The role of gonadotropins in testicular and adrenal androgen biosynthesis pathways-Insights from males with congenital hypogonadotropic hypogonadism on hCG/rFSH and on testosterone replacement.
congenital hypogonadotropic hypogonadism
gonadotropins
hCG/ rFSH
steroid hormone profiles
steroidogenesis
testosterone
Journal
Clinical endocrinology
ISSN: 1365-2265
Titre abrégé: Clin Endocrinol (Oxf)
Pays: England
ID NLM: 0346653
Informations de publication
Date de publication:
01 2021
01 2021
Historique:
received:
07
04
2020
revised:
03
08
2020
accepted:
06
08
2020
pubmed:
2
9
2020
medline:
19
8
2021
entrez:
2
9
2020
Statut:
ppublish
Résumé
To delineate the role of gonadotropins in male androgen biosynthesis pathways. Case-control study. Twenty five males with congenital hypogonadotropic hypogonadism (CHH) underwent hCG/rFSH and testosterone treatment sequentially. Serum steroid hormone profiles (testosterone precursors and metabolites) on both replacement regimens were analysed, using liquid chromatography-tandem mass spectrometry (LC-MS/MS) and compared to those of healthy controls, matched by age, BMI and serum testosterone. On testosterone replacement, serum concentrations of the classic Δ4 pathway hormones progesterone and 17-hydroxy-progesterone (17-OHP), and the marker steroid of an alternative pathway of testosterone synthesis (androstenediol) were decreased, compared to controls. Androstanediol, a marker of the backdoor pathway of dihydrotestosterone (DHT) synthesis, was increased. 17-OH-pregnenolone, androstenedione and DHEAS (Δ5 pathway), three 11-oxygenated C19 androgens (11-keto-A4, 11-keto-T and 11-keto-DHT) and the testosterone (T) metabolites DHT and 17ß-oestradiol (E2) were similar to controls. On gonadotropin replacement, 17-OHP, 17-OH-pregnenolone, DHEAS and androstenedione, as well as DHT, androstenediol, and all 11-oxygenated C19 androgens were normal. Progesterone (Δ4 pathway) was slightly decreased, and androstanediol (backdoor DHT pathway) and E2 (T metabolite) were increased. In males with CHH, serum steroid hormone profiles resemble those of healthy men, if hCG/rFSH is used for substitution. Gonadotropins contribute to steroid hormone production along the classic Δ4 pathway and co-activate an alternative pathway of testosterone biosynthesis via androstenediol. Backdoor DHT biosynthesis, Δ5 17-OH-pregnenolone, DHEA(S) and androstenedione synthesis and 11-oxygenated C19 androgen production are activated independently of gonadotropins. The androgen replacement modality used for treatment of hypogonadal males with absent or reduced endogenous LH/FSH secretion may impact on long-term health and quality of life.
Substances chimiques
Androgens
0
Gonadotropins
0
Testosterone
3XMK78S47O
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
90-101Informations de copyright
© 2020 The Authors. Clinical Endocrinology published by John Wiley & Sons Ltd.
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