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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Observations on the role of GH/IGF-1 and sex hormone binding globulin (SHBG) in the pubertal development of growth hormone deficient (GHD) children.

SHBG concentrations in GHD and non GHD children of both sexes were studied in relation to their weight and androgen status. SHBG was inversely related to age in short and control children, but not for GHD. Correction for body weight restored the inverse relationship in these children and improved the correlation for the other groups. DHAS concentrations were similar in GHD and short children, suggesting GH per se does not influence adrenal androgen synthesis. The mean free testosterone in GHD children 12.7 pmol/L, was similar to that in short children, 14.3 pmol/L, and lower than controls 21.2 pmol/L, but consistent with their pubertal status. The linear regression of SHBG on IGF-1 was r = -0.605 (P less than 0.01). It was postulated that IGF-1 and free testosterone may regulate SHBG synthesis. Administration of native and synthetic GH to prepubertal GHD children lowered SHBG without a significant change in TBG, albumin or free testosterone. The fall in SHBG concentration after HGH in GHD children is suggested as a selective mechanism which may lead to improved pubertal development.[1]


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