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96例急性乙型肝炎患者HBV多聚酶区的耐药变异分析

, PP. 639-641

Keywords: 肝炎病毒,乙型,拉米夫定,恩替卡韦,药物耐受性,突变

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Abstract:

目的?检测未接受过核苷(酸)类似物(NA)治疗的急性乙型肝炎患者感染的HBV是否存在耐药变异。方法??收集96?例急性乙型肝炎患者住院早期血清,提取HBVDNA,采用巢式PCR方法扩增HBV反转录酶(RT)全基因,对PCR产物进行DNA双?向测序,对RT/S基因序列进行分子进化树分析反基因分型,对rt80、rt173、rt180、rt181、rt184、rt202、rt204、rt236和rt250等位点上的耐?药相关变异进行分析,并用克隆测序法进行验证,每个样本测定10~20个克隆。结果??用直接测序法检出NA耐药变异8例?(8.3%),C型6例,B型2例。其中6例为拉米夫定(LAM)耐药变异,包括4例rtM204I、1例rtL80I+rtM204I和1例rtL180M+?rtM204I;另2例检出与阿德福韦酯(ADV)耐药相关的rtA181V变异。变异株多数与野生型病毒株共存。克隆测序法的结果与直接?测序法的结果大体相符,部分样本中有2种或多种耐药变异株共存,其中1例患者的样本中除LAM变异株外,还检出了ADV和恩?替卡韦(ETV)耐药变异株,变异形式分别为rtA181T+rtN236T和rtL180M+rtS202G+rtM204V。结论??未接受过NA治疗的急性?乙型肝炎患者可以感染NA耐药株病毒,NA耐药病毒可以在人群中传播引起急性乙型肝炎,变异病毒的传播致病不只局限于LAM?耐药株。

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