Simian virus 40 large tumor antigen forms specific complexes with p53 and pRb in human brain tumors

来源 :中华医学杂志 | 被引量 : 0次 | 上传用户:shilinjun2000
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
目的探讨SV40早期区域基因编码产物大T抗原(Tag)的表达及其与抑癌蛋白p53、pRb的相互作用在人 脑肿瘤发生、发展中的意义。方法采用免疫共沉淀结合银染色及Western印迹法检测65例人脑肿瘤及8例正常人脑组织中Tag的表 达,并对18例和15例Tag阳性瘤组织分别检测Tag-p53和Tag-pRb复合物的形成。 结果Tag在8例室管膜瘤及2例脉络丛乳头状瘤中全部表达,垂体腺瘤Tag阳性率为90%(9/10),星形 细胞瘤为73%(11/15),脑膜瘤为70%(7/10),多形性胶质母细胞瘤为50%(4/8),髓母细胞瘤为33%(2/ 6);5例少枝胶质细胞瘤、1例松果体细胞瘤及8例正常人脑组织无Tag表达;检测18例和15例Tag阳性 瘤组织,均发现Tag可与p53、pRb形成特异性复合物。 结论在人脑肿瘤组织中Tag不仅可以表达,而且还可与p53、pRb形成特异性复合物。Tag-p53及Tag- pRb特异性复合物的形成导致p53和pRb失活,这可能是SV40导致人脑肿瘤发生的一个重要机理。
其他文献
To construct a recombinant plasmid Pet23a-M, the gene encoding severe acute respiratory syndrome (SARS) coronavirus membrane protein was amplified by RT-PCR and
The transmural heterogeneous changes of transient outward potassium currents (Ito) in rabbit hypertrophic cardiaomyocytes and the effects of long-term prophylac
Accumulating evidence has demonstrated that regulatory T (Treg) cells play an important role in the maintenance of immunologic self-tolerance and in down-regula
To investigate the expression and distribution of S-100 protein and CD83 in the thyroid tissues of autoimmune thyroid diseases (ATDs), and to study the role of
In order to provide a rational research basis for clinical detection and genetic engineering vaccine, plasmid pET-28a (+) encoding both Porin gene PIA and PIB o
The effects of suppression of CD44 by CD44-specific antisense oligonucleotide on attachment of human trabecular meshwork cells to hyaluronic acid (HA) were obse
Mammalian fertilization is a highly regulated process, much of which are not clearly understood. Here we present some information in order to elaborate a workin
INTRODUCTIONThe T-cell dependent specific liver injury in mice induced by concanavalin A(ConA) is a newly cstablished experimental liver injury model,which is c
Infection complicating pancreatic necrosis leads topersisting sepsis,multiple organ dysfunction syndromeand accounts for about half the deaths that occur follo
目的了解北京地区1990-1991和1997-1998两个非连续的流行年中呼吸道合胞病毒(RSV)A、B亚型 和基因型的流行情况。方法用间接免疫荧光法(IIF)检测呼吸道合胞病毒阳性鼻咽分泌