Vaccination with an Ovalbumin/Interleukin-4 Fusion DNA Efficiently Induces Th2 Cell-Mediated Immune Responses in an Ovalbumin-Specific Manner

  • Lim, Young-Shin (College of Pharmacy, Chonnam National University) ;
  • Kang, Bok-Yun (College of Pharmacy, Chonnam National University) ;
  • Kim, Eui-Jin (College of Pharmacy, Chonnam National University) ;
  • Kim, Seung-Hyun (College of Pharmacy, Chonnam National University) ;
  • Hwang, Seung-Yong (Department of biochemistry and Molecular Biology, Hanyang University) ;
  • Kim, Kyeong-Man (College of Pharmacy, chonnam National University) ;
  • Kim, Tae-Sung (College of Pharmacy, Institute of Biotechnology, Chonnam National University)
  • Published : 1998.10.01

Abstract

to more effectively drive immune responses toward antigen-specific T helper type 2 (Th2) cell-mediated responses, we constructed a mammalian expression vetor (oPVA/IL4) carrying a fused gene in which the ovalbumin (OVA) cDNA was covalently linked to murine interleukin-4 (IL-4) cDNA. A biologically active OVA/IL4 DNA, as demonstrated by Wes tern blotting and cytokine bioassay. In tramuscular injection of BALB/c mice with the pOVA/IL4 DNA increased both the production of OVA-specific IL-4 by CD$4^{+}$ T cells and the ratio of anti-OVA lgG1 to anti-OVA lgG2a isotypes, while the injection with the pOVA DNA alone, or with the mixture of the pOVA and pIL4 DNA did no or little increase. furthermore, the OVA-specific, Th2 cell-mediated immune responses were significantly enhanced by multiple injections with the pOVA/IL4 DNA. These studies indicate that the direct linkage of an OVA gene to an IL-4 gene in the expression plasmid confines the effects of IL-4 to the OVA-specific cells, efficiently driving the immune response toward OVA-specific, Th2 cell-mediated responses.

Keywords

References

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