nasal breathers group. The prevalence of a posterior cross bite was significantly more frequent in the mouth breathers group (49%) than nose breathers (26%), (P = .006). Abnormal lip-to-tongue anterior oral seal was significantly more frequent in the mouth breathers group (56%) than in the nose breathers group (30%) (P = .05).
CONCLUSIONS:
Naso-respiratory obstruction with mouth breathing during critical growth periods in children has a higher tendency for clockwise rotation of the growing mandible, with a disproportionate increase in anterior lower vertical face height and decreased posterior facial height.

Arq Neuropsiquiatr. 2009 Sep;67(3B):860-5.
Mouth breathing children have cephalometric patterns similar to those of adult patients with obstructive sleep apnea syndrome.
Juliano ML, Machado MA, Carvalho LB, Prado LB, do Prado GF.
OBJECTIVE:
To determine whether mouth breathing children present the same cephalometric patterns as patients with obstructive sleep apnea syndrome (OSAS).
METHOD:
Cephalometric variables were traced and measured on vertical lateral cephalometric radiographs. The cephalometric measurements of 52 mouth and 90 nose breathing children were compared with apneic patients. The children had not undergone adenoidectomy or tonsillectomy and had not had or were not receiving orthodontic or orthopedic treatment.
RESULTS:
Mouth breathing children showed same cephalometric pattern observed in patients with OSAS: a tendency to have a retruded mandible (p=0.05), along with greater inclination of the mandibular and occlusal planes (p<0.01) and a tendency to have greater inclination of the upper incisors (p=0.08). The nasopharyngeal and posterior airway spaces were greatly reduced in mouth breathing children, as observed in patients with apnea (p<0.01).
CONCLUSION:
Mouth breathing children present abnormal cephalometric parameters and their craniofacial morphology resembles that of patients with OSAS.

Epilepsy Behav. 2008 Aug;13(2):284-9. Epub 2008 May 27.
Mouth breathing increases the pentylenetetrazole-induced seizure threshold in mice: a role for ATP-sensitive potassium channels.
Niaki SE, Shafaroodi H, Ghasemi M, Shakiba B, Fakhimi A, Dehpour AR.
Nasal obstruction and consequent mouth breathing have been shown to change the acid-base balance, producing respiratory acidosis. Additionally, there exists a large body of evidence maintaining that acidosis affects the activity of ATP-sensitive potassium (K(ATP)) channels, which play a crucial role in the function of the central nervous system (CNS), for example, in modulating seizure threshold. Thus, in the study described here, we examined whether mouth breathing, induced by surgical ligation of nostrils, could affect the seizure threshold induced by pentylenetetrazole in male NMRI mice. Using the selective K(ATP) channel opener (diazoxide) and blocker (glibenclamide), we also evaluated the possible role of K(ATP) channels in this process. Our data revealed that seizure threshold was increased 6 to 72 hours after nasal obstruction, reaching a peak 48 hours afterward, compared with either control or sham-operated mice (P<0.01). There was a significant decrease in pH of arterial blood samples and increase in CO(2) partial pressure (PCO(2)) during this time. Systemic injection of glibenclamide (1 and 2mg/kg, ip, daily) significantly prevented the increase in seizure threshold in 48-hour bilaterally nasally obstructed mice, whereas it had no effect on seizure threshold in sham-operated mice. Systemic injection of diazoxide (25mg/kg, ip, daily) had no effect on seizure threshold in all groups, whereas higher doses (50 and 100mg/kg, ip, daily) significantly increased seizure threshold in both 48-hour-obstructed and sham-operated mice. The decrease in seizure threshold induced by glibenclamide (2mg/kg, ip, daily) was prevented by diazoxide (25mg/kg, ip, daily). These results demonstrate for the first time that mouth breathing, which could result in respiratory acidosis, increases seizure threshold in mice and K(ATP) channels may play a role in this effect.

Respirology. 2008 Jun;13(4):553-8.
Enforced mouth breathing decreases lung function in mild asthmatics.
Hallani M, Wheatley JR, Amis TC.
BACKGROUND AND OBJECTIVE:
Nasal breathing provides a protective influence against exercise-induced asthma. We hypothesized that enforced oral breathing in resting mild asthmatic subjects may lead to a reduction in lung function.
METHODS:
Asymptomatic resting mild asthmatic volunteers (n = 8 ) were instructed to breathe either nasally only (N; tape over lips) or orally only (O; nose clip) for 1 h each, on separate days. Lung function (% predicted FEV(1)) was measured using standard spirometry at baseline and every 10 min for 1 h. ‘Difficulty in breathing’ was rated using a Borg scale at the conclusion of the N and O periods.
RESULTS:
Baseline FEV(1) on the N (101.2 +/- 3.8% predicted) and O (102.7 +/- 3.9% predicted) days was not significantly different (P > 0.3). At 60 min, FEV(1) on the O day (96.5 +/- 4.1% predicted) was significantly less than on the N day (101.0 +/- 3.5% predicted; P < 0.009). On the N day, FEV(1) did not change with time (P > 0.3), whereas on the O day, FEV(1) fell progressively (slope = -0.06 +/- 0.01% FEV(1)/min, P < 0.0001; linear mixed effects modelling). Three subjects experienced coughing/wheezing at the end of the O day but none experienced symptoms at the end of the N day. Subjects perceived more 'difficulty breathing in' at the end of the O day (1.5 +/- 0.4 arbitrary units) than on the N day (0.4 +/- 0.3 arbitrary unit; P < 0.05). CONCLUSIONS: Enforced oral breathing causes a decrease in lung function in mild asthmatic subjects at rest, initiating asthma symptoms in some. Oral breathing may play a role in the pathogenesis of acute asthma exacerbations.

Chest. 1999 Dec;116(6):1646-52.
Route of breathing in patients with asthma.
Kairaitis K, Garlick SR, Wheatley JR, Amis TC.
STUDY OBJECTIVES:
To measure route of breathing in chronic asthmatic patients during and after an acute severe exacerbation.
PATIENTS OR PARTICIPANTS:
Thirteen asthmatic patients were studied during hospital admission for acute asthma and, in 9 patients, again when asymptomatic. Nine healthy subjects were also studied.
INTERVENTIONS:
Spontaneous route of breathing was qualitatively assessed using oral and nasal thermistor probes, and was then quantified using a dual compartment face mask with attached pneumotachographs.
MEASUREMENTS AND RESULTS:
All asthmatic patients had severe bronchoconstriction initially (FEV(1), 46 +/- 3% of predicted) that had resolved at follow-up (FEV(1), 91 +/- 6% of predicted). No healthy subject had evidence of bronchoconstriction (FEV(1), 102 +/- 5% of predicted). During acute asthma, 11 asthmatics were spontaneously breathing oronasally, as assessed using thermistor probes, while all 13 breathed oronasally via face mask. When assessed using thermistor probes, seven of nine asymptomatic asthmatic patients studied were breathing exclusively via the nose; however, all breathed oronasally via face mask. In contrast, while eight of nine healthy subjects were also breathing exclusively via the nose when assessed using thermistor probes, all breathed nasally only via face mask.
CONCLUSIONS:
Thus, when asymptomatic and at rest, asthmatic patients breathe exclusively via the nose. However, during acute exacerbations of asthma, these patients switch to oronasal breathing. Unlike healthy subjects, chronic asthmatic patients also switch to oronasal breathing when wearing a face mask, irrespective of the degree of bronchoconstriction. We speculate that asthmatics may have an increased tendency to switch to oral breathing, a factor that may contribute to the pathogenesis of their asthma.

Int J Pediatr Otorhinolaryngol. 2009 Feb;73(2):227-36. Epub 2008 Dec 3.
Orientation and position of head posture, scapula and thoracic spine in mouth-breathing children.
Neiva PD, Kirkwood RN, Godinho R.
OBJECTIVE:
Mouth-breathing is a common clinical condition among school-age children and some studies have correlated this condition with quality of life and postural alterations. Therefore, the objective of this study was to investigate the orientation and position of the scapula, thoracic spine and head posture among mouth-breathing (MB) children and nasal-breathing (NB) children.
METHODS:
Twenty-one male MB children and 21 male NB children between 8 and 12 years of age participated in the study. Data were obtained through a stereophotogrammetry system that uses passive markers over anatomical landmarks to capture the position of the segments. Internal rotation, upward rotation, anterior tilt, scapular elevation and abduction were measured bilaterally as well as thoracic kyphosis, forward head position and shoulder protrusion.
RESULTS:
The MB children showed increased scapular superior position in relation to the NB group. No statistically significant differences were found between groups regarding the angular and linear measurements of the scapula. To verify reliability, three measurements were taken for each variable in the study. The intraclass correlation coefficient (ICC) showed results above 0.8 for all the variables except for the internal rotation angle (I-Rot), below 0.5, probably due to uncertainty in the palpation of the inferior angle of the scapula. Ninety-five percent of the NB children and 58% among the MB children had been breastfed, this difference was statistically significant. There were statistically significant differences between groups regarding the domains of the Autoquestionnaire Qualité de Vie Enfant Imagé (AUQEI) scale and body mass index, which was higher among the NB children.
CONCLUSIONS:
MB children increased scapular superior position in comparison to NB children due probably to the position of forward head, leading to an alteration in the positioning of the mandible. The absence of significantly difference in posture pattern between groups in the present study could attributed to height-weight development in this age, as the posture of children changes in order to adapt to new body proportions, regardless of health status. The results observed in this study demonstrate the importance of using reliable measurements in the postural assessment of MB and NB children helping physical therapists to focus their strategies during rehabilitation in more specific conditions.

J Pediatr (Rio J). 2008 Mar-Apr;84(2):171-7.
The relationship between excursion of the diaphragm and curvatures of the spinal column in mouth breathing children.
Yi LC, Jardim JR, Inoue DP, Pignatari SS.
OBJECTIVE:
To investigate the relationship between excursion of the diaphragm muscle and spinal curvatures in mouth breathing children.
METHODS:
A total of 52 children of both sexes, aged from 5 to 12 years, were studied. After otorhinolaryngological assessment, the children were divided into two groups: mouth breathers and nose breathers. All of the children underwent videofluoroscopic examination of the diaphragm muscle and postural assessment. Diaphragm excursion was analyzed using Adobe Photoshop software, and postural assessment was recorded using photographs in left lateral view, which were then analyzed using SAPO postural assessment software.
RESULTS:
The groups studied exhibited statistically significant differences in terms of spinal curvatures (cervical lordosis: p = 0.003; lumbar lordosis: p = 0.001; thoracic kyphosis: p = 0.002; position of the pelvis: p = 0.001) and diaphragm excursion (right side diaphragm: p = 0.001; left side diaphragm: p = 0.001). The mouth breathing group exhibited reduced cervical lordosis, increased thoracic kyphosis, increased lumbar lordosis and the position of the pelvis was tilted forward. The distance traveled outwards by the diaphragm muscles of mouth breathing children was shorter than that traveled by the muscles of nose breathing children. The relationship between the behavior of spinal curvatures and diaphragm excursion had no statistical significance.
CONCLUSION:
There was no relationship between spinal curvatures and diaphragm excursion in the groups studied here.

Pro Fono. 2007 Oct-Dec;19(4):347-51.
[Characteristics of the stomatognathic system of mouth breathing children: anthroposcopic approach].
[Article in Portuguese]
Cattoni DM, Fernandes FD, Di Francesco RC, Latorre Mdo R.
BACKGROUND:
the use of anthroposcopy in the assessment of posture and morphology of the stomatognathic system of mouth breathing children.
AIM:
to describe the postural and morphologic characteristics of the stomatognathic system of mouth breathing children, according to age.
METHOD:
participants were 100 children, of both genders, with ages ranging from 7 to 11 years and 11 months, leukoderms, in mixed dentition and with the diagnosis of mouth breathing. The investigated postural and morphologic characteristics of the stomatognathic system were labial and lingual resting position, possibility of labial occlusion, hyperfunction of the mentalis muscle during labial occlusion, bite and morphology of the lower lip, cheeks and hard palate, using the anthroposcopy methodology.
RESULTS:
the results referring to the characterization of the studied population, according to the most frequent otorhinolaryngologic diagnosis, was of enlarged pharyngeal and palatine tonsils. A statistically significant difference was found between the percentages of each otorhinolaryngologic diagnosis, according to age. The results of the characteristics of the stomatognathic system indicated that the most common aspects in the studied sample were: half-open lips when in the resting position, tongue lowered on the mouth’s floor in the resting position, possibility of labial occlusion, hyperfunction of the mentalis muscle during labial occlusion, alterations of bite, labioverted, symmetry of the cheeks and alteration of the hard palate. All of the studied characteristics presented the same frequency with the increase in age, with no statistically significant difference.
CONCLUSION:
mouth breathing children presented pathologic adaptations in the postural and morphological characteristics of the stomatognathic system. This suggests the importance of early diagnosis in order to avoid orofacial alterations.

Aust J Sci Med Sport. 1995 Sep;27(3):51-5.
Comparison of maximal oxygen consumption with oral and nasal breathing.
Morton AR, King K, Papalia S, Goodman C, Turley KR, Wilmore JH.
The major cause of exercise-induced asthma (EIA) is thought to be the drying and cooling of the airways during the ‘conditioning’ of the inspired air. Nasal breathing increases the respiratory system’s ability to warm and humidity the inspired air compared to oral breathing and reduces the drying and cooling effects of the increased ventilation during exercise. This will reduce the severity of EIA provoked by a given intensity and duration of exercise. The purpose of the study was to determine the exercise intensity (%VO2 max) at which healthy subjects, free from respiratory disease, could perform while breathing through the nose-only and to compare this with mouth-only and mouth plus nose breathing. Twenty subjects (11 males and 9 females) ranging from 18-55 years acted as subjects in this study. They were all non-smokers and non-asthmatic. At the time of the study, all subjects were involved in regular physical activity and were classified, by a physician, as free from nasal polyps or other nasal obstruction. The percentage decrease in maximal ventilation with nose-only breathing compare to mouth and mouth plus nose breathing was three times the percentage decrease in maximal oxygen consumption. The pattern of nose-only breathing at maximal work showed a small reduction in tidal volume and large reduction in breathing frequency. Nasal breathing resulted in a reduction in FEO2 and an increase in FECO2. While breathing through the nose-only, all subjects could attain a work intensity great enough to produce an aerobic training effect (based on heart rate and percentage of VO2 max).

