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  • Title: Effect of indomethacin and prostaglandin E2 on structural differentiation of rat endometrium during artificially induced decidualization.
    Author: Keys JL, Kennedy TG.
    Journal: Am J Anat; 1990 Jun; 188(2):148-62. PubMed ID: 2375280.
    Abstract:
    Morphological differentiation of uterine stromal and luminal epithelial cells was studied in steroid-injected ovariectomized rats following unilateral intrauterine instillation of sesame oil, phosphate-buffered saline containing gelatin (PBSG), PBSG + indomethacin (IM; an inhibitor of prostaglandin synthesis), or PBSG + IM + prostaglandin E2 (PGE2). The latter two treatments were preceded by a subcutaneous injection of IM. Uteri were examined by light and electron microscopy at intervals between 8 and 120 hr (n = 4/treatment/time). Differentiation began in the periluminal antimesometrial region and progressed peripherally and towards the mesometrial aspect in all groups. Structural features and timing of differentiation were similar for oil-injected and PBSG-infused uteri. Administration of IM inhibited the onset of the decidual cell reaction and had deleterious effects on the luminal epithelium. Inclusion of PGE2 in the instillate accelerated stromal cell differentiation and overcame the inhibitory effect of IM. The results implicate prostaglandins, particularly PGE2, in endometrial transformation during decidualization.
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