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KMID : 0545120080180030591
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Journal of Microbiology and Biotechnology
2008 Volume.18 No. 3 p.591 ~ p.599
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Protective Immunity Induced by Systemic and Mucosal Delivery of DNA Vaccine Expressing Glycoprotein B of Pseudorabies Virus
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Yoon Hyun-A
Han Young-Woo
Abi George Aleyas
Junu Abi George
Kim Seon-Ju
Kim Hye-Kyung
Song Hee-Jong
Cho Jeong-Gon
Eo Seong-Kug
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Abstract
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A murine model immunized by systemic and mucosal delivery of plasmid DNA vaccine expressing glycoprotein B (pCIgB) of pseudorabies virus (PrV) was used to evaluate both the nature of the induced immunity and protection against a virulent virus. With regard to systemic delivery, the intramuscular (i.m.) immunization with pCIgB induced strong PrV-specific IgG responses in serum but was inefficient in generating a mucosal IgA response. Mucosal delivery through intranasal (i.n.) immunization of pCIgB induced both systemic and mucosal immunity at the distal mucosal site. However, the levels of systemic immunity induced by i.n. immunization were less than those induced by i.m. immunization. Moreover, i.n. genetic transfer of pCIgB appeared to induce Th2-biased immunity compared with systemic delivery, as judged by the ratio of PrV-specific IgG isotypes and Th1- and Th2-type cytokines produced by stimulated T cells. Moreover, the immunity induced by i.n. immunization did not provide effective protection against i.n. challenge of a virulent PrV strain, whereas i.m. immunization produced resistance to viral infection. Therefore, although i.n. immunization was a useful route for inducing mucosal immunity at the virus entry site, i.n. immunization did not provide effective protection against the lethal infection of PrV.
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KEYWORD
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Pseudorabies virus, DNA vaccine, systemic delivery, mucosal delivery, protective immunity
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