Posted in General.

Tagged with , , , , , , , , , , , , , , , .


Calorie Restriction, PUFA, and Aging

Also see:
Protect the Mitochondria
PUFA Accumulation & Aging
Unsaturated Fats and Longevity
Anti-Inflammatory Omega -9 Mead Acid (Eicosapentaenoic acid)
Protective “Essential Fatty Acid Deficiency”
“Curing” a High Metabolic Rate with Unsaturated Fats
Fat Deficient Animals – Activity of Cytochrome Oxidase
Dietary PUFA Reflect in Human Subcutaneous Fat Tissue
Toxicity of Stored PUFA
PUFA, Development, and Allergy Incidence
PUFA, Aging, Cytochrome Oxidase, and Cardiolipin

Quotes by Ray Peat, PhD:
“Calorie-restricted animals (on a diet of normal composition) have a lower degree of fat unsaturation in their mitochondria as they age, preserving the relatively more saturated fats of youth.”

“In this culture that repeatedly makes such claims of essentiality, the growing number of reports of biological superiority of “deficient” animals suggests that nutritional research may be near the point at which it can resume the line of study begun by Northrup, Osborne, Mendel, Drummond, Bernstein, Elias, and others, that was interrupted for 60 years by industrial interests that promoted antiscientific opinions.

For example, in 1914 F.P. Rous showed that limiting food intake reduced the incidence of cancer, and then in 1915 and 1917, Osborne and Mendel showed that food restriction extended the fertility and longevity of female rats. The association between estrogen and cancer had become known during this time, and vitamin E, which was originally known as the fertility vitamin, was soon recognized to have antiestrogenic properties, as well as to prevent the deadly effects of excessive polyunsaturated fats in the diet. My endocrinology professor, A.S. Soderwall, who had found that excess estrogen prevented (or interrupted) pregnancy, demonstrated that increased vitamin E extended fertility in aging female rodents.

By the time I began my research, it seemed clear that it had been the reduction of PUFA in the diet which, like the addition of vitamin E, had prevented sterility in the calorie restriction experiments, and that those treatments had limited the effects of estrogen in the aging organisms.”

“Caloric restriction does extend the life span of many species, but it generally preserves the high metabolic rate of youth, so that at a given age the calorie-restricted animal has a higher rate of oxygen consumption per gram of body weight than the unrestricted eaters”

Mech Ageing Dev. 2005 Sep;126(9):1003-10.
Membrane alteration as a basis of aging and the protective effects of calorie restriction.
Yu BP.
As has been experimentally determined, oxidative modification to biological systems can be extensive, although the identification and stochiometric relation of the reactive species that cause these alterations have not been fully elucidated. In this review, arguments are presented to support the notion that the combined effects of membrane lipid peroxidation and its by-products, reactive aldehydes are likely responsible for membrane-associated functional declines during aging. As evidence for a systemic response to overall oxidative stress, the molecular inflammation hypothesis of aging is discussed by considering that the activation of inflammatory genes act as a bridge linking normal aging to pathological processes.

The phospholipids of mitochondria and microsomes become more unsaturated with aging (Laganiere and Yu, 1993, Lee, et al., 1999). -Ray Peat, PhD

Gerontology. 1993;39(1):7-18.
Modulation of membrane phospholipid fatty acid composition by age and food restriction.
Laganiere S, Yu BP.
Phospholipids from liver mitochondrial and microsomal membrane preparations were analyzed to further assess the effects of age and lifelong calorie restriction on membrane lipid composition. Results showed that the major phospholipid classes, phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylinositol and cardiolipin did not vary significantly with age or diet. The fatty acid composition of the phospholipids was determined in PC and PE and ages of 6, 12 and 24 months. The data revealed characteristic patterns of age-related changes in ad libitum (AL) fed rats: membrane levels of long-chain polyunsaturated fatty acids, 22:4 and 22:5, increased progressively, while membrane linoleic acid (18:2) decreased steadily with age. Levels of 18:2 fell by approximately 40%, and 22:5 content almost doubled making the peroxidizability index increase with age. In addition, levels of 16:1 and 18:1 decreased significantly with age, indicating a possible change in delta 9-desaturase activity coefficient. Food restriction resulted in a significant increase in levels of essential fatty acids while attenuating levels of 22:4, 22:5, 22:6 and peroxidizability. We concluded that the membrane-stabilizing action of long-term calorie restriction relates to the selective modification of membrane long-chain polyunsaturated fatty acids during aging.

Free Radic Biol Med. 1999 Feb;26(3-4):260-5.
Modulation of cardiac mitochondrial membrane fluidity by age and calorie intake.
Lee J, Yu BP, Herlihy JT.
The aim of the present study was to determine the effects of dietary restriction (DR) on the age-related changes in membrane fluidity, fatty acid composition and free radical damage of mitochondrial membranes obtained from the rat left ventricle. Mitochondrial membrane preparations were obtained from the left ventricles of 6- and 24-month-old, male, Fischer 344 rats that were allowed to eat throughout their life either ad lib (Group A) or only 60% of the amount consumed by the ad lib fed group (Group B). Our results show that the membrane fluidity of the 24 month Group A hearts was less than that of the 6 month group A hearts. No differences in membrane fluidity were observed between the 6 and 24 month DR groups. The fatty acid composition of the mitochondrial membranes of the two ad lib fed groups differed: the long-chain polyunsaturated 22:4 fatty acid was higher in the older group, although linoleic acid (18:2) was lower. DR eliminated the differences. No statistically significant difference in the overall polyunsaturated fatty acid content was noted. However, the peroxidizability index was higher in the membranes of the 24 month Group A hearts but not in the 24 month Group B hearts. Finally, the degree of lipid damage, as assessed in vitro by the induced production of reactive oxygen species, was elevated in the 24 month Group A hearts. No difference was observed between the young and old DR groups. Considered together, these results suggest that DR maintains the integrity of the cardiac mitochondrial membrane fluidity by minimizing membrane damage through modulation of membrane fatty acid profile.

Biochem Biophys Res Commun. 1987 Jun 30;145(3):1185-91.
Anti-lipoperoxidation action of food restriction.
Laganiere S, Yu BP.
Chronic food restriction inhibited the age-related increase of malondialdehyde production and lipid hydroperoxides in liver mitochondrial and microsomal membranes of ad libitum fed Fischer 344 rats. The anti-lipoperoxidation action of food restriction could not be attributable to the changes in membrane lipid content nor vitamin E status. Restricting calories modified membrane fatty acid composition by increasing linoleic acid and decreasing docosapentaenoic acid content in both membranes. The significance of the fatty acid modification was discussed in terms of anti-lipoperoxidation and membrane fluidity.

Aging Clin Exp Res. 2004 Dec;16(6):425-31.
Effects of dietary restriction on age-related changes in the phospholipid fatty acid composition of various rat tissues.
Tamburini I, Quartacci MF, Izzo R, Bergamini E.
BACKGROUND AND AIMS:
Polyunsaturated fatty acids (PUFAs) are essential components of the cell lipid bilayer and are involved in membrane fluidity and normal functioning, but they are vulnerable to free radical attack. Given the role of oxidative stress in the aging process, age-related changes in phospholipid fatty acid (PLFA) composition in rat liver, kidney and heart were assessed in 3-, 12- and 24-month-old rats fed either ad libitum but only every other day, or daily but only 60% of the quantity normally consumed by age-matched controls.
METHODS:
Lipids were extracted and phospholipids (PLs) were separated using the solid phase extraction technique, then transesterified and assayed by gas-liquid chromatography.
RESULTS:
Saturated fatty acids (FAs) did not change significantly with age; mono- and bi-unsaturated FAs decreased in the liver and heart, and the ratio of the former to the latter increased in the liver, kidney and heart. PUFAs increased in the liver and heart. As regards individual FAs, 20:1(n-9) decreased in all organs, 14:1 and 18:1(n-7) increased in the kidney and heart, 18:1(n-9) increased in the kidney, 20:2(n-6), 18:2(n-6) and 22:5(n-3) decreased in the liver and heart, 20:3(n-6) decreased in the kidney and increased in the heart. The most abundant PUFAs, 20:4(n-6) and 22:6(n-3), either remained the same or increased with age. The N-9 family increased in the kidney, the N-7 family increased in the kidney and heart, the N-6 family decreased in all three organs, and the N-3 family increased in the liver and kidney. Dietary restriction (DR) significantly counteracted most of these changes, but changes in some FAs [20:2(n-6) in the heart] were magnified by DR and may not be age-related.
CONCLUSIONS:
Most age-related changes (that occurred in the rat liver, kidney and heart and were counteracted by the two different types of DR) may be involved in the mechanism of aging.

Posted in General.

Tagged with , , , , , , , , , , , , , .


Ray Peat, PhD on Endotoxin

Also see:
Bowel Toxins Accelerate Aging
Ray Peat, PhD on the Benefits of the Raw Carrot
Protective Cascara Sagrada and Emodin
Fermentable Carbohydrates, Anxiety, Aggression
Protective Bamboo Shoots
Endotoxin-lipoprotein Hypothesis
Endotoxin: Poisoning from the Inside Out
Protection from Endotoxin
How does estrogen enhance endotoxin toxicity? Let me count the ways.
Estrogen, Endotoxin, and Alcohol-Induced Liver Injury
Alcohol Consumption – Estrogen and Progesterone In Women
Autoimmunity and Intestinal Flora
Hypothyroidism, Intestinal Bacterial Overgrowth, & Lactose Intolerance
Estrogen, Endotoxin, and Alcohol-Induced Liver Injury
Protective “Essential Fatty Acid Deficiency”
PUFA and Liver Toxicity; Protection by Saturated Fats
Can Endurance Sports Really Cause Harm? The Lipopolysaccharides of Endotoxemia and Their Effect on the Heart

“The maladaptive sequence, starting from stress or hypothyroidism, would typically involve increased absorption of endotoxin, leading to interference with mitochondrial respiration, a shift to fat oxidation, inflammation, and the increase of a wide range of stress hormones. Each of these happens to interfere with the production of progesterone, leading to increased LH.”

“The liver is the major source of the acute phase proteins, and it is constantly burdened by toxins absorbed from the bowel; disinfection of the bowel is known to accelerate recovery from stress.”

“It takes a few days for the intestine to adjust to raw carrot, but the indigestible fiber is very protective for the intestine. Boiled bamboo shoots, which are also mostly indigestible, have a similar effect. These fibers prevent the reabsorption of estrogen in the intestine, and can shift the balance away from cortisol and estrogen, toward progesterone and thyroid, in just a few days of regular use. Oatmeal and potatoes do provide fiber, but they are good food for bacteria, and bacterial endotoxin is usually the basic problem causing hormone imbalance, by being a chronic burden for the liver, keeping it from storing enough sugar to process thyroid and the other hormones effectively.”

“The mitochondria are responsible for the efficient production of energy needed for the functioning of complex organisms, and especially for nerves. The enzyme in the mitochondria that reacts directly with oxygen, and that is often rate limiting, is cytochrome oxidase.

This enzyme is dependent upon the thyroid hormone and is inhibited by nitric oxide, carbon monoxide, estrogen, polyunsaturated fatty acids, serotonin, excess or free iron, ionizing radiation, and many toxins, including bacterial endotoxin. Red light, which passes easily through the tissues, reactivates the enzyme, which slowly loses its function during darkness.

Estrogen impairs the mitochondria in multiple ways, including blocking the function of cytochrome oxidase, decreasing the activity of ATP synthase, increasing heme oxygenase which produces carbon monoxide and free iron, damaging mitochondrial DNA, and shifting metabolism from glucose oxidation to fat oxidation, especially by inhibiting pyruvate dehyrogenase complex. These changes including the loss of cytochrome oxidase, are seen in the Alzheimer’s brain. The fact that this kind of energy impairment can be produced by estrogen doesn’t imply that estrogen is the cause, since many other things can cause similar effects–radiation, aluminum, endotoxin, for example.”

“When estrogen overlaps with endotoxin (as it tends to do), multiple organ failure is the result.”

“Hyperventilation is present in hypothyroidism, and is driven by adrenalin, lactate, and free fatty acids. Free fatty acids and lactate impair glucose use, and promote edema, especially in the lungs. Edema in the lungs limits oxygen absorption. Swelling of the brain, resulting from increased vascular permeability and the entry of free fatty acids, reduces its circulation and oxygenation; lactic acidemia causes swelling of glial cells. Swelling of the endothelium increases vascular resistance by making the channel narrower, eventually affecting all organs. Cells of the immune system release tumor necrosis factor and other inflammatory cytokines, and the bowel becomes more permeable, allowing endotoxin and even bacteria to enter the blood. Endotoxin impairs mitochondria, increases estrogen levels, causes Kupffer cells in the liver to produce more tumor necrosis factor, etc. Despite its name, tumor necrosis factor stimulates the growth and metastasis of some types of cancer. Dilution of the body fluids, which occurs in hypothyroidsim, hyperestrogenism, etc., stimulates tumor growth.”

“The saturated fats, in themselves, seem to have no “signalling” functions, and when they are naturally modified by our desaturating enzymes, the substances produced behave very differently from the plant-derived “eicosanoids.” As far as their effects have been observed, it seems that they are adaptive, rather than dysadaptive. All of the factors that affect the brain of a fetus should be examined in relation to the aging brain. Besides estrogen and fats, I am thinking of oxygen and carbon dioxide, glucose, iron and calcium, cholesterol, progesterone, pregnenolone, DHEA, the endorphins, GABA, thyroid, and vitamin A. An additional factor, endotoxin poisoning, eventually tends to intervene during stress and aging, exacerbating the trend begun under the influence of the other factors.”

“Endotoxin: Antimitochondrial action, causes elevation of estrogen. It synergizes with unsaturated fats, and naloxone opposes some of its toxic effects.”

“A “deficiency” of polyunsaturated fatty acids leads to altered rates of cellular regeneration and differentiation, a larger brain at birth, improved function of the immune system, decreased inflammation, decreased mortality from endotoxin poisoining, lower susceptibility to lipid peroxidation, increased basal metabolic rate and respiration, increased thyroid function, later puberty and decreases other signs of estrogen dominance. When dietary PUFA are not available, the body produces a small amount of unsaturated fatty acid (Mead acids), but these do not activate cell systems in the same way that plant-derived PUFAs do, and they are the precursors for an entirely different group of prostaglandins.”

