| Abstract: | Prostaglandin (PGE, 6-keto PGF1 alpha) output by cells dispersed from human amnion and decidua in the presence of increasing levels (0-5000 ng/ml) of estradiol-17 beta (E2) or 2-hydroxyestradiol-17 beta (2-OH E2) was studied in relation to parturition. Tissues were obtained from women at term either before (CS) or after (SL) spontaneous labor and vaginal delivery. In the absence of estrogens, the output of both PGs from amnion increased significantly with labor. No significant increase in decidua PG output occurred with labor. Neither estrogen influenced CS amnion PG output. However, both E2 and 2-OH E2 stimulated SL amnion PGE output (2-OH E2 greater than E2) while having no affect on 6-keto PGF1 alpha output. Only the highest dose of 2-OH E2 stimulated PGE output in CS decidua, but both estrogens significantly inhibited 6-keto PGF1 alpha output in this tissue. In SL decidua only 2-OH E2 significantly stimulated PGE, and neither estrogen affected 6-keto PGF1 alpha output. These results might suggest that estrogens modulate PG biosynthesis at the level of endoperoxide to primary PG conversion. |
