Construction of replication-deficient recombinant adenoviral vector carrying HBsAg and HSP70 chimeric gene and its expression in vitro
10.3760/cma.j.issn.1003-9279.2008.02.019
- VernacularTitle:携带HSP70-HBsAg嵌合基因复制缺陷型重组腺病毒的制备
- Author:
Chun-Liang LEI
1
;
Cheng-Hui HUANG
;
Zhan YANG
;
Xiao-Ping TANG
Author Information
1. 广州市第八人民医院
- Keywords:
Adenoviridae;
Hepatitis B virus Hepatitis B core antigens;
Genes,transfection;
Heat shock protein 70
- From:
Chinese Journal of Experimental and Clinical Virology
2008;22(2):136-138
- CountryChina
- Language:Chinese
-
Abstract:
Objective To construct a recombinant adenoviral vector carrying HBcAg-HSP70 chimeric gene by homologous recombination in bacteria and to detect its expression in vitro. Methods Heat shock protein 70 gene from Mycobacterium tuberculosis were amplified by PCR and were cloned to adenoviral shuttle plasmid pAdTrack-CMV-HBsAg. Then the resultant pAdTrack-CMV-HBsAg-HSP70 was eotransfected into BJ5183 bacteria with the plasmid pAdeasy-1. The adenoviral plasmid carrying HBsAg-HSP70 gene (pAd-HBsAg-HSP70) was generated with homologous recombination in bacteria and the adenoviruses were produced in 293 cells. Several kinds of mammal cells (293 cells and Vero cells) were infected with adenoviruses and the expression of HBsAg-HSP70 was detected by RT-PCR and ELISA in vitro. Results The adenoviral plasmids pAd-HBsAg-HSP70 were obtained by selection for kanamycin resistance and confirmed by restriction endonuclease Pac Ⅰ analyses. The recombinant adenoviruses Ad-HBsAg-HSP70 were packaged successfully in 293 cells. The titer of Ad-HBsAg-HSP70 was up to 2 × 1012 pfu/L after the second passage of proliferation in 293 cells. HBsAg and HSP70 were expressed efficiently in mammal cells after infection. Conclusion The recombinant adenoviruses expressing HBsAg and HSP70 were constructed successfully which can be used further in study of gene therapy for HBV.
