Effect of angiotensin II on human luteinized granulosa cells

W. E. Rainey, I. M. Bird, W. Byrd, B. R. Carr

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Objective: To determine if human luteinized granulosa cells (GCs) exhibit angiotensin II (AII) receptors and if AII affects GC steroidogenesis. Design: Luteinized GCs were either treated immediately or maintained in culture for up to 6 days before use. The presence of functional AII receptors was evaluated using the following criteria: [1] receptor binding of 125I- labeled AII; [2] changes in inositol phosphate production; [3] effects on progesterone (P) production; and [4] effects on cyclic adenosine 3':5' monophosphate (cAMP) production. Results: No specific binding of 125I- labeled AII was observed using human luteinized GCs in culture. Angiotensin II did not alter the formation of [3H] inositol phosphates, nor did it alter the release of P from freshly isolated cells or cells that had been in culture for 5 days. Angiotensin II was also unable to alter basal or gonadotropin-stimulated cAMP production. These data suggest that human luteinized GCs exhibit little or no type 1 or type 2 AII receptors. Conclusion: This observation is in contrast to reports in rat granulosa that exhibit AII receptors. The reason for a lack of AII receptor expression on human luteinized GCs is unknown but could be because of luteal phase down regulation with gonadotropin-releasing hormone agonist or the subsequent stimulation with gonadotropins in these women before follicular stimulation.

Original languageEnglish (US)
Pages (from-to)143-147
Number of pages5
JournalFertility and sterility
Volume59
Issue number1
DOIs
StatePublished - 1993

Keywords

  • Human luteinized granulosa
  • angiotensin II
  • cell culture

ASJC Scopus subject areas

  • Reproductive Medicine
  • Obstetrics and Gynecology

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