Effects of follicle-stimulating hormone and vitamin A upon purinergic secretion by rat Sertoli cells.
Follicle-stimulating hormone (FSH) and vitamin A (retinol) are two of the main regulators of the male reproductive system. Recently, it has been described that extracellular purines can affect some important reproductive-related functions in Sertoli cells and germinative cells, by activating specific purinergic receptors. In this work, we report that both FSH and retinol are able to induce changes in the levels of extracellular purines of cultured rat Sertoli cells. FSH induced an increase in adenosine, mainly caused by enhanced ecto-ATPase activity, while retinol increased xanthine and hypoxanthine levels, and decreased uric acid concentration by an unknown mechanism. These data indicate that purinergic signaling may be involved in the control and/or regulation of some of the reproductive-related actions of these hormones.
Gelain
Daniel Pens
DP
Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil. dgelain@yahoo.com.br
Casali
Emerson André
EA
de Oliveira
Ramatis Birnfeld
RB
de Souza
Luiz Fernando
LF
Barreto
Fabiano
F
Dal-Pizzol
Felipe
F
Moreira
José Cláudio Fonseca
JC
D000818:Animals; D005640:Follicle Stimulating Hormone / Q000378:metabolism / Q000494:pharmacology*; D007700:Kinetics; D008297:Male; D011687:Purines / Q000378:metabolism*; D051381:Rats; D012708:Sertoli Cells / Q000187:drug effects* / Q000378:metabolism; D013997:Time Factors; D014801:Vitamin A / Q000378:metabolism / Q000494:pharmacology*
D011687:Purines; D014801:Vitamin A; D005640:Follicle Stimulating Hormone