6 citations
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October 1993 in “Endocrinology” In this study, researchers found that finasteride inhibits progesterone synthesis by blocking cholesterol side-chain cleavage in mouse-derived MA-10 Leydig cells, but this effect may not be evident in human or rat cells.
January 2004 in “Data Archiving and Networked Services (DANS)” This study found that finasteride blocked the progesterone-induced increase in spike-wave discharges in rats, suggesting that this effect of progesterone is mediated by its metabolite allopregnanolone.
21 citations
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January 2015 in “The Journal of Steroid Biochemistry and Molecular Biology” In this study, researchers demonstrated that in a mouse model, the stimulation of mammary tumor growth due to progesterone is primarily caused by its metabolite, 5αP, not progesterone itself.
48 citations
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February 1999 in “PubMed” This study found that the anticonvulsant effects of progesterone against PTZ-induced seizures in mice require conversion to allopregnanolone, as shown by the reversal of these effects with a 5alpha-reductase inhibitor.
January 2020 in “Nihon Yakuri Gakkai nenkai yoshishu” This study suggests that 5α-reductase-mediated metabolism of progesterone contributes to the differentiation of endometrial stromal cells, potentially influencing progesterone levels and promoting cell differentiation.