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. 1975 Sep;150(3):413–418. doi: 10.1042/bj1500413

Effect of protein-synthesis inhibitors on testosterone production in rat testis interstitial tissue and Leydig-cell preparations.

B A Cooke, F H Janszen, W F Clotscher, H J van der Molen
PMCID: PMC1165756  PMID: 174545

Abstract

Luteinizing-hormone-stimulated testosterone biosynthesis was inhibited by cycloheximide during incubation of rat testis intersitial tissue in vitro and also by puromycin and cycloheximide during incubation of Leydig-cell preparations, but not by chloramphenicol. These results suggest that a protein regualtor(s) formed by cytoplasmic protein synthesis is involved in steroidogenesis in the rat testis. The specific effect of cycloheximide and puromycin on protein synthesis rather than on other non-specific processes is suggested by the inhibition of protein synthesis and steroidogenesis with different doses of the inhibitors and the lack of effect of cycloheximide on luteinizing-hormone-induced adenosine 3':5'-cyclic monophosphate production. Stimulation of testosterone production by luteinizing hormone during superfusion of interstitial tissue was detectable within 10-20 min and reached a maximum of 120 min, and thereafter slowly decreased. Cycloheximide added at maximum steroid production caused a rapid decrease in testosterone synthesis which followed first-order kinetics (half-life 13 min), thus indicating that the protein regulator(s) has a short half-life. No effect of cycloheximide, puromycin or chloramphenicol on testosterone production in the absence of added luteinizing hormone was found, suggesting that the basal production of testosterone is independent of protein synthesis.

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Selected References

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