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• W1978931844 abstract "Androgens regulate hair growth, and 5alpha-reductase (5alphaR) plays a pivotal role in the action of androgens on target organs. To clarify the molecular mechanisms responsible for controlling hair growth, the present study presents evidence that the human follicular dermal papilla cells (DPCs) from either beard (bDPCs) or scalp hair (sDPCs) possess endogenous 5alphaR activity. Real-time RT-PCR revealed that the highest level of 5alphaR1 mRNA was found in bDPCs, followed by sDPCs, and a low but detectable level of 5alphaR1 mRNA was observed in fibroblasts. Minimally detectable levels of 5alphaR2 mRNA were found in all three cell types. A weak band at 26kDa corresponding to the human 5alphaR1 protein was detected by Western blot in both DPCs, but not in fibroblasts. Immuonofluorescence analysis confirmed that 5alphaR1 was localized to the cytoplasm rather than in the nuclei in both DPCs Furthermore, a 5alphaR assay using [(14)C]testosterone labeling in intact cells revealed that testosterone was transformed primarily into androstenedione, and in small amounts, into DHT. Our results demonstrate that the 5alphaR activities of either bDPCs or sDPCs are stronger than that of dermal fibroblasts, despite the fact that the major steroidogenic activity is attributed to 17beta-HSD rather than 5alphaR among the three cell types. The 5alphaR1 inhibitor MK386 exhibited a more potent inhibitory effect on 5alphaR activity than finasteride (5alphaR2 inhibitor) in bDPCs." @default.
• W1978931844 created "2016-06-24" @default.
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• W1978931844 date "2008-04-01" @default.
• W1978931844 modified "2023-10-17" @default.
• W1978931844 title "Different patterns of 5α-reductase expression, cellular distribution, and testosterone metabolism in human follicular dermal papilla cells" @default.
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• W1978931844 doi "https://doi.org/10.1016/j.bbrc.2008.01.130" @default.
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