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    Please use this identifier to cite or link to this item: https://ir.fy.edu.tw:8080/ir/handle/987654321/3943


    Title: Screening of protective antigens of Japanese encephalitis virus by DNA immunization: a comparative study with conventional viral vaccines.
    Authors: Chen, Hsin-Wei;Pan, Chien-Hsiung;Liau, M.Y.;Jou,Ruwen;Tsai, Chiao-Jung;Wu, Hsin-Jung;Lin, Yi-Ling;Tao,Mi-Hua
    Contributors: 輔英科技大學 生物科技系
    Date: 1999-12
    Issue Date: 2010-10-08 10:54:44 (UTC+8)
    Abstract: In this study, we evaluated the relative role of the structural and nonstructural proteins of the Japanese encephalitis virus (JEV) in inducing protective immunities and compared the results with those induced by the inactivated JEV vaccine. Several inbred and outbred mouse strains immunized with a plasmid (pE) encoding the JEV envelope protein elicited a high level of protection against a lethal JEV challenge similar to that achieved by the inactivated vaccine, whereas all the other genes tested, including those encoding the capsid protein and the nonstructural proteins NS1-2A, NS3, and NS5, were ineffective. Moreover, plasmid pE delivered by intramuscular or gene gun injections produced much stronger and longer-lasting JEV envelope-specific antibody responses than immunization of mice with the inactivated JEV vaccine did. Interestingly, intramuscular immunization of plasmid pE generated high-avidity antienvelope antibodies predominated by the immunoglobulin G2a (IgG2a) isotype similar to a sublethal live virus immunization, while gene gun DNA immunization and inactivated JEV vaccination produced antienvelope antibodies of significantly lower avidity accompanied by a higher IgG1-to-IgG2a ratio. Taken together, these results demonstrate that the JEV envelope protein represents the most critical antigen in providing protective immunity.
    Relation: Journal of Virology,Vol. 73, No. 12, p. 10137-10145
    Appears in Collections:[生物科技系] 期刊論文

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