“The absence of cancer on a diet lacking unsaturated fats, the increased rate of metabolism, decreased free radical production, resistance to stress and poisoning by iron, alcohol, endotoxin, alloxan and streptozotocin, etc., improvement of brain structure and function, decreased susceptibility to blood clots, and lack of obesity and age pigment on a diet using coconut oil rather than unsaturated fats, indicates that something very simple can be done to reduce the suffering from the major degenerative diseases, and that it is very likely acting by reducing the aging process itself at its physiological core.”

“In the bowel, the capillary malfunction increases the absorption of endotoxin, which intensifies the systemic energy problem. (Polyunsaturated oils, especially fish oil, damage the bowel capillaries, allowing more endotoxin to be absorbed.)”

“The amyloids and lipoproteins are powerfully responsive to bacterial endotoxin, LPS, and their structural feature that binds it, the “pleated sheet” structure, appears to also be what allows the amyloids to form amorphous deposits and fibrils under some circumstances. Our innate immune system is perfectly competent for handling our normal stress induced exposures to bacterial endotoxin, but as we accumulate the unstable fats, each exposure to endotoxin creates additional inflammatory stress by liberating stored fats. The brain has a very high concentration of complex fats, and is highly susceptible to the effects of lipid peroxidative stress, which become progressively worse as the unstable fats accumulate during aging.”

“By some tests, the “prion” resembles the LPS endotoxin. One of the interesting developments of the prion theory is that a particular structure that appears when the prion becomes toxic, the “beta pleated sheet,” is also a feature of most of the normal proteins that can form amyloid, and that this structure is directly related to binding and eliminating the bacterial LPS. If the prion theory is correct about the conversion of a normal protein into the pleated sheet, it isn’t necessarily correct about the incurability of the condition. The innate immune system should be able to inactivate the prion just as it does the bacterial endotoxin, if we remove the conditions that cause the innate immune reaction to amplify the inflammation beyond control.”

“We are all subject to a variable degree of inflammatory stimulation from the endotoxin absorbed from the intestine, but a healthy liver normally prevents it from reaching the general circulation, and produces a variety of protective factors. The HDL lipoprotein is one of these, which protects against inflammation by binding bacterial endotoxins that have reached the bloodstream. (Things that increase absorption of endotoxin–exercise, estrogen, ethanol–cause HDL to rise.) Chylomicrons and VLDL also absorb, bind, and help to eliminate endotoxins. All sorts of stress and malnutrition increase the tendency of endotoxin to leak into the bloodstream. Thyroid hormone, by increasing the turnover of cholesterol and its conversion into the protective steroids, is a major factor in keeping the inflammatory processes under control.”

“Endotoxin formed in the bowel can block respiration and cause hormone imbalances contributing to instability of the nerves, so it is helpful to optimize bowel flora, for example with a carrot salad; a dressing of vinegar, coconut oil and olive oil, carried into the intestine by the carrot fiber, suppresses bacterial growth while stimulating healing of the wall of the intestine. The carrot salad improves the ratio of progesterone to estrogen and cortisol, and so is as appropriate for epilepsy as for premenstrual syndrome, insomnia, or arthritis.”

“TNF is produced by endotoxin, and estrogen increases the amount of endotoxin in the blood. Even without endotoxin, though, estrogen can stimulate the production of TNF. Lactic acid and unsaturated fats and hypoxia can stimulate increased formation of TNF. Estrogen increases production of nitric oxide systemically, and nitric oxide can stimulate TNF formation. How does TNF work, to produce tissue damage and wasting? It causes cells to take up too much calcium, which makes them hypermetabolic before it kills them. It increases formation of nitric oxide and carbon monoxide, blocking respiration. TNF can cause a 19.5 fold increased in the enzyme which produces carbon monoxide (Rizzardini, et al., 1993), which blocks respiration.”

“The relatively few studies of fish oil and linoleic acid that compare them with palmitic acid or coconut oil have produced some very important results. For example, pigs exposed to endotoxin developed severe lung problems (resembling “shock lung”) when they had been on a diet with either fish oil or Intralipid (which is mostly linoleic acid, used for intravenous feeding in hospitals), but not after palmitic acid (Wolfe, et al., 2002).”

“Carrageenan enters even the intact, uninflamed gut, and damages both chemical defenses and immunological defenses. When it has produced inflammatory bowel damage, the amount absorbed will be greater, as will the absorption of bacterial endotoxin. Carrageenan and endotoxin synergize in many ways, including their effects on nitric oxide, prostaglandins, toxic free radicals, and the defensive enzyme systems.

The continuing efficient production of energy is a basic aspect of metabolic defense, and this is interrupted by carrageenan and endotoxin. The energy failure becomes part of a vicious circle, in which permeability of the intestine is increased by the very factors that it should exclude.”

“On a typical diet, tissues progressively accumulate linoleic acid, and this alters the structure of mitochondrial cardiolipin, which governs the response of the mitochondrial enzymes to the thyroid hormone. This process is especially evident in the female liver. In the “autoimmune” diseases, such as lupus, there are typically antibodies to cardiolipin, as if the body were trying to reject its own tissues, which have been altered by the storage of linoleic acid. The altered mitochondrial function, which is involved in so many symptoms, can become part of a vicious circle, with endotoxin and estrogen having central roles, once the stage has been set by the combination of diet, stress, and toxins.”

“The premenstrual estrogen-dominance usually leads progressively to higher prolactin and lower thyroid function. Estrogen is closely associated with endotoxinemia, and with histamine and nitric oxide formation, and with the whole range of inflammatory and “autoimmune” diseases. Anything that irritates the bowel, leading to increased endotoxin absorption, contributes to the same cluster of metabolic consequences.”

“Incidental stresses, such as strenuous exercise combined with fasting (e.g., running or working before eating breakfast) not only directly trigger the production of lactate and ammonia, they also are likely to increase the absorption of bacterial endotoxin from the intestine. Endotoxin is a ubiquitous and chronic stressor. It increases lactate and nitric oxide, poisoning mitochondrial respiration, precipitating the secretion of the adaptive stress hormones, which don’t always fully repair the cellular damage.”

“The toxic mechanism of bacterial endotoxin (lipopolysaccharide) involves inappropriate stimulation (Wang and White, 1999) of cells, followed by inflammation and mitochondrial inhibition. The stimulation seems to be a direct “biophysical” action on cells, causing them to take up water (Minutoli, et al., 2008), which is especially interesting, since estrogen’s immediate excitatory effect causes cells to take up water.

Hypoosmolarity itself is excitatory and anabolic. It stimulates lipolysis and fat oxidation (Keller, et al. 2003), and osmotic swelling stimulates glycolysis and inhibits mitochondrial respiration (Levko, et al., 2000). Endotoxin causes hyponatremia (Tyler, et al., 1994), and a hypertonic salt solution is protective, lactate solutions are harmful. Other stresses and inflammations also cause hyponatremia.

One of the effects of endotoxin that leads to prolonged cellular excitation is its inhibition of the glucuronidation system (Bánhegyi, et al., 1995), 1995), since this inhibition allows excitatory estrogen to accumulate.

In women and rats, antibiotics were found to cause blood levels of estrogen and cortisol to decrease, while progesterone increased. This effect apparently resulted from the liver’s increased ability to inactivate estrogen and to maintain blood sugar when the endotoxin stress was decreased.

Now that hog farmers’ use of antibiotics to stimulate growth has been discouraged, they have sought vegetables that have a natural antibiotic effect, reducing the formation and absorption of the intestinal toxins. The human diet can be similarly adjusted, to minimize the production and absorption of the bacterial toxins.”

“Bacteria thrive on starches that aren’t quickly digested, and the bacteria convert the energy into bulk, and stimulate the intestine. (But at the same time, they are making the toxins that affect the hormones.)”

“Since endotoxemia can produce aerobic glycolysis in an otherwise healthy person (Bundgaard, et al., 2003), a minimally “Warburgian” approach– i.e,, a merely reasonable approach–would involve minimizing the absorption of endotoxin. Inhibiting bacterial growth, while optimizing intestinal resistance, would have no harmful side effects. Preventing excessive sympathetic nervous activity and maintaining the intestine’s energy production can be achieved by optimizing hormones and nutrition. Something as simple as a grated carrot with salt and vinegar can produce major changes in bowel health, reducing endotoxin absorption, and restoring constructive hormonal functions.”

“Chronic constipation, and anxiety which decreases blood circulation in the intestine, can increase the liver’s exposure to endotoxin. Endotoxin (like intense physical activity) causes the estrogen concentration of the blood to rise. Diets that speed intestinal peristalsis might be expected to postpone menopause. Penicillin treatment, probably by lowering endotoxin production, is known to decrease estrogen and cortisone, while increasing progesterone. The same effect can be achieved by eating raw carrots (especially with coconut oil/olive oil dressing) every day, to reduce the amount of bacterial toxins absorbed, and to help in the excretion of estrogen. Finally, long hours of daylight are known to increase progesterone production, and long hours of darkness are stressful. Annually, our total hours of day and night are the same regardless of latitude, but different ways of living, levels of artificial illumination, etc., have a strong influence on our hormones. In some animal experiments, prolonged exposure to light has delayed some aspects of aging.”

“Besides being an ecologically favorable source of calcium, protein, sugar, and fat, the composition of milk causes it to be digested efficiently, supporting the growth of bacteria that are relatively safe for the intestine and liver, and reducing the absorption of endotoxin.”

“Animals that lack the unsaturated fatty acids have a higher metabolic rate and ability to use glucose, converting it to CO2 more readily, have a greater resistance to toxins (Harris, et al., 1990; even cobra venom: Morganroth, et al., 1989), including endotoxin (Li, et al., 1990)– preventing excessive vascular leakage–and to immunological damage (Takahashi, et al., 1992), and to trauma, and their neuromuscular response is accelerated while fast twitch muscles are less easily fatigued (Ayre and Hulber, 1996).”

“During pregnancy, the reduced blood volume doesn’t adequately nourish and oxygenate the growing fetus, and the reduced circulation to the kidneys causes them to release a signal substance (renin) that causes the blood to circulate faster, under greater pressure. A low salt diet is just one of the things that can reduce kidney circulation and stimulate renin production. Bacterial endotoxin, and other things that cause excessive capillary permeability, edema, or shock-like symptoms, will activate renin secretion.”

“Endotoxin, produced by bacteria, mainly in the intestine, disrupts energy production, and promotes maladaptive inflammation. The wide spectrum of benefit that iodide has, especially in diseases with an inflammatory component, suggests first that it protects tissue by blocking free radical damage, but it also suggests the possibility that it might specifically protect against endotoxin.”

“Serotonin, an important mediator of stress, shock, and inflammation, is a vasoconstrictor that impairs circulation in a great variety of circumstances.

Stress impairs metabolism, and serotonin suppresses mitochondrial energy production.

Stress and shock tend to increase our absorption of bacterial endotoxin from the intestine, and and endotoxin causes the release of serotonin from platelets in the blood.”

“A very important form of prenatal stress occurs in toxemia and preeclampsia, in which estrogen is dominant, and endotoxin and serotonin create a stress reaction with hypertension and impaired blood circulation to the uterus and placenta.”

“Therapies that have been successful in treating schizophrenia include penicillin, sleep therapy, hyperbaric oxygen, carbon dioxide therapy, thyroid, acetazolamide, lithium and vitamins. These all make fundamental contributions to the restoration of biological energy. Antibiotics, for example, lower endotoxin formation in the intestine, protect against the induction by endotoxin of serotonin, histamine, estrogen, and cortisol. Acetazolamide causes the tissues to retain carbon dioxide, and increased carbon dioxide acidifies cells, preventing serotonin secretion.”

“When animals have been “deprived” of the EFA during gestation and nursing, and then given a standard diet, they develop larger bones, with a thicker cortex and more trabecular bone, both of which would suggest a lower level of stress. Many types of inflammation and stress are significantly reduced in “EFA deficient” animals. Inflammation caused by the injection of carrageenan is decreased, partly because of the absence of prostaglandins in these animals. The absence of the EFA protects against colitis and nephritis. The kidneys are more effective in several ways in the deficient animals.

Shock, caused by the injection of endotoxin, which is 100% lethal to normally fed animals, is only 24% lethal to the deficient animals.”

“Another process with potentially deadly results that increase with aging and stress, is the passage of bacteria from the intestines into the blood stream.”

“Aging and stress increase some of the inflammatory mediators, tending to reduce the barrier function of the bowel, letting larger amounts of bacterial toxins enter the bloodstream, interfering with energy metabolism, creating inflammatory vicious circles of increasing leakiness and inflammation.”

“The gerontologist, V.V. Frolkis, recently found that mice lived 43% longer than animals on the standard diet when they periodically had activated charcoal added to their food. This is the clearest evidence I have seen that “bowel toxins” make a major contribution to the aging process.”

“Bacterial endotoxin inhibits mitochondrial respiration, and this respiration is needed for the intramitochondrial conversion of cholesterol into pregnenolone. With aging, pregnenolone and its derivatives, progesterone and DHEA, decline sharply. The brain, the organ with the highest concentration of those stabilizing substances, has many systems for adapting to their decreasing concentration, but the immune system is probably less able to compensate for those aging changes.”

“In the last century, it was observed that digitoxin (a natural steroid derivative) lowered the fever caused by enteritis. This is probably another example of a catatoxic function, a protective function common to many steroids, and probably worked by way of stabilizing the detoxifying enzymes and preventing the absorption of endotoxin. Endotoxin is known to destabilize and inactivate the bowel’s detoxifying enzymes, just as an overdose of cortisol does.”

“Bacterial toxins, whether produced in the intestine or in the manufacture of food supplements, pass through the wall of the intestine in larger amounts in stress, malnutrition, and old age. Endotoxin suppresses mitochondrial respiration, and tends to produce a shock-physiology similar to that produced by endogenous hormones. I have mentioned before that I think endotoxin can be involved in the premenstrual syndrome, and I think it might even be involved in some breast syndromes.”

“In aging, stress, and malnutrition, the barrier function of the intestine is weakened.”

