Thymidine kinase 1 (TK1) is a proliferation biomarker
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Nuclear TK1 expression is an independent prognostic factor for survival in pre-malignan... - 0 views
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TK1 LI was found to be a more reliable prognostic marker for 5-year survival than pathological stages, FIGO stages and Ki-67,
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nuclear TK1 expression is a reliable prognostic factor in CIN patients, a group of cervical lesion patients that respond positively to treatment
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low TK1 expression in the tumors in these patients might indicate that these tumors have a lower proliferation rate
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TK1 is a key kinase in the one-step salvage pathway by which thymidine is introduced into DNA via the salvage pathway
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TK1 participates in DNA synthesis and is therefore closely related to the S-phase of the cell cycle, and is correlated with proliferation
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TK1 intensity (TK1 synthesis rate) increases from CIN grade I to CIN grade III, but does not further increase in invasive cervical carcinomas.
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TK1 intensity seems to be a prognostic factor particularly when pre-malignant cervical lesions progress to malignancy
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Differential Effects of Dehydroepiandrosterone and Testosterone in Prostate and Colon C... - 0 views
press.endocrine.org/...en.2012-2249
testosterone prostate colon colon cancer cancer NGF nerve growth factor dhea dehydroepiandrosterone
shared by Nathan Goodyear on 19 Nov 14
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Several studies indicate that DHEA may enhance cancer-promoting activities in several prostate cancer cell lines acting as agonist or antagonist for the intracellular AR
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the estrogenic metabolites of DHEA, 5a-androstane-3b, 17b-diol (3b-Adiol) and E2 bind to estrogen receptors but not to AR
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Different members of neurotrophins are expressed during cancer progression, suggesting their involvement in cell proliferation, anoikis protection, and malignancy
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Regulation of the apoptotic machinery in prostate and colon cancer cells by testosterone occurs rapidly and is initiated at the plasma membrane level through specific membrane-binding sites not involving the classical cytoplasmic AR
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testosterone antagonizes the prosurvival effects of DHEA in neuronal cells, blocking its binding to NGF receptors
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elevated levels of DHEA or its sulfate ester DHEA-sulfate in young adults are associated to low incidence of androgen-dependent tumors
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The decline of DHEA with aging may contribute to prostate cancer progression associated with advanced age
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DHEA is an effective antiapoptotic factor, reversing the serum deprivation-induced apoptosis in prostate cancer cells (DU145 and LNCaP cell lines) as well as in colon cancer cells
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exposure of prostate DU145 and colon Caco2 cancer cells to testosterone totally blocked the protective effects of both DHEA and NGF. These findings suggest that testosterone acts as an antagonist of DHEA and NGF
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These findings support the hypothesis that testosterone may inhibit cancer cell growth by antagonizing the proliferative, antiapoptotic effects of endogenous factors, such as DHEA or NGF, in the case of prostate and colon cancer cells
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Testosterone level in men with type 2 diabetes mellitus and related metabolic... - 0 views
www.ncbi.nlm.nih.gov/...PMC4364844
low T low Testosterone Diabetes Testosterone men male hormones metabolic syndrome
shared by Nathan Goodyear on 30 Mar 15
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defined by consistent symptoms and signs of androgen deficiency, and an unequivocally low serum testosterone level
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the threshold serum testosterone level below which adverse clinical outcomes occur in the general population is not known
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most population-based studies use the serum testosterone level corresponding to the lower limit, quoted from 8.7 to 12.7 nmol/L, of the normal range for young Caucasian men as the threshold
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Researchers tried to examine whether serum total or free testosterone would be a better/more reliable choice when studying the effect of testosterone. The results were mixed. Some reported significant associations of both serum total and free testosterone level with clinical parameters25, whereas others reported that only serum free testosterone26 or only serum total testosterone6 showed significant associations.
