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Nathan Goodyear

Oral estrogen antagonizes the metabolic actions of growth hormone in growth hormone-def... - 0 views

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    One really wonders if estrogen should ever be given orally at all.  Though this study is small, this is consistent with other studies that show that estrogen therapy, particularly oral therapy interferes with growth hormone signaling and thus action.  Oral estrogen decreases IGF-1, increases growth hormone binding protein, lowers metabolism and reduces protein metabolism as monitored by leucine turnover.
Nathan Goodyear

Is Timing Everything? New Insights into Why the Effect of Estrogen Therapy on Memory Mi... - 0 views

  • Women who have an oophorectomy before the normal age at menopause show an increased risk for cognitive impairment or dementia later in life unless they are treated with estrogen until the normal age at menopause
  • SIRT1 has been implicated in the disruption of mitochondrial bioenergenetics in Alzheimer's disease and mild cognitive impairment
  • the increase in dementia observed with CEE/MPA rather than CEE alone suggests potential deleterious effects of MPA on brain function in older women
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  • SIRT 1 as a potential mediator of the impact of E2
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    Early estrogen therapy in perimenopause and early menopause, with Estradiol, provides more health benefits than later therapy.  This article looked at Estrogen's effects on a woman's brain.  This likely has its origins in the change in estrogen receptors. The signal is not changing, but the reception of that signal is.  How else can one explain a different response to the same hormone dosage?
Nathan Goodyear

Effects of estrogen on memory funct... [Psychoneuroendocrinology. 1992] - PubMed - NCBI - 0 views

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    estrogen therapy in surgical menopause preserves memory.  Rapid decline in estrogen levels post surgical menopause is associated with cognitive/memory decline.  Versus placebo, estrogen therapy preserved memory function.
Nathan Goodyear

Association between endogenous sex steroid hormones and inflammatory biomarkers in US men - 0 views

  • modest statistically significant inverse associations for total and calculated free testosterone, and modest positive associations for total and calculated free estradiol with CRP concentration
  • Estradiol concentrations were also weakly positively associated with WBC count
  • SHBG was weakly inversely associated with WBC
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  • An association between testosterone and WBC count was not observed
  • These findings are consistent with the hypothesis that in men higher androgen concentration is anti-inflammatory, and higher estrogen concentration is pro-inflammatory.
  • 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
  • there is ample evidence supporting the immunosuppressive effect of androgens
  • The incidence of autoimmune diseases is higher in androgen-deficient men
  • 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
  • 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
  • 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
  • estrogen can stimulate the transcription factor C/EBP-β, which is involved in CRP transcription
  • Most prior cross-sectional studies have observed inverse associations between androgen concentrations and inflammatory biomarkers
  • A recent study in Chinese men showed that lower concentrations of total and calculated free testosterone were associated with higher CRP concentration
  • Data from the Boston Area Community Health Survey also reported inverse associations between testosterone and CRP concentrations
  • 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
  • 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
  • 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
  • total testosterone and estradiol compete for binding to SHBG, and seem to have opposite effects on the concentration of inflammatory biomarkers
  • 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
  • Obese men are known to have lower androgen concentrations compared to their normal-weight counterparts
  • 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
  • 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
  • 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.
Nathan Goodyear

Administration route-dependent effects of estrogens on IGF-I levels during fixed GH rep... - 0 views

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    oral estrogen therapy decreased IGF-1 concentrations in those women taking growth hormone, requiring high dosing of HGH versus that in women using estrogen through a transdermal approach.
Nathan Goodyear

Does hormone therapy affect blood pressure changes... [Menopause. 2013] - PubMed - NCBI - 0 views

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    The author's conclusion of this study found no difference in decline in blood pressure with/without estrogen therapy.  However, if you look at the results, the nonusers of estrogen did not have a decline in systolic blood pressure as in the users of estrogen.  So, I don't know where that conclusion comes from.  This study looked at lifestyle changes.  This study also found no benefit of metformin in blood pressure
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.
Nathan Goodyear

Cognitive effects of estradiol after menopause - 0 views

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    No benefit to memory for post menopause women with estradiol therapy.  This study looked at early and late menopause estrogen therapy.  The study also found no harm.  Only abstract available here.  These studies would do more scientific benefit if they would follow hormone levels.  This study did not touch on dementia; other studies have shown benefit from estrogen therapy  in preventing dementia in women.
Nathan Goodyear

