HPA和HIF-1α在食管鳞癌发生发展中的表达及生物学意义

目的探讨乙酰肝素酶(HPA)和缺氧诱导因子-1α(HIF-1α)与食管鳞癌发生、发展的关系。方法应用原位杂交技术检测70例食管鳞癌组织、26例癌旁不典型增生组织和23例切缘正常组织中HPAmRNA表达,同时,应用免疫组化法检测HIF-1α蛋白在全部标本中的表达。结果HPA mRNA和HIF-1α的阳性表达率在正常食管组织、癌旁不典型增生组织和食管癌组织中依次增高(P<0.05);HPA mRNA和HIF-1α的表达与食管鳞癌侵袭深度、淋巴结转移及临床分期有关(P< 0.05),而与分化程度无关(P>0.05)。在食管鳞癌组织中,HPA mRNA的表达与HIF-1α的表达显著相关(P<0.01)。结论HPA mRNA和HIF-1α阳性表达与食管鳞癌的生长、侵袭及转移有关,两者在食管鳞癌的发生、发展过程中可能存在着一定的协同作用;检测HPA mRNA与HIF-1α表达有助于食管鳞癌生物学性能的判断。

Expression and biological significance of HPA and HIF-1alpha in human esophageal squamous cell carcinoma

OBJECTIVE: To investigate the expression of HPA and HIF-1alpha in human esophageal squamous cell carcinoma and their relationship with cancer development, invasion and metastasis. METHODS: The expression of HPA mRNA and HIF-1alpha protein in 23 mucosa specimens of incisal margin, 26 para-tumorous dysplastic tissues and 70 esophageal squamous cell carcinoma specimens were detected by in situ hybridization assay and immunohistochemical staining, respectively. RESULTS: The positive expression of HPA mRNA and HIF-1alpha protein were significantly increased as the epithelial cells progressed into carcinoma (P < 0.05). The expression of HPA mRNA and HIF-1alpha protein in the esophageal squamous cell carcinoma were significantly correlated with the invasion depth, lymph node metastasis and clinical staging (P < 0.05), while it was not correlated with the differentiation of tumors (P > 0.05). There was a close correlation between the expression of HPA mRNA and HIF-1alpha protein in the carcinoma tissues (P < 0.01). CONCLUSION: The high expression of HPA mRNA and HIF-1alpha protein is correlated with carcinogenesis, progression, invasion and metastasis of esophageal squamous cell carcinoma. There may be a positive cooperation between two of them in the carcinogenesis and development of esophageal carcinoma. The determination of HPA mRNA and HIF-1 alpha will be useful in predicting tumor biological behavior.