膀胱尿路上皮癌组织中Snail蛋白表达与E-cadherin蛋白、T细胞亚群的相关性分析

目的 研究膀胱尿路上皮癌组织中Snail蛋白表达与E-cadherin蛋白、T细胞亚群的相关性。 方法 采用免疫组化SP法检测156例膀胱尿路上皮癌组织和80例癌旁组织中Snail蛋白、E-cadherin蛋白的表达情况，比较二者在不同病理组织中的阳性表达率，并分析二者表达的相关性；分析膀胱尿路上皮癌组织中Snail蛋白阳性表达和CD4+、CD8+细胞数量及CD4+/CD8+的相关性。结果膀胱尿路上皮癌组织Snail蛋白阳性表达率65.4％(102/156)显著高于癌旁组织的48.8％(39/80)，差异有统计学意义(P＜0.05)；其表达与膀胱尿路上皮癌的临床分期、病理分级、肿瘤数量、远处转移及复发有关（P值均＜0.05）。膀胱尿路上皮癌中Snail蛋白与E-cadherin蛋白表达呈负相关（r= -0.186，P＜0.05）；Snail蛋白阳性表达与CD4+细胞数量以及CD4+/CDt+值呈负相关(r=-0.313，P＜0.05；r=-0.305，P＜0.05)，而与CDs+细胞数量无关（r= -0.250，P＞0.05）。 结论 Snail蛋白可能通过抑制E-cadherin蛋白表达及诱导膀胱肿瘤局部免疫抑制，促进膀胱尿路上皮癌的浸润、转移。

Expression of Snail in bladder urothelial carcinoma and its relationship with E-cadherin and a subset of T cell Groups

Objective To investigate the expression of Snail in bladder urothelial carcinoma and evaluate its relationship with E-cadherin and a subset of T cell groups.Methods Immunohistochemical method was used to detect the expression of Snail and E-cadherin proteins in tissue from 156 cases of bladder urothelial carcinoma and 80 cases of the para-cancerous mucosa. The proteins expression status was analyzed with clinico-pathological data. Meanwhile, correlations with Snail and CD4+, CD8+, CD4+/CD8+ were analyzed.Results The positive rate of Snail in bladder urothelial carcinoma was 65.4％ , which was significantly higher than that in para-cancerous mucosa (48.8％). The expression of Snail was significantly correlated with the clinical stage, pathological grade, tumor quantity, distant metastasis and tumor recurrence.There was negative correlation between the expression of Snail and E-cadherin in bladder urothelial carcinoma. Positive expression of Snail had a negative correlation with the number of CD4+ and CD4+/CD8+ , whereas it had no significant correlation with the number of CD8+.Conclusions By inhibition of the E-cadherin expression and inducing local immunosuppression, Snail might play an important role in the process of the invasion and metastasis of bladder urothelial carcinoma.