“Two features of mitochondrial damage in severe stress (regardless of whether endotoxin is involved) are a depletion of the antioxidant reserves, and loss of the ability to convert cholesterol into the protective steroid hormones. Mitochondrial damage is more likely in hypothyroidism, as I have discussed previously; thyroxin inhibits lipid peroxidation, end it tends to be inversely related to adrenalin, preventing or minimizing “catecholamine toxicity,” for example. Beans and lentils happen to be powerful anti-thyroid agents, so it isn’t surprising to see indications of decreased aerobic capacity, resulting from decreased peak oxygen consumption in association with the chronic fatigue syndrome (CFS), if that syndrome is caused by chronic exposure to dietary legumes.”

“One aspect of taxol research might advance our understanding of the body’s defenses against cancer. It happens that taxol, like bacterial endotoxin, stimulates macrophages to secrete tumor necrosis factor (TNF). This knowledge might lead to an insight into the nature of the process that controls TNF, and how that process fits into nonnal immunity. Promoting the body’s natural immunity, combined with reducing our exposure to cancer-causing factors, should have higher priority in the health sciences, but the power of the drug industry focuses attention on the idea of medically killing cancer cells.”

“Endotoxin or other material absorbed from intestinal bacteria contributes to a variety of autoimmune problems, including thyroiditis (Penhale and Young, 1988). Combining an indigestible fiber, such as raw carrot, with mild germicides, such as vinegar and coconut oil, can improve the hormonal environment, while reducing the immunological burden.”

“Estrogen and PUFA create insulin resistance, and the resulting state of “diabetes” and stress de-energizes tissues, with the mitochondria that are damaged by unsaturated fatty acids, nitric oxide, tumor necrosis factor (TNT), serotonin, etc., failing to meet the tissues’ energy needs. Stress, endotoxinemia, and increased estrogen tend to activate TNF, which has a role in brain degenerative diseases and osteoporosis and multiple organ failure.”

“Systemic metabolic problems make local problems worse, and if a local injury is serious, it can cause the liver to produce stress-related proteins called “acute phase proteins,” including fibrinogen and serum amyloids A and P, C-reactive protein, and other inflammation-related proteins. These proteins are a primitive sort of immune system, that· can directly bind to some harmful substances. Endotoxin absorbed from bowel bacteria is probably the commonest reason for increased production of these proteins. The acute phase proteins contribute to the development of tumors in various ways. For example fibrinogen degradation products are pro-inflammatory. Although these are called acute phase proteins, they sometimes might better be called chronic inflammation proteins, since they are associated with diabetes, cancer, and heart disease.”

“The stress response is self-sustaining on several levels. For example, stress increases the absorption of bacterial endotoxin from the intestine, which increases the estrogen level and synergizes with biliverdin and cortisol.”

“Estrogen is now known to increase with athletic stress, trauma, sickness, endotoxin poisoning, etc., and to be an essential factor in prostate cancer, as well as all other cancers, so it doesn’t seem to be such a big step to go from “stress hormone” to “age hormone.” Estrogen is beginning to lose its false identity as the “female hormone,” which was always just a promotional concept of the pharmaceutical industry. Hundreds of false claims have been made about estrogen’s “youth promoting” effects, but they always turn out to be the opposite of what is claimed. For example, “estrogen increases the collagen content of skin,” but in fact collagen accumulation is characteristic of aging, radiation injury, and-many other types of damage. ”Estrogen makes the skin plumper,” but it is by causing water retention; bloating might stretch wrinkly skin until it is smooth, or even tight, but a swollen old face is, if anything, biologically older than a lean and creased face. (I have discussed many other such advertising ploys in my books, e.g., From PMS to Menopause: Hormones in Context.)”

“One of the factors promoting excess cortisol production is intestinal irritation, causing absorption of endotoxin and serotonin. Fermentable fibers (including pectins and fructooligosaccharides) support the formation of bacterial toxins, and can cause animals to become anxious and aggressive. Fed to horses, some types of fiber increase the amount of serotonin circulating in the blood. Grains, beans, and other seeds contain fermentable fibers that can promote intestinal irritation. The liver has several ways to detoxify endotoxin and serotonin, but these can fail as a result of poor nutrition and hypothyroidism.”

“Besides the direct effects of endotoxin and fatty acids, endotoxin’s activation of prostaglandins and nitric oxide contribute to the metabolic shift toward inflammation and away from efficient oxidation of glucose.”

“Just friction, or scratching or stretching the intestine is enough to cause it to release serotonin into the bloodstream. Serotonin increases the permeability of the intestine and blood vessels, and so is likely to be a major cause of the absorption of endotoxin (and other harmful material) during intestinal irritation or stress. The biological meaning of serotonin might be very different without endotoxin, but that hasn’t been investigated.

Bacterial endotoxin increases serotonin release from the intestine, and increases its synthesis in the brain (Nolan, et al., 2000) and liver (Endo, 1983). It also stimulates its release from platelets, and reduces the lungs’ ability to destroy it. The formation of serotonin in the intestine is also stimulated by the lactate, propionate and butyrate that are formed by bacteria fermenting fiber and starch, but these bacteria also produce endotoxin. The inflammation-producing effects of lactate, serotonin, and endotoxin are overlapping, additive, and sometimes synergistic, along with histamine, nitric oxide, bradykinin, and the cytokines.

There have been some studies showing that bacterial fermentation in the intestine can cause many symptoms, including behavioral changes.

For example, a diet of soy protein increases aggression in monkeys (Simon, et al., 2004) and chickens (McKeegan, et al., 2001).

When various fermentable carbohydrates were fed to rats, they became anxious and agressive, and these changes in behavior corresponded to the fermentation of these materials by bacteria in the lower intestine, with the production of lactic acid (Hanstock, et al., 2003, 2004).”

“Defensive aggression is probably a response intermediate between fearful giving up and confident achievement. When a rat is restrained, held down on its back, it quickly develops ulcers, but if it has a stick to bite, it is very resistant to the formation of the ulcers. The ability to do something with a defensive meaning prevents the excessive production of serotonin and its consequences, such as increased production of cortisol and other stress hormones, and disturbance of cirulation and energy production. Endotoxin and prostaglandins activate these same systems, and progesterone and aspirin are among the protective factors that can oppose those effects.”

“Chronically elevated cortisol is commonly seen in depressed people, but giving a supplement of cortisol is effective in relieving depression. Both cortisol and the pituitary corticotropic hormone that stimulates its production, ACTH, have some antidepressant effects, and they inhibit the hypothalamic corticotropin release hormone, CRH. CRH is more directly associated with depression than cortisol is, and it by itself activates many inflammatory processes, including the release of histamine, cytokines, and nitric oxide. CRH is promoted in the hypothalamus (and in many other tissues) by inflammation, endotoxin, serotonin, interleukins, and prostaglandins, but also by the perception of unavoidable difficulties.

Besides cortisol, progesterone and androgens are internal factors that decrease the activity of CRH. Estrogen and hypothyroidism increase its activity.”

“The excessive stimulation of a cell increases its internal alkalinity, causing it to take up more water. The mediators of inflammation, such as CRH, serotonin, and endotoxin cause cell swelling and increased alkalinity. CRH and endotoxin can increase the susceptibility to seizures, but they can also block the ability of cells to respond to normal stimulation.”

“If the internal and external causes of stress converge, additively, on the cell’s internal communication and integration system, then the basic resistance of the organism to stress can be increased by any of the factors which oppose the signals of stress.

Carbon dioxide, progesterone, and thyroid act on many of the factors that interfere with our ability to handle stress constructively. A diet that reduces fermentation and endotoxin, with an abundance of calcium–fruit, milk, and cheese, for example–can help to shift the balance away from lactic acid, estrogen, and serotonin, toward carbon dioxide, progesterone, and thyroid.”

“One nearly ubiquitous source of inappropriate excitation and energy depletion is the endotoxin, bacterial lipopolysaccharides absorbed from the intestine (Wang and White, 1999). That this ubiquitous toxin has a role in rosacea is suggested by the observation that intestinal stimulation, to speed transit through the bowel, immediately relieved symptoms (Kendall, 2002). Increased cortisol (Simon, et al., 1998) and sepsis (Levy, 2007) interfere with mitochondrial energy production.”

“Lactate, glutamate, ammonium, nitric oxide, quinolinate, estrogen, histamine, aminolevulinate, porphyrin, ultraviolet light, polyunsaturated fatty acids and endotoxin contribute to e.xcitatory and excitotoxic processes, vasodilation, angioneogenesis, and fibrosis.

Carbon dioxide, glycine, GABA, saturated fatty acids (for example, Nanji, et al., 1997), vitamin K, coenzyme Q10, niacinamide, magnesium, red light, thyroid hormone, progesterone, testosterone, and pregnenolone are factors that can be increased to protect against inappropriate cellular excitation.”

“Some of the benefit from antibiotics probably results from the reduced endotoxin stress when intestinal bacteria are suppressed. However, antibiotics can kill the intestinal bacteria that produce vitamin K, so it’s important to include that in the diet when antibiotics are used.

Some fibers, such as raw carrots, that are effective for lowering endotoxin absorption also contain natural antibiotics, so regular use of carrots should be balanced by occasional supplementation with vitamin K, or by occasionally eating liver or broccoli.”

“Polyunsaturated fatty acids, derived from foods, have a special role in the immune system, intensifying the effects of stress (cholesterol newsletter, September, 2005) in killing lymphocytes, and blocking the proliferative response of thymic cells (Rotondo, et aI., 1994). They tend to shift immune functions from cellular immunity to humoral (antibody) immunity, and this pattern predisposes to autoimmunity. They are probably directly toxic to the liver (Ritskes-Hoitinga, 1998). DHA increases the leakiness of the bowel, allowing more endotoxin to enter the circulation (RoigPerez, et al., 2004).”

“The rate of cholesterol production, and the amount in circulation, tend to be inversely related to systemic inflammation. All of the types of lipoprotein absorb, bind, and help to eliminate endotoxin, for example. Carbon dioxide and the major steroids stabilize cells against excessive stimulation, and protect the cell structure.

Bacteria and plants produce a variety of lipids that serve some purposes analogous to our cholesterol and phospholipids. Some of the common intestinal bacteria produce a molecule containing amino sugars and fatty acids (lipopolysaccharide, LPS), that’s called endotoxin. The “endo” root distinguishes it from the “exotoxins” secreted by some bacteria, because the endotoxin is a structural part of the bacterium, that protects the bacterium against some of the exotoxins produced by other microorganisms. Normally, our intestine and liver destroy most of the LPS endotoxin before it reaches the general circulation. The bile acids, a major end product of cholesterol, have a detergent action in the intestine that usually keeps endotoxin in solution, away from the absorptive surfaces of the intestine. If the flow of bile is obstructed, endotoxin is allowed to enter the system (Bertok, 2004). Estrogen can inhibit the flow of bile (Stieger, et aI., 2000). A mucus lining is part of the protective barrier, but the microscopic integrity of the intestinal cells themselves finally regulates the passage of materials into the blood and lymphatic vessels.

The barrier function of the intestine is weakened by poisons, malnutrition, and the reduced circulation that can result from stress. Estrogens, such as oral contraceptives or Premarin, can cause colitis by shutting off the blood supply (Gurbuz, et aI., 1994; Deana and Dean, 1995).

When our cells are exposed to LPS, they produce many of the same reactions that they would produce in response to our endogenous phospholipids. The major proteins that interact with cholesterol contain lipophilic regions called beta sheets, in which a relatively flat surface is formed by parallel strands of the protein. LPS contains a group of fatty acids bound together by the polysaccharide, that strongly binds to these proteins.

The alarm reaction produced either by damage of some of our own tissue or by the entrance of LPS into the circulation can, under ideal circumstances, lead to a series of protective and defensive reactions, that resolve the problem. The production of steroids is increased, and, early in life, the liberation of fatty acids itself can contribute to the antiinflammatory processes that restore the barrier function and energy production. But when the endogenous omega-9 fatty acids have been thoroughly displaced by dietary omega-6 and omega -3 fatty acids, the systemic release of fatty acids becomes an amplifier of the stress state initiated by injury or other stress. The liver, for example, decreases its detoxification of estrogen in the presence of polyunsaturated fatty acids.

In the ovary and uterus, the healthy alternation of excitation and quiescence usually continues for many years, and in rodents it often ends in a state of “persistent estrus,” in which the excitatory state can’t be terminated in the usual way, by the production of progesterone. In humans, menopause is analogous, because the excitatory FSH hormone from the pituitary becomes excessive, with the ovary continuing to produce estrogen but failing to produce progesterone, sometimes with the pituitary failing to shift from FSH to LH. In rodents, it’s recognized that persistent estrus is caused by chronically elevated estrogen, but in humans there has been tremendous resistance to the recognition of estrogen’s central role in menopause and senescence. An excess of the basic promoter of inflammation, serotonin, which is closely associated with estrogen’s influence, can have similar effects on the reproductive cycle (Cooper, et al., 1986). The industry has devoted the necessary funding to making the easily manipulated medical culture, and the public, believe the opposite, i.e., that reproductive aging is mainly caused by estrogen deficiency.

The liver, besides its important role in keeping endotoxin from reaching the circulation, normally “destroys” all of the estrogen that reaches it, that is, it makes it water soluble so that it will be excreted in the urine or bile, rather than being retained by cells. But in malnutrition, hypothyroidism, or stress, the liver allows estrogen to pass through without being completely inactivated. M.S. Biskind and G.R. Biskind (1941, 1946) showed that the B vitamins were crucial for estrogen elimination, and others around the same time demonstrated that toxins, protein deficiency, hypothyroidism, and even hyperestrogenism itself tended to reduce the liver’s ability to detoxify estrogen. Endotoxin’s inhibition of this detoxifying system (Banhegyi, et al., 1995) is just one of the ways that it increases estrogen systemically. Estrogen, which was named for a gadfly, is excitatory in all of its biological actions (including nervous excitation and cellular proliferation), and in most tissues this excitatory action has been shown to cause oxidation damage. Many different toxic changes have been produced in the liver by estrogen, but lipid peroxidation can be clearly demonstrated in the liver as an early reaction to subcutaneous estrogen injection (Gene, et al., 1999).

