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Bourel C, Mullins-Dansereau V, Al Khaldi M, Chabot-Roy G, Lombard-Vadnais F, Lesage S. Uncoupling of Natural Killer cell functional maturation and cytolytic function in NOD mice. Immunol Cell Biol 2023; 101:867-874. [PMID: 37536708 DOI: 10.1111/imcb.12676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 08/05/2023]
Abstract
NK cells are innate immune cells that target infected and tumor cells. Mature NK (mNK) cells undergo functional maturation characterized by four distinct stages, during which they acquire their cytotoxic properties. mNK cells from non-obese diabetic (NOD) mice exhibit a defect in functional maturation and have impaired cytotoxic functions. Hence, we tested whether the impaired cytotoxic function observed in mNK cells from NOD mice can be explained by their defect in functional maturation. By comparing the function of mNK cells from B6, B6g7 and NOD mice, we show that the expression of granzyme B is severely impaired in mNK cells from NOD mice, agreeing with their inability to control tumor growth in vivo. The low level of granzyme B expression in mNK cells from NOD mice is found at all stages of functional maturation and is therefore independent of their functional maturation defect. Consequently, this study demonstrates that phenotypic functional maturation of mNK cells can be uncoupled from the acquisition of cytotoxic functions.
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Affiliation(s)
- Capucine Bourel
- Immunologie-oncologie, Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, QC, Canada
| | - Victor Mullins-Dansereau
- Immunologie-oncologie, Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, QC, Canada
| | - Maher Al Khaldi
- Immunologie-oncologie, Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Département de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Geneviève Chabot-Roy
- Immunologie-oncologie, Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
| | - Félix Lombard-Vadnais
- Immunologie-oncologie, Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
| | - Sylvie Lesage
- Immunologie-oncologie, Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, QC, Canada
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2
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Lombard-Vadnais F, Chabot-Roy G, Zahn A, Rodriguez Torres S, Di Noia JM, Melichar HJ, Lesage S. Activation-induced cytidine deaminase expression by thymic B cells promotes T-cell tolerance and limits autoimmunity. iScience 2022; 26:105852. [PMID: 36654860 PMCID: PMC9840937 DOI: 10.1016/j.isci.2022.105852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 11/24/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Elimination of self-reactive T cells in the thymus is critical to establish T-cell tolerance. A growing body of evidence suggests a role for thymic B cells in the elimination of self-reactive thymocytes. To specifically address the role of thymic B cells in central tolerance, we investigated the phenotype of thymic B cells in various mouse strains, including non-obese diabetic (NOD) mice, a model of autoimmune diabetes. We noted that isotype switching of NOD thymic B cells is reduced as compared to other, autoimmune-resistant, mouse strains. To determine the impact of B cell isotype switching on thymocyte selection and tolerance, we generated NOD.AID-/- mice. Diabetes incidence was enhanced in these mice. Moreover, we observed reduced clonal deletion and a resulting increase in self-reactive CD4+ T cells in NOD.AID-/- mice relative to NOD controls. Together, this study reveals that AID expression in thymic B cells contributes to T-cell tolerance.
