Cyclooxygenase-2 Regulates Survival, Migration, and Invasion of Human Endometriotic Cells through Multiple Mechanisms

S K Banu, Sakhila K. Banu, J Lee, JeHoon Lee, V O Speights, A Starzinski-Powitz, Anna Starzinski‐Powitz, Joe A. Arosh, J A Arosh
Endocrinology · 2007 · vol. 149(3) , pp. 1180–1189 · doi:10.1210/en.2007-1168 · PMID:18039779 · W2095115481
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This study found that cyclooxygenase-2 (COX-2) is highly expressed in human endometriotic tissues and promotes endometriotic cell survival, migration, and invasion by increasing prostaglandin E2 production.

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Abstract

Endometriosis is a debilitating disease characterized by the presence of functional endometrial glandular epithelium and stroma outside the uterine cavity that affects up to 20% of women of child-bearing age. Cyclooxygenase-2 (COX-2), a rate-limiting enzyme in the biosynthesis of prostaglandin E(2) (PGE(2)), is highly expressed in endometriotic tissues and results in increased concentrations of peritoneal PGE(2) in women. In this study, we determined the expression of COX-2 protein in ectopic and eutopic endometria in humans and the role of COX-2 in endometriotic cell survival, migration, and invasion in humans. Our results indicate that COX-2 protein is abundantly expressed in ectopic endometria compared with eutopic endometria. Comparatively, expression of COX-2 protein is higher in eutopic endometria from women with endometriosis compared with women without endometriosis. Inhibition of COX-2 decreases survival, migration, and invasion of endometriotic cells that are associated with decreased production of PGE(2). Cell growth inhibitory effects of COX-2 inhibition/silencing are mediated through nuclear poly (ADP-ribose) polymerase-mediated apoptosis. Cell motility and invasion inhibitory effects of COX-2 inhibition/silencing are mediated through matrix metalloproteinase-2 and -9 activities. Interestingly, effects of COX-2 inhibition is more profound in endometriotic epithelial than in stromal cells. Furthermore, inhibition of COX-2 affects invasion rather than migration of endometriotic epithelial and stromal cells. It is the first evidence showing that inhibition of COX-2 decreases endometriotic epithelial and stromal cell survival, migration, and invasion in humans. Our results support the emerging concept that COX-2/PGE(2) promotes the pathophysiology and pathogenesis of endometriosis in humans.

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Condition tags

mesh:D004715endometriosis

MeSH descriptors

Cell Movement Cyclooxygenase 2 Endometrium Epithelial Cells Stromal Cells Apoptosis Apoptosis Cell Movement Cells, Cultured Cell Survival Cell Survival Cyclooxygenase 2 Cyclooxygenase 2 Dinoprostone Dinoprostone Endometriosis Endometriosis Endometrium Endometrium Endometrium

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