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乙型肝炎病毒C启动子区C1673T/C1799G联合突变的意义

Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology(2012)

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Abstract
目的 探讨HBV(乙型肝炎病毒)C启动子区(CP) C1673T/C1799G联合变异的生物学和临床意义.方法 136名慢性HBV感染者,包括无症状携带者(ASC) 25例,慢性乙型肝炎(CHB)38例,慢性重型乙型肝炎(CSHB) 24例,乙肝肝硬化(LC) 36例,肝细胞肝癌(HCC)13例,用半巢氏PCR的方法结合直接测序法检测HBV基因亚型及CP区变异,分析C1673T/C1799G联合变异在不同基因亚型中的发生率及与HBV复制、e抗原表达和不同慢性HBV感染疾病谱的关系.结果 本组病例中,Ba亚型110例,Bj亚型1例,C1亚型7例,C2亚型8例,C1673T/C1799G联合变异发生率为80.9%,其中在Ba亚型中为96.4%,C1亚型为14.3%,C2亚型为12.5%,Ba亚型与C1和C2亚型比较,差异有统计学意义(P <0.0001).变异组HBV DNA载量与非变异组比较差异无统计学意义(P>0.05);e抗原阳性组变异率为71.4%,e抗原阴性组为87.5%,两组比较差异有统计学意义(P<0.05).从ASC、CHB、CSHB、LC到HCC组,变异的发生率差异无统计学意义(P>0.05).结论 C1673T/C17991G联合变异常见于Ba基因亚型,该变异不影响HBV DNA的复制水平,可能与不同慢性HBV感染疾病谱无关.
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Key words
Hepatitis B virus,Genotype,Mutations,Polymerase chain reactioin,Promoter regions (Genetics)
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