CD44和NANOG在上皮性卵巢癌中的表达及其临床意义

摘要

目的:探讨上皮性卵巢癌(epithelial ovarian cancer,EOC)中CD44及转录因子NANOG的表达及其临床意义.方法:用免疫组织化学法检测良性卵巢肿瘤和EOC组织中CD44及NANOG的表达,并对EOC中CD44和NANOG的表达水平做相关性分析.Western blot法检测不同浓度顺铂对卵巢癌SKOV3细胞中CD44及NANOG蛋白表达水平的影响.结果:CD44和NANOG在EOC中的阳性表达率均明显高于良性卵巢肿瘤组织(P<0.01);EOC中CD44与NANOG的表达水平呈正相关(r=0.346,P<0.01).CD44在EOC中的阳性表达率与临床分期和淋巴结转移有关(P<0.05),而与年龄、病理分级、病理类型和肿瘤位置无关;NANOG在EOC中的阳性表达率与病理分级和临床分期有关(P<0.05),而与年龄、病理类型、淋巴结转移和肿瘤位置无关.顺铂可诱导卵巢癌SKOV3细胞中CD44和NANOG表达上调(P<0.05).结论:CD44和NANOG在EOC中高表达,且与EOC发生和发展有关.顺铂可诱导卵巢癌SKOV3细胞中肿瘤干细胞标记物CD44及胚胎干细胞多能性基因产物NANOG表达升高.肿瘤干细胞的产生可能是促进EOC发生、发展及化疗耐药的潜在机制.%AIM:To investigate the expression of CD44 and transcription factor NANOG in epithelial ovarian cancer(EOC)and its clinical significance.METHODS:The expression of CD44 and NANOG in EOC and benign ovarian tumor tissues were detected by immunohistochemical method.The correlation between the expression of CD 44 and NANOG in EOC was analyzed.The expression of CD44 and NANOG in ovarian cancer cell line SKOV3 after treatment with cisplatin at different concentrations were detected by Western blot.RESULTS:The positive expression rates of CD44 and NANOG in EOC were significantly higher than those in benign ovarian tumor tissues(P<0.01).In EOC,positive correlation was observed between the expression of CD 44 and NANOG(r=0.346,P<0.01).The positive expression rate of CD44 was associated with clinical stage and lymphatic metastasis(P<0.05), and had no relationship with age, histological grade, pathological types and the location of tumors.The positive expression rate of NANOG was associated with clinical stage and histological grade(P<0.05),and had no relationship with age,lymphatic metastasis,pathological types and the location of tumors.Increased expression of CD44 and NANOG were detected in ovarian cancer cell line SKOV 3 after treatment with cisplatin(P<0.05).CONCLUSION:The over-expression of CD44 and NANOG are associated with the occurrence and development of EOC.The expression of cancer stem cells marker CD 44 and the pluripotent gene product pertaining to em-bryonic stem cells NANOG are increased in cisplatin-induced SKOV3 cells.Cancer stem cells and the expression of stem-ness-related gene may well be the underlying pathogenesis that promotes the onset, progression, and chemotherapy resist-ance of EOC.