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Upregulation of Fas and FasL expression in testosterone-induced apoptosis of macrophages

H Zhang1, Z Zhu, L Liu

  • 1Division of Parasitology, School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, PR China.

Methods and Findings in Experimental and Clinical Pharmacology
|January 22, 2004
PubMed

Insights

Testosterone can induce macrophage apoptosis at high concentrations, involving the Fas/Fas ligand system. This study investigates testosterone

Area of Science:

  • Immunology
  • Endocrinology

Background:

  • Limited research exists on testosterone's impact on macrophage apoptosis.
  • Macrophages play crucial roles in immune responses and tissue homeostasis.

Purpose of the Study:

  • To investigate the effect of testosterone on macrophage apoptosis.
  • To elucidate the role of the Fas/Fas ligand (FasL) system in testosterone-induced apoptosis.

Main Methods:

  • Bone marrow-derived macrophages (BMMs) were treated with varying concentrations of testosterone in vitro.
  • Apoptosis was assessed, and the expression of Fas, FasL, and caspase-8 was analyzed.

Main Results:

  • Testosterone at physiological concentration (10 nM) did not induce BMM apoptosis.
  • Higher testosterone concentrations (100-400 nM) induced significant BMM apoptosis.
  • Testosterone-induced apoptosis correlated with increased expression of Fas, FasL, and caspase-8.

Conclusions:

  • High concentrations of testosterone can induce macrophage apoptosis.
  • The Fas/FasL system appears to be a key mediator in testosterone-induced macrophage apoptosis.

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