检验医学 ›› 2012, Vol. 27 ›› Issue (11): 921-924.

• 分子生物学检验论著 • 上一篇    下一篇

乙型肝炎病毒X基因真核表达载体的构建

李晓斐   

  1. 青岛市传染病医院检验科 山东 青岛 266033
  • 收稿日期:2012-09-18 修回日期:2012-08-02 出版日期:2012-11-30 发布日期:2012-11-14
  • 作者简介:李晓斐,男,1957年生,学士,副主任技师,主要从事分子生物学研究。

Establishment of hepatitis B virus X gene eukaryotic expression vector

  1. Department of Clinical Laboratory,Qingdao Infection Diseases Hospital,Shandong Qingdao 266033,China
  • Received:2012-09-18 Revised:2012-08-02 Online:2012-11-30 Published:2012-11-14

摘要: 目的 构建含有乙型肝炎病毒(HBV)X基因的真核表达载体,并对其表达进行鉴定。方法 用聚合酶链反应(PCR)方法扩增X基因序列,对pcDNA6(+)载体及X基因PCR产物双酶切并转化大肠杆菌DH5α,筛选阳性克隆,并对其进行双酶切和测序鉴定,构建HBV X基因真核表达载体pcDNA6(+)-HBx。以多聚乙烯酰胺(PEI)法将其转染到HepG2细胞,Western Blot鉴定目的蛋白。结果 pcDNA6-HBx酶切后,琼脂糖电泳可见到HBx基因片段,经序列测定其含有完整的X基因片段;Western Blot结果显示pcDNA6(+)-HBx能在HepG2细胞中表达X蛋白。结论 成功构建了真核表达载体pcDNA6(+)-HBx,并能在HepG2细胞中表达X蛋白,为进一步研究HBV X基因与慢性乙型肝炎及肝癌的关系提供便利条件。

关键词: 乙型肝炎病毒, X基因, 真核表达

Abstract: Objective To establish hepatitis B virus(HBV)X gene eukaryotic expression vector and identify its expression. Methods Polymerase chain reaction(PCR)was used to amplify X gene sequence,and the pcDNA6(+)vector and X gene PCR product double enzyme digestion transformed into Escherichia coli DH5 alpha.The positive clones were screened,and the double enzyme digestion and DNA sequencing were used to establish HBV X gene eukaryotic expression vector pcDNA6(+)-HBx.By polyetherimide(PEI)method,the transformation into HepG2 cells was performed,and Western blot identification of target protein was carried out. Results After pcDNA6-HBx enzyme digestion,agarose gel electrophoresis found HBx gene fragment,and sequencing results showed containing the complete X gene fragment.Western blot results showed that the pcDNA6(+)-HBx in HepG2 cells expressed X protein. Conclusions The eukaryotic expression vector pcDNA6(+)-HBx is established successfully,and there is X protein expression in HepG2 cells. It provides convenience for the further study of HBV X gene with chronic hepatitis and hepatocellular carcinoma.

Key words: Hepatitis B virus, X gene, Eukaryotic expression