摘要
目的 研究环氧合酶 2 (cyclooxygenase 2 ,cox 2 )在正常食管黏膜、食管黏膜鳞状上皮不典型增生和食管鳞状细胞癌组织中的表达 ,探讨cox 2在食管鳞状细胞癌发生发展中的作用。方法 用免疫组织化学染色和蛋白质免疫印迹方法检测 86例食管鳞癌、4 7例食管黏膜鳞状上皮不典型增生和 4 2例癌周正常组织cox 2的表达。结果 食管鳞状细胞癌、食管黏膜鳞状上皮不典型增生组织中cox 2表达显著增高 ,免疫组织化学染色积分分别为 2 .6 7± 1.77和 2 .19± 1.79,而正常食管黏膜组织的cox 2无表达或表达极弱 ,免疫组织化学染色积分为 0 .71± 0 .4 6。蛋白质免疫印迹检测的结果与免疫组织化学的检测结果相似。在食管鳞状细胞癌、食管黏膜鳞状上皮不典型增生组织中 ,cox 2表达与细胞增殖活力显著相关 ,而在正常食管黏膜组织中二者无相关关系。食管鳞状细胞癌cox 2的表达与其临床病理特征如年龄、性别、癌肿大小、分化程度、临床分期、淋巴结是否转移等无关。结论 cox 2在食管黏膜鳞状上皮不典型增生和食管鳞状细胞癌组织中表达增高 ,并与细胞增殖活力有关 ,提示cox 2在食管鳞状细胞癌发生发展过程中起重要作用。
Objectives To investigate the expression of cyclooxygenase-2 (cox-2) protein in normal squamous epithelium, squamous dysplasia and squamous cell carcinoma of the esophagus, and to elucidate the role of cox-2 in esophageal carcinogenesis. Methods Biopsy specimens of atypical esophageal dysplasia ( n =47) and surgical resection of squamous cell carcinoma ( n =86) were compared with normal esophageal specimens ( n =42) and the expression of cox-2 in those specimens was analyzed by immunohistochemistry and westeron blotting. Results A significant elevated cox-2 expression was shown in atypical esophageal squamous dysplasia and squamous cell carcinoma, as compared to that in normal esophageal squamous epithelium, with immunohistochemical stain scores of 2.67±1.77, 2.19±1.79 and 0.71±0.46, respectively. Results of western blotting analysis confirmed those obtained by immunohistochemistry. Cox-2 expression significantly correlated with proliferation activity assessed by proliferating cell nuclear antigen index in dysplastic and carcinomous lesions, respectively, and no such correlation could be found in normal esophgeal mucosa. Elevated cox-2 expression was not associated with clinicalpathological features of esophgeal squamous carcinoma, including age, gender, tumor size, histological grade, lymph node metastasis and clinical stage. Conclusion Elevated expression of cox-2 in atypical squamous dysplasia and squamous cell carcinoma of the esophagus, which correlated with cell proliferation activity, indicated that cox-2 may be involved in the early stage of squamous carcinogenesis of the esophagus, and may be a target of prevention and treatment for esophageal squamous cell carcinoma.
出处
《中华预防医学杂志》
CAS
CSCD
北大核心
2004年第1期22-25,F004,共5页
Chinese Journal of Preventive Medicine
基金
国家自然科学基金重大课题资助项目 (3 9990 5 70 )
