Mucosal Immunization with a Genetically Engineered Pertussis Toxin S1 Fragment-Cholera Toxin Subunit B Chimeric Protein

AUTOR(ES)

Lee, Song F.

FONTE

American Society for Microbiology

RESUMO

A chimeric protein consisting of a divalent pertussis toxin (PT) S1 fragment linked to the cholera toxin (Ctx) A2B fragment was constructed. The chimera induced a mucosal immunoglobulin A (IgA) and a serum IgG immune response to PT and CtxB in BALB/c mice following intranasal immunization. The immune sera neutralized PT in vitro. In the mouse model of Bordetella pertussis respiratory infection, the chimera-immunized animals showed a significant reduction in bacterial lung counts (P = 0.01) from that of the sham control group. Thus, a divalent S1 fragment CtxA2B chimera is an immunogenic antigen and can elicit a protective immunity.

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