title: [Decrease in circulating androgens in men during senescence].
abstract: It has been reported that circulating androgens exhibit a decrement with aging in men; however, there are some controversial results. We have carried out a descriptive study in a group of men aged 60-70 years. In order to determine levels of androgens In serum, the results were compared with those obtained in another group in normal men 20-44 years of age. Measurements included circulating levels of testosterone(T), dehydroepiandrosterone sulfate (DHEA-S), LH, FSH, estradiol (E), ACTH, prolactin (PRL), IGF-1, and SHBG. The group of older men group showed a significative decrement of T and DHEA-S, as well as E. An increment of FSH and LH without changes of ACTH, cortisol and SHBG was demonstrated. Collaterally, PRL and IGF-1 decreased in aging men. The present data demonstrated a significant decrement of circulating androgens, both T and DHEA-S coinciding with elevation of gonadotropins. It is concluded that aging is accompanied by changes of a decrement of androgens, of gonads, and adrenal origin. Further studies will investigate the effect of testosterone replacement in aging men.
authors.affiliation: Unidad de Investigación en Enfermedades Endocrinas, Hospital de Especialidades, Instituto Mexicano del Seguro Social, México D.F.
authors.forename: R P
authors.initials: RP
authors.lastname: Saucedo
authors.forename: M E
authors.initials: ME
authors.lastname: Fonseca
authors.forename: L
authors.initials: L
authors.lastname: Basurto
authors.forename: R
authors.initials: R
authors.lastname: Ochoa
authors.forename: M
authors.initials: M
authors.lastname: Sánchez
authors.forename: A
authors.initials: A
authors.lastname: Zárate
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging / Q000097:blood*; D000728:Androgens / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values
chemical_list: D000728:Androgens