although the amount of 3h-labeled c-19 steroids formed from [ 3h ] -progesterone by sertoli cells is relatively small ( 1.8 % conversion ) compared to t formation by whole testicular tissue or by isolated interstitial cells , the ability of sertoli cells to form t and dht from progesterone may be physiologically important in the local regulation of sertoli cell function and spermatogenesis .
C1515300
testicular tissue
C0023602
interstitial cells