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Marshall JL, Flores-Langarica A, Kingsley RA, Hitchcock JR, Ross EA, Lopez-Macias C, Lakey J, Martin LB, Toellner KM, MacLennan CA, MacLennan IC, Henderson IR, Dougan G, Cunningham AF. The capsular polysaccharide Vi from Salmonella typhi is a B1b antigen. J Immunol 2012; 189:5527-32. [PMID: 23162127 PMCID: PMC3605773 DOI: 10.4049/jimmunol.1103166] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Vaccination with purified capsular polysaccharide Vi Ag from Salmonella typhi can protect against typhoid fever, although the mechanism for its efficacy is not clearly established. In this study, we have characterized the B cell response to this vaccine in wild-type and T cell-deficient mice. We show that immunization with typhoid Vi polysaccharide vaccine rapidly induces proliferation in B1b peritoneal cells, but not in B1a cells or marginal zone B cells. This induction of B1b proliferation is concomitant with the detection of splenic Vi-specific Ab-secreting cells and protective Ab in Rag1-deficient B1b cell chimeras generated by adoptive transfer-induced specific Ab after Vi immunization. Furthermore, Ab derived from peritoneal B cells is sufficient to confer protection against Salmonella that express Vi Ag. Expression of Vi by Salmonella during infection did not inhibit the development of early Ab responses to non-Vi Ags. Despite this, the protection conferred by immunization of mice with porin proteins from Salmonella, which induce Ab-mediated protection, was reduced postinfection with Vi-expressing Salmonella, although protection was not totally abrogated. This work therefore suggests that, in mice, B1b cells contribute to the protection induced by Vi Ag, and targeting non-Vi Ags as subunit vaccines may offer an attractive strategy to augment current Vi-based vaccine strategies.
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Affiliation(s)
- Jennifer L. Marshall
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection and Institute for Biomedical Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Adriana Flores-Langarica
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection and Institute for Biomedical Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Robert A. Kingsley
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SA, UK
| | - Jessica R. Hitchcock
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection and Institute for Biomedical Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Ewan A. Ross
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection and Institute for Biomedical Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Constantino Lopez-Macias
- Medical Research Unit on Immunochemistry, Specialties Hospital, National Medical Centre “Siglo XXI” Mexican Institute for Social Security (IMSS), Mexico City, Mexico
| | - Jeremy Lakey
- Institute for Cell and Molecular Biosciences, University of Newcastle, Newcastle upon Tyne, NE2 4HH, UK
| | - Laura B. Martin
- Novartis Vaccines Institute for Global Health, Via Fiorentina 1, 53100 Siena, Italy
| | - Kai-Michael Toellner
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection and Institute for Biomedical Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Calman A. MacLennan
- Novartis Vaccines Institute for Global Health, Via Fiorentina 1, 53100 Siena, Italy
| | - Ian C MacLennan
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection and Institute for Biomedical Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Ian R. Henderson
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection and Institute for Biomedical Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Gordon Dougan
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SA, UK
| | - Adam F. Cunningham
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection and Institute for Biomedical Research, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
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