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The present study was designed to investigate whether or not prostaglandins(PGs) were produced by human luteal cells(HLC) and their effects on the luteal cells by monolayer culture. The following results were obtained. Cultured HLC secreted progesterone(P), prostaglandin F(PGF) and prostaglandin E(PGE) into a medium at concentrations of 276.6 +/- 38.6, 1.95 +/- 0.36, 2.44 +/- 0.45 ng/ml/1 X 10(5) cells/day (mean +/- SE), respectively. Cultured HLC was able to convert 14C-arachidonic acid to 14C-PGF2 alpha, 14C-PGE2. These two results indicated that HLC had the ability to produce PGF and PGE. Cultures were carried out in the presence of indomethacin (Ind), PGF2 alpha and PGE2 alone as well as in a combination. P production by HLC was reduced in the presence of Ind. P production in the presence of Ind+PGE2 was more than that in the presence of Ind alone. There was no significant difference in P production between the presence of Ind and Ind+PGF2 alpha. It was concluded that HLC had the ability to produce PGs and that PGE2 significantly stimulated P production in as low concentrations as HLC could produce physiologically while PGF2 alpha did not.

Effect of Prostaglandins (PGs) on Progestrone Production by Human Cultured Luteal Cells and their Ability of PGs Production