Effects of Dihydrotestosterone on Rat Dermal Papilla Cells In Vitro

April 2015 in “ European Journal of Pharmacology ”

Jingoo Kang, Sang-Cheol Kim, Minkyoung Kim, Hye-Jin Boo, Young Ho Kim, Guang-Jin Im, Young Ho Kim, Jin-Won Hyun, Jihoon Kang, Young-Sang Koh, Deok-Bae Park, Eun-Sook Yoo, Hee-Kyoung Kang

dihydrotestosterone DHT dermal papilla cells DPCs cell-cycle arrest p27kip1 cyclin E cyclin D1 cyclin-dependent kinase 2 Smad2/3 heat shock protein 27 HSP27 ß-catenin mammalian target of rapamycin mTOR TGF-B/Smad

Studysummary This study found that dihydrotestosterone (DHT) may shorten the hair growth cycle through mechanisms like cell-cycle arrest and β-catenin downregulation in rat hair follicle cells. Our plain-language summary of this paper — not a Tressless recommendation.

In 2015, a study investigated the effects of dihydrotestosterone (DHT) on rat dermal papilla cells (DPCs), which are crucial for hair growth regulation. The study found that DHT did not impact DPC proliferation but induced cell-cycle arrest, increased p27kip1 levels, and decreased cyclin E, cyclin D1, and cyclin-dependent kinase 2 levels. DHT treatment led to the phosphorylation and nuclear translocation of Smad2/3 and heat shock protein 27 (HSP27), decreased total and nuclear ß-catenin levels, but increased the phosphorylation of mammalian target of rapamycin (mTOR). These findings suggest that DHT could shorten the hair growth cycle by initiating cell-cycle arrest, downregulating ß-catenin, and upregulating TGF-B/Smad and HSP27, while mTOR activation by DHT could counteract hair growth cycle inhibition in DPCs.

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