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Affiliation(s)
- Félix Lombard-Vadnais
- Immunologie-oncologie, Centre de recherche de l’Hôpital Maisonneuve-Rosemont, Montréal, QC H1T 2M4, Canada,Department of Microbiology & Immunology, McGill University, Montreal, QC H3A 0G4, Canada
| | - Geneviève Chabot-Roy
- Immunologie-oncologie, Centre de recherche de l’Hôpital Maisonneuve-Rosemont, Montréal, QC H1T 2M4, Canada
| | - Astrid Zahn
- Unité de recherche en biologie moléculaire des cellules B, Institut de recherches cliniques de Montréal, Montréal, QC H2W 1R7, Canada
| | - Sahily Rodriguez Torres
- Immunologie-oncologie, Centre de recherche de l’Hôpital Maisonneuve-Rosemont, Montréal, QC H1T 2M4, Canada,Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Javier M. Di Noia
- Department of Microbiology & Immunology, McGill University, Montreal, QC H3A 0G4, Canada,Unité de recherche en biologie moléculaire des cellules B, Institut de recherches cliniques de Montréal, Montréal, QC H2W 1R7, Canada,Département de médecine, Université de Montréal, Montréal, QC H3T 1J4, Canada,Department of Experimental Medicine, McGill University, Montreal, QC H3A 0G4, Canada
| | - Heather J. Melichar
- Immunologie-oncologie, Centre de recherche de l’Hôpital Maisonneuve-Rosemont, Montréal, QC H1T 2M4, Canada,Département de médecine, Université de Montréal, Montréal, QC H3T 1J4, Canada,Corresponding author
| | - Sylvie Lesage
- Immunologie-oncologie, Centre de recherche de l’Hôpital Maisonneuve-Rosemont, Montréal, QC H1T 2M4, Canada,Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, QC H3T 1J4, Canada,Corresponding author
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3
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Pasquin S, Pelletier AN, Lombard-Vadnais F, Chabot-Roy G, Collin R, Coderre L, Lesage S. Investigating immune tolerance: characterization of immunoregulatory DN T cells. The Journal of Immunology 2022. [DOI: 10.4049/jimmunol.208.supp.44.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
Autoimmunity results from defects in immune tolerance pathways that impair the capacity of immune cells to distinguish between self and non-self. One of these immune tolerance processes involves immunoregulatory TCRαβ+CD4−CD8− double negative T cells (DN T). Indeed, DN T cells protect from autoimmune pathologies and graft rejection in mice. Similarly, high DN T cell numbers correlate with a low incidence of chronic graft-versus-host disease in humans, an autoimmune-like pathology. While the thymic differentiation process of DN T cells was recently described, the function of these unconventional T cells is still poorly documented. To characterize DN T cells, we performed bulk RNA sequencing on CD4, CD8, γδ and DN T cells isolated from mouse spleen. Comparison of the transcriptome profiles revealed that DN T cells express a unique signature. Moreover, following in vitro stimulation, we find that DN T cells also present a distinct cytokine secretion pattern. Interestingly, we observed a lower induction of CD69, LAG-3 and PD-1 on DN T cells in comparison to CD4 and CD8 T cells, whereas LCK phosphorylation is unabated. DN T cell proliferation in mixed lymphocyte reactions is also lower than that of CD4 and CD8 T cells. Overall, our transcriptomic and cytokine analyses clearly identify DN T cells as a unique T cell subset. Moreover, while DN T cells do not express an exhaustion profile, they are more refractory to in vitro T cell stimulation than conventional T cells. A better characterization of DN T cell function will help conceive novel immunotherapies to treat autoimmune diseases.
Supported by the Canadian Institutes of Health Research - PJT 159603. S.P. was supported by a postdoctoral CIHR fellowship
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Affiliation(s)
- Sarah Pasquin
- 1Centre de recherche Hôpital Maisonneuve-Rosemont, Université de Montréal, Montreal, QC, Canada
| | | | - Félix Lombard-Vadnais
- 1Centre de recherche Hôpital Maisonneuve-Rosemont, Université de Montréal, Montreal, QC, Canada
| | - Geneviève Chabot-Roy
- 1Centre de recherche Hôpital Maisonneuve-Rosemont, Université de Montréal, Montreal, QC, Canada
| | - Roxanne Collin
- 1Centre de recherche Hôpital Maisonneuve-Rosemont, Université de Montréal, Montreal, QC, Canada
| | - Lise Coderre
- 1Centre de recherche Hôpital Maisonneuve-Rosemont, Université de Montréal, Montreal, QC, Canada
| | - Sylvie Lesage
- 1Centre de recherche Hôpital Maisonneuve-Rosemont, Université de Montréal, Montreal, QC, Canada
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Dimitriadou V, Chabot-Roy G, Audiger C, Banu I, Delisle JS, Lesage S. Apraglutide Decreases Severity of Intestinal Damage from Acute Gastrointestinal Graft Versus Host Disease (GI-GvHD) Following Allogeneic Transplantation without Impacting Engraftment. Transplant Cell Ther 2022. [DOI: 10.1016/s2666-6367(22)00510-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lombard-Vadnais F, Collin R, Daudelin JF, Chabot-Roy G, Labrecque N, Lesage S. The Idd2 Locus Confers Prominent Resistance to Autoimmune Diabetes. J Immunol 2022; 208:898-909. [PMID: 35039332 DOI: 10.4049/jimmunol.2100456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 12/02/2021] [Indexed: 06/14/2023]