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−0.124 nmol/L/year in serum total testosterone
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In experimental studies, androgen receptor knockout mice developed significant insulin resistance rapidly
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In mouse models, testosterone promoted differentiation of pluripotent stem cells to the myogenic lineage
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testosterone decreased insulin resistance by enhancing catecholamine induced lipolysis in vitro, and reducing lipoprotein lipase activity and triglyceride uptake in human abdominal tissue in vivo
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testosterone regulated skeletal muscle genes involved in glucose metabolism that led to decreased systemic insulin resistance
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In the liver, hepatic androgen receptor signaling inhibited development of insulin resistance in mice
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independent and inverse association of testosterone with hepatic steatosis shown in a cross-sectional study carried out in humans
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Although a low serum testosterone level could contribute to the development of obesity and type 2 diabetes through changes in body composition, obesity might also alter the metabolism of testosterone
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In obese men, the peripheral conversion from testosterone to estrogen could attenuate the amplitude of luteinizing hormone pulses and centrally inhibit testosterone production
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leptin, an adipokine, has been shown to be inversely correlated with serum testosterone level in men
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Leydig cells expressed leptin receptors and leptin has been shown to inhibit testosterone secretion, suggesting a role of obesity and leptin in the pathogenesis of low testosterone
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Baltimore Longitudinal Study of Aging (BLSA) cohort made up of 3,565 middle-class, mostly Caucasian men from the USA, the incidence of low serum total testosterone increased from approximately 20% of men aged over 60 years, 30% over 70 years, to 50% over 80 years-of-age
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As the binding of testosterone to albumin is non-specific and therefore not tight, the sum of free and albumin-bound testosterone is named bioavailable testosterone, which reflects the hormone available at the cellular level
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alterations in SHBG concentration might affect total serum testosterone level without altering free or bioavailable testosterone
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A significant, independent and longitudinal effect of age on testosterone has been observed with an average change of −0.124 nmol/L/year in serum total testosterone28. The same trend has been shown in Europe and Australia
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Asian men residing in HK and Japan, but not those living in the USA, had 20% higher serum total testosterone than in Caucasians living in the USA, as shown in a large multinational observational prospective cohort of the Osteoporotic Fractures in Men Study
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subjects with chronic diseases consistently had a 10–15% lower level compared with age-matched healthy subjects
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In Caucasians, the mean serum total testosterone level for men in large epidemiological studies has been reported to range from 15.1 to 16.6 nmol/L
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Chinese middle-aged men reported a similar mean serum testosterone level of 17.1 nmol/L in 179 men who had a family history of type 2 diabetes and 17.8 nmol/L in 128 men who had no family history of type 2 diabetes
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HK involving a cohort of 1,489 community-dwelling men with a mean age of 72 years, a mean serum total testosterone of 19.0 nmol/L was reported
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pro-inflammatory factors, such as tumor necrosis factor-α in the testes, could locally inhibit testosterone biosynthesis in Leydig cells47, and testosterone treatment in men was shown to reduce the level of tumor necrosis factor-α
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In Asians, a genetic deletion polymorphism of uridine diphosphate-glucuronosyltransferase UGT2B17 was associated with reduced androgen glucuronidation. This resulted in higher level of active androgen in Asians as compared to Caucasians, as Caucasians' androgen would be glucuronidated into inactive forms faster.
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Compared with Caucasians, the frequency of this deletion polymorphism of UGT2B17 was 22-fold higher in Asian subjects
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Other researchers have suggested that environmental, but not genetic, factors influenced serum total testosterone
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The basal and ligand-induced activity of the AR is inversely associated with the length of the CAG repeat chain
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In the European Male Aging Study, increased estrogen/androgen ratio in association with longer AR CAG repeat was observed
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a smaller number of AR CAG repeat had been shown to be associated with benign prostate hypertrophy and faster prostate growth during testosterone treatment
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the odds of having a short CAG repeat (≤17) were substantially higher in patients with lymph node-positive prostate cancer than in those with lymph node-negative disease or in the general population
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assessing the polymorphism at the AR level could be a potential tool towards individualized assessment and treatment of hypogonadism.
