实用肝脏病杂志 ›› 2010, Vol. 13 ›› Issue (3): 161-165.doi: 10.3969/j.issn.1672-5069.2010.03.001

• 论著 •    下一篇

表达HBsAg特异性siRNA的重组腺相关病毒载体的构建

胡斌, 杨燕, 刘嘉, 马智勇, 黄红平, 余源, 刘慎沛, 杨东亮   

  1. 430030 武汉市 华中科技大学同济医学院附属同济医院临床免疫研究室(胡斌,刘嘉,马智勇,杨东亮);实验医学研究中心(杨燕,黄红平,余源,刘慎沛)
  • 收稿日期:2010-03-25 出版日期:2010-06-10 发布日期:2016-04-18
  • 通讯作者: 杨燕,E-mail:yyang@tjh.tjmu.edu.cn
  • 作者简介:胡斌 男,28岁,博士研究生
  • 基金资助:
    国家传染病防治科技重大专项(2008ZX10002-011);国家高技术研究发展计划(863)项目(2006AA02Z128);国家自然科学基金(30700701)

Inhibition of HbsAg and HbeAg expression of recombinant adeno-associated virus encoding HBsAg-shRNA in HepG2.215 cells in vitro

HU Bin,YANG Yan,LIU Jia,et al.   

  1. Institute of Clinical Immunology,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China
  • Received:2010-03-25 Online:2010-06-10 Published:2016-04-18

摘要: 目的 构建表达针对HBsAg小发卡RNA(shRNA)的重组腺相关病毒载体,以观察该病毒在体外对HBsAg和HBeAg的抑制作用。方法 将表达针对HBsAg的shRNA定向克隆到pAAV/U6-hrGFP 质粒中,获得重组表达质粒(pAAV-shHBs-hrGFP);采用磷酸钙转染法将该质粒与包装质粒 pAAV-RC 和辅助质粒 pHelper 共同转染AAV 293 细胞,进行rAAV-shHBs-hrGFP 重组病毒包装。收获病毒感染HepG2.215细胞;采用ELISA法检测HBsAg和HBeAg水平。 结果 酶切鉴定、测序结果表明,pAAV-shHBs-hrGFP 载体成功构建。包装收获的rAAV-shHBs-hrGFP病毒液可以感染HepG2.215细胞,并且可以抑制HBsAg和HBeAg的表达。结论 制备的 rAAV-shHBs-hrGFP病毒载体能够抑制HBV 在体外的抗原表达。

关键词: HepG2.215细胞, 腺相关病毒2, RNA干扰, HBsAg

Abstract: Objective To construct the recombinant adeno-associated virus(rAAV)encoding HBsAg-shRNA and to observe its effect on HBsAg and HBeAg expression in HepG2215 cells in vitro. Methods pAAV-shHBs-hrGFP expressing plasmid was constructed by molecular biological techniques. The recombinants were cotransfected with p-RC and p-Helper into AAV-293 cells mediated by calcium acid phosphate. The rAAVs encoding HBsAg-shRNA(rAAV-shHBs-hrGFP)were harvested and infected HepG2215 cells. The silencing effect of this virus on HbsAg and HBeAg gene expression was assessed by ELISA. Results The plasmid of pAAV-shHBs-hrGFP was successfully constructed by identification of restrict enzyme and DNA sequencing. GFP expression was observed about 80% in AAV-293 cells. After cotransfection,the recombinant AAV-shHBs-hrGFP was harvested and the virus titer was tested. The HBsAg and HBeAg expression in HepG2.215 cells was down-regulated markedly after infection of rAAV-shHBs-hrGFP. Conclusion The recombinant AAV-shHBs-hrGFP vector is successfully constructed and can be used as a potential antivirus agent to inhibit HBV replication.

Key words: HepG2215 cells, AAV2, RNAi, HBsAg