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EBV阳性淋巴瘤组织中EBNA1基因多态性研究

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摘要 EBV与多种人类肿瘤的发生有关,如伯基特淋巴瘤(Burkitt's lymphoma,BL)、霍奇金病(Hodgkin's disease, HD)、鼻咽癌(nasopharyngeal carcinoma,NPC)以及胃癌等[1]。EBV潜伏感染和细胞转化能力被广泛认为是其致癌的基础,目前已知EBV多种潜伏期基因编码产物可引起细胞转化,其中核抗原家族基因(EBNAs)编码产物中的EBNA1是唯一在所有EBV相关肿瘤中均表达的蛋白,当病毒潜伏感染时,其在基因组的维持、复制和转录过程中发挥重要作用[2]。EBNA1重复序列可通过顺式作用方式抑制抗原递呈细胞对自身的加工处理,使CTL不能识别自身免疫表位从而逃避机体免疫应答[3]。EBNA1由N端(AA 1-89)、甘氨酸和丙氨酸重复序列(AA 90-327)以及C端(AA 328-641)组成,对EBNA1基因变异的分析多集中在C端。Bhatia等[4]和Gutiérrez等[5]根据突变热点AA487的变化及AA466-527之间的变异,将EBNA1基因分为P-ala、P-thr、V-val、V-leu和V-pro 5种亚型。本研究对EBV阳性淋巴瘤组织中EBNA1编码基因多态性进行了检测和分析,旨在探讨EBNA1多态性在EBV阳性淋巴瘤发生中的意义。
出处 《中国癌症杂志》 CAS CSCD 北大核心 2014年第6期476-480,共5页 China Oncology
基金 国家自然科学基金资助(No:NSFC30970157) 山东省自然科学基金项目资助(No:ZR2011CM016)
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