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  • Title: Inhibition of cAMP-mediated decidualization in human endometrial stromal cells by IL-1beta and laminin.
    Author: Mizuno K, Tanaka T, Umesaki N, Ogita S.
    Journal: Horm Metab Res; 1999 May; 31(5):307-10. PubMed ID: 10422725.
    Abstract:
    Both IL-1 and laminin are reported to inhibit progesterone receptor-mediated decidualization signals in endometrial stromal cells, but the effects of these two inhibitors on cAMP-mediated decidualization signals remain unknown. Furthermore, the interaction between IL-1-stimulated and laminin-stimulated signals has not been analyzed yet. In this study, interactions between these two decidualization-inhibitory signals and their effects on 8-Br-cAMP-mediated decidualization in human endometrial stromal cells were investigated. Prolactin release from decidualized stromal cells was measured by enzyme immunoassay in order to quantitate in vitro decidualization. Both IL-1beta and laminin were found to inhibit 8-Br-cAMP-induced decidualization in vitro in human endometrial stromal cells. IL-1beta dose-dependently inhibited decidualization of stromal cells cultured on both laminin-coated and collagen-coated dishes, while laminin inhibited the decidualization of stromal cells cultured both with and without IL-1beta. These results indicate that IL-1beta and laminin additively and mutually inhibit cAMP-mediated decidualization signals, and that they may inhibit these signals through different mechanisms.
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