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In elderly men, there was reduced testicular response to gonadotropins with suppressed and altered pulsatility of the hypothalamic pulse generator
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a significant, independent and longitudinal effect of age on serum total testosterone level had been observed
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A significant graded inverse association between serum testosterone level and insulin levels independent of age has also been reported in Caucasian men
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most studies showed that changes in serum testosterone level led to changes in body composition, insulin resistance and the presence of MES, the reverse might also be possible
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MES predicted a 2.6-fold increased risk of development of low serum testosterone level independent of age, smoking and other potential confounders
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Other prospective studies have shown that development of MES accelerated the age-related decline in serum testosterone level
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In men with type 2 diabetes, changes in serum testosterone level over time correlated inversely with changes in insulin resistance
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weight loss by either diet control or bariatric surgery led to a substantial increase in total testosterone, especially in morbidly obese men, and the rise in serum testosterone level was proportional to the amount of weight lost
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To date, published clinical trials are small, of short duration and often used pharmacological, not physiological, doses of testosterone
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In the population-based Osteoporotic Fractures in Men Study cohort from Sweden, men in the highest quartile of serum testosterone level had the lowest risk of cardiovascular events compared with men in the other three quartiles (hazard ratio [HR] 0.70
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low serum total testosterone was associated with a significant fourfold higher risk of cardiovascular events when comparing men from the lowest testosterone tertile with those in the highest tertile
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Shores et al. were the first to report that low serum testosterone level, including both serum total and free testosterone, was associated with increased mortality
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low serum total testosterone increased all-cause (HR 1.35, 95% CI 1.13–1.62, P < 0.001) and cardiovascular mortality (HR 1.25
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European Association for the Study of Diabetes 2013 suggested there was an inverse relationship between serum testosterone level and acute myocardial infarction
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Diabetic men in the highest quartile of serum total testosterone had a significantly reduced risk of acute MI when compared with those in the lower quartiles
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serum total testosterone level in the middle two quartiles at baseline predicted reduced incidence of death compared with having the highest and lowest levels
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Nice review of Testosterone levels and some of the evidence linking Diabetes with low T. However, the conclusion by the authors regarding what is causing the low T in men with Diabetes is baffling. The literature does not point to one cause, it is clearly multifactorial--obesity, inflammation, high aromatase activity...I would suggest the authors continue their readings in the manner.
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5 key factors to help lose some good weight with in few days - 0 views
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Using Multicountry Ecological and Observational Studies to Determine Dietary Risk Facto... - 0 views
www.tandfonline.com/...07315724.2016.1161566
alzheimer's disease Alzheimers nutrition diet western diet
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Effects of dietary polyphenols on neuroregulatory factors and pathways that mediate foo... - 0 views
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Serum Leptin, Parathyroid Hormone, 1,25-Dihydroxyvitamin D, Fibroblast Growth Factor 23... - 0 views
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Food intolerance: a major factor in the pathogenesis ... [Lancet. 1982] - PubMed - NCBI - 0 views
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Low testosterone level as a predictor of cardiovascular events in Japanese men with cor... - 0 views
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Male hypogonadism and metabolic syndrome. [Andrologia. 2014] - PubMed - NCBI - 0 views
www.ncbi.nlm.nih.gov/...25040289
low T low Testosterone low T Testosterone metabolic syndrome men male hormone hormones
shared by Nathan Goodyear on 22 Jul 14
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male hypogonadism was an independent risk factor for MS (P < 0.001). We conclude that low testosterone level plays a central role in the development of metabolic syndrome
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DHA dietary supplementation enhances the effects of exercise on synaptic plasticity and... - 0 views
www.ncbi.nlm.nih.gov/...PMC3208643
DHA n-3 omega 3 omega-3 fish oil cognition memory hippocampus exercise neuroplasticity BDNF brain derived neurotrophic factor lipid peroxidation
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Acetyl-L-carnitine treatment increases choline ace... [Brain Res. 1994] - PubMed - NCBI - 0 views
www.ncbi.nlm.nih.gov/...8137174
Acetyl-L-carnitine carnitine brain acetylcholine nerve growth factor
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Association between endogenous sex steroid hormones and inflammatory biomarkers in US men - 0 views
www.ncbi.nlm.nih.gov/...PMC3812341
low Testosterone Estrogen Estradiol low T Testosterone hormone hormones CRP inflammation SHBG WBC men male
shared by Nathan Goodyear on 28 Apr 15
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modest statistically significant inverse associations for total and calculated free testosterone, and modest positive associations for total and calculated free estradiol with CRP concentration
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These findings are consistent with the hypothesis that in men higher androgen concentration is anti-inflammatory, and higher estrogen concentration is pro-inflammatory.
