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Dihydrotestosterone modulates endothelial progenitor cell function via RhoA/ROCK pathway.

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Dihydrotestosterone (DHT) enhances endothelial progenitor cell (EPC) function, promoting proliferation, migration, and adhesion. This effect is mediated through the RhoA/ROCK pathway, highlighting DHT

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Area of Science:

  • Cardiovascular Science
  • Endocrinology
  • Cell Biology

Background:

  • Testosterone levels are inversely linked to cardiovascular disease risk in men.
  • Endothelial progenitor cells (EPCs) are crucial for vascular health and repair.
  • Dihydrotestosterone (DHT), a testosterone metabolite, may influence EPC function.

Purpose of the Study:

  • To investigate the impact of DHT on human EPC function.
  • To elucidate the molecular mechanisms underlying DHT's effects on EPCs.

Main Methods:

  • Human EPCs were treated with varying concentrations and durations of DHT.
  • EPC proliferation, migration, and adhesion were assessed using standard assays.
  • Vascular endothelial growth factor (VEGF) and RhoA activity were quantified.

Main Results:

  • DHT dose-dependently and time-dependently increased EPC proliferation, migration, and adhesion.
  • DHT upregulated VEGF production and activated the RhoA signaling pathway.
  • Inhibitors of RhoA/ROCK blocked DHT's beneficial effects on EPCs and VEGF production.

Conclusions:

  • DHT promotes EPC proliferation, migration, and adhesion.
  • The RhoA/ROCK pathway is essential for mediating DHT's pro-EPC effects.