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Biology of Reproduction, Vol 30, 1027-1038, Copyright © 1984 by Society for the Study of Reproduction

ARTICLES

Uterotropic action of indomethacin on the rat uterus

CP Puri, LW Mac Kenzie, RE Garfield and WG Wiest

Administration of indomethacin (10 mg/kg body weight, twice daily for 6 days) resulted in a significant (P less than 0.01) increase in the weight, and cross-sectional area of uteri of ovariectomized rats, whereas no such effects were observed following indomethacin administration to normal cycling rats. Prostaglandin F2 alpha (PGF2 alpha) content (ng/uterus) and concentration (ng/g wet weight) in the uterus of indomethacin-treated animals were reduced 40.4% and 60.8%. Simultaneous administration of either estradiol-17 beta (E2), progesterone testosterone with indomethacin to ovariectomized rats failed to reduce the uterine weight increase. On the contrary, concomitant administration of E2 (25 or 100 ng/day) and indomethacin resulted in uterine weight increases which were greater than those associated with indomethacin alone. Uterine E2 content was significantly higher in animals treated with indomethacin plus E2 as compared to those given estradiol alone. Uterine uptake of 2,4,6,7- [3H]E2 following i.v. administration was greater in animals pretreated with indomethacin (5 mg/kg, twice daily) for 3 days than in ovariectomized controls. These results suggest that prostaglandins may be involved in the regulation of uterine growth.




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Copyright © 1984 by the Society for the Study of Reproduction.