实用肝脏病杂志 ›› 2010, Vol. 13 ›› Issue (1): 16-18.

• 论著 • 上一篇    下一篇

三种检测乙型肝炎病毒YMDD自然变异方法的比较

闵晓春, 赵书民, 杨德刚   

  1. 201800上海市嘉定区中心医院感染病科(闵晓春); 上海第二军医大学附属长征医院感染病科(赵书民,杨德刚)
  • 收稿日期:2009-08-13 出版日期:2010-02-10 发布日期:2016-04-18
  • 作者简介:闵晓春 男,32岁,医学硕士。主要从事病毒性肝炎诊断及治疗的研究。E-mail:zqmxcaexshq@126.com

The comparison of three assays on the spontaneous YMDD mutation in Hepatitis B Virus

MIN Xiao- chun, ZHAO Shumin, YANG Degang   

  1. Department of Infectious Disease,Jiading District Central Hospital,Shanghai 201800,China
  • Received:2009-08-13 Online:2010-02-10 Published:2016-04-18

摘要: 目的 筛选一种特异性及灵敏性较高的检测乙型肝炎病毒YMDD自然变异的方法。方法 通过分子克隆的方法,构建YMDD、YVDD及YIDD三种质粒;通过检测不同比例混合的质粒,比较PCR产物直接测序法、单探针特异性荧光PCR技术及引物特异性荧光PCR技术三种检测方法。结果 经酶切鉴定及直接测序鉴定,显示三种质粒构建成功;当待测模板占总模板的比例大于20%时,直接测序法才能准确检测;当突变株占总毒株的比例占50/51时,单探针特异性荧光PCR法才能判定该样品为YMDD变异型;当突变株占总毒株的比例高于1/11时,引物特异性荧光PCR技术非特异结合的影响可忽略,具有很好的特异性,同时具有较高的灵敏性,检测突变株占总毒株的最低比例可达到1/11。结论 引物特异性荧光PCR技术特异性及灵敏性较高,适合用于乙型肝炎病毒 YMDD自然突变株的检测。

关键词: 乙型肝炎病毒, YMDD自然变异, PCR

Abstract: Objective To sieve a assay of higher specificity and sensitivity on the spontaneous YMDD mutation in hepatitis B virus. Method Plasmids of YMDD,YVDD,YIDD were constructed with molecular methods. The sensitivity and specificity of the three assays (direct sequencing of PCR products,single probe-specific fluorescent PCR and primer-specific fluorescent PCR)were compared by detecting coexisting strains. Result Plasmids of YMDD,YVDD,YIDD which were constructed successfully were identified by restriction enzyme methods and direct sequence analysis. In mixed plasmids,a certain plasmid can be detected by direct sequencing if it covers more than 20% of the total plasmids. YMDD mutant strains only can be tested by single probe-specific fluorescent PCR when the proportion of the total strains is 50/51. The method of primer-specific fluorescent PCR has higher specificity and sensitivity when mutant strains account for more than 1/11 of the total strains. Conclusions This method of primer-specific real-time PCR is fit for the detection of the spontaneous HBV YMDD mutation.

Key words: Hepatitis B virus, YMDD spontaneous mutation, PCR