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乙型肝炎病毒DNA聚合酶N末端蛋白基因芯片研究

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摘要 目的:检测乙型肝炎病毒(HBV)DNA聚合酶N末端蛋白(TP) 的表达对肝母细胞瘤细胞HepG2基因表达谱的影响,进一步阐明TP在乙型肝炎陧性化及致肝细胞癌发生发展过程中的分子生物学机制. 方法:根据AF384372 HBVDNA病毒株序列设计、合成HBV DNA P-TP基因序列特异性的引物,以含有AF384372HBVDNA P全基因组cDNA的质粒G318A7作为模板,应用聚合酶链反应(PCR)技术扩增TP蛋白编码基因片段,以常规的分子生物学技术将获得的HBV DNA-TP 编码基因片段克隆到TA载体中进行核苷酸序列的测定, 构建真核表达载体pcDNA3.1(-)-TP.以脂质体转染肝母细胞瘤细胞系HepG2,提取mRNA,逆转录为cDNA,与转染空白表达载体pcDNA3.1(-)的HepG2细胞进行DNA芯片分析. 结果:构建的表达载体经过限制性内切酶分析和DNA序列测定,证实准确无误.以单链可变区抗体的Western blot杂交技术证实构建的表达载体转染HepG2细胞之后有TP蛋白的表达,提取高质量的mRNA并进行逆转录成为cDNA,进行DNA 芯片技术分析.在1 152个基因表达谱的筛选中,发现有111 个基因表达水平显著上调,88个基因表达水平显著下调. 结论:应用基因表达谱芯片成功筛选了HBV DNA P-TP转染细胞后差异表达基因,为进一步阐明TP蛋白致病的分子生物学机制提供依据.
出处 《世界华人消化杂志》 CAS 2004年第12期2911-2915,共5页 World Chinese Journal of Digestology
基金 国家自然科学基金攻关项目 No.C03011402 No C30070689军队"九 五"科技攻关项目 No 98D063军队回国留学人员启动基金项目 No.98H038军队"十 五"科技攻关青年基金项目 No 01Q138军队"十 五"科技攻关面上项目 No.01MB135
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参考文献38

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二级参考文献48

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