Abstract

Abstract Ovarian carcinoma (OvCa) is the most lethal gynecological malignancy among women and its poor prognosis is mainly due to metastasis. Chemokines and their corresponding receptors play an important role in metastasis and organ specific homing of cancer cells including OvCa. CXCL13 is a homeostatic chemokine for lymphocyte- and prostate cancer cell-homing and -positioning within secondary lymphoid tissues. This important chemokine acts through its only known receptor, CXCR5. In this study, we provide the first evidence that in OvCa CXCR5 and CXCL13 are highly elevated in OvCa cell lines and clinical samples. Flow cytometry analysis of OvCa cell lines (OVCAR-3 and SK-OV-3) show significantly higher expression of CXCR5 in comparison to normal adult ovarian epithelial cells. To determine the clinical significance of CXCR5 expressed by OvCa cell lines, ovarian cancer tissue microarrays were stained for CXCR5 and CXCL13. Aperio ScanScope scanning system was used to quantify the immuno-histochemical staining of CXCR5 and CXCL13. Our results show significantly higher expression of CXCR5 and CXCL13 (p < 0.001) in cancerous tissue than compared to non-neoplastic ovarian tissue. Among cancerous tissues, CXCR5 and CXCL13 expression was highest in serous adenocarcinoma followed by serous papillary cystadenoma, endometrioid adenocarcinoma, mucinous adenocarcinoma, cystadenoma, mucinous boderline adenocarcinoma, clear cell carcinoma, granulosa cell tumor, dysgerminoma, transitional cell carcinoma, brenner tumor, yolk sac tumor, adenocarcinoma and fibroma. These data demonstrate biological and clinical significance of CXCR5 and CXCL13 as an OvCa biomarker. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 3649. doi:1538-7445.AM2012-3649

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