Endotoxin and estrogen interact in many interesting and potentially deadly ways. Both of them activate many of the same alarm systems, including phospholipases, nitric oxide synthase, tumor necrosis factor (TNF), interleukins (including IL-6, according to Bengtsson, et aI., 2004), and the enzymes that form prostaglandins from polyunsaturated fatty acids. Estrogen makes the toxic-mediator-producing cells in the liver (Kupffer cells) hypersensitive to LPS–15 times more sensitive than normal (Ikejima, et al., 1998). One way estrogen increases the toxicity of endotoxin is probably by making the intestine more permeable (Enomoto, et al., 1999). The acute phase reaction, a process in which the liver decreases its production of albumin and increases the production of serum amyloids, lipoproteins, and fibrinogen, is promoted by both estrogen and endotoxin. Estrogen (like endotoxin) activates nuclear factor kappa-B (Shyamala and Guiot, 1992; Hamilton, et al., 2003), which activates cells to produce TNF, nitric oxide, prostaglandins, and interleukins. A long series of observations have indicated that estrogen’s main effects begin with redox changes in the mitochondria, and recent evidence (Felty and Roy, 2005) shows that oxidative free radicals produced in the mitochondria by estrogen induce NF kappa-B. Old age is associated with increased activity of NF kappa-B.”

“The amount of injury needed to increase the endotoxin in the blood can be fairly minor. Two thirds of people having a colonoscopy had a significant increase in endotoxin in their blood, and intense exercise or anxiety will increase it. Endotoxin activates the enzyme that synthesizes estrogen while it decreases the formation of androgen (Christeff, et aI., 1992), and this undoubtedly is partly responsible for the large increases in estrogen in both men and women caused by trauma, sickness or excessive fatigue.

The positive interactions among estrogen and endotoxin and NF kappa-B, and their negative interactions with progesterone and testosterone, tend to “stabilize” the inflammatory condition. In a young person, good food, sunlight, and a high altitude can often overcome severe and progressive inflammatory conditions. In an older person, whose tissues contain larger amounts of polyunsaturated fats and their breakdown products, it takes more environmental support to get out of the inflammatory pattern.”

“The liver’s important role in regulating endotoxin and estrogen, and the cascade of inflammatory mediators that can be released as a result of a depression of the liver’s function, makes it important to keep the liver in mind, even when the immediate problem seems to be in the brain, the lungs, kidneys, pancreas, blood vessels, heart, eyes, prostate, ovaries, muscles, or any other organ.”

“The effects of endotoxin and estrogen on cells are additive, for example in causing vascular leakiness (e.g., Tollan, et al., 1992), even in the brain (Oztas and Kaya, 1998). Dementia, respiratory distress/shock lung, and all of the classical inflammatory conditions, are promoted by the simple process of making capillaries excessively permeable. But the cellular changes that make capillaries leaky, also affect other cells, changing their antigenicity, leading to “autoimmune” processes (Sekigawa, et aI., 2004).”

“Stress activates the endorphin system (partly by increased histamine, according to Kjaer, et aI., 1993), and these intrinsic hormones, like morphine and the other opiates, are pro-inflammatory. Both estrogen and endotoxin activate the endorphin system. Excessive exposure to estrogen destroys many of the betaendorphin nerves in the hypothalamus, resulting in an adaptive hypersensitivity, that maintains a chronic activation of the endorphin sensitive tissues, suppressing progesterone production (Desjardins, 1995).”

“The saturated fatty acids found in coconut oil inhibit the formation of histamine (Mimura, et al., 1980), as does glucose (Kaneko, et al., 1997), and prevent leakiness of the intestine, protecting the liver from endotoxin (Kono, et al., 2003). Progesterone and testosterone protect against histamine, while estrogen increases its formation and actions. Benadryl (diphenhydramine) protects the liver and other organs from various toxins, and from the toxic effects of histamine.”

“One of the roles of fat in the food is to stimulate the secretion of bile by the gall bladder. Besides that important function, saturated fats have a variety of protective, antiinflammatory effects, including the reduction of endotoxemia and lipid peroxidation (Nanji, et al., 1997). “Coconut oil completely abolished the responses to endotoxin” (Wan and Grimble, 1987).

Appetizing foods stimulate the digestive secretions, but it’s important to avoid foods that
directly trigger an inflammatory reaction, or that are indigestible and as a result support harmful bacterial growth. Cellulose can accelerate transit through the intestine and lower estrogen systemically (partly by simply preventing the reabsorption of estrogen that has been secreted by the bile), but the lignans found in many seeds and grains tend to promote inflammation. Raw carrots, for example, lower estrogen, while flax meal can increase it.

Constipation or diarrhea, or their alternation, usually develops when there is inflammation in the bowel. A laxative can sometimes reduce the inflammation, but it’s important to identify the foods that contribute to the problem. A salad of shredded carrot, with oil and vinegar dressing, has a germicidal action, and is stimulating to the digestive processes. Most salad vegetables, though, are likely to produce intestinal irritation, directly or as a result of bacterial decomposition.

One or a few of the anti-inflammatory measures can often make a tremendous difference, but for serious chronic problems, it’s best to use as many safe techniques as possible, including periodic breathing in a paper bag to increase carbon dioxide retention, and taking niacinamide to inhibit lipolysis, until the signs of inflammation begin to subside. Eventually, the goal should be to become “deficient” in the “essential fatty acids,” since experiments have shown that such animals are extremely resistant to endotoxin poisoning (Li, et al., 1990).”

“Other things that protect against excessive polyamines are procaine and other local anesthetics (Yuspa, et al., 1980), magnesium, niacin, vitamin A, aspirin, and, in some circumstances, caffeine. Since endotoxin stimulates the formation of polyamines, a diet that doesn’t initate the intestine is important. Tryptophan and methionine contribute to the formation of polyamines, so gelatin, which lacks those amino acids and is soothing to the intestine, should be a regular part of the diet.”

“Besides the systemic toxic effects of dietary polyunsaturated fats, those fats appear to be a major factor in making tissues susceptible to damage from immunological reactions, since the tissues of rats that are deficient in the “essential fatty acids” are not damaged by antibodies that would seriously injure or kill “normal” tissues. (Takahashi, et al., 1992; Schreiner, et al., 1988). These animals are also resistant to many toxins, including endotoxin.”

“Mechnikov was right in seeing bacterial toxins from the intestine as a cause of aging, and he was on the right track in trying to introduce a more beneficial bacterial ecology into the intestine by using sour milk. The lactobacilli do have some protective effects, but the lactic acid that they produce turns out to function as an alarm signal, which accelerates the same aging processes that the other bacterial endotoxins produce.”

“The recent renewal of interest in inflammation as a basic cause of chronic and degenerative disease, is a first step toward an integral therapeutic system, even though the systemic restorative processes are still being neglected.

Bacterial endotoxins are probably the central problem, but polyunsaturated fats, heavy metals, and extraneous hormones interact with them, extending their toxic actions.

Reducing the toxic factors, relative to the restorative factors, should be the aim, rather than looking for another drug.”

“To put their claims into context, it’s helpful to look at a variety of experiments
involving treatment with niacinamide. It protects nerves, vascular cells, insulin producing cells in the pancreas, and a variety of other types of cell from cell death produced by lack of oxygen, excitotoxicity, endotoxin, and a variety of stressors and toxins. (Niacinamide acts in many ways as a negation of resveratrol; for example, resveratrol interferes with the ability of the beta cells to secrete insulin [Szkudelski, 2007]).

Niacinamide protects mitochondrial respiration from many of the age-related factors that can damage mitochondria and decrease energy production. Lipopolysaccharide, the bacterial endotoxin, increases the production of the free radical nitric oxide, leading to the secretion of inflammatory mediators and the suppression of energy production by the mitochondria. These effects are blocked by niacinamide (Fukuzawa, et al., 1997). Calorie restriction also protects mitochondrial respiration, in yeasts (Lin, et al., 2002) and rats (Broderick, et al., 2002).”

“In the presence of bacterial endotoxin, respiratory energy production fails in the cells lining the intestine. Nitric oxide is probably the main mediator of this effect.”

“Some leakage from the lumen of the intestine or the lumen of a blood vessel can occur between cells, but it is often claimed that the “paracellular” route accounts for all leakage. (Anthraquinones may inhibit paracellular leakage [Karbach & Wanitschke, 1984].) When a cell is inflamed or overstimulated or fatigued, its cytoplasmic contents leak out. In that state, its barrier function is weakened, and external material can leak in. This was demonstrated long ago by Nasonov, but the “membrane” doctrine is incompatible with the facts, so the paracellular route is claimed to explain leakage. Since the cells that form the barrier begin to form regulatory substances such as nitric oxide when they are exposed to endotoxin, it is clear that major metabolic and energetic changes coincide in the cell with the observed leakiness. Permeability varies with the nature of the substance, its oil and water solubility, and the direction of its movement, arguing clearly that it isn’t a matter of mere holes between cells.

Besides endotoxin, estrogen, vibrational injury, radiation, aging, cold, and hypoosmolarity, increase NO synthesis and release, and increase cellular permeabilities throughout the body.

Estrogen excess (relative to progesterone and androgens), as in pregnancy, stress, and aging, reduces intestinal motility, probably by increasing nitric oxide production. The anthraquinones inhibit the formation of nitric oxide, which is constantly being promoted by endotoxin.”

“Many types of evidence indicate that environmental PUFA and prostaglandins produced from the “essential” fatty acids are required for inflammation to progress to degeneration. The n-9 polyunsaturated tatty acids (the kind we can make make from saturated fat or sugar) seems to be positively protective against inflammation. For example, rats fed a diet with 2% hydrogenated coconut oil for two weeks had lower levels of IL-6 and C-reactive protein than when a small amount of arachidonic acid and docosahexaenoic acid (DHA) were added. Mead acid (20:3n9) was lower in the group with the PUFA supplement, and the inflammatory reaction to endotoxin was greater in the supplemented group (Ling, et aI., 2012).

Many of the things that can he achieved by vaccination and treatment with safe anti-inflammatories such as aspirin could be done better by long-term changes of diet, and by taking into account the interactions of the hormones, especially progesterone, estrogen, and thyroid, with nutrients and stressors. But much more than than is needed: The nature of the relationships between environmental factors and the body’s reactions has to be clarified, so that the processes of healing and regeneration can more closely resemble the prenatal condition, possibly even continuing in adulthood the “pedomorphic” process, realizing human potentials that haven’t previously been seen.”

“We are susceptible to many things that interfere with energy production-the substitution of iron for copper in the respiratory enzyme, the absorption of endotoxin, the accumulation of PUFA, a deficiency of thyroid hormone, the formation of increased amounts of nitric oxide, serotonin, and histamine, etc. Different environments will condition the way the defensive mechanisms of inflammation are produced.”

“Endotoxin absorbed from the intestine is one of the ubiquitous stresses that tends to cause free radical damage. Fructose, probably more than glucose, is protective against damage from endotoxin.”

“Excitotoxins (including endotoxin) increase the formation of ncuroprostanes and isoprostanes (from n-3 and n-6 PDFA) (Milatovic, et al., 2005), and acrolein and other fragments, which inhibit the use of glucose and oxygen. DHA and EPA produce acrolein and HHE, which react with lysine groups in proteins, and modify nucleic acids, changing the bases in DNA.”

“Bacterial endotoxin causes some of the same effects as adrenalin. When stress reduces circulation to the bowel, causing injury to the barrier function of the intestinal cells, endotoxin can enter the blood, contributing to a shock state, with further impairment of circulation. In old age and in “winter sickness,” something like a chronic borderline state of shock can develop. Intravenous glucose has been used successfully to bring patients out of septic shock. The tonic effects of intravenous local anesthetics are, I think, largely the result of their ability to open the arterioles. Magnesium and vitamin A also have some ability to normalize blood vessel tone, and can help to maintain the barrier function of the bowel.”

“Penicillin has been found to relieve PMS, but the mechanism by which it increases progesterone and decreases estrogen and cortisone isn’t clear, and probably involves endotoxin and the liver.”

“Since progesterone tends to promote its own synthesis, it shouldn’t be necessary to keep using it, unless the ovaries have been removed, or the thyroid or cholesterol level is very low, or aging has damaged their ability to convert cholesterol to progesterone. While an excess of carotene can inhibit progesterone synthesis, a carrot salad (grated carrots, vinegar, coconut oil, and salt) can often help to normalize progesterone, apparently by protecting against intestinal absorption of bacterial endotoxin, and by helping to reduce the reabsorption of estrogen which has been excreted in the bile.

The beneficial hormonal effects that have been seen during antibiotic therapy (raising progesterone while lowering cortisol and estrogen) can be achieved safely with the carrot salad in most cases, without the possible toxic effects of the antibiotics.”

“Once we accept Warburg’s thesis, that damaged respiration is the prime cause of cancer, the therapeutic use of thyroid in cancer seems obvious. Aging and estrogen-dominance are other states in which cells seem to be relatively insensitive to thyroid hormones. (Unsaturated fats are involved in resistance to thyroid, and promote the incidence of cancer in a variety of ways.) If the liver is a main site of T4’s conversion to T3, cancer patients may require very large doses of thyroid hormone, or else direct use of T3 (possibly in large doses), since the liver is so likely to be inefficient. Incidentally, thyroid’s ability to improve digestion and peristalsis is important for liver function; endotoxin absorbed from the intestine can be a serious burden to the liver, and it is known to cause a large increase in the blood estrogen level.”

Posted in General.

Tagged with , , , , , , , , , , , , , , , , , , , , , , , , , , , , , .


PUFA Promote Stress Response; Saturated Fats Suppress Stress Response

Also see:
Sugar (Sucrose) Restrains the Stress Response
Saturated and Monousaturated Fatty Acids Selectively Retained by Fat Cells
Ray Peat, PhD on Low Blood Sugar & Stress Reaction
Low Blood Sugar Basics
Low Carb Diet – Death to Metabolism
Saturated and Monousaturated Fatty Acids Selectively Retained by Fat Cells
Anti-Inflammatory Omega -9 Mead Acid (Eicosatrienoic acid)
Protect the Mitochondria
Toxicity of Stored PUFA
Dietary PUFA Reflected in Human Subcutaneous Fat Tissue
Israeli Paradox: High Omega -6 Diet Promotes Disease
PUFA Accumulation & Aging
Unsaturated Fats and Longevity
Arachidonic Acid’s Role in Stress and Shock
“Curing” a High Metabolic Rate with Unsaturated Fats
Fat Deficient Animals – Activity of Cytochrome Oxidase
Benefits of Aspirin

Quotes by Ray Peat, PhD:
“Saturated fatty acids terminate the stress reactions, polyunsaturated fatty acids amplify them.”

“Free unsaturated fatty acids turn on the stress hormones, and cortisol blocks oxidation of sugar and turns it into fatty acids and triglycerides. Keeping cortisol and stress low is the main thing. Keeping a high ratio of calcium to phosphate helps to oppose the stress metabolism.”

