Progesterone-induced immunosuppression is not mediated through the progesterone receptor.

Journal Article (Journal Article)

Progesterone is a known immunosupressant in humans and may be important in treatment regimens for women with immunological and endocrinological reproductive failure. The molecular mechanism of progesterone-mediated immunosuppression remains controversial. We used the reverse transcriptase polymerase chain reaction (RT-PCR) technique to detect progesterone receptor RNA in human peripheral blood mononuclear cells (PBMCs). No expression could be documented in PBMCs from men or women representing various reproductive states. We also used the glucocorticoid receptor antagonist RU 43044 to address the hypothesis that progesterone exerts immunomodulatory effects via interactions with the glucocorticoid receptor. Both hydrocortisone (10(-6) and 10(-7) M) and progesterone (10(-5), 10(-6) and 10(-7) M) inhibited phytohaemagglutinin-induced lymphocyte proliferation in a dose-dependent fashion. RU 43044 (10(-5) M) significantly reversed the immunosuppressive effect od hydrocortisone but not that of progesterone. These studies indicate that human PBMCs do not express the classical progesterone receptor. Our results further suggest that progesterone does not mediate its immunomodulatory effects via interaction with the glucocorticoid receptor. Interaction with other members of the steroid and thyroid hormone receptor superfamily, local conversion to other steroid substances or non-classical receptor-mediated mechanisms may be involved.

Full Text

Duke Authors

Cited Authors

  • Schust, DJ; Anderson, DJ; Hill, JA

Published Date

  • May 1996

Published In

Volume / Issue

  • 11 / 5

Start / End Page

  • 980 - 985

PubMed ID

  • 8671374

International Standard Serial Number (ISSN)

  • 0268-1161

Digital Object Identifier (DOI)

  • 10.1093/oxfordjournals.humrep.a019335


  • eng

Conference Location

  • England