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Nathan Goodyear

The role of short-chain fatty acids in the interplay between diet, gut microbiota, and ... - 0 views

  • Acetate, propionate, and butyrate are present in an approximate molar ratio of 60:20:20 in the colon and stool
  • SCFAs might play a key role in the prevention and treatment of the metabolic syndrome, bowel disorders, and certain types of cancer
  • SCFA administration positively influenced the treatment of ulcerative colitis, Crohn's disease, and antibiotic-associated diarrhea
  • ...16 more annotations...
  • Gut bacteria in the cecum and large intestine produce SCFAs mainly from nondigestible carbohydrates that pass the small intestine unaffected
  • plant cell-wall polysaccharides, oligosaccharides, and resistant starches
  • inulin shifted the relative production of SCFAs from acetate to propionate and butyrate
  • age of approximately 3–4 years, when it becomes mature
  • SCFAs affect lipid, glucose, and cholesterol metabolism
  • colonocytes, the first host cells that take up SCFAs and which depend largely on butyrate for their energy supply
  • the microbiota educate the immune system and increase the tolerance to microbial immunodeterminants
  • the microbiota act as a metabolic organ that can break down otherwise indigestible food components, degrade potentially toxic food compounds like oxalate, and synthesize certain vitamins and amino acids
  • a large part of the SCFAs is used as a source of energy
  • The general idea is that colonocytes prefer butyrate to acetate and propionate, and oxidize it to ketone bodies and CO2
  • Exogenous acetate formed by colonic bacterial fermentation enters the blood compartment and is mixed with endogenous acetate released by tissues and organs (103, 104). Up to 70% of the acetate is taken up by the liver (105), where it is not only used as an energy source, but is also used as a substrate for the synthesis of cholesterol and long-chain fatty acids and as a cosubstrate for glutamine and glutamate synthesis
  • SCFAs regulate the balance between fatty acid synthesis, fatty acid oxidation, and lipolysis in the body.
  • Fatty acid oxidation is activated by SCFAs, while de novo synthesis and lipolysis are inhibited
  • obese animals in this study showed a 50% reduction in relative abundance of the Bacteroidetes (i.e., acetate and propionate producers), whereas the Firmicutes (i.e., butyrate producers) were proportionally increased compared with the lean counterparts.
  • increase in total fecal SCFA concentrations in obese humans.
  • In humans the distinct relation between the Firmicutes:Bacteroidetes ratio and obesity is less clear.
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    Great review of the role of SCFA in gut health and body metabolism
Nathan Goodyear

JAMA Network | JAMA | Conjugated Equine Estrogens and Incidence of Probable D... - 0 views

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    This was the WHI review of data as it pertains to dementia and cognitive decline in women.  The take home here is that the data provides little evidence for premarin with or without medroxyprogesterone acetate in > 65 for prevention of dementia.  However, this is in women > 65 and studies show that younger women do indeed receive benefit, especially in those with early ovary removal.  Another point here, MPA (medroxyprogesterone acetate) increases cognitive decline.  Just don't take MPA, it is a bad drug all the way around!
Nathan Goodyear

Medroxyprogesterone Acetate Induces Cell Proliferation through Up-Regulation ... - 0 views

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    medroxyprogesterone acetate, synthetic progestin, shown to increase inflammation signaling in human breast cancer cells.  This is a proposed mechamism by which growth stimulation occurs with prover and breast cancer.  
Nathan Goodyear

Immunosuppressive Biological Mechanisms Support Reassessment of Use of the Injectable C... - 0 views

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    Injectable medroxyprogesterone acetate for contraception provides immune suppression through glucocorticoid receptors.
Nathan Goodyear

Differential regulation of endothelium behavior by progesterone and medroxyprogesterone... - 0 views

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    No surprise that progesterone and the synthetic progestin medroxyprogesterone acetate (MPA) have different effects on the vascular endothelium. MPA inhibits NO production, whereas Progesterone maintains NO production.  MPA promoted platelet adhesion whereas Progesterone did not--significant implication in plaque formation.
Nathan Goodyear

Taylor & Francis Online :: Effects of Dietary Apigenin on Tumor Latency, Incidence and ... - 0 views

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    There is absolutely no reason for women to take medroxyprogesterone acetate.  Whether the author realizes it or not, he states a truth that progestin is a "trigger" in carcinogenesis of the breast.  This study was designed to look at high dose apigenin, which the study found increased risk.
Nathan Goodyear

Effect of Medroxyprogesterone Acetate on Endothelium-Dependent Vasodilation in Postmeno... - 0 views

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    Estradiol has been shown to have positive health effects on vascular endothelium.  The synthetic progestin, medroxyprogesterone acetate, negates this.  
Nathan Goodyear

