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乙型肝炎病毒YMDD的检测与分析 被引量:3

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摘要 乙型肝炎(简称乙肝)乙肝病毒是一种DNA病毒,主要用拉米夫定治疗.其主要机制是拉米夫定在细胞内经磷酸化后生成三磷酸拉米夫定.与脱氧胞嘧啶核苷(dCTP)竞争.进入合成中的脱氧核糖核酸链,使乙肝病毒不能继续延伸而终止复制。乙肝病毒YMDD变异主要与拉米夫定治疗有关.其产生机制是乙肝病毒在拉米夫定药物诱导下发生DNA聚合酶基因变异,使氮基酸空间结构发生改变,拉米夫定无法与之结合.丧失了抗病毒活性,从而在治疗过程中产生耐药性。因此采用荧光定量多聚酶链反应(PCR)方法对拉米夫定产生YMDD耐药的情况进行探讨。
作者 许茵
出处 《现代医药卫生》 2009年第10期1557-1558,共2页 Journal of Modern Medicine & Health
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