Regulation of prostaglandin F(2α) and E receptor mRNA by prostaglandin F(2α) in ovine corpora lutea

S. J. Tsai, L. E. Anderson, J. Juengel, G. D. Niswender, M. C. Wiltbank

研究成果: Article同行評審

26 引文 斯高帕斯(Scopus)

摘要

Prostaglandins regulate many physiological functions, including reproduction, by binding to specific plasma membrane receptors. In this study we evaluated the regulation of PGF(2α) (FP) and PGE (EP3 subtype) receptors in ovine corpora lutea. In the first study, tissue distribution of FP and EP3 receptors was evaluated in 13 ovine tissues. FP receptor mRNA was present in 100-fold higher concentration in corpora lutea than in other tissues. Similarly, [3H]PGF(2α) binding was much greater in luteal plasma membranes than in membranes from other tissues. In contrast, EP3 receptor mRNA was more uniformly distributed, with high concentrations in adrenal medulla, inner myometrium, kidney medulla and heart. The distribution of [3H]PGE1 binding was generally similar to EP3 mRNA, with the exception that ovarian stroma, endometrium and outer myometrium had high [3H]PGE1 binding but low concentrations of EP3 receptor mRNA. The second study evaluated the action of PGF(2α) on luteal mRNA encoding FP and EP3 receptors. Ewes had PGF(2α) or saline infused into the ovarian artery and corpora lutea were removed at 0, 1, 4, 12 and 24 h. FP receptor mRNA decreased by 50% at 12 and 24 h after infusion with PGF(2α), whereas EP3 mRNA was unchanged. Treatment of large luteal cells with PGF(2α), phorbol didecanoate (protein kinase C activator), or ionomycin (calcium ionophore) decreased FP receptor mRNA after 24 h (P < 0.05). Glyceraldehyde 3-phosphate dehydrogenase mRNA was not changed by any treatment. These results show that EP3 receptors are expressed in many tissues and expression is not regulated by PGF(2α). In contrast, FP receptors are primarily expressed in corpora lutea and expression is inhibited by PGF(2α).

原文English
頁(從 - 到)69-75
頁數7
期刊Journal of Reproduction and Fertility
114
發行號1
出版狀態Published - 1998

All Science Journal Classification (ASJC) codes

  • 生理學
  • 胚胎學
  • 分子生物學
  • 婦產科
  • 發展生物學

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