Latent membrane protein 1 （LMP1）, an important protein encoded by Epstein Barr virus （EBV）, has been implied to link with the pathogenesis of nasopharyngeal carcinoma （NPC）. Its dual effects of increasing cell p...Latent membrane protein 1 （LMP1）, an important protein encoded by Epstein Barr virus （EBV）, has been implied to link with the pathogenesis of nasopharyngeal carcinoma （NPC）. Its dual effects of increasing cell proliferation and inhibiting cell apoptosis have been confirmed. In this study, we showed that the expression of Survivin and CDK4 protein in CNE-LMP1, a LMP1 positive NPC epithelial cell line, is higher than in LMP1 negative NPC epithelial cell line- CNE1, and the expression is LMP1 dosage-dependent. Although it was reported that Survivin specifically expressed in cell cycle G2/M phase, our studies suggested that LMP1 could promote the expression of Survivin in G0/G1, S and G2/ M phase. It also showed that Survivin and CDK4 could be accumulated more in the nuclei triggered by LMP1. More interestingly, Survivin and CDK4 could form a protein complex in the nuclei of CNE-LMP1 rather than in that of CNE1, which demonstrated that the interaction between these two proteins could be promoted by LMPI. These results strongly suggested that the role of LMP1 in the regulation of Survivin and CDK4 may also shed some light on the mechanism research of LMP1 in NPC.展开更多
凋亡抑制蛋白（the inhibitor of apoptosis protein,IAP）家族有8位成员,包括X染色体连锁的凋亡抑制剂（X-linked inhibitor of apoptosis,XIAP）,cIAP1,cIAP2,NLR家族（NAIP）,livin,IAP相似蛋白2（ILP2）,BRUCE和survivin。Survivin...凋亡抑制蛋白（the inhibitor of apoptosis protein,IAP）家族有8位成员,包括X染色体连锁的凋亡抑制剂（X-linked inhibitor of apoptosis,XIAP）,cIAP1,cIAP2,NLR家族（NAIP）,livin,IAP相似蛋白2（ILP2）,BRUCE和survivin。Survivin是IAP家族中抗凋亡作用最强的成员,于1997年首次被发现。Survivin在正常组织、癌前组织、各种癌症中的表达率均不同,即survivin表达具有特异性,因此,它在肿瘤诊断、预后判断等方面成为核心。展开更多
基金National Nature Science Foundation for Distinguished Young Scholar of China (No.39525022)National Basic Research Program(No.2004CB518703) National Nature Science Foundation of China (No.30570085).
文摘Latent membrane protein 1 （LMP1）, an important protein encoded by Epstein Barr virus （EBV）, has been implied to link with the pathogenesis of nasopharyngeal carcinoma （NPC）. Its dual effects of increasing cell proliferation and inhibiting cell apoptosis have been confirmed. In this study, we showed that the expression of Survivin and CDK4 protein in CNE-LMP1, a LMP1 positive NPC epithelial cell line, is higher than in LMP1 negative NPC epithelial cell line- CNE1, and the expression is LMP1 dosage-dependent. Although it was reported that Survivin specifically expressed in cell cycle G2/M phase, our studies suggested that LMP1 could promote the expression of Survivin in G0/G1, S and G2/ M phase. It also showed that Survivin and CDK4 could be accumulated more in the nuclei triggered by LMP1. More interestingly, Survivin and CDK4 could form a protein complex in the nuclei of CNE-LMP1 rather than in that of CNE1, which demonstrated that the interaction between these two proteins could be promoted by LMPI. These results strongly suggested that the role of LMP1 in the regulation of Survivin and CDK4 may also shed some light on the mechanism research of LMP1 in NPC.
文摘凋亡抑制蛋白（the inhibitor of apoptosis protein,IAP）家族有8位成员,包括X染色体连锁的凋亡抑制剂（X-linked inhibitor of apoptosis,XIAP）,cIAP1,cIAP2,NLR家族（NAIP）,livin,IAP相似蛋白2（ILP2）,BRUCE和survivin。Survivin是IAP家族中抗凋亡作用最强的成员,于1997年首次被发现。Survivin在正常组织、癌前组织、各种癌症中的表达率均不同,即survivin表达具有特异性,因此,它在肿瘤诊断、预后判断等方面成为核心。
