Modulation of Immune Response Induced by Co-Administration of DNA Vaccine Encoding HBV Surface Antigen and HCV Envelope Antigen in BALB/c Mice

  • Nam, Sang-Hyun (Department of Pharmacology, National Institute of Toxicological Research, KFDA) ;
  • Park, Jae-Hyun (Department of Pharmacology, National Institute of Toxicological Research, KFDA) ;
  • Kang, Ju-Hye (Biologics Evaluation Department, KFDA) ;
  • Kang, Seog-Youn (Biologics Evaluation Department, KFDA) ;
  • Kim, Jae-Hong (Inflammatory Signaling Laboratory, Graduate School of Biotechnology, Korea University) ;
  • Kim, So-Young (Department of Pharmacology, National Institute of Toxicological Research, KFDA) ;
  • Ahn, Joon-Ik (Department of Pharmacology, National Institute of Toxicological Research, KFDA) ;
  • Park, Ki-Sook (Department of Pharmacology, National Institute of Toxicological Research, KFDA) ;
  • Chung, Hye-Joo (Department of Pharmacology, National Institute of Toxicological Research, KFDA)
  • Published : 2006.11.30

Abstract

Plasmid DNA vaccines encoding the hepatitis B virus (HBV) surface and hepatitis C virus (HCV) envelope antigens, respectively, were constructed, and attempt were made to find the possibility of a divalent vaccine against HBV and HCV. The expression of each plasmid in Cos-1 cells was confirmed using immunocytochemistry. To measure the induced immune response by these plasmids in vivo, female BALB/c mice were immunized intramuscularly with $100\;{\mu}g$ of either both or just one of the plasmids. Anti-HBV and HCV-specific antibodies and related cytokines were evaluated to investigate the generation of both humoral and cellular immune responses. As a result, specific anti-HBV and anti-HCV serum antibodies from mice immunized with these plasmids were observed using immunoblot. The levels of IL-2 and RANTES showing a $Th_{1}$ immune response were significantly increased, but there was no change in the level of IL-4 ($Th_{1}$ immune response) in any of the immunized groups. Compared with each plasmid DNA vaccine, the combined vaccine elicited similar immune responses in both humoral and cell-mediated immunities. These results suggest that the combined DNA vaccine can induce not only comparable immunity experimentally without antigenic interference, but also humoral and $Th_{1}$ dominant cellular immune responses. Therefore, they could serve as candidates for a simultaneous bivalent vaccine against HBV and HCV infections.

Keywords

References

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