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Nathan Goodyear

Testosterone administration to men with testosterone deficiency syndrome after external... - 0 views

www.ncbi.nlm.nih.gov/...18671790

Testosterone low T low Testosterone men male hormones prostate cancer cancer saturation theory prostate

shared by Nathan Goodyear on 10 Oct 16 - No Cached
  • Nathan Goodyear on 10 Oct 16
     
    small study of men post prostate cancer radiotherapy: only 1 of the 5 had a transient rise in PSA, though the level was still below the 1.5 ng/ml threshold.  This fits within the saturation theory concept. F/u in this study was 14.5 months.  Abstract only available here.
Nathan Goodyear

Androgen deficiency and mitochondrial dysfunction: implications for fatigue, muscle dys... - 0 views

www.degruyter.com/...hmbci.2011.132.xml

men male hormone hormones androgens low T low Testosterone low T Testosterone insulin resistance IR diabetes metabolic syndrome obesity mortality disease cardiovascular

shared by Nathan Goodyear on 12 Aug 14 - No Cached
  • Nathan Goodyear on 12 Aug 14
     
    low Androgens, or low T to be specific, associated with insulin resistance, diabetes, metabolic syndrome, obesity, and mortality.
Nathan Goodyear

Hormonal Modulation in Aging Patients with Erectile Dysfunction and Metabolic Syndrome - 0 views

www.ncbi.nlm.nih.gov/...PMC3888699

low T Testosterone hypogonadism MetS metabolic syndrome men male hormone hormones

shared by Nathan Goodyear on 05 Feb 14 - No Cached
  • Hypogonadism and MetS are strongly associated [12, 13, 16], having even been demonstrated that with the increasing number of MetS parameters there is a proportional raise in the incidence of hypogonadism
  • increasing number of MetS components is inversely associated with T levels
  • the presence of MetS did not prove to be a significant determinant of hypogonadism, as it did not lead to a decline in T levels, in MetS patients with already established hypogonadism, the increasing number of MetS features was associated with further decline in T
  • ...15 more annotations...
  • In the setting of MetS, hypertriglyceridemia and increased WC have been reported as the most important determinants of hypogonadism
  • recent literature consistently associates obesity not only with higher risk of hypogonadism [4, 6, 27] but also with lower T levels
  • Visceral adiposity has been particularly related with reduction of T and SHBG levels (independent of other metabolic disorders)
  • WC was one of the MetS parameters with the greatest influence in T levels decrease, presenting itself as a strong risk factor for hypogonadism development
  • MetS-related T decline was not accompanied by an increase in pituitary LH levels, suggesting impairment in gonadotropin secretion
  • The molecules behind this smoothing compensatory effect of GnRH/LH are still unknown, but estrogens and insulin, as well as leptin, TNF-α, and other adipokines, were proposed candidates
  • fat stores undertake an increase aromatization of androgens, therefore raising estrogen levels [9, 15], which in turn decrease LH secretion
  • our data contradicts the concept that estradiol exerts a negative feedback on hypothalamic GnRH secretion
  • taking into account that high estradiol levels have already been described as the only abnormality in a subset of patients with ED, the hypothesis that the later might not only be caused by androgen deficiency is becoming increasingly evident
  • it has been reported that the chronic exposure to phosphodiesterase type 5 inhibitors (PDE5i), widely used for the treatment of ED, may influence serum estradiol levels
  • thyroid disorders (specially hyperthyroidism) have been related to ED and hypogonadism, and so must be considered in a sexual-dysfunction setting
  • It is clear from the current literature that collecting a more thorough hormonal panel might be a wise approach to further uncover hormonal relations
    • Nathan Goodyear
      Nathan Goodyear on 05 Feb 14
       
      outstanding point.  This hits to the point that Low T is the effect not the cause.
  • We concluded that in ED patients with hypogonadism and MetS, the attenuated response of HPG axis (normal or low LH levels) might not always be due to an underlying adiposity-dependent estrogen-raising effect.
  • our findings indicate that ED, aging, and estradiol might have a stronger connection than what is currently described in the literature.
  • this study underlines the importance of the collection of a full hormonal panel in ED men
  • Nathan Goodyear on 05 Feb 14
     
    low T strongly associated with metabolic syndrome in men.
Nathan Goodyear

Characteristics of Secondary, Primary, and Compensated Hypogonadism in Aging Men: Evide... - 0 views

press.endocrine.org/...jc.2009-1796

low T low Testosterone hypogonadism aging obesity men male hormone hormones

shared by Nathan Goodyear on 30 Mar 15 - No Cached
  • Circulating testosterone (T) in men declines progressively by 0.4–2% per year from the third decade onward
  • late-onset hypogonadism (LOH) (6, 7), whereas others have used various terms including andropause, male menopause, and androgen deficiency syndrome of the aging male.
    • Nathan Goodyear
      Nathan Goodyear on 30 Mar 15
       
      all names for Low T--interesting
  • Secondary hypogonadism is associated with obesity (and potentially reversible) independently of age
  • ...2 more annotations...
  • primary hypogonadism (probably the genuine form of LOH) is strongly associated with age
  • Compensated hypogonadism represents a distinct clinical entity that warrants continued monitoring to prevent or preempt further deterioration
  • Nathan Goodyear on 30 Mar 15
     
    Study divides low T into primary (age), secondary (weight), and compensated hypogonadism (elevated LH with normal T)
Nathan Goodyear

[Functional states of pituitary-ovary, adrenal and... [Zhonghua Fu Chan Ke Za Zhi. 1998... - 0 views

www.ncbi.nlm.nih.gov/...10682483

PCOS LH insulin hypothyroidism androgens testosterone resistance

shared by Nathan Goodyear on 17 Dec 10 - No Cached
  • CONCLUSION: It appears that ovarian androgen excess in women with PCOS is mainly LH-dependent in Group 1 and insulin-dependent in Group 2. Enhanced adrenal activity may contribute to both hyperandrogenism and insulin resistance in this syndrome, and subclinical hypothyroidism may exist in affected subjects, especially of Group 1.
  • Nathan Goodyear on 17 Dec 10
     
    PCOS is not a birth control pill deficiency, but a complex hormonal imbalance
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