Hospitalization for pulmonary embolism associated with antecedent testosterone or estro... - 0 views

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    Testosterone use in men with PE is rare: 5% in this study and 1.2% in previous study by same authors. Procoagulant thrombophilia is rare, yet the authors still suggested procoagulant tests prior to Testosterone therapy in men, Estrogen therapy in women and oral birth control in women.
Nathan Goodyear

A randomized, open-label, crossover study ... [Menopause. 2007 Nov-Dec] - PubMed - NCBI - 0 views

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    oral estrogen is a bad choice as it relates to BHRT or HRT for that matter.  Compared to transdermal estrogen, oral estrogen through increasing TBG and slowed liver metabolism results in decreased thyroid hormone production.  
Nathan Goodyear

Influence of Sex Hormones on Melanoma - 0 views

  • Men show lower skin levels of ERβ than women, in whom ERβ expression decreases with age and more rapidly after menopause as a result of loss of estradiol-positive feedback
  • lower ERβ (mRNA and protein) levels in thicker, more invasive melanomas
  • melanoma ERβ levels correlated with both the tumor microenvironment and the depth of invasion
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  • Recent immunohistochemical analyses of ERβ protein level in melanoma tissues15,16 have shown that ERβ protein expression decreases with increasing Breslow thickness—the most important independent prognostic factor in melanoma.
  • As in breast cancer, we maintain that ERα and ERβ status also has to be determined in melanoma with the aim of identifying those displaying a high ERα/ERβ ratio
  • An ideal hormone therapy in melanoma should selectively block the proliferative ERα protein and promote the antiproliferative action of ERβ
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    Melanoma is a known estrogen sensitive cancer.  This study finds ER Beta loss correlates with thickness of lesion.  The authors propose ERalpha/ERbeta ratio be assessed.  ERbeta has been shown to decrease proliferation, promotes differentiation, and decrease inflammation in breast studies.  In contrast, ERalpha promotes proliferation, decreases differentiation, and promotes inflammation.  Here, the same effects seem to apply to melanoma. Of interesting note, men have lower skin ERbeta than women and ERbeta declines with age and menopause in women.  Essentially, the loss of the ability to differentiate, decrease proliferation and inflammation  occurs with increase estrogen stimulus--set up for estrogen promoting cancers.
Nathan Goodyear

The use of estrogen in older women. [Clin Geriatr Med. 2003] - PubMed - NCBI - 0 views

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    Estrogen therapy in "older" women slows the physiologic effects of aging.  This study specifically highlights the effects of low estrogen and neurodegeneration of the brain.
Nathan Goodyear

Vascular Aging in Women: is Estrogen the Fountain of Youth? - 0 views

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    Estrogen improves vascular function in postmenopausal women.  The mechanism of action is through the increased nitric oxide production with estrogen therapy.  This increase in nitric oxide reduces endothelial dysfunction.
Nathan Goodyear

Study Finds Estrogen Therapy Improves Depression and Anxiety in Recently Menopausal Wom... - 0 views

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    Estrogen therapy in women recently postmenopausal, found to improve symptoms of depression and anxiety.  The mean age of women in this study was 52.7.  Average age of menopause is 51, so apprx 1 year postmenopausal in this study.  Both premarin and bioidentical estradiol was used in different arms of the study.  Bioidentical progesterone was used in all 3 arms.
Nathan Goodyear

Estrogen, Menopause, and the Aging Brain: How Basic Neuroscience Can Inform Hormone The... - 0 views

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    Estrogen and the aging brain of a women.  Good review of the science of how estrogen effects the neurological system of the woman.
Nathan Goodyear

Crossroads of Estrogen Receptor and NF-{kappa}B Signaling -- Biswas et al. 2005 (288): ... - 0 views

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    This study looked at estrogen receptors and breast cancer.  But, they found anti estrogen therapy might actually increase NF-KappB activity i.e.inflammation.  In contrast, ER inhibited NF-kappaB and resultant inflammation.
Nathan Goodyear

Longitudinal and cross-sectional rel... [J Clin Endocrinol Metab. 2014] - PubMed - NCBI - 0 views