“Unsaturated fatty acids, but not saturated fatty acids, are signals which activate cell systems.”

“In a young person, good food, sunlight, and a high altitude can often overcome severe and progressive inflammatory conditions. In an older person, whose tissues contain larger amounts of polyunsaturated fats and their breakdown products, it takes more environmental support to get out of the inflammatory pattern.”

“Heavy drinking inhibits cellular respiration and sets up an inflammatory process, involving iron, which will still be harmful, but less so than in the presence of PUFA. If absolutely none of the dietary PUFA were in the body, no one really knows what that metabolic stress would do, maybe nothing cumulative.”

“There is a growing recognition that a persistent increase of free fatty acids in the serum, which is seen in shock, heart failure, and aging, indicates a bad prognosis, but there is no generally recognized explanation for the fact that free fatty acids are harmful. I want to mention some evidence showing that it is the accumulation of polyunsaturated fats in the body that makes them harmful.”

“My argument here will be that some of our adaptive, protective regulatory processes are overridden by the excessive supply of unsaturated fats–supported by a few other toxins–in our diet, acting as a false-signal system, and that cholesterol, pregnenolone, and progesterone which are our main long-range defenses, are overcome by the effects of the unsaturated fats, and that the resulting cascade of ineffective and defective reactions (including various estrogen-stimulated processes) leads to lower and lower energy production, reduced function, and death. At certain times, especially childhood and old age, iron (which also has important regulatory roles) accumulates to the point that its signal functions may be inappropriate.”

“There are many energy-related vicious circles associated with aging, but the central one seems to be the fat-thyroid-estrogen-free-radical-calcium sequence, in which the ability to produce stabilizing substances including carbon dioxide and progesterone is progressively lost, increasing susceptibility to the unstable unsaturated fats.”

“The random production of free radicals, rather than acting only by way of genetic damage or protein cross-linking, is also able to act as a signalling process, that is, on a strictly physiological level. An excess of unsaturated fatty acids itself constitutes a massive distortion of the regulatory systems, but it also leads to distortions in the “eicosanoid” system and the increasingly uncontrolled production of free radicals, and to changes in energy, thyroid activity, and steroid balance. The aging body, rather than being like a car that needs more and more repairs until it collapses from simple wear, is more like a car traveling a road that becomes increasingly rough and muddy, until the road becomes an impassable swamp.”

“I’ve known people who were eating 2-3 pounds of meat a day and who were getting sicker and sicker as their free fatty acids and free amino acids increased. That started me reading more about the free state of fatty acids in the blood. Just about everything that goes wrong, involves free fatty acids increase. If they’re totally saturated fatty acids, such as from coconut oil and butter, those are less harmful, but they still tend to shift the mitochondrial cellular metabolism away from using glucose and fructose, and turning on various stress-related things (by lowering the carbon dioxide production, I think, is the main mechanism).”

“The equivalent of just about a teaspoonful of unsaturated fat per day is enough to show a threshold increase in the incidence of cancer. When we eat natural foods, were’re always getting some of the unsaturated fats. On a normal diet it’s hard to get down to that threshold of about 4g of fat per day. It’s hard even eating coconut oil and butter fat, and beef fat, and so on ( they only have about 2% of unsaturated fats). So, besides eating the most saturated type of fats, that’s one of the arguments for using carbohydrates as a major part of your energy supply. Because if we have some extra carbohydrates more than we need to burn at the moment, they’ll turn into saturated fats and extend the proportions. So that in effect you can lower the unsaturated proportion below the threshold of carcinogenic fats.”

“Our innate immune system is perfectly competent for handling our normal stress induced exposures to bacterial endotoxin, but as we accumulate the unstable fats, each exposure to endotoxin creates additional inflammatory stress by liberating stored fats.”

“When mitochondria are functioning fully, either glucose or saturated fats can safely provide energy. Some glucose or saturated fat can be converted to polyunsaturated fats, that can be used as regulators or signals, for example to activate the formation of stem cells. But those PUFA don’t create disruptive cascades of increasing excitation or inflammation or excessive growth, and, from the evidence of animals that are fed fat free diets, or diets lacking omega -3 and omega -6 fatty acids, they aren’t toxic to mitochondria.”

Comp Biochem Physiol A Mol Integr Physiol. 2004 Feb;137(2):357-64.
Saturated fatty acids suppress adrenocorticotropic hormone (ACTH) release from rat anterior pituitary cells in vitro.
Katoh K, Asari M, Ishiwata H, Sasaki Y, Obara Y.
We studied whether fatty acids modify adrenocorticotropic hormone (ACTH) release induced by stimulation with corticotropin-releasing hormone (CRH) from rat anterior pituitary cells. Stimulation with CRH (0.01-100 nmol/l) significantly and concentration-dependently increased ACTH release, which was synergistically enhanced by the simultaneous stimulation with 1 nmol/l arginine-vasopressin. Addition of saturated fatty acids (butyrate, caprylate, laurate, palmitate and stearate) in a medium at 1 mmol/l, despite effects on the basal release, significantly reduced the ACTH release induced by CRH (1 nmol/l) stimulation. Caprylate suppressed ACTH release in a concentration-dependent manner. However, unsaturated C18 and C20 fatty acids (oleate, linolate, linolenate and arachidonate) at 1 mmol/l significantly increased the basal release, but none of them suppressed CRH (1 nmol/l)-induced ACTH release. In the presence of caprylate (1 mmol/l), CRH (1 nmol/l)-stimulated increase in cellular calcium ion concentration was diminished. From these results we conclude that saturated fatty acids have a suppressing effect on CRH-induced ACTH increase in primary cultured rat anterior pituitary cells.

Am J Physiol Regul Integr Comp Physiol. 2003 Jun;284(6):R1631-5. Epub 2003 Apr 10.
An oxidized metabolite of linoleic acid stimulates corticosterone production by rat adrenal cells.
Bruder ED1, Ball DL, Goodfriend TL, Raff H.
Oxidized derivatives of linoleic acid have the potential to alter steroidogenesis. One such derivative is 12,13-epoxy-9- keto-10-(trans)-octadecenoic acid (EKODE). To evaluate the effect of EKODE on corticosterone production, dispersed rat zona fasciculata/reticularis (subcapsular) cells were incubated for 2 h with EKODE alone or together with rat ACTH (0, 0.2, or 2.0 ng/ml). In the absence of ACTH, EKODE (26 microM) increased corticosterone production from 5.3 +/- 2.3 to 14.7 +/- 5.0 ng. 10(6) cells. h(-1). The stimulatory effect of ACTH was increased threefold in the presence of EKODE (26.0 microM). Cholesterol transport/P-450scc activity was assessed by measuring basal and cAMP-stimulated pregnenolone production in the presence of cyanoketone (1.1 microM). EKODE (13.1 and 26.0 microM) significantly increased basal and cAMP-stimulated (0.1 mM) pregnenolone production. In contrast, EKODE decreased the effect of 1.0 mM cAMP. EKODE had no effect on early or late-pathway activity in isolated mitochondria. We conclude that EKODE stimulates corticosterone biosynthesis and amplifies the effect of ACTH. Increased levels of fatty acid metabolites may be involved in the increased glucocorticoid production observed in obese humans.

Posted in General.

Tagged with , , , , , , , , , , , , , , .


Estrogen, Uterine Fibroids, and Thyroid Nodules

Also see:
Quotes: Thyroid, Estrogen, Menstrual Symptoms, PMS, and Infertility
Autoimmune Disease and Estrogen Connection
Hormonal profiles in women with breast cancer
PUFA Increases Estrogen
PUFA Inhibit Glucuronidation
PUFA Promote Cancer
Maternal PUFA Intake Increases Breast Cancer Risk in Female Offspring
Vitamin A: Anti-Cancer and Anti-Estrogen
Toxic Plant Estrogens
The Dire Effects of Estrogen Pollution
Progesterone: Essential to Your Well-Being
Alcohol Consumption – Estrogen and Progesterone In Women
Estrogen, Endotoxin, and Alcohol-Induced Liver Injury
Estrogen Levels Increase with Age
Fat Tissue and Aging – Increased Estrogen
Estrogen Related to Loss of Fat Free Mass with Aging
Bisphenol A (BPA), Estrogen, and Diabetes
Shock Increases Estrogen

“In my own experience, no patient has required a hysterectomy for pathological bleeding unless uterine fibroids were present. If organic problems could be ruled out, as they could in the great majority of cases, thyroid deficiency usually could be detected and treatment with thyroid solved the problem. The need for other surgery may be minimized by adequate thyroid therapy in women with low thyroid function. Cysts on the ovary are common in such women and correction of the thyroid deficiency often eliminates the cysts. Fibroid tumors have been rare in hypothyroid women who have been maintained on adequate thyroid therapy. It is possible to produce fibroids in experimental animals by injection of estrogen, and there is evidence of excess of estrogen in hypothyroid women.” -Dr. Broda Barnes

J Clin Endocrinol Metab. 2001 Mar;86(3):1072-7.
Estrogen promotes growth of human thyroid tumor cells by different molecular mechanisms.
Manole D, Schildknecht B, Gosnell B, Adams E, Derwahl M.
Thyroid tumors are about 3 times more frequent in females than in males. Epidemiological studies suggest that the use of estrogens may contribute to the pathogenesis of thyroid tumors. In a very recent study a direct growth stimulatory effect of 17beta-estradiol was demonstrated in FRTL-5 rat thyroid cells. In this work the presence of estrogen receptors alpha and beta in thyroid cells derived from human goiter nodules and in human thyroid carcinoma cell line HTC-TSHr was demonstrated. There was no difference between the expression levels of estrogen receptor alpha in males and females, but there was a significant increase in expression levels in response to 17beta-estradiol. Stimulation of benign and malignant thyroid cells with 17beta-estradiol resulted in an increased proliferation rate and an enhanced expression of cyclin D1 protein, which plays a key role in the regulation of G(1)/S transition in the cell cycle. In malignant tumor cells maximal cyclin D1 expression was observed after 3 h, whereas in benign cells the effect of 17beta-estradiol was delayed. ICI 182780, a pure estrogen antagonist, prevented the effects of 17beta-estradiol. In addition, 17beta-estradiol was found to modulate activation of mitogen-activated protein (MAP) kinase, whose activity is mainly regulated by growth factors in thyroid carcinoma cells. In response to 17beta-estradiol, both MAP kinase isozymes, extracellular signal-regulated protein kinases 1 and 2, were strongly phosphorylated in benign and malignant thyroid cells. Treatment of the cells with 17beta-estradiol and MAP kinase kinase 1 inhibitor, PD 098059, prevented the accumulation of cyclin D1 and estrogen-mediated mitogenesis. Our data indicate that 17beta-estradiol is a potent mitogen for benign and malignant thyroid tumor cells and that it exerts a growth-promoting effect not only by binding to nuclear estrogen receptors, but also by activation of the MAP kinase pathway.

Endocr J. 2010;57(7):615-21. Epub 2010 May 13.
The relationship between thyroid nodules and uterine fibroids.
Kim MH, Park YR, Lim DJ, Yoon KH, Kang MI, Cha BY, Lee KW, Son HY.
Previous studies suggested that estrogen might have an important role in thyroid nodule formation. Besides, it was recently reported that women with uterine fibroids, which estrogen has effects on, had an increased incidence of thyroid nodules. Our study was to identify the relationship between uterine fibroids and thyroid nodules and to find the factors that may have influences on the occurrence of thyroid nodules. We reviewed the records of 1144 participants who attended health check-ups from 2005 to 2008. Evaluated clinical variables included the size and number of thyroid nodules, presence of uterine fibroids, menopausal status, BMI, smoking, alcohol, medication status, serum levels of cholesterol, LH, FSH, and estradiol. A total of 925 participants were included and 163 (17.6%) subjects had thyroid nodules and uterine fibroids simultaneously. A significant association between both diseases existed (P=0.010), and closer relationship was observed in premenopausal women (n=445, P=0.001). In univariate analysis of systemic E2 level and the incidence of thyroid nodule in premenopausal women, systemic E2 levels had inverse correlation with the incidence of thyroid nodules (P=0.024, OR=0.631, CI: 0.424-0.940). In multivariate logistic regression analysis, older age and the presence of uterine fibroids were the independent factors for the presence of thyroid nodules. Our study suggested that uterine fibroids in women were definitely associated with thyroid nodules and estrogen might have a pivotal role in occurrence of both uterine fibroids and thyroid nodules.

Posted in General.

Tagged with , , , , , , , , , .


Ray Peat, PhD on Low Blood Sugar & Stress Reaction

Also see:
Low Blood Sugar Basics
PUFA Promote Stress Response; Saturated Fats Suppress Stress Response
The Randle Cycle
Ray Peat, PhD Quotes on Coconut Oil
Low Carb Diet – Death to Metabolism
Blood Sugar – Resistance to Allergy and Shock
Thumbs Up: Fructose
Theurapeutic Honey – Cancer and Wound Healing
Carbohydrates and Bone Health
Sugar (Sucrose) Restrains the Stress Response
HFCS – More to it than we thought
Protection from Endotoxin
Possible Indicators of High Cortisol and Adrenaline
Thyroid peroxidase activity is inhibited by amino acids
Toxicity of Stored PUFA
Belly Fat, Cortisol, and Stress
Ray Peat, PhD Quotes on Therapeutic Effects of Niacinamide

“The maladaptive sequence, starting from stress or hypothyroidism, would typically involve increased absorption of endotoxin, leading to interference with mitochondrial respiration, a shift to fat oxidation, inflammation, and the increase of a wide range of stress hormones. Each of these happens to interfere with the production of progesterone, leading to increased LH.”

“When the tissues are saturated with those antithyroid fats [PUFA], metabolism slows, especially when any stress, such as cold or hunger, increases the concentration of free fatty acids in the blood stream.”

“Decreased blood sugar is a basic signal for the release of adrenal hormones.”

“When we don’t eat for many hours, our glycogen stores decrease, and adrenaline secretion is increased, liberating more glucose as long as glycogen is available, but also liberating fatty acids from the fatty tissues. When the diet has chronically contained more polyunsaturated fats than can be oxidized immediately or detoxified by the liver, the fat stores will contain a disproportionate amount of them, since fat cells preferentially oxidize saturated fats for their own energy, and the greater water solubility of the PUFA causes them to be preferentially released into the bloodstream during stress.

