DJ-1蛋白在喉鳞状细胞癌中的表达及其与复发和转移的关系

目的 探讨喉鳞状细胞癌(简称鳞癌)中DJ-1蛋白表达水平与喉鳞癌临床病理特征的关系.方法 将1995年1月至2006年1月收治的71例喉鳞癌患者术后肿瘤组织和9例非喉癌者喉黏膜组织应用免疫组织化学法检测,分析其DJ-1蛋白表达水平与临床病理特征的关系.结果 喉鳞癌组织中DJ-1蛋白阳性表达率为85.9%(61/71),与非喉痛的喉黏膜组织55.5%(5/9)比较,差异有统计学意义(精确概率法P<0.05).分别就患者的性别、年龄、原发部位、T分期、临床分期、淋巴转移和肿瘤的病理学分级等情况进行分组比较,各组间喉鳞癌组织中DJ-1蛋白表达水平的差异均无统计学意义;DJ-1蛋白高表达患者其肿瘤复发率(53.3%)明显高于DJ-1蛋白低表达患者的复发率(26.8%;x2=5.164,P<0.05).Kaplan-Meier法和Cox回归分析发现喉鳞癌患者的肿瘤原发部位、性别、年龄、T分期、临床分期和肿瘤病理学分级对术后累积生存率影响均无统计学意义;DJ-1蛋白表达水平和淋巴转移对术后累积生存率影响有统计学意义(X2值分别为6.20和3.97,P值均<0.05).结论 DJ-1蛋白在喉鳞癌组织的表达水平高于喉黏膜组织.DJ-1蛋白表达水平较高的喉癌患者生存率可能低.

DJ-1 expression in laryngeal squamous cell carcinoma and its relationship with tumor recurrence and metastasis

Objective To detect the expression of DJ-1 in laryngeal squamous cell carcinoma (LSCC) and to study the relationship between DJ-1 expression and clinical indexes of LSCC. Methods The expressions of DJ-1 protein in 71 LSCC samples and 9 cases control samples from laryngeal mucosa tissues of non-LSCC patients were detected using streptavidin peroxidase immunohistochemistry stainin and the relationships between DJ-1 protein expression and clinicopathologic characteristics were analyzed. Results ( 1 ) The positive expression rate of DJ-1 protein in LSCC was 85.9% (61/71), which was significantly higher than the rate (55.5% ,5/9) in control laryngeal mucosa tissues (P<0.05). (2) DJ-1 expression was related to tumor recurrence (P <0. 05) ,but not to sex,age,primary cancer position,T stage, clinical stage, lymph node metastasis and tumor differentiation. Tumor recurrence rate (53. 3% ) in the patients with higher expression of DJ-1 protein was higher than the rate ( 26. 8% ) in the patients with lower expression of DJ-1 protein ( X2 = 5. 164, P < 0. 05 ). (3 ) With Kaplan-Meier curves and Cox regression analysis,the cumulative 5-year survival rates were correlated with DJ-1 expression levels in laryngeal cancer tissues or cervical lymph node metastasis (all P < 0. 05 ), but not to sex, age, primary cancer position, T stage, clinical stage and tumor differentiation. Conclusions The expression of DJ-1 protein in LSCC is higher than that in control laryngeal mucous tissues. Overexpression of DJ-1 is associated with poor overall survival in ISCC patients.