title: Oncostatin M inhibits decidualization of normal human endometrial stromal cells.
abstract: It is well known that oncostatin M binds and activates leukemia inhibitory factor-specific receptors while leukemia inhibitory factor cannot bind oncostatin M-specific receptors. In this study, the differential effects of oncostatin M and leukemia inhibitory factor on cell survival and decidualization of normal human endometrial stromal cells were investigated by using 8-Br-cAMP-induced decidualization assay. Oncostatin M did not affect the viable cell numbers or the prolactin release of unstimulated stromal cells. However, oncostatin M dose-dependently suppressed prolactin releases from 8-Br-cAMP-stimulating stromal cells but enhanced their viable cell numbers. Although oncostatin M significantly enhanced viable cell numbers of 8-Br-cAMP-stimulated stromal cells, it did not affect prolactin secretion from 8-Br-cAMP-induced decidualized cells. Leukemia inhibitory factor significantly enhanced viable cell numbers of 8-Br-cAMP-stimulating cells in a dose-dependent manner as did oncostatin M, while leukemia inhibitory factor did not show any significant suppression of PRL secretion from 8-Br-cAMP-stimulating cells. These results indicate that oncostatin M inhibits the 8-Br-cAMP-induced decidualization process via oncostatin M-specific receptors and that oncostatin M and leukemia inhibitory factor enhance cell survival of 8-Br-cAMP-stimulated prolactin-non-secreting stromal cells mainly via leukemia inhibitory factor receptors. Thus, oncostatin M may autoregulate human endometrial stromal cell survival and decidualization in a paracrine manner.
authors.affiliation: Department of Obstetrics and Gynecology, Wakayama Medical University, Japan. tetanaka@wakayama-med.ac.jp
authors.forename: Tetsuji
authors.initials: T
authors.lastname: Tanaka
authors.forename: Naohiko
authors.initials: N
authors.lastname: Umesaki
mesh_terms: D015124:8-Bromo Cyclic Adenosine Monophosphate / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects* / Q000502:physiology; D002470:Cell Survival; D002478:Cells, Cultured; D004717:Endometrium / Q000166:cytology* / Q000187:drug effects* / Q000502:physiology; D005260:Female; D006131:Growth Inhibitors / Q000494:pharmacology*; D006801:Humans; D015850:Interleukin-6 / Q000378:metabolism; D053605:Leukemia Inhibitory Factor; D053683:Oncostatin M; D010455:Peptides / Q000494:pharmacology*; D017154:Stromal Cells / Q000166:cytology / Q000378:metabolism*
chemical_list: D006131:Growth Inhibitors; D015850:Interleukin-6; C507837:LIF protein, human; D053605:Leukemia Inhibitory Factor; C508351:OSM protein, human; D010455:Peptides; D053683:Oncostatin M; D015124:8-Bromo Cyclic Adenosine Monophosphate