In good health, especially in children, the stress hormones are produced only in the amount needed, because of negative feedback from the free saturated fatty acids, which inhibit the production of adrenalin and adrenal steroids, and eating protein and carbohydrate will quickly end the stress. But when the fat stores contain mainly PUFA, the free fatty acids in the serum will be mostly linoleic acid and arachidonic acid, and smaller amounts of other unsaturated fatty acids. These PUFA stimulate the stress hormones, ACTH, cortisol, adrenaline, glucagon, and prolactin, which increase lipolysis, producing more fatty acids in a vicious circle. In the relative absence of PUFA, the stress reaction is self limiting, but under the influence of PUFA, the stress response becomes self-amplifying.”

“I don’t have an eating plan, other than to be perceptive and to learn about your physiology, so that you can adjust things to your needs. Any craving is a good starting point, because we have several biological mechanisms for correcting specific nutritional deficiencies. When something is interfering with your ability to use sugar, you crave it because if you don’t eat it you will waste protein to make it.”

“While stress typically causes the adrenal glands to produce cortisol, extreme stress, as described by Hans Selye, damages the adrenal cortex, and can cause the cells to die, leading to the death of the animal. There is evidence that it is the breakdown of unsaturated fatty acids that causes damage to the adrenal cortex in extreme stress. Although many factors influence the production of the adrenal steroids, arachidonic acid, even without being converted to prostaglandins, is an important activator of aldosterone synthesis. Adrenalin, produced in response to a lack of glucose, liberates free fatty acids from the tissues, so when the tissues contain large amounts of the polyunsaturated fatty acids, the production of aldosterone will be greater than it would be otherwise.”

“There is a growing recognition that a persistent increase of free fatty acids in the serum, which is seen in shock, heart failure, and aging, indicates a bad prognosis, but there is no generally recognized explanation for the fact that free fatty acids are harmful. I want to mention some evidence showing that it is the accumulation of polyunsaturated fats in the body that makes them harmful.”

“Stress seems to be perceived as a need for sugar.”

“The polyunsaturated oils interact closely with serotonin and tryptophan, and the short and medium chain saturated fatty acids have antihistamine and antiserotonin actions. Serotonin liberates free fatty acids from the tissues, especially the polyunsaturated fats, and these in turn liberate serotonin from cells such as the platelets, and liberate tryptophan from serum albumin, increasing its uptake and the formation of serotonin in the brain. Saturated fats don’t liberate serotonin, and some of them, such as capric acid found in coconut oil, relax blood vessels, while linoleic acid constricts blood vessels and promotes hypertension. Stress, exercise, and darkness, increase the release of free fatty acids, and so promote the liberation of tryptophan and formation of serotonin. Increased serum linoleic acid is specifically associated with serotonin-dependent disorders such as migraine.

Coconut oil, because of its saturated fatty acids of varied chain length, and its low linoleic acid content, should be considered as part of a protective diet.”

“The saturated fats, in themselves, seem to have no “signalling” functions, and when they are naturally modified by our desaturating enzymes, the substances produced behave very differently from the plant-derived “eicosanoids.” As far as their effects have been observed, it seems that they are adaptive, rather than dysadaptive.”

“The alarm reaction produced either by damage of some of our own tissue or by the entrance of LPS into the circulation can, under ideal circumstances, lead to a series of protective and defensive reactions, that resolve the problem. The production of steroids is increased, and, early in life, the liberation of fatty acids itself can contribute to the antiinflammatory processes that restore the barrier function and energy production. But when the endogenous omega-9 fatty acids have been thoroughly displaced by dietary omega-6 and omega -3 fatty acids, the systemic release of fatty acids becomes an amplifier of the stress state initiated by injury or other stress. The liver, for example, decreases its detoxification of estrogen in the presence of polyunsaturated fatty acids.”

“The stress response is self-sustaining on several levels. For example, stress increases the absorption of bacterial endotoxin from the intestine, which increases the estrogen level and synergizes with biliverdin and cortisol.”

“The first reaction to a decrease of blood glucose, at least in healthy individuals, is to increase the activity of the sympathetic nervous system, with an increase in adrenaline, which causes the liver to release glucose from the glycogen stores. The effect of adrenaline on the liver is very quick, but adrenaline also acts on the brain, stimulating CRH, which causes the pituitary to secrete ACTH, which stimulates the the adrenal cortex to release cortisol, which by various means causes blood sugar to increase, consequently causing the sympathetic nervous system activity to decrease. Even when the liver’s glycogen stores are adequate, the system cycles rhythmically, usually repeating about every 90 minutes throughout the day…With advancing age, most tissues become less sensitive to adrenaline and the sympathetic nervous stimulation, and the body relies increasingly on the production of cortisol to maintain blood glucose.”

“An immediate reaction to hunger is to secrete adrenalin, which draws glucose from the liver and fats from the fatty tissues. When the liver’s glycogen is depleted, cortisol is produced to mobilize amino acids from muscles and other tissues, to provide energy.

Muscle protein is very rich in tryptophan and cysteine, and these amino acids suppress the thyroid gland’s function, and are potentially toxic to nerves, especially in the presence of cortisol and hypoglycemia. Tryptophan is turned into serotonin, which promotes lipid peroxidation, blood clotting, and certain patterns of nerve activity. Serotonin can suppress mitochondrial respiration, and along with the reduced body temperature that it produces, a pattern of torpor or helplessness tends to be produced.”

“The amount of glucose in liver cells regulates the enzyme that converts T4 to T3. This means that hypoglycemia or diabetes (in which glucose doesn’t enter cells efficiently) will cause hypothyroidism, when T4 can’t be converted into T3. When a person is fasting, at first the liver’s glycogen stores will provide glucose to maintain T3 production. When the glycogen is depleted, the body resorts to the dissolution of tissue to provide energy. The mobilized fatty acids interfere with the use of glucose, and certain amino acids suppress the thyroid gland. Eating carbohydrate (especially fruits) can allow the liver to resume its production of T3.”

“Stress and starvation lead to a relative reliance on the fats stored in the tissues, and the mobilization of these as circulating free fatty acids contributes to a slowing of metabolism and a shift away from the use of glucose for energy. This is adaptive in the short term, since relatively little glucose is stored in the tissues (as glycogen), and the proteins making up the body would be rapidly consumed for energy, if it were not for the reduced energy demands resulting from the effects of the free fatty acids.”

“When our glucose (glycogen) stores have been depleted, we convert our own tissue into free amino acids, some of which are used to produce new glucose. The amino acids cysteine and tryptophan, released in large quantities during stress, have antimetabolic (thyroid-suppressing) and, eventually, toxic effects.”

“Insulin release is also stimulated by amino acids such as leucine, and insulin stimulates cells to absorb amino acids and to synthesize proteins. Since insulin lowers blood sugar as it disposes of amino acids, eating a large amount of protein without carbohydrate can cause a sharp decrease in blood sugar. This leads to the release of adrenalin and cortisol, which raise the blood sugar. Adrenalin causes fatty acids to be drawn into the blood from fat stores, especially if the liver’s glycogen stores are depleted, and cortisol causes tissue protein to be broken down into amino acids, some of which are used in place of carbohydrate. Unsaturated fatty acids, adrenaline, and cortisol cause insulin resistance.”

“When sugar isn’t available in the diet, stored glycogen will provide some glucose (usually for a few hours, up to a day), but as that is depleted, protein will be metabolized to provide sugar. If protein is eaten without carbohydrate, it will stimulate insulin secretion, lowering blood sugar and activating the stress response, leading to the secretion of adrenalin, cortisol, growth hormone, prolactin, and other hormones. The adrenalin will mobilize glycogen from the liver, and (along with other hormones) will mobilize fatty acids, mainly from fat cells. Cortisol will activate the conversion of protein to amino acids, and then to fat and sugar, for use as energy. (If the diet doesn’t contain enough protein to maintain the essential organs, especially the heart, lungs, and brain, they are supplied with protein from the skeletal muscles. Because of the amino acid composition of the muscle proteins, their destruction stimulates the formation of additional cortisol, to accelerate the movement of amino acids from the less important tissues to the essential ones.)”

“In the excessively sensitive condition produced by hypoglycemia, several things happen that contribute to the maladaptive exaggerated inflammatory response.

Adrenaline increases in hypoglycemia, and, if the adrenaline fails to convert glycogen into glucose, it will provide an alternative fuel by liberating free fatty acids from fat cells.

If the liberated fatty acids are unsaturated, they will cause serotonin to be secreted, and both serotonin and the unsaturated fatty acids will suppress mitochondrial respiration, exacerbating the hypoglycemia. They will stimulate the release of cytokines, activating a variety of immunological and inflammatory processes, and they will cause blood vessels to become leaky, creating edema and starting the first stages of fibrosis. Both adrenaline and serotonin will stimulate the release of cortisol, which mobilizes amino acids from tissues such as the large skeletal muscles. Those muscles contain a large amount of cysteine and tryptophan, which, among other effects, suppress the thyroid. The increased tryptophan, especially in the presence of free fatty acids, is likely to be converted into additional serotonin, since fatty acids release tryptophan from albumin, increasing its entry into the brain. Free fatty acids and increased serotonin reduce metabolic efficiency (leading to insulin resistance, for example) and promote an inflammatory state.”

“Blood sugar falls at night, and the body relies on the glucose stored in the liver as glycogen for energy, and hypothyroid people store very little sugar. As a result, adrenalin and cortisol begin to rise almost as soon as a person goes to bed, and in hypothyroid people, they rise very high, with the adrenalin usually peaking around 1 or 2 A.M., and the cortisol peaking around dawn; the high cortisol raises blood sugar as morning approaches, and allows adrenalin to decline. Some people wake up during the adrenalin peak with a pounding heart, and have trouble getting back to sleep unless they eat something. If the night-time stress is very high, the adrenalin will still be high until breakfast, increasing both temperature and pulse rate. The cortisol stimulates the breakdown of muscle tissue and its conversion to energy, so it is thermogenic, for some of the same reasons that food is thermogenic.

After eating breakfast, the cortisol (and adrenalin, if it stayed high despite the increased cortisol) will start returning to a more normal, lower level, as the blood sugar is sustained by food, instead of by the stress hormones. In some hypothyroid people, this is a good time to measure the temperature and pulse rate. In a normal person, both temperature and pulse rate rise after breakfast, but in very hypothyroid people either, or both, might fall.”

“At rest your brain and red blood cells needs sugar and they will keep burning sugar regardless of where they get it.

If you do not eat enough of the necessary nutrients your body will convert your muscles to sugar to keep feeding the brain what it needs and if you are eating enough sugar or things that will turn into sugar your body doesn’t have to break down its own tissues to make the necessary glucose for your blood cells and brains.

In that condition, your muscles at rest don’t require practically any glucose and they will do fine on a pure fat diet but that’s the resting muscle.”

“Saturated fatty acids terminate the stress reactions, polyunsaturated fatty acids amplify them.”

“My argument here will be that some of our adaptive, protective regulatory processes are overridden by the excessive supply of unsaturated fats–supported by a few other toxins–in our diet, acting as a false-signal system, and that cholesterol, pregnenolone, and progesterone which are our main long-range defenses, are overcome by the effects of the unsaturated fats, and that the resulting cascade of ineffective and defective reactions (including various estrogen-stimulated processes) leads to lower and lower energy production, reduced function, and death. At certain times, especially childhood and old age, iron (which also has important regulatory roles) accumulates to the point that its signal functions may be inappropriate.”

“Our innate immune system is perfectly competent for handling our normal stress induced exposures to bacterial endotoxin, but as we accumulate the unstable fats, each exposure to endotoxin creates additional inflammatory stress by liberating stored fats.”

“In a young person, good food, sunlight, and a high altitude can often overcome severe and progressive inflammatory conditions. In an older person, whose tissues contain larger amounts of polyunsaturated fats and their breakdown products, it takes more environmental support to get out of the inflammatory pattern.”

“The hypoglycemia and related events resulting from accelerated glycolysis provide a stimulus for increased activity of the adaptive hormones, including cortisol. Cortisol helps to maintain blood sugar by increasing the conversion of protein to amino acids, and mobilizing free fatty acids from fat stores. The free fatty acids inhibit the use of glucose, so the stress metabolism relies largely on the consumption of amino acids. This increases the formation of ammonia, yet the combination of glycolysis and fat oxidation provides less carbon dioxide, which is needed for the conversion of ammonia to urea. Ammonia stimulates the formation of lactate, while carbon dioxide inhibits it.

Starving an animal with a tumor increases the stress hormones, providing free fatty acids and amino acids, and accelerates the tumor’s growth (Sauer and Dauchy, 1987); it’s impossible to “starve a tumor,” by the methods often used. Preventing the excessive breakdown of protein and reducing the release of fatty acids from fat cells would probably cause many cancer cells to die, despite the availability of glucose, because of lactate’s toxic effects, combined with the energy deficit caused by the respiratory defect that causes their aerobic glycolysis. Recently, the intrinsically high rate of cell death in tumors has been recognized. The tumor is maintained and enlarged by the recruitment of “stem cells.” These cells normally would repair or regenerate the tissue, but under the existing metabolic conditions, they fail to differentiate properly.”

“Stress, even emotional stress, decreases the barrier function of the intestine, allowing bacterial endotoxin to be absorbed. Endotoxin activates a variety of enzymes, including those that liberate free fatty acids from the tissues. This is associated with systemic inflammation, and conditions including liver cirrhosis, Parkinson’s disease, and nerve inflammation (Garate, et al., 2013). This immediate direct effect of endotoxin, the lipolytic increase of free fatty acids in the circulation blocks insulin-stimulated glucose uptake (Buhl, et al, 2013; Wellhoener 2011). Despite this now well established role of stress and endotoxin in the production of hyperglycemia, the medical diagnosis of “diabetes” is universally made without measuring either cortisol or endotoxin.”

“If you’re really healthy, then you can meet challenges without experiencing something that Hans Selye would have called stress. For example, if you are not very healthy, just skipping a meal can put you in really serious stress. But a healthy person stores something like 7 or 8 ounces of glucose in the form of glycogen in the liver and the muscles and brain. And since at rest the muscles can burn primarily fatty acids, your brain is the main thing that consumes glucose.

