hMena在胶质瘤中的表达及分布特征

Expression and distribution characteristics of human orthology of mammalian enabled in glioma

目的 观察人脑胶质瘤中hMena蛋白的表达情况及分布特征,并分析其表达与病理分级的相关性. 方法 选择天津医科大学总医院神经外科自2008年8月至2009年12月间手术切除并经病理证实的胶质瘤标本65例（WHO Ⅰ级9例,Ⅱ级16例,Ⅲ级19例,Ⅳ级21例）,其中6例胶质母细胞瘤（GBM,Ⅳ级）患者术中在神经导航系统引导下在肿瘤实体区、肿瘤与脑组织交界区和瘤周1.5 cm处取材,另取同期5例因脑出血行减压术患者的正常脑组织标本作为对照.应用免疫组化染色与Western blotting检测标本中hMena蛋白的表达情况和分布特征. 结果 免疫组化染色结果显示对照脑组织中无hMena阳性染色,胶质瘤hMena阳性染色定位于胞浆,不同级别胶质瘤中hMena的表达差异有统计学意义（x2=34.935,P=0.000）,hMena的表达与胶质瘤的分级呈正相关关系（rs=0.682,P=0.000）.Westemblotting检测发现不同病理分级的胶质瘤中,hMena的表达水平随病理级别升高而逐渐升高. 结论 hMena蛋白可能在胶质瘤恶性进展中发挥作用.

Objective To observe the expression and distribution characteristics of human orthology of mammalian enabled （hMena） in human glioma, and analyze the correlation of its expression with the pathological grade of the glioma. Methods Sixty-five specimens of glioma with different pathological grades were collected; among these samples, according to the WHO classification, grade Ⅰ was noted in 9, grade Ⅱ in 16, grade Ⅲ in 19 and grade Ⅳ in 21; in 6 of these patients with grade Ⅳ glioblastoma multiforme, tissues from the lesion, the junctional zone between the glioma and the normal brain tissue, and the surrounding area （with a diameter of 1.5 cm） were separated under the assistance of neuronavigation system. Another 5 normal brain tissues from patients with cerebral hemorrhage performed decompression were chosen as controls. Immunohistochemistry and Western blotting were used to detect the expression and distribution characteristics of hMena. Results The hMena expression was negative in control brain tissue, and its positive rates of gliomas with different grades were 11.11% （1/9）, 25% （4/16）, 84.21% （16/19） and 90.48% （19/21） in gliomas of grade Ⅰ, grade Ⅱ, grade Ⅲ and grade Ⅳ, respectively; and these staining was mainly located in cytoplasm; the hMena expression in gliomas with different grades was significantly different （x2=34.935, P=0.000）. The expression rate of hMena was positively correlated with the increasing grade of WHO classification （rs=0.682, P=0.000）.Western blotting indicated that, in gliomas with different pathological grades, hMena expression levels increased gradually with the increase of pathological grade. Conclusion The hMena protein might play a role in the malignant progression of glioma.