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Collin R, Dugas V, Pelletier AN, Chabot-Roy G, Lesage S. Evidence of genetic epistasis in autoimmune diabetes susceptibility revealed by mouse congenic sublines. Immunogenetics 2021; 73:307-319. [PMID: 33755757 DOI: 10.1007/s00251-021-01214-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 03/09/2021] [Indexed: 11/26/2022]
Abstract
Susceptibility to autoimmune diabetes is a complex genetic trait. Linkage analyses exploiting the NOD mouse, which spontaneously develops autoimmune diabetes, have proved to be a useful tool for the characterization of some of these traits. In a linkage analysis using 3A9 TCR transgenic mice on both B10.BR and NOD.H2k backgrounds, we previously determined that both the Idd2 and Idd13 loci were linked to the proportion of immunoregulatory CD4-CD8- double negative (DN) T cells. In addition to Idd2 and Idd13, five other loci showed weak linkage to the proportion of DN T cells. Of interest, in an interim analysis, a locus on chromosome 12 is linked to DN T cell proportion in both the spleen and the lymph nodes. To determine the impact of this locus on DN T cells, we generated two congenic sublines, which we named Chr12P and Chr12D for proximal and distal, respectively. While 3A9 TCR:insHEL NOD.H2k-Chr12D mice were protected from diabetes, 3A9 TCR:insHEL NOD.H2k-Chr12P showed an increase in diabetes incidence. Yet, the proportion of DN T cells was similar to the parental 3A9 TCR NOD.H2k strain for both of these congenic sublines. A genome-wide two dimensional LOD score analysis reveals genetic epistasis between chromosome 12 and the Idd13 locus. Altogether, this study identified further complex genetic interactions in defining the proportion of DN T cells, along with evidence of genetic epistasis within a locus on chromosome 12 influencing autoimmune susceptibility.
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Affiliation(s)
- Roxanne Collin
- Cellular Immunogenetics laboratory, Division of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montreal, Quebec, H1T 2M4, Canada
- Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montreal, Quebec, H3C 3J7, Canada
- CellCarta, 201 President Kennedy Avenue, Suite 3900, Montreal, Quebec, H2X 3Y7, Canada
| | - Véronique Dugas
- Cellular Immunogenetics laboratory, Division of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montreal, Quebec, H1T 2M4, Canada
- Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montreal, Quebec, H3C 3J7, Canada
| | | | - Geneviève Chabot-Roy
- Cellular Immunogenetics laboratory, Division of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montreal, Quebec, H1T 2M4, Canada
| | - Sylvie Lesage
- Cellular Immunogenetics laboratory, Division of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montreal, Quebec, H1T 2M4, Canada.
- Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montreal, Quebec, H3C 3J7, Canada.
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Liu YH, Mölzer C, Makinen K, Kamoi K, Corbett CLC, Klaska IP, Reid DM, Wilson HM, Kuffová L, Cornall RJ, Forrester JV. Treatment With FoxP3+ Antigen-Experienced T Regulatory Cells Arrests Progressive Retinal Damage in a Spontaneous Model of Uveitis. Front Immunol 2020; 11:2071. [PMID: 33013877 PMCID: PMC7498671 DOI: 10.3389/fimmu.2020.02071] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 07/29/2020] [Indexed: 01/17/2023] Open
Abstract
We specify the clinical features of a spontaneous experimental autoimmune uveitis (EAU) model, in which foreign hen-egg lysozyme (HEL) is expressed in the retina, controlled by the promoter for interphotoreceptor retinol binding protein (IRBP). We previously reported 100% P21 (post-partum day) IRBP:HEL single transgenic (sTg) mice, when crossed to transgenic T cell receptor mice (3A9) generating the double transgenic (dTg) genotype, develop EAU despite profound lymphopenia (thymic HEL-specific T cell deletion). In this work, we characterized the immune component of this model and found conventional dTg CD4+ T cells were less anergic than those from 3A9 controls. Furthermore, prior in vitro HEL-activation of 3A9 anergic T cells (Tan) rendered them uveitogenic upon adoptive transfer (Tx) to sTg mice, while antigen-experienced (AgX, dTg), but not naïve (3A9) T cells halted disease in P21 dTg mice. Flow cytometric analysis of the AgX cells elucidated the underlying pathology: FoxP3+CD25hiCD4+ T regulatory cells (Treg) comprised ∼18%, while FR4+CD73+FoxP3-CD25lo/–CD4+ Tan comprised ∼1.2% of total cells. Further Treg-enrichment (∼80%) of the AgX population indicated FoxP3+CD25hiCD4+ Treg played a key role in EAU-suppression while FoxP3-CD25lo/–CD4+ T cells did not. Here we present the novel concept of dual immunological tolerance where spontaneous EAU is due to escape from anergy with consequent failure of Treg induction and subsequent imbalance in the [Treg:Teffector] cell ratio. The reduced numbers of Tan, normally sustaining Treg to prevent autoimmunity, are the trigger for disease, while immune homeostasis can be restored by supplementation with AgX, but not naïve, antigen-specific Treg.
