喉癌组织中程序性细胞死亡因子4的表达及临床意义

The expression and clinical pathological significance of PDCD in laryngocarcinoma

目的:探讨程序性细胞死亡因子4(PDCD4)基因在喉鳞状细胞癌中的表达情况及PDCD4蛋白表达水平与喉癌临床病理学特征的关系。方法:应用Westernblot检测8例喉鳞状细胞癌患者喉癌组织及癌旁正常鳞状上皮组织中PDCD4蛋白的表达水平。应用免疫组织化学SP法检测PDCD4蛋白在54例喉癌组织及部分癌旁正常组织中的表达情况及PDCD4蛋白在这些组织中的细胞定位,观察PDCD4蛋白表达情况与喉癌临床病理学参数之间的关系。结果:PDCD4蛋白在癌旁正常组织中呈高表达,在喉癌中呈低表达或缺失(P<0.05)。PDCD4蛋白在喉正常鳞状上皮细胞核、细胞质表达,在喉癌组织中呈细胞质表达甚至缺失。PDCD4蛋白表达水平在喉癌病理分级各组间不相等(P<0.05),肿瘤分化程度越高,PDCD4蛋白表达越高(P<0.05)。结论:PDCD4基因是抑癌基因,其表达和缺失与喉癌的发生、肿瘤细胞的分化有关,有望成为喉癌基因治疗的新靶点。

Objective：To investigate the expression and clinical pathological significance of PDCD4 in laryngocarcinoma tissue and its potential significance to clinic.Method：Western-blotting and immunohistochemistry analyse to measure the protein expression of PDCD4 in 54 cases of laryngocarcinoma tissues（studying group） and their paraneoplastic normal tissues （control group）. The correlations of PDCD4 with clinical pathological parameters were analyzed.Result：PDCD4 protein was positively expressed in paraneoplastic normal tissue while which was lost or decreased in laryngocarcinoma tissue by Western blot and immunohistochemistry. Immunohistochemistry assay showed the location of PDCD4 protein in cells was different between the studying group and the control group. The expression level of PDCD4 was related to the pathological grades of the laryngocarcinoma. It＇s higher in the well-differentiated tumor group than that in the poorly differentiated ones. But the expressions of PDCD4 were no differences among other clinical parameters including sex, age, clinical classification, clinical stage and the cervical lymphonodes who had been metastased or not.Conclusion：PDCD4 gene is anti-oncogene. It may play an important role in the pathogenesis and development of laryngeal carcinoma and it may be a new target of therapy for laryngocarcinoma.