If you’re inactive and relaxed, you can easily go 12-15 hours without eating or without any stress at all. But if you’re not able to store that much glycogen, (for example low thyroid people, or people with a history of severe stress aren’t able to store very much glycogen), and so when you run out of sugar, whether it’s from going all day without eating or because your liver isn’t very efficient, your body tries to increase the available glucose.

Normally, just being awake makes enough adrenaline to mobilize as much glucose from your stores as you need. But when you run out of that stored sugar, your brain still requires sugar to function properly. So, instead of just increasing the adrenaline more and more, when the adrenaline reaches a certain level and can’t get the blood sugar up from storage, then you turn on the cortisol. And that’s the classic stress that can be harmful, because the cortisol dissolves first tissues which are very fragile (like the thymus — that starts turning to sugar immediately when you run out of stored glycogen). And when the thymus is gone in just two or three hours of intense stress, that happens to be one of the reasons they think adults don’t have thymus glands, because by the time they’re dead and are analyzed, the thymus has been eaten up by stress; they might have had a perfectly normal thymus until they were sick and dead.

After the thymus is consumed and turned to sugar, the cortisol starts breaking down your muscles, then your skin. The brains, lungs and heart are spared from stress, partly because in a healthy person they are very saturated with androgens (testosterone and DHEA especially) which block the breakdown function of cortisol. If your brain, lungs and heart are short of those protective steroids then that’s where the stress really starts causing severe, deadly damage. The post-traumatic stress disorder is produced when someone has had such terrible stress, such as being tortured or being in terrific catastrophes, that they not only deplete their stored glycogen and breakdown the expendable tissues like thymus and liver, but then the cortisol starts damaging the brain and heart, and so on. So they get very severe chronic symptoms. Once the stress is completely resolved, then the brain can massively regenerate itself. For example they’ve seen MRIs of girls who have been in anorexia for months, their brain shrinks from living on the cortisol breaking down their tissues, but when they start eating the brain can rebuild itself in just a few weeks.”

“One of the reasons that the single meal eaters tend to get fat and diabetic, is that it triggers a great surge of insulin, and the insulin then triggers cortisol. If you can eat foods that don’t trigger insulin, that’s the ideal thing. And fruit happens to be the best single type of food for not triggering the stress reactions, because it combines very small amounts of protein, with large amounts of sugar and minerals. Potassium happens to handle sugar in place of insulin, and the fructose component of fruit doesn’t require insulin. So, eating a lot of fruit, even at one meal a day, produces much smaller amounts of insulin, obesity, and cortisol, than eating, for example, just one big meal of meat and potatoes. Meat powerfully stimulates insulin and cortisol. And starches are more stimulating to insulin than sugars.” (Effects of Stress and Trauma, KMUD)

“One of the things was reading John Yudkin’s book, the English guy who wrote a book saying that sugar causes heart disease, and he was very clear showing that sugar increases cholesterol and that was back in the time when everyone was saying cholesterol causes heart disease. And I was very impressed by his research but since I saw cholesterol as a protective factor from studying progesterone, I saw that if you’re deficient in progesterone or under stress, your body would increase production of cholesterol to make more progesterone to protect your systems. And so I believed Yudkin was on the right track but since I say cholesterol as protective rather than harmful, I took his evidence to mean that sugar would helped resist stress, so that started me. Along that line – and I have been a migrainer for all my life and I gradually came see that a change in my rhythm of eating in relation to activity was usually what brought on a migraine attack. And often I would have very odd food cravings just before the migraine appeared and even shortly after eating, I would get food cravings and I started trusting those cravings and eating again, and I found that if I ate enough sweet stuff like a quart of ice cream when I felt a migraine coming on, it wouldn’t come on. And I was also a sort of a problem sleeper if I stayed up just an hour or two after my normal bed time, then my sleep would be disturbed even for a couple following nights. And one night I was talking on the radio and that I wanted to keep going hour after hour and I had a friend to go out and buy me huge milkshakes about one an hour and I was able to keep talking until 1: 00 AM, and didn’t have any problem at all going to sleep. And so I recognized that I had a peculiar need for sugar when I was doing anything unusually stressful, and so that started me thinking more about the physiology of it. (email message)

Posted in General.

Tagged with , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , .


Carbon Dioxide as an Antioxidant

Also see:
Protect the Mitochondria
Carbon Dioxide Basics
Comparison: Carbon Dioxide v. Lactic Acid
Comparison: Oxidative Metabolism v. Glycolytic Metabolic
Promoters of Efficient v. Inefficient Metabolism
Altitude Sickness: Therapeutic Effects of Acetazolamide and Carbon Dioxide
Low CO2 in Hypothyroidism
Protective Altitude
Lactate Paradox: High Altitude and Exercise
Protective Carbon Dioxide, Exercise, and Performance
Synergistic Effect of Creatine and Baking Soda on Performance
Ray Peat, PhD on Carbon Dioxide, Longevity, and Regeneration
Altitude Improves T3 Levels
Mitochondria & Mortality
Altitude and Mortality
Lactate vs. CO2 in wounds, sickness, and aging; the other approach to cancer

Quotes by Ray Peat, PhD:
“The suppression of mitochondrial respiration increases the production of toxic free radicals, and the decreased carbon dioxide makes the proteins more susceptible to attack by free radicals.”

“The presence of carbon dioxide is an indicator of proper mitochondrial respiratory functioning.”

“In every type of tissue, it is the failure to oxidize glucose that produces oxidative stress and cellular damage.”

Physiol Res. 2002;51(4):335-9.
The role of carbon dioxide in free radical reactions of the organism.
Veselá A, Wilhelm J.
Carbon dioxide interacts both with reactive nitrogen species and reactive oxygen species. In the presence of superoxide, NO reacts to form peroxynitrite that reacts with CO2 to give nitrosoperoxycarbonate. This compound rearranges to nitrocarbonate which is prone to further reactions. In an aqueous environment, the most probable reaction is hydrolysis producing carbonate and nitrate. Thus the net effect of CO2 is scavenging of peroxynitrite and prevention of nitration and oxidative damage. However, in a nonpolar environment of membranes, nitrocarbonate undergoes other reactions leading to nitration of proteins and oxidative damage. When NO reacts with oxygen in the absence of superoxide, a nitrating species N2O3 is formed. CO2 interacts with N2O3 to produce a nitrosyl compound that, under physiological pH, is hydrolyzed to nitrous and carbonic acid. In this way, CO2 also prevents nitration reactions. CO2 protects superoxide dismutase against oxidative damage induced by hydrogen peroxide. However, in this reaction carbonate radicals are formed which can propagate the oxidative damage. It was found that hypercapnia in vivo protects against the damaging effects of ischemia or hypoxia. Several mechanisms have been suggested to explain the protective role of CO2 in vivo. The most significant appears to be stabilization of the iron-transferrin complex which prevents the involvement of iron ions in the initiation of free radical reactions.

Fiziol Zh Im I M Sechenova. 1995 Feb;81(2):47-52.
[The unknown physiological role of carbon dioxide].
[Article in Russian]
Baev VI, Vasil’eva IV, L’vov SN, Shugaleĭ IV.
In rats adapted to hypoxia, in gradual increase of CO and decrease in monosialogangliosides, were shown as well as insufficient accumulation of the lipid peroxidation products. The data suggests that carbon dioxide is a natural element of the organism antioxidant defence system.

Vopr Med Khim. 1996 Jul-Sep;42(3):193-202.
[Ability of carbon dioxide to inhibit generation of superoxide anion radical in cells and its biomedical role].
[Article in Russian]
Kogan AKh, Grachev SV, Eliseeva SV, Bolevich S.
The study was carried out on blood phagocytes and alveolar macrophages of 96 persons, cells of inner organs and tissue phagocytes (liver, brain, myocardium, lungs, kidneys, stomach, skeletal muscles), as well as on mitochondria of the liver of 186 non-linear white mice. Generation of active oxygen forms (AOF) was evaluated by various methods with CO2 directly affecting the cells and bioptates and indirectly the whole organism. The results show that CO2 with tension close to that of the blood (37.0 mm Hg) and at higher tensions (60 and 146 mm Hg) is a powerful inhibitor of AOF generation by human and animal cells, as well as by liver mitochondria of mice. The data obtained allow to explain, in terms of AOF role, a number of physiological and pathophysiological (medical) CO2 effects.

Izv Akad Nauk Ser Biol. 1997 Mar-Apr;(2):204-17.
[Carbon dioxide–a universal inhibitor of the generation of active oxygen forms by cells (deciphering one enigma of evolution)].
[Article in Russian]
Kogan AKh, Grachev SV, Eliseeva SV, Bolevich S.
Studies were carried out on blood phagocytes and alveolar macrophages of 96 humans, on the cells of the viscera and tissue phagocytes (liver, brain, myocardium, lungs, kidneys, stomach, and skeletal muscle), and liver mitochondria of 186 random bred white mice. Generation of the active oxygen forms was determined using different methods after direct effect of CO2 on the cells and biopsies and indirect effect of CO2 on the integral organism. The results obtained suggest that CO2 at a tension close to that observed in the blood (37.0 mm Hg) and high tensions (60 or 146 mm Hg) is a potent inhibitor of generation of the active oxygen forms by the cells and mitochondria of the human and tissues. The mechanism of CO2 effect appears to be realized, partially, through inhibition of the NADPH-oxidase activity. The results are important for deciphering of a paradox of evolution, life preservation upon appearance of oxygen in the atmosphere and succession of anaerobiosis by aerobiosis, and elucidation of some other problems of biology and medicine, as well as analysis of the global bioecological problem, such as ever increasing CO2 content in the atmosphere.

Patol Fiziol Eksp Ter. 1995 Jul-Sep;(3):34-40.
[Comparative study of the effect of carbon dioxide on the generation of active forms of oxygen by leukocytes in health and in bronchial asthma].
[Article in Russian]
Kogan AKh, Bolevich S, Daniliak IG.
The study was conducted by using leukocytes isolated from 74 apparently healthy donors and 60 patients with bronchial asthma. The generation of active oxygen forms was determined by luminolo- and lucigenin-dependent chemiluminescence techniques and NTC-reaction. The findings suggest that at the tension close to the blood tension of 37.5 mm Hg and the high tension of 146 mm Hg is a powerful natural inhibitor of leukocytic generation of active oxygen forms. At an exacerbation, the inhibitory effect of carbon dioxide on the leukocytic generation of active oxygen forms decreased in most (70%) patients with bronchial asthma, which potentiates the free radical mechanism of development of bronchial asthma. It may be held that the literature-described use of carbon dioxide for the treatment of bronchial asthma is justifiable only in a lower proportion of patients who have preserved a high sensitivity to the inhibitory effect of carbon dioxide on the generation of active oxygen forms.

Vojnosanit Pregl. 1996 Jul-Aug;53(4):261-74.
[Carbon dioxide inhibits the generation of active forms of oxygen in human and animal cells and the significance of the phenomenon in biology and medicine].
[Article in Serbian]
Boljevic S, Kogan AH, Gracev SV, Jelisejeva SV, Daniljak IG.
Carbon dioxide (CO2) influence in generation of active oxygen forms (AOF) in human mononuclear cells (blood phagocytes and alveolar macrophages) and animal cells (tissue phagocytes, parenchymal and interstitial cells of liver, kidney, lung, brain and stomach) was investigated. The AOF generation was examined by the methods of chemiluminiscence (CL) using luminol, lucigenin and NBT (nitro blue tetrazolium) reaction. It was established that CO2 in concentrations similar to those in blood (5.1%, pCO2 37.5 mmHg) and at high concentrations (8.2%, pCO2 60 mmHg; 20%, pCO2 146 mmHg) showed pronounced inhibitory effect on the AOF generation in all the studied cells (usually reducing it 2 to 4 times). Those results were obtained not only after the direct contact of isolated cells with CO2, but also after the whole body exposure to CO2. Besides, it was established that venous blood gas mixture (CO2 – 45 mmHg, +O2 – 39 mmHg, + N2 – 646 mmHg) inhibited the AOF generation in cited cells more than the arterial blood gas mixture (CO2 – 40 mmHg, + O2 – 95 mmHg, + N2 – 595 mmHg). Carbon dioxide action mechanism was developed partially through the inhibition of the OAF generation in mitochondria and through deceleration of NADPH oxidative activity. Finally, it was established that CO2 led to the better coordination of oxidation and phosphorylation and increased the phosphorylation velocity in liver mitochondria. The results clearly confirmed the general property of CO2 to inhibit significantly the AOF generation in all the cell types. This favors the new explanation of the well-known evolutionary paradox: the Earth life and organisms preservation when the oxygen, that shows toxic effects on the cells through the AOF, occurs in the atmosphere. The results can also be used to explain in a new way the vasodilating effect of CO2 and the favorable hypercapnotherapy influence on the course of some bronchial asthma forms. The results are probably significant for the analysis of important bio-ecological problem, such as the increase of CO2 concentration in the atmosphere and its effect on the humans and animals.

==================================
Implications in health vs. diseease:

J Pharmacol Exp Ther. 2012 Sep;342(3):608-18. doi: 10.1124/jpet.112.192120. Epub 2012 Jun 13.
Oxidative shielding or oxidative stress?
Naviaux RK.
In this review I report evidence that the mainstream field of oxidative damage biology has been running fast in the wrong direction for more than 50 years. Reactive oxygen species (ROS) and chronic oxidative changes in membrane lipids and proteins found in many chronic diseases are not the result of accidental damage. Instead, these changes are the result of a highly evolved, stereotyped, and protein-catalyzed “oxidative shielding” response that all eukaryotes adopt when placed in a chemically or microbially hostile environment. The machinery of oxidative shielding evolved from pathways of innate immunity designed to protect the cell from attack and limit the spread of infection. Both oxidative and reductive stress trigger oxidative shielding. In the cases in which it has been studied explicitly, functional and metabolic defects occur in the cell before the increase in ROS and oxidative changes. ROS are the response to disease, not the cause. Therefore, it is not the oxidative changes that should be targeted for therapy, but rather the metabolic conditions that create them. This fresh perspective is relevant to diseases that range from autism, type 1 diabetes, type 2 diabetes, cancer, heart disease, schizophrenia, Parkinson’s disease, and Alzheimer disease. Research efforts need to be redirected. Oxidative shielding is protective and is a misguided target for therapy. Identification of the causal chemistry and environmental factors that trigger innate immunity and metabolic memory that initiate and sustain oxidative shielding is paramount for human health.

Posted in General.

Tagged with , , , , , , , , , , , .