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    This study found that lower TT and E1 associated with more "poor health" as defined by questionnaire.  The conclusion might lead one to think that Estrogen therapy is need in men.  Eightly percent of estrogen production in men occurs from Testosterone.  If Testosterone declines, then estrogen production will likewise decline.  A simple fact that the authors did not comment on.  Also, E1 binds with high affinity to ER alpha, which is pro-inflammatory and pro-proliferative: neither of which is a positive health benefit.   This appears to point more to a broad HPA suppression as an association to the "poor health".
Nathan Goodyear

PLOS ONE: Increased Risk of Non-Fatal Myocardial Infarction Following Testosterone Ther... - 0 views

  • For all TT prescription subjects combined, the post/pre prescription rate ratio for MI (RR)was 1.36
  • In men aged 65 years and older the RR was 2.19 (1.27, 3.77), while in men under age 65 years the RR was 1.17
  • increasing RR with increasing age.
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  • The RRs were 0.95 (0.54, 1.67) under 55 years
  • 1.35 (0.77, 2.38) at 55–59
  • 1.29 (0.71, 2.35) at 60–64,
  • 1.35 (0.44, 4.18) at 65–69, 1.62
  • 3.43 (1.54, 7.66) at 75 years and older
  • The adjusted post/pre RR for PDE5I across all ages was 1.08
  • For TT prescription, in men under age 65 years, the RR was 2.90 (1.49, 5.62) for those with a history of heart disease and 0.90 (0.61, 1.34) for those without
  • In men aged 65 year and older, the RR was 2.16 (0.92, 5.10) for those with a history of heart disease and 2.21 (1.09, 4.45) for those without.
  • Among men aged 65 years and older, we observed a two-fold increase in the risk of MI in the 90 days after filling an initial TT prescription
  • Among younger men with a history of heart disease, we observed a two to three-fold increased risk of MI in the 90 days following an initial TT prescription and no excess risk in younger men without such a history
  • Among older men, the two-fold increased risk was associated with TT prescription regardless of cardiovascular disease history
  • our own findings appear consistent with a higher frequency of thrombotic events following TT prescription among men with more extensive coronary vascular disease.
  • Our findings are consistent with a recent meta-analysis of placebo-controlled randomized trials of testosterone therapy lasting 12 or more weeks among mainly older men, which reported that testosterone therapy increased the risk of adverse cardiovascular-related events (OR = 1.54, 95%CI:1.09, 2.18), as well as serious adverse cardiovascular-related events (OR = 1.61, 95%CI:1.01, 2.56) which included myocardial infarction along with other conditions
  • This association appeared unrelated to average baseline testosterone level (p = 0.70) but varied by source of funding (p = 0.03), with a stronger summary effect in a meta-analysis of studies not funded by the pharmaceutical industry (OR = 2.06, 95%CI:1.34, 3.17) compared with studies funded by the pharmaceutical industry
    • Nathan Goodyear
       
      This supports prior analysis that studies done by pharmaceutical corps will be more favorable to their product(s) than those independently funded.  This is called bias.
  • the evidence supports an association between testosterone therapy and risk of serious, adverse cardiovascular-related events–including non-fatal myocardial infarction–in men
  • there is some evidence that low endogenous testosterone levels may also be positively associated with cardiovascular events
  • effects of endogenous and exogenous testosterone may differ. Exogenous testosterone (TT) is associated with physiologic changes that predispose to clotting and thrombotic disorders including increased blood pressure [18], polycythemia [19], reductions in HDL cholesterol [18], [20], and hyperviscosity of the blood and platelet aggregation. [20]–[23]; TT also increases circulating estrogens [24], [25] which may play a role in the observed excess of adverse cardiovascular-related events, given that estrogen therapy has been associated with this excess in both men and women
  • did not include information on the serologic or diagnostic indications for treatment.
  • no association between PDE5I prescriptions and the risk of MI
  • Recently TT has been increasing extraordinarily rapidly, including among younger men and among those without hormone measurement
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    New cohort study finds increased risk of Testosterone in men > 65 and those : these are based in marketing-based medicine not evidence based medicine.
Nathan Goodyear

A role for estrogen receptor β in the regulation of growth of the ventral pro... - 0 views

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    Estrogen receptor beta shown to be a potential site of application of therapy to treat BPH and prostate cancer.  
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.
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