Medroxyprogesterone acetate induces cell prolifera... [Endocrinology. 2005] - PubMed re... - 0 views

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    MedroxyProgesterone Acetate increases breast cell growht
Nathan Goodyear

JAMA Network | JAMA | Estrogen Plus Progestin and the Incidence of Dementia a... - 0 views

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    Estrogen with progestin worsens cognitive decline in women >65.  Little can be taken from this study other than, medroxyprogesterone acetate is a bad drug and should not be given to women for any purpose, especially in those >65.  One wonders if bioidentical, physiologic hormone replacement would have the same effect?  I doubt it.  The likely negative impact of hormones on the brain in women >65 is due to the negative effects of MPA, the change in inflammatory cytokines, and the change in receptors.
Nathan Goodyear

Medroxyprogesterone interferes with ovarian steroid ... [Nat Med. 1997] - PubMed - NCBI - 0 views

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    head to head study in rhesus monkeys finds that medroxyprogesterone acetate negates the positive vascular effects of estradiol.  This is in contrast to the bioidentical progesterone.
Nathan Goodyear

Informa Healthcare - Climacteric - 6(3):221 - Summary - 0 views

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    Progesterone reduce breast growth and Medroxyprogesterone acetate increases breast growth
Nathan Goodyear

Natural progesterone, but not medroxyprogesterone acetate, enhances the beneficial effe... - 0 views

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    Natural progesterone, but not medroxyprogesterone acetate, enhances the beneficial effect of estrogen on exercise-induced myocardial ischemia in postmenopausal women
Nathan Goodyear

Effect of Medroxyprogesterone Acetate on Endothelium-Dependent Vasodilation in Postmeno... - 0 views

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    medroxyprogsterone acetate (synthetic progestin) increase vascular function in postmenopausal women
Nathan Goodyear

Acetate mediates a microbiome-brain-β-cell axis to promote metabolic syndrome... - 0 views

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    New study proposes how altered gut microbiota leads to obesity.  The short answer is increased insulin production, increased gherlin, and older studies suggest inflammation also.
Nathan Goodyear

Apigenin Induces Apoptosis and Blocks Growth of Medroxyprogesterone Acetate-Dependent B... - 0 views

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    Finally, something that lowers the risk associated with synthetic progestins. Progestins are progesterone pretenders that increase breast cancer. Apigenin, a component of bioflavonoid, was shown to inhibit growth and intact cause cell death.
Nathan Goodyear

JAMA Network | JAMA | Menopausal Hormone Therapy and Health Outcomes During the Interve... - 0 views

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    This study cannot make the conclusion AT ALL.  They claim to say hormones should not be used to prevent chronic disease. Yet, the study they use to support this statement, the WHI, did not look at hormones.  The WHI looked at premarin and medroxyprogesterone acetate, a progestin.  They are not the hormones the body makes. Second, the WHI looked at women that were 6 years postmenopausal, on average, and then they added in bad drugs, disguised as hormone like, and then were dosed high.   If one desires to truly make a statement of prevention, one needs to pre-empt testing and therapy before disease.  Additionally, the study needs to match the hormones needed at the right physiologic level in the right balance.   One must also ensure proper hormone metabolism and know hormone receptor status.  This study does non of the above and the conclusion of this study is irrelevant.  In fact, I think the authors of this study have undergone scientific malpractice in their conclusions.
Nathan Goodyear

The mortality toll of estrogen avoidance:... [Am J Public Health. 2013] - PubMed - NCBI - 0 views

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    Yale study finds estrogen therapy in improves health in women ages 50-59.  The problems with hormone therapy is synthetics and overdosing.  The problem with the WHI was they used medroxy progesterone acetate--a synthetic progestin.   That is not progesterone.  This study estimated that 91,000 + died due to the uneducated view that estrogen HRT is dangerous.  What is dangerous is leaving the HRT and BHRT recommendations to those with conflicts of interest and a lack of knowledge of the science.
Rahul Sharma

CA Syringe Filters Sterile and Non Sterile | Axiva - 0 views

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    CA Syringe Filters (Cellulose Acetate) are for intended for biological solution, high loading capacity and low protein binding. Sterile and non sterile both category available at axivafilters.com.
Nathan Goodyear

The effect of combined estrogen and progester... [Ann Intern Med. 2005] - PubMed - NCBI - 0 views

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    HRT, particularily estrogen therapy, is shown to increase mild to moderate flares of lupus.
Nathan Goodyear

Experimental study on the effect of vitamin C administration on lipid peroxidation and ... - 0 views

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    Rat model shows that vitamin C reduces oxidative damage from lead.  Thus, vitamin C provides antioxidant effect.
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