p53、bcl—2基因在喉鳞癌中的蛋白表达及其临床意义

目的 探讨细胞凋亡相关基因p53,bcl-2与喉鳞癌的关系。方法 应用免疫组化ABC法对60例喉鳞癌和8例声带息肉标本中的p53,bcl-2基因的蛋白表达进行检测。结果 60例喉鳞癌中p53,bcl-2基因蛋白的表达阳性率均较高，分别为61．7％（37／60）和43．3％（26／60），并且其阳性表达率与喉鳞癌的病理分化程度和预淋巴结转移有关（P＜0．05）。而与喉鳞癌的临床分期和分型无关（P＞0．05）。8例声带息肉标本的p53,bcl-2基因蛋白的表达均为阴性。结论 本实验从蛋白水平上证实了喉鳞癌与p53,bcl-2基因的关系，提示此两种基因可能参与了喉鳞癌细胞凋亡的调节，对喉鳞癌的发生可能起着重要的作用。

The protein expression of p53 and bcl-2 in laryngeal squamous cell carcinoma]

OBJECTIVE: To detect the relationship of p53 and bcl-2 gene to laryngeal carcinoma. METHODS: p53 and bcl-2 protein expressions were examined in the specimens of 60 laryngeal carcinomas and 8 vocal cord polyps by immunohistochemistry method. RESULTS: Overexpressions of p53 and bcl-2 were found in the laryngeal carcinoma specimens; the positive rates of p53 and bcl-2 protein expression were 61.7%(37/60) and 43.3%(26/60), respectively. Negative results were observed in all the vocal cord polyp specimens. The positive rates of p53 and bcl-2 expression were related to the histological grade and cervical lymphatic metastasis of laryngeal carcinoma but not related to clinical stage and tumor types. CONCLUSION: The results of this study support the hypothesis that p53 and bcl-2 gene may be involved in the apoptosis of laryngeal carcinoma and they may play an important role in the pathogenesis of laryngeal cancer.