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Van Braeckel-Budimir N, Gras S, Ladell K, Josephs TM, Pewe L, Urban SL, Miners KL, Farenc C, Price DA, Rossjohn J, Harty JT. A T Cell Receptor Locus Harbors a Malaria-Specific Immune Response Gene. Immunity 2017; 47:835-847.e4. [PMID: 29150238 DOI: 10.1016/j.immuni.2017.10.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/02/2017] [Accepted: 10/26/2017] [Indexed: 01/05/2023]
Abstract
Immune response (Ir) genes, originally proposed by Baruj Benacerraf to explain differential antigen-specific responses in animal models, have become synonymous with the major histocompatibility complex (MHC). We discovered a non-MHC-linked Ir gene in a T cell receptor (TCR) locus that was required for CD8+ T cell responses to the Plasmodium berghei GAP5040-48 epitope in mice expressing the MHC class I allele H-2Db. GAP5040-48-specific CD8+ T cell responses emerged from a very large pool of naive Vβ8.1+ precursors, which dictated susceptibility to cerebral malaria and conferred protection against recombinant Listeria monocytogenes infection. Structural analysis of a prototypical Vβ8.1+ TCR-H-2Db-GAP5040-48 ternary complex revealed that germline-encoded complementarity-determining region 1β residues present exclusively in the Vβ8.1 segment mediated essential interactions with the GAP5040-48 peptide. Collectively, these findings demonstrated that Vβ8.1 functioned as an Ir gene that was indispensable for immune reactivity against the malaria GAP5040-48 epitope.
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Affiliation(s)
| | - Stephanie Gras
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia; Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Kristin Ladell
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XN, UK
| | - Tracy M Josephs
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia; Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Lecia Pewe
- Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA
| | - Stina L Urban
- Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA
| | - Kelly L Miners
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XN, UK
| | - Carine Farenc
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - David A Price
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XN, UK; Human Immunology Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA.
| | - Jamie Rossjohn
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia; Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XN, UK.
| | - John T Harty
- Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA; Department of Pathology, University of Iowa, Iowa City, IA 52242, USA; Interdisciplinary Program in Immunology, University of Iowa, Iowa City, IA 52242, USA.
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Smeraldi E, Scorza Smeraldi R, Cazzullo CL, Guareschi Cazzullo A, Fabio G, Canger R. Immunogenetics of the Lennox-Gastaut syndrome: frequency of HL-A antigens and haplotypes in patients and first-degree relatives. Epilepsia 1975; 16:699-703. [PMID: 1222746 DOI: 10.1111/j.1528-1157.1975.tb04754.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Twenty-two patients with the Lennox-Gastaut syndrome and their families were examined for HL-A antigens by the microlymphocytotoxicity test. The antigen HL-A7 belonging to the HL-A locus showed a significantly increased frequency (p less than 0.0005) both in parents and in patients. The same antigen showed a significantly altered segregation in patients but a normal one in healthy siblings. Another antigen of the second HL-A locus, HL-A12, did not display a normal segregation in our patients, in whom it was nearly not represented.
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