Abstract
Type 1 diabetes is an autoimmune disease characterized by pancreatic β cell destruction. It is a complex genetic trait driven by >30 genetic loci with parallels between humans and mice. The NOD mouse spontaneously develops autoimmune diabetes and is widely used to identify insulin-dependent diabetes (Idd) genetic loci linked to diabetes susceptibility. Although many Idd loci have been extensively studied, the impact of the Idd2 locus on autoimmune diabetes susceptibility remains to be defined. To address this, we generated a NOD congenic mouse bearing B10 resistance alleles on chromosome 9 in a locus coinciding with part of the Idd2 locus and found that NOD.B10-Idd2 congenic mice are highly resistant to diabetes. Bone marrow chimera and adoptive transfer experiments showed that the B10 protective alleles provide resistance in an immune cell-intrinsic manner. Although no T cell-intrinsic differences between NOD and NOD.B10-Idd2 mice were observed, we found that the Idd2 resistance alleles limit the formation of spontaneous and induced germinal centers. Comparison of B cell and dendritic cell transcriptome profiles from NOD and NOD.B10-Idd2 mice reveal that resistance alleles at the Idd2 locus affect the expression of specific MHC molecules, a result confirmed by flow cytometry. Altogether, these data demonstrate that resistance alleles at the Idd2 locus impair germinal center formation and influence MHC expression, both of which likely contribute to reduced diabetes incidence.
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Affiliation(s)
- Félix Lombard-Vadnais
- Immunology-Oncology Axis, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada
- Department of Microbiology and Immunology, McGill University, Montreal, Quebec, Canada
| | - Roxanne Collin
- Immunology-Oncology Axis, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec, Canada; and
| | - Jean-François Daudelin
- Immunology-Oncology Axis, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada
| | - Geneviève Chabot-Roy
- Immunology-Oncology Axis, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada
| | - Nathalie Labrecque
- Immunology-Oncology Axis, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec, Canada; and
- Département de Médecine, Université de Montréal, Montreal, Quebec, Canada
| | - Sylvie Lesage
- Immunology-Oncology Axis, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada;
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec, Canada; and
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Boucher G, Paradis A, Chabot-Roy G, Coderre L, Hillhouse EE, Bitton A, Des Rosiers C, Levings MK, Schumm LP, Lazarev M, Brant SR, Duerr R, McGovern D, Silverberg MS, Cho J, Lesage S, Rioux JD. Serum Analyte Profiles Associated With Crohn's Disease and Disease Location. Inflamm Bowel Dis 2021; 28:9-20. [PMID: 34106269 PMCID: PMC8730700 DOI: 10.1093/ibd/izab123] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Crohn's disease (CD) can affect any segment of the digestive tract but is most often localized in the ileal, ileocolonic, and colorectal regions of the intestines. It is believed that the chronic inflammation in CD is a result of an imbalance between the epithelial barrier, the immune system, and the intestinal microbiota. The aim of the study was to identify circulating markers associated with CD and/or disease location in CD patients. METHODS We tested 49 cytokines, chemokines, and growth factors in serum samples from 300 patients with CD and 300 controls. After quality control, analyte levels were tested for association with CD and disease location. RESULTS We identified 13 analytes that were higher in CD patients relative to healthy controls and that remained significant after conservative Bonferroni correction (P < 0.0015). In particular, CXCL9, CXCL1, and interleukin IL-6 had the greatest effect and were highly significant (P < 5 × 10-7). We also identified 9 analytes that were associated with disease location, with VEGF, IL-12p70, and IL-6 being elevated in patients with colorectal disease (P < 3 × 10-4). CONCLUSIONS Multiple serum analytes are elevated in CD. These implicate the involvement of multiple cell types from the immune, epithelial, and endothelial systems, suggesting that circulating analytes reflect the inflammatory processes that are ongoing within the gut. Moreover, the identification of distinct profiles according to disease location supports the existence of a biological difference between ileal and colonic CD, consistent with previous genetic and clinical observations.
