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hCG-Induced Loss of LH-hCG Receptor and Desensitization of Adenylate Cyclase

  • C. Y. Lee
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 112)

Abstract

Experimental evidence has been accumulated to support the concept that gonadotropins are involved in the regulation of their own receptors (1–2). Exposure of ovarian follicles to hCG (LH) in vivo or in vitro results in a decline in the capacity of follicles to produce cyclic AMP in response to further hCG (LH) stimulation (3,4). Direct measurement of LH-stimulated adenylate cyclase activity in ovarian follicles and corpora lutea demonstrated that desensitization is due to decreased response of adenylate cyclase to subsequent gonadotropin stimulation (5). Furthermore, studies have shown that the desensitization of hCG-sensitive adenylate cyclase is closely related to the loss of hCG receptors (6,7). The present-report demonstrates that hCG-induced loss of hCG (LH) receptors and desensitization of adenylate cyclase were both time and concentration-dependent and displayed a close correlation.

Keywords

Adenylate Cyclase Corpus Luteum Ovarian Follicle Adenylate Cyclase System Receptor Loss 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • C. Y. Lee
    • 1
  1. 1.Department of Laboratory Medicine and PathologyUniversity of MinnesotaMinneapolisUSA

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