Adenoviral vector encoding the whole humanized antibody gene of preS_2 antigen inhibiting the recurrence of hepatitis B virus after liver transplantation
- VernacularTitle:腺病毒携带人乙型肝炎病毒表面前S_2抗体基因转染大鼠移植肝预防乙型肝炎病毒再感染
- Author:
Minggao GUO
;
Jiamei YANG
;
Yunfeng SHAN
- Publication Type:Journal Article
- Keywords:
Liver transplantation;
Hepatitis B;
Adenoviridae;
Antibodies;
Genes
- From:
Chinese Journal of Organ Transplantation
2003;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the adenoviral vector encoding the whole humanized antibody gene of pres_2 antigen for preventing the liver graft from infection by the hepatitis B virus. Methods The whole humanized antibody gene to pres_2 antigen was cloned into type 5 adenoviral shuttle plasmid pDC315. The corresponding recombinant virus was obtained by homologous recombination in 293 packaging cells. The virus containing the whole humanized antibody gene of preS_2 antigen was transfected into the rat liver graft during cold preservation. The effect of the recipient serum containing preS_2 antibody protecting human hepatocytes from hepatitis B virus infection was observed. Results The viral titer determined by TCID50 analysis was 5.1 ?10 10 PFU/ml. The concentration of preS_2 antibody was ( 16.7 ? 10.5 ) mg/L on the day 3 and ( 30.9 ? 13.6 ) mg/L on the day 7. The serum containing preS_2 antibody could protect human hepatocytes from hepatitis B virus infection in vitro when the concentration of the preS_2 antibody was more than 0.5 ?g/ml. Conclusions The adenoviral vector encoding the whole humanized antibody gene of preS_2 protein were constructed successfully. The whole humanized antibody was expressed. The preS_2 antibody in recipient serum protecting human hepatocytes from hepatitis B virus infection was observed, which might be a new method to prevent hepatitis B re-infection after liver transplantation.
