Androgens accelerate thymocyte apoptosis

Endocrinology. 1998 Feb;139(2):748-52. doi: 10.1210/endo.139.2.5729.


Mechanisms of androgen-induced thymic involution are largely undefined. We have found that significant decreases in thymic size occur 2-4 h after a dose of testosterone is administered to castrated male mice. This rapid rate of change suggests a role for androgen-induced apoptosis in modulating the size and composition of the thymus. Using thymic organ cultures to define these effects of androgens, we found that dihydrotestosterone treatment of thymus tissues from females or from castrated males results in enhancement of thymocyte apoptosis. Intact (androgen-replete) or testicular feminization, Tfm/Y (androgen-resistant) mice failed to show apoptotic change with androgen treatment, although the apoptotic response to glucocorticoids was present, suggesting a requirement for a functional androgen receptor. Acceleration of thymocyte apoptosis by androgens may mediate processes of thymocyte selection, with the potential to impart gender-specific characteristics on the peripheral T cell repertoire.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Apoptosis / physiology*
  • DNA Fragmentation / drug effects
  • Dexamethasone / pharmacology
  • Dihydrotestosterone / pharmacology*
  • Female
  • Glucocorticoids / pharmacology
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Organ Culture Techniques
  • Thymus Gland / cytology
  • Thymus Gland / drug effects*
  • Thymus Gland / physiology*


  • Glucocorticoids
  • Dihydrotestosterone
  • Dexamethasone