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Lookup NU author(s): Dr Helen Harper,
Dr Alexei von Delwig,
Professor John Robinson
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We mapped mouse CD4 T-cell epitopes located in three structurally distinct regions of the V antigen of Yersinia pestis. T-cell hybridomas specific for epitopes from each region were generated to study the mechanisms of processing and presentation of V antigen by bone-marrow-derived macrophages. All three epitopes required uptake and/or processing from V antigen as well as presentation to T cells by newly synthesized major histocompatibility complex (MHC) class II molecules over a time period of 3-4 hr. Sensitivity to inhibitors showed a dependence on low pH and cysteine, serine and metalloproteinase, but not aspartic proteinase, activity. The data indicate that immunodominant epitopes from all three structural regions of V antigen were presented preferentially by the classical MHC class II-restricted presentation pathway. The requirement for processing by the co-ordinated activity of several enzyme families is consistent with the buried location of the epitopes in each region of V antigen. Understanding the structure-function relationship of multiple immunodominant epitopes of candidate subunit vaccines is necessary to inform choice of adjuvants for vaccine delivery. In the case of V antigen, adjuvants designed to target it to lysosomes are likely to induce optimal responses to multiple protective T-cell epitopes. © 2006 Blackwell Publishing Ltd.
Author(s): Shim H-K, Musson JA, Harper HM, McNeill HV, Walker N, Flick-Smith H, Von Delwig A, Williamson ED, Robinson JH
Publication type: Article
Publication status: Published
Print publication date: 01/11/2006
ISSN (print): 0019-2805
ISSN (electronic): 1365-2567
Publisher: Wiley-Blackwell Publishing Ltd.
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