Regulation of prostaglandin synthesis by progesterone in the bovine corpus luteum

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Abstract

The objective of the present study was to investigate the influence of progesterone on prostaglandin synthesis by the corpus luteum (CL). Corpora lutea were obtained from dairy cows on days 4,6,10, and 18 of the estrous cycle, dissociated. and placed in serum-free culture. The addition of luteinizing hormone (LH) resulted in a slight, but nonsignificant (p > 0.05), increase in levels of 6-keto-PGF, and had no effect on PGF. Progesterone treatment caused a significant, dose-dependent decrease in both PGF and 6-keto-PGF in 6-day and 10-day corpora lutea, but not in 4-day or 18-day corpora lutea. In the 6- and 10-day corpora lutea, progesterone treatment resulted in a greater inhibition of PGF than 6-keto-PGF production. Therefore, progesterone treatment brought about an increase in the 6-keto-PGF to PGF ratio in these cells (12.9 vs. 21.3). It is concluded from these studies that progesterone can modulate luteal prostacyclin and PGF synthesis, suggesting an interaction of progesterone and prostaglandin production within the corpus luteum.

Original languageEnglish (US)
Pages (from-to)303-315
Number of pages13
JournalProstaglandins
Volume36
Issue number3
DOIs
StatePublished - Jan 1 1988

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Endocrinology

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