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Young MH, U’Ren L, Huang S, Mallevaey T, Scott-Browne J, Crawford F, Lantz O, Hansen TH, Kappler J, Marrack P, Gapin L. MAIT cell recognition of MR1 on bacterially infected and uninfected cells. PLoS One 2013; 8:e53789. [PMID: 23342002 PMCID: PMC3544856 DOI: 10.1371/journal.pone.0053789] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 12/04/2012] [Indexed: 11/25/2022] Open
Abstract
Mucosal-associated invariant T cells are a unique population of T cells that express a semi-invariant αβ TCR and are restricted by the MHC class I-related molecule MR1. MAIT cells recognize uncharacterized ligand(s) presented by MR1 through the cognate interaction between their TCR and MR1. To understand how the MAIT TCR recognizes MR1 at the surface of APCs cultured both with and without bacteria, we undertook extensive mutational analysis of both the MAIT TCR and MR1 molecule. We found differential contribution of particular amino acids to the MAIT TCR-MR1 interaction based upon the presence of bacteria, supporting the hypothesis that the structure of the MR1 molecules with the microbial-derived ligand(s) differs from the one with the endogenous ligand(s). Furthermore, we demonstrate that microbial-derived ligand(s) is resistant to proteinase K digestion and does not extract with common lipids, suggesting an unexpected class of antigen(s) might be recognized by this unique lymphocyte population.
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Affiliation(s)
- Mary H. Young
- Integrated Department of Immunology, National Jewish Health and University of Colorado School of Medicine, Denver, Colorado, United States of America
| | - Lance U’Ren
- Integrated Department of Immunology, National Jewish Health and University of Colorado School of Medicine, Denver, Colorado, United States of America
| | - Shouxiong Huang
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Thierry Mallevaey
- Integrated Department of Immunology, National Jewish Health and University of Colorado School of Medicine, Denver, Colorado, United States of America
| | - James Scott-Browne
- Integrated Department of Immunology, National Jewish Health and University of Colorado School of Medicine, Denver, Colorado, United States of America
| | - Frances Crawford
- Integrated Department of Immunology, National Jewish Health and University of Colorado School of Medicine, Denver, Colorado, United States of America
| | | | - Ted H. Hansen
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - John Kappler
- Integrated Department of Immunology, National Jewish Health and University of Colorado School of Medicine, Denver, Colorado, United States of America
- Howard Hughes Medical Institute, University of Colorado School of Medicine, Aurora, Colorado, United States of America
- Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado, United States of America
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, Colorado, United States of America
- Program in Biomolecular Structure, University of Colorado School of Medicine, Aurora, Colorado, United States of America
| | - Philippa Marrack
- Integrated Department of Immunology, National Jewish Health and University of Colorado School of Medicine, Denver, Colorado, United States of America
- Howard Hughes Medical Institute, University of Colorado School of Medicine, Aurora, Colorado, United States of America
- Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado, United States of America
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado, United States of America
- * E-mail: (LG); (PM)
| | - Laurent Gapin
- Integrated Department of Immunology, National Jewish Health and University of Colorado School of Medicine, Denver, Colorado, United States of America
- * E-mail: (LG); (PM)
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A double-edged sword: the role of NKT cells in malaria and HIV infection and immunity. Semin Immunol 2009; 22:87-96. [PMID: 19962909 DOI: 10.1016/j.smim.2009.11.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Revised: 11/02/2009] [Accepted: 11/09/2009] [Indexed: 02/08/2023]
Abstract
NKT cells are known to play a role against certain microbial infections, including malaria and HIV, two major global infectious diseases. NKT cells exhibit either protective or pathogenic role against malaria. They are depleted by HIV infection and have a direct pathogenic role against many opportunistic infections common in end-stage AIDS. This review discusses the various features of the interaction between NKT cells and malaria parasites and HIV, and the potential to harness this interaction for therapeutic and vaccine strategies.
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