The phosphodiesterase 3 inhibitor ORG 9935 inhibits oocyte maturation in the naturally selected dominant follicle in rhesus macaques

Jeffrey T. Jensen, Mary B. Zelinski, Jessica E. Stanley, John W. Fanton, Richard L. Stouffer

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Background: The study was conducted to determine whether the phosphodiesterase (PDE) 3 inhibitor ORG 9935 prevents the resumption of meiosis in primate oocytes during natural menstrual cycles. Study Design: Regularly cycling adult female macaques (n=8) were followed during the follicular phase and then started on a 2-day treatment regimen of human recombinant gonadotropins to control the timing of ovulation. Monkeys received no further treatment (controls) or ORG 9935. Oocytes were recovered by laparoscopic follicle aspiration 27 h after an ovulatory stimulus, cultured in vitro in the absence of inhibitor and inseminated. The primary outcome was the meiotic stage of the oocyte. Results: In six ORG 9935 cycles, five of the recovered oocytes were germinal vesicle (GV)-intact, and one exhibited GV breakdown (GVBD). In contrast, all three oocytes that recovered during control cycles were GVBD (p<.05). None of the ORG 9935-treated oocytes underwent fertilization compared with 2/3 (67%) from controls. Conclusions: These results demonstrate that ORG 9935 blocks resumption of meiosis in the naturally selected dominant follicle in primates and suggest that PDE3 inhibitors have potential clinical use as contraceptives in women.

Original languageEnglish (US)
Pages (from-to)303-307
Number of pages5
JournalContraception
Volume77
Issue number4
DOIs
StatePublished - Apr 1 2008

Keywords

  • Contraception
  • Macaque
  • Meiosis
  • Oocyte
  • Phosphodiesterase inhibitor

ASJC Scopus subject areas

  • Reproductive Medicine
  • Obstetrics and Gynecology

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