SV40大T抗原在人脑肿瘤中的表达

EXPRESSION OF SV40 LARGE T ANTIGEN IN HUMAN BRAIN TUMORS

目的 检测 Ｓ Ｖ４０ 早期区域基因编码产物大 Ｔ 抗原（ Ｔａｇ）在人脑肿瘤中的表达，探讨 Ｓ Ｖ４０ 与人脑肿瘤发生的病因学关系。方法 采用免疫共沉淀、银染色及 Ｗｅｓｔｅｒｎ印迹检测 ６５ 例人脑肿瘤组织、８ 例正常人脑组织及 ２ 株人脑胶质瘤细胞系中 Ｔａｇ 的表达。结果 Ｔａｇ 在 ８ 例室管膜瘤、２ 例脉络丛乳头状瘤及 ２ 株人脑胶质瘤细胞系中全部表达；垂体腺瘤 Ｔａｇ 阳性率为 ９０％ （９／１０），星形胶质细胞瘤７３％ （１１／１５），脑 膜瘤 ７０％ （７／１０），多形性 胶质母细胞 瘤５０％ （４／８），髓母细胞瘤 ３３％ （２／６）；５ 例少枝胶质细胞瘤、１例松果体瘤及 ８ 例正常人脑组织无 Ｔａｇ 表达。结论 Ｓ Ｖ４０感染与人脑肿瘤的发生有一定关系。

Objective To investigate the expression of SV40 early region gene coding the large T antigen (Tag) in human brain tumors, and to study its relation to etiopathogenesis of human brain tumors.Methods Tag was determined by immunoprecipitation, silver staining and Western blot in 65 cases of human brain tumors, 2 human glioma cell lines and 8 cases of normal brain tissues. Results Tag was found in all of 8 ependymomas, 2 choroid plexus papillomas, 2 human glioma cell lines, 90% of pituitary adenomas (9/10), 73% of astrocytomas (11/15), 70% of meningiomas (7/10), 50% of glioblastomas multiforme (4/8), and 33% of medulloblastomas (2/6). None of the 8 normal brain tissues were positive for Tag, nor were 5 oligodendrogliomas and 1 pineocytoma. Conclusions SV40 is associated closely with the etiopathogenesis of human brain tumors.$$$$