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the probability of elevated CRP concentrations (≥ 3 mg/L) decreased with higher total and calculated free testosterone concentrations, while the probability increased with higher total and calculated free estradiol concentrations
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Studies have shown that the induction of hypogonadism in older men is followed by a significant increase in IL-6 concentrations (Khosla et al. 2002), a potent stimulator of inflammation, and that activation of the androgen receptor exerts a direct anti-inflammatory effect
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It has been suggested that the mechanisms for the immunosuppressive effect of androgens could be either a direct effect on the expression of inflammatory genes (Bellido et al. 1995; Asirvatham et al. 2006), or an indirect effect through inhibition of nuclear factor-kB activation
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Estradiol is the major biologically active estrogen, and about 80% is formed in adult men from the aromatization of testosterone primarily in the adipose tissue
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Most prior cross-sectional studies have observed inverse associations between androgen concentrations and inflammatory biomarkers
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A recent study in Chinese men showed that lower concentrations of total and calculated free testosterone were associated with higher CRP concentration
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Data from the Boston Area Community Health Survey also reported inverse associations between testosterone and CRP concentrations
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Total testosterone was inversely associated with WBC count (Tang et al. 2007; Schneider et al. 2009; Brand et al. 2012), but calculated free testosterone was not associated with WBC
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The first trial found a decrease in CRP, interleukin-1β (IL-1β), and tumor necrosis factor-α (TNFα) but no changes in IL-6 and IL-10 concentrations between the active treatment and placebo arms
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the majority of studies in the literature have not observed statistically significant associations between estradiol and inflammatory biomarkers in men, although several of them observed point estimates in the positive direction
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total testosterone and estradiol compete for binding to SHBG, and seem to have opposite effects on the concentration of inflammatory biomarkers
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A small randomized controlled trial of estrogen replacement therapy in prostate cancer patients showed an increase in CRP in the active treatment group versus the comparator group
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Obese men are known to have lower androgen concentrations compared to their normal-weight counterparts
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The strongest suggestion of an interaction was the inverse association between androstanediol glucuronide and CRP concentrations in obese participants, while the association was positive in the non-obese
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A recent Chinese cross-sectional study observed stronger inverse associations between total testosterone and CRP concentrations in individuals with a BMI of 27.5 kg/m2 or greater
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our results suggest that total and calculated free testosterone are modestly inversely associated with CRP concentrations, and that total and calculated free estradiol are modestly positively associated with CRP and WBC
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Study results suggest that higher Testosterone and lower Estrogen levels provide anti-inflammatory effects in men. The inflammatory biomarker assessed here was CRP. Low total and calculated free Testosterone was associated with an increase in CRP. In contrast, total and free Estrogen was associated with an increase in CRP. Estradiol increased WBC count and SHBG was inversely related to WBC count in this study.
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Plasma Homocysteine as a Risk Factor for Dementia and Alzheimer's Disease - NEJM - 0 views
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Neuron - Epigenetic Status of Gdnf in the Ventral Striatum Determines Susceptibility an... - 0 views
www.cell.com/...S0896627310010718
stress depression methylation glial cell-derived neurotrophic factor Gdnf
shared by Nathan Goodyear on 10 Oct 11
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How you respond to stress is a reflection of your genetics and environment. The bodies ability to express genes, such as the glial cell-derived neurotrophic factor, impacts an individual's expression in the face of stress. You have a genetic predisposition, but with poor methylation you end up with more depression in the presence of stress
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ScienceDirect - Trends in Pharmacological Sciences : Pharmacological basis for the role... - 0 views
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Extensive research within the past two decades has shown that curcumin mediates its anti-inflammatory effects through the downregulation of inflammatory transcription factors (such as nuclear factor κB), enzymes (such as cyclooxygenase 2 and 5 lipoxygenase) and cytokines (such as tumor necrosis factor, interleukin 1 and interleukin 6)
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Nutrapharmacology of Tocotrienols for Metabol... [Curr Pharm Des. 2011] - PubMed - NCBI - 0 views
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This review evaluates the effects of tocotrienols on the risk factors of metabolic syndrome using data from human, animal and in vitro studies. Tocotrienols improved lipid profiles and reduced atherosclerotic lesions, decreased blood glucose and glycated hemoglobin concentrations, normalized blood pressure, and inhibited adipogenesis.
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