肺表面活性物质相关蛋白A在肺癌组织中的表达及意义

目的研究肺表面活性物质相关蛋白A（SPA）在肺腺癌和鳞状细胞癌组织中的表达及其临床意义。方法应用免疫组化EnVision二步法,检测27例肺腺癌、15例鳞状细胞癌组织中SP—A的表达,并分析其与临床病理诸因素之间的关系。结果SP-A在肺腺癌、鳞状细胞癌组织中的阳性表达率分别为51．85％、6．67％,腺癌组织中SP—A的表达明显高于鳞状细胞癌组织（P〈0．01）。SP—A在乳头状腺癌、细支气管肺泡癌、腺泡性腺癌和黏液性腺癌组织中的表达率依次为85．71％、50％、40％和25％。SP-A的表达与患者性别、年龄、肿瘤直径大小和淋巴结转移均无关。结论SPA的表达可能与肺癌的组织学类型有关,可作为鉴别肺腺癌与鳞状细胞癌的参考指标。

Expression of surfactant protein A in lung carcinoma and its clinical significance

Objective To investigate the expression of surfactant protein A(SP-A)in adenocarcinoma and squamous cell carcinoma of lung and its clinical significance.Methods The expression of SP-A was determined by immunohistochemical assay (EnVision) in 27 cases of adenocarcinoma,15 cases of squamous cell carcinoma of lung.Then the association of SP-A expression with clinicopathological parameters was analyzed.Results The expression rate of SP-A was significantly higher in adenocarcinoma of lung than that in squamous cell carcinoma of lung(51.85% vs 6.67%,P<0.01).The expression rate of SP-A in papillary adenocarcinoma,bronchioloalveolar carcinoma,acinar adenocarcinoma and musinous adenocarcinoma of lung was respectively 85.71%,50%,40%and 25%.There was no correlation between the expression of SP-A and gender,age,tumor size and lymph node metastasia.Conclusion The expression of SP-A may be associated with histological types of the lung carcinoma,which may be used as important marker in differential diagnosis of adenocarcinoma and squamous cell carcinoma of lung.