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  • Title: Immunogenicity of IMS 1113 plus soluble subunit and chimeric proteins containing Mycoplasma hyopneumoniae P97 C-terminal repeat regions.
    Author: Barate AK, Cho Y, Truong QL, Hahn TW.
    Journal: FEMS Microbiol Lett; 2014 Mar; 352(2):213-20. PubMed ID: 24461070.
    Abstract:
    The surface adhesin P97 mediates the adherence of Mycoplasma hyopneumoniae to swine cilia. Two reiterated repeats R1 and R2 are located at the C-terminus of P97. The purpose of this study was to evaluate the immunogenicity of Montanide adjuvant IMS 1113 plus soluble subunit proteins rR1, rR1R2 and their chimeric forms coupled with B subunit of the heat-labile enterotoxin of Escherichia coli (LTB). Each recombinant protein in this study was capable of eliciting anti-R1 specific humoral antibodies (IgG), mucosal antibodies (IgG and IgA) and IFN-γ production. The chimeric protein rLTBR1R2 elicited the quickest humoral antibody response among the recombinant proteins. Serum and bronchoalveolar lavage analysis revealed that each recombinant protein was capable of inducing both Th1 and Th2 responses. Importantly, all of the proteins induced an anti-R1-specific Th2-biased response in both humoral and mucosal compartments, similar to the response observed in a natural infection or vaccination process. These observations indicate that rR1, rR1R2, rLTBR1 and rLTBR1R2 with IMS 1113 might represent a promising subunit vaccine strategy against porcine enzootic pneumonia in pigs.
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