食管鳞癌组织中缺氧诱导因子-1α和6-氧-甲基鸟嘌呤-DNA甲基转移酶蛋白的表达与预后的关系

摘要

目的 研究食管鳞状细胞癌(ESCC)中缺氧诱导因子-1α(HIF-1α)、6-氧-甲基鸟嘌呤-DNA甲基转移酶(MGMT)蛋白的表达及其与食管癌病理特征的关系.方法 采用免疫组织化学(SP)法检测58例食管鳞癌组织中HIF-1α、MGMT蛋白的表达,并分析其与临床病理各因素之间的关系.结果 58例患者的ESCC组织中HIF-1α、MGMT蛋白均有表达,阳性表达率分别为51.4%、39.6%,MGMT 蛋白的表达与食管鳞癌的分化程度密切相关(P<0.05),而与性别、年龄、分期及淋巴结转移无关.HIF-1α蛋白的表达与性别、年龄、分期、分化程度以及淋巴结转移均无关(P均>0.05).HIF-1α与MGMT 蛋白表达无明显相关关系(P>0.05).MGMT阳性表达患者生存时间(OS)较阴性组明显延长(P<0.05),而HIF-1α蛋白表达与OS无明显相关(P>0.05).结论 HIF-1α蛋白在食管鳞癌组织中呈高表达,MGMT与其分化程度相关,两者检测对判断预后有重要意义.%Objective To investigate the expression of hypoxia-inducible factor-1α (HIF-1α) and O~6-methylguanine DNA methytransferase(MGMT) in esophageal squamous cell carcinoma(ESCC) tissue and its relation with the clinicopathalogy features. Methods The expression of HIF-1α, MGMT in 58 cases of ESCC were detected by immnohistochemical staining. Results The positive rates of HIF-1α,MGMT in ESCC tissue were 51.4%,39.6%, respectively. The positive expression rates of HIF-1α and MGMT were not correlated with the degree of sex,age,clinical stage and differentiation(P>0.05), but MGMT expression was correlated with differentiation and overall survival time (P<0.05). The expression of HIF-1α was not correlated with that of MGMT (P>0.05), and HIF-1α was not correlated with overall survival time. Conclusions HIF-1α, MGMT play important roles in esophageal carcinoma,MGMT was correlated with the differentiation of esophageal carcinoma, respectively, which may be used as important indexes to evaluate the prognosis of esophageal carcinoma.