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Journal of Assisted Reproduction and Genetics

, Volume 19, Issue 8, pp 384–389 | Cite as

Effect of In Vivo GnRH Agonist and GnRH Antagonist on hCG and Insulin-Stimulated Progesterone Production by Human Granulosa-Lutein Cells In Vitro

  • Mohamed F. M. Mitwally
  • Robert F. CasperEmail author
Article

Abstract

Purpose: To investigate hCG and insulin-stimulated progesterone (P) production by human granulosa-lutein cells (hGLC) in vitro.

Methods: hGLCs were isolated from patients undergoing IVF-ET cycles in which GnRH agonist or GnRH antagonist was used to prevent a midcycle gonadotropin surge. The cells were cultured for 3 days, and then treated with hCG 0.5, 1, and 10 IU/I, and insulin 0.01, 0.1, and 1 μM in serum free conditions. In vitro P production was measured by enzyme immunoassay.

Results: hCG stimulated P production by hGLCs from cycles in which GnRH antagonist was used, but a blunted response was seen in GnRH-agonist treated cycles. Insulin-stimulated P production was similar in cells from cycles in which GnRH-agonist or GnRH-antagonist treatment was used.

Conclusions: Because insulin and hCG may share common pathways beyond the level of receptor activation, we hypothesize that GnRH agonist, but not GnRH antagonist, may affect the expression and/or activation of LH receptors in the hGLCs.

GnRH agonist GnRH antagonist granulosa cells progesterone 

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Copyright information

© Plenum Publishing Corporation 2002

Authors and Affiliations

  1. 1.Division of Reproductive Sciences, Department of Obstetrics and GynecologySamuel Lunenfeld Research Institute and Mount Sinai Hospital, University of TorontoTorontoCanada
  2. 2.Department of Gynecology and ObstetricsState University of New York (SUNY) at BuffaloBuffalo

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