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Androgens accelerate thymocyte apoptosis

N J Olsen1, S M Viselli, J Fan

  • 1Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA. nancy.j.olsen2@vanderbilt.edu

Endocrinology
|February 4, 1998
PubMed
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Androgens rapidly decrease thymus size by inducing thymocyte apoptosis, requiring a functional androgen receptor. This mechanism may shape gender-specific immune system characteristics.

Area of Science:

  • Immunology
  • Endocrinology

Background:

  • The mechanisms of androgen-induced thymic involution are not well understood.
  • Androgens are known to influence thymus size and function.

Purpose of the Study:

  • To investigate the role of androgens in thymic involution.
  • To determine if androgens induce apoptosis in thymocytes.

Main Methods:

  • Administration of testosterone to castrated male mice.
  • Thymic organ cultures treated with dihydrotestosterone.
  • Comparison of androgen-resistant (Tfm/Y) mice with intact mice.

Main Results:

  • Testosterone administration caused rapid decreases in thymus size.
  • Dihydrotestosterone treatment enhanced thymocyte apoptosis in vitro.

Related Experiment Videos

  • Androgen-resistant mice did not exhibit increased apoptosis with androgen treatment, but responded to glucocorticoids.

    • Conclusions:

    • Androgens accelerate thymocyte apoptosis, likely mediated by the androgen receptor.
    • This process may play a role in thymocyte selection.
    • Androgen-induced apoptosis could contribute to gender-specific T cell repertoire development.