Molecular Human Reproduction, Vol. 7, No. 7, 665-670,
July 2001
© 2001 European Society of Human Reproduction and Embryology
Uterine physiology |
Menstrual cycle-specific inhibition of endometrial stromal cell proliferation by oncostatin M
Department of Obstetrics and Gynecology, Tottori University School of Medicine, Yonago 683-8504, Japan
Abstract
We have investigated the possible roles of oncostatin M (OSM), which is a member of the interleukin-6 family of cytokines, in endometrial and endometriotic stromal cell growth. Endometrial and endometriotic stromal cells were collected from the uterus or ovarian chocolate cysts. We observed the expression of mRNA transcripts for OSM, OSM receptor subunit ß, leukaemia inhibitory factor receptor subunit (LIFR), and glycoprotein 130 in endometrial and endometriotic stromal cells. We also examined the effects of OSM (0–50 ng/ml) and LIF (0–10 ng/ml) on endometrial and endometriotic stromal cell proliferation and evaluated the effects of OSM on endometrial stromal cell differentiation. The presence of 10–50 ng/ml OSM significantly suppressed endometrial stromal cell growth in secretory phase tissue but not in proliferative phase tissue. In contrast, stromal cells in endometriotic tissues were resistant to the inhibitory effects of OSM. Addition of LIF did not influence the growth of endometrial stromal cells. We also showed that 10 ng/ml OSM stimulated markers of differentiation causing increased prolactin secretion and cyclooxygenase-2 gene expression in endometrial stromal cells from the secretory phase. These results suggest that OSM may play a pivotal role in regulating the growth and differentiation of endometrial cells. Endometriotic cells may behave differently from normal endometrial cells in terms of the inhibitory response to OSM.
cell proliferation/differentiation/endometriosis/endometrium/oncostatin M
Notes
1 To whom correspondence should be addressed. E-mail gano{at}grape.med.tottori-u.ac.jp
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