食管鳞状细胞癌中p16和cyclinD1的表达及其临床意义

 目的　探讨p16、cyclinD1蛋白在食管鳞状细胞癌（ESCC）组织中的表达及其与临床病理之间的关系。方法　应用免疫组织化学法，对55例手术切除的原发ESCC患者的肿瘤组织蜡块进行p16和cyclinD1蛋白的检测。结果　55例ESCC患者中p16蛋白表达率为49.1 %（27／55）。p16蛋白缺失与淋巴结转移有一定的相关性（P＜0.05）；p16表达阳性者5年生存率为71.4 %（10／14）。55例ESCC中cyclinD1蛋白表达率为74.5 % （41／55），cyclinD1阳性表达患者的5年生存率低于阴性表达患者。结论　ESCC患者的p16蛋白表达缺失较常见， p16蛋白的失表达与cyclinD1基因蛋白过表达在食管癌发生及转移过程中可能有协同作用，可作为判断预后的参考指标之一。

Expression of p16, cyclinD1 protein and clinicopathological significance in esophageal squamous cell carcinoma

Objective To investigate the expressions of p16, cyclinD1 protein in esophageal squamous cell carcinoma and its clinic significance. Methods The expressions of p16 and cyclinD1 protein in 55 esophageal carcinoma cases were detected by immunohistochemical technique. Results The positive expression of p16 protein in 55 patients was 49.1%(27/55). The loss of p16 protein was significantly related to lymph node metastasis (P ＜0.05), and the positive expression of p16 had the higher five-year survival rate.Conversely, the positive expression of cyclinD1 in 55 patients was 74.5 % (41/55), and had the lower five-year survival rate compared to the negative expression cases. Conclusion Loss of p16 protein in human ESCC is a frequent event and correlates significantly with the lymph node metastasis. The loss of p16 and the over expression of cyclinD 1 in esophageal carcinoma may serve as a risk prognosis factors.