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Affiliation(s)
- Yi-Hsia Liu
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Christine Mölzer
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Kimmo Makinen
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Koju Kamoi
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Clare L C Corbett
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Izabela P Klaska
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Delyth M Reid
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Heather M Wilson
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Lucia Kuffová
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Richard J Cornall
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - John V Forrester
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
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Collin R, Doyon K, Mullins-Dansereau V, Karam M, Chabot-Roy G, Hillhouse EE, Orthwein A, Lesage S. Genetic interaction between two insulin-dependent diabetes susceptibility loci, Idd2 and Idd13, in determining immunoregulatory DN T cell proportion. Immunogenetics 2018; 70:495-509. [PMID: 29696366 DOI: 10.1007/s00251-018-1060-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 04/12/2018] [Indexed: 12/21/2022]
Abstract
Several immune regulatory cell types participate in the protection against autoimmune diseases such as autoimmune diabetes. Of these immunoregulatory cells, we and others have shown that peripheral CD4-CD8- double negative (DN) T cells can induce antigen-specific immune tolerance. Particularly, we have described that diabetes-prone mice exhibit a lower number of peripheral DN T cells compared to diabetes-resistant mice. Identifying the molecular pathways that influence the size of the DN T cell pool in peripheral lymphoid organs may thus be of interest for maintaining antigen-specific immune tolerance. Hence, through immunogenetic approaches, we found that two genetic loci linked to autoimmune diabetes susceptibility, namely Idd2 and Idd13, independently contribute to the partial restoration of DN T cell proportion in secondary lymphoid organs. We now extend these findings to show an interaction between the Idd2 and Idd13 loci in determining the number of DN T cells in secondary lymphoid organs. Using bioinformatics tools, we link potential biological pathways arising from interactions of genes encoded within the two loci. By focusing on cell cycle, we validate that both the Idd2 and Idd13 loci influence RAD51 expression as well as DN T cell progression through the cell cycle. Altogether, we find that genetic interactions between Idd2 and Idd13 loci modulate cell cycle progression, which contributes, at least in part, to defining the proportion of DN T cells in secondary lymphoid organs.
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Affiliation(s)
- Roxanne Collin
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada.,Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Kathy Doyon
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada
| | - Victor Mullins-Dansereau
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada.,Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Martin Karam
- Division of Experimental Medicine, McGill University, Montréal, Québec, H4A 3J1, Canada.,Lady Davis Institute, Jewish General Hospital, 3755 Côte Ste-Catherine, Montréal, Québec, H3T 1E2, Canada
| | - Geneviève Chabot-Roy
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada
| | - Erin E Hillhouse
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada
| | - Alexandre Orthwein
- Division of Experimental Medicine, McGill University, Montréal, Québec, H4A 3J1, Canada. .,Lady Davis Institute, Jewish General Hospital, 3755 Côte Ste-Catherine, Montréal, Québec, H3T 1E2, Canada. .,Department of Oncology, McGill University, Montréal, Québec, H4A 3J1, Canada.
| | - Sylvie Lesage
- Division of Immunology-oncology, Maisonneuve-Rosemont Hospital, Research Center, Montréal, 5415 l'Assomption Blvd, Québec, H1T 2M4, Canada. .,Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada.
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