摘要:
Efficient syntheses of new DHEA analogues, and their apoptotic and necrotic effects on Leydig cells and TM4 Sertoli cells are described. The key step in the synthetic strategy of 7-amino-DHEA derivatives involves a bromination on C-7 position to give an epimeric mixture of bromides which were substituted by azides and reduced to give 7 alpha- and 7 beta-amino-3 beta-hydroxyandrost-5-en-17-ones. No cytotoxic effect induced by apoptosis mechanism was observed on Leydig and TM4 Sertoli cells by treatment with these amino-DHEA analogues. A necrotic effect was induced only in TM4 Sertoli cells. The best activity was obtained with 70 alpha,beta-aminoandrost-5-en-3 beta-ol and 7 beta-amino-3 beta-hydroxy-androst-5-en-17-one. (c) 2007 Elsevier Ltd. All rights reserved.