Stimulatory effect of follicle-stimulating hormone on basal and luteinizing hormone-stimulated testosterone secretions by the fetal rat testis in vitro
| Autor: | Christine Levacher, René Habert, C. Gautier, Virginie Rouiller-Fabre, L Lecerf, J M Saez |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Male
medicine.medical_specialty medicine.drug_class Testicle Biology Follicle-stimulating hormone Organ Culture Techniques Endocrinology Internal medicine Testis medicine Animals Testosterone Rats Wistar Fetus Antibodies Monoclonal Luteinizing Hormone Recombinant Proteins Culture Media Rats medicine.anatomical_structure Female Follicle Stimulating Hormone Gonadotropin Drug Contamination Luteinizing hormone Follicle-stimulating hormone receptor Hormone |
| Zdroj: | Endocrinology. 133:2313-2318 |
| ISSN: | 1945-7170 0013-7227 |
| Popis: | The in vitro effect of FSH on testosterone secretion by the fetal rat testis was studied. Testes were cultured in the presence or absence of either commercial human (h) FSH (Metrodine; 200 mIU/ml) or recombinant hFSH (200 mIU/ml) for 3 days and with 100 ng/ml ovine LH during the last 4 h of culture. To avoid a stimulatory effect by the 0.4% LH that contaminates Metrodine, the cultures were performed in the presence of a monoclonal anti-hLH beta antibody and with a concentration of Metrodine that had no short term stimulatory effect on testosterone production by the fetal testes in vitro. Metrodine treatment had a positive long term effect on both basal and LH-stimulated testosterone secretion by fetal testes explanted on days 18.5, 20.5, and 22.5 postconception, which was abolished by the addition of a monoclonal anti-hFSH beta antibody. LH-free recombinant FSH also augmented basal and LH-stimulated testosterone secretion of testes explanted on days 13.5, 14.5, and 18.5 postconception. The positive effect of recombinant hFSH appeared during the second day of treatment with day 14.5 and 18.5 testes and on the third day of treatment with day 13.5 testes. As it is widely accepted that FSH receptors are exclusively localized on Sertoli cells, these results suggest that on or before day 15.5 of fetal life, 1) Sertoli cells are able to respond to FSH, 2) Sertoli cells can produce factors that are able to act on Leydig cell function, and 3) Leydig cells are sensitive to FSH-induced Sertoli cell factors. In conclusion, this study points out a potential paracrine control of fetal Leydig cell function and/or differentiation by fetal Sertoli cells as soon as fetal Leydig cells differentiate. |
| Databáze: | OpenAIRE |
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