{"paper_id":"e596b21e-79cc-4456-84de-5ea11e96c3fb","body_text":"Abstract\nPurpose\nInflammatory mediators, including chemokines, may play crucial roles in the development of endometriosis. Therefore, we investigated the expression and localization of CXCL16 and its receptor, CXCR6, in ovarian endometriotic tissues. We also examined whether CXCL16 induces IL-8 production in endometriotic stromal cells.\nMethods\nWe performed immunohistochemical and Western blotting analyses of in vivo and in vitro samples. IL-8 production was assayed using an ELISA.\nResults\nBoth CXCL16 and CXCR6 were expressed by endometriotic epithelial cells and stromal cells, but not normal ovarian stroma. A Western blotting analysis using primary cultured endometriotic stromal cells showed a constant expression of CXCL16 and CXCR6 in the proliferative phase, secretory phase and during gonadotropin-releasing hormone agonist therapy. CXCL16 induced IL-8 production in several endometriotic stromal cells in vitro.\nConclusions\nCXCL16 and CXCR6 might be involved in the pathophysiology of endometriosis through regulation of the inflammatory response.\nSimilar content being viewed by others\nReferences\nOzkan S, Murk W, Arici A (2008) Endometriosis and infertility: epidemiology and evidence-based treatments. Ann N Y Acad Sci 1127:92–100. doi:1127/1/92[pii]10.1196/annals.1434.007\nSampson JA (1927) Metastatic or embolic endometriosis, due to the menstrual dissemination of endometrial tissue into the venous circulation. Am J Pathol 3(2):93–110 143\nde Ziegler D, Borghese B, Chapron C (2010) Endometriosis and infertility: pathophysiology and management. Lancet 376(9742):730–738. doi:S0140-6736(10)60490-4[pii]10.1016/S0140-6736(10)60490-4\nAgic A, Xu H, Finas D, Banz C, Diedrich K, Hornung D (2006) Is endometriosis associated with systemic subclinical inflammation? 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Expression and localization of CXCL16 and CXCR6 in ovarian endometriotic tissues. Arch Gynecol Obstet 284, 1567–1572 (2011). https://doi.org/10.1007/s00404-011-2002-y\nReceived:\nAccepted:\nPublished:\nIssue date:\nDOI: https://doi.org/10.1007/s00404-011-2002-y","source_license":"CC0","license_restricted":false}