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Glucocorticoid suppresses steroidogenesis in rat progenitor leydig cells.

Authors: Xiao, YC  Huang, YD  Hardy, DO  Li, XK  Ge, RS 
Citation: Xiao YC, etal., J Androl. 2010 Jul-Aug;31(4):365-71. Epub 2010 Jan 14.
Pubmed: (View Article at PubMed) PMID:20075416
DOI: Full-text: DOI:10.2164/jandrol.109.009019

Glucocorticoid (GC) inhibits testosterone production in adult Leydig cells by the glucocorticoid receptor (GR). However, whether GC affects the development of Leydig cells is unclear. The goal of the present study is to investigate the effects of GC on steroidogenesis of rat progenitor Leydig cells (PLCs) in vitro. Dexamethasone (DEX) inhibited androsterone (AO) production in PLCs. The GR antagonist RU38486 reversed the DEX-induced inhibition of AO, whereas the mineralocorticoid receptor antagonist RU28318 did not. RU38486 also reversed DEX-induced reductions in steady-state mRNA levels of steroidogenic acute regulatory protein (Star) and 3beta-hydroxysteroid dehydrogenase 1 (Hsd3b1). Steroidogenic acute regulatory protein (StAR) protein expression and 3beta-hydroxysteroid dehydrogenase (3betaHSD) enzyme activity were affected similarly. These results show that GCs inhibit steroidogenesis of PLCs by suppression of StAR and 3betaHSD via a GR-mediated mechanism.


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RGD Object Information
RGD ID: 4145599
Created: 2010-11-10
Species: All species
Last Modified: 2010-11-10
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.