CD40蛋白质在膀胱尿路上皮癌组织中的表达及其临床意义

 目的　研究CD40在膀胱尿路上皮癌的表达，探讨其与肿瘤分期、病理分级、细胞凋亡之间的相关性。方法　采用免疫组织化学技术检测20例膀胱癌旁组织及78例膀胱尿路上皮癌组织中CD40的表达状况，Hoechst法检测膀胱尿路上皮癌组织细胞凋亡情况，确定凋亡率。结果　CD40在20例膀胱癌旁组织中2例表达（10 %），在78例膀胱尿路上皮癌组织中55例表达（70.5 %），差异有统计学意义（P＜0.01），CD40的表达与膀胱尿路上皮癌的临床分期、病理分级呈负相关。CD40阳性组细胞凋亡率为（12.60±0.38）%，阴性组细胞凋亡率为（6.77±0.53）%，差异有统计学意义（P＜0.01），提示CD40可能诱导细胞凋亡。结论　CD40在膀胱尿路上皮癌组织的表达与肿瘤的临床分期、病理分级、细胞凋亡密切相关，可为膀胱尿路上皮癌的诊断、治疗及指导预后提供实验依据。

Expression and clinical significance of CD40 protein in human bladder cancer tissue

Objective To investigate the expression of CD40 protein in bladder urothelium cancer and to explore its correlation with clinical stage, pathological grades, cell apoptosis. Methods Expression of CD4o protein was evaluated by immunohistochemistry in paracancerous tissues (20 cases) and bladder urothelium cancer tissues (78 cases). Apoptosis of bladder urothelium cancer tissues was detected by Hoechst to determine the apoptotic rate (AR). Results The expression rate of CD40 protein was 2/20(10 %) in the cases of paracancerous tissues, 55/78(70.5%) in the cases of bladder urothelium cancer tissues, a statistically significant differences of CD40 staining was observed between paracancerous tissues and bladder urothelium cancer tissues (P ＜0.01). Overexpression of CD40 was strongly inversely related to the tumor grade and clinical stage; the positive group of CD40 protein was (12.60±0.38)%, the negative group of CD40 protein was (6.77±0.53)%, a statistically significant differences of apoptosis were observed between CD40 protein positive group and CD40 protein negative group (P ＜0.01). It showed CD40 protein might induce cell apoptosis. Conclusion Expression of CD40 protein is closely related with clinical stage, pathological grade and cell apoptotic rate and may offer reliable evidence for diagnosis, treatment and prognosis in bladder urothelium cancer.