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Affiliation(s)
| | - Alexandre Paradis
- Maisonneuve-Rosemont Hospital Research Center, Montréal, Québec, Canada
| | | | - Lise Coderre
- Maisonneuve-Rosemont Hospital Research Center, Montréal, Québec, Canada
| | - Erin E Hillhouse
- Maisonneuve-Rosemont Hospital Research Center, Montréal, Québec, Canada
| | - Alain Bitton
- Division of Gastroenterology, McGill University, Montreal, Québec, Canada
| | - Christine Des Rosiers
- Montreal Heart Institute, Montréal, Québec, Canada,Département de Nutrition, Université de Montréal, Montréal, Québec, Canada
| | - Megan K Levings
- BC Children’s Hospital Research Institute, Vancouver, British Columbia, Canada
| | - L Philip Schumm
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
| | - Mark Lazarev
- The Harvey M. and Lyn P. Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Steve R Brant
- The Harvey M. and Lyn P. Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA,Division of Gastroenterology and Hepatology, Department of Medicine, Rutgers Robert Wood Johnson Medical School, and Department of Genetics and the Human Genetics Institute of New Jersey, Rutgers University, New Brunswick and Piscataway, New Jersey, USA
| | - Richard Duerr
- Department of Medicine, University of Pittsburgh, Pennsylvania, USA
| | - Dermot McGovern
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Mark S Silverberg
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Mount Sinai Hospital Inflammatory Bowel Disease Centre, Toronto, Ontario, USA
| | - Judy Cho
- Icahn School of Medicine, Mount Sinai, New York, New York, USA
| | - Sylvie Lesage
- Maisonneuve-Rosemont Hospital Research Center, Montréal, Québec, Canada,Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Québec, Canada
| | - John D Rioux
- Montreal Heart Institute, Montréal, Québec, Canada,Département de Médicine, Université de Montréal, Montréal, Québec, Canada,Address for correspondence: John D. Rioux, Montreal Heart Institute Research Centre, 5000 Rue Bélanger, S-6201, Montreal, Quebec, H1T 1C8, Canada. E-mail:
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7
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Pilon C, Lesage S, Chabot-Roy G, Levine JS, Rauch J. Deficiency of RIPK3 (receptor-interacting protein kinase 3) in antigen-presenting cells dampens the pro-inflammatory T cell response following antigen presentation. The Journal of Immunology 2021. [DOI: 10.4049/jimmunol.206.supp.93.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Abstract
STUDY OBJECTIVE: We have previously shown that RIPK3 (receptor-interacting protein kinase 3)-deficient mice are protected from the development of an induced murine model of systemic lupus erythematosus (SLE). The development of SLE autoantibodies in this model is associated with the generation of an antigen-specific T cell response. We hypothesize that RIPK3-deficient antigen-presenting cells (APCs) are impaired in generation of a robust T cell response, thereby impacting induction of SLE in our murine model.
METHODS:
We performed a complete cellular immunophenotyping on mice deficient in RIPK3, compared with wild type C57BL/6 mice. We also assessed the function of RIPK3-deficient APCs in an in vitro antigen presentation assay using ovalbumin (OVA) and OVA-specific OT-II T cells.
RESULTS:
No major differences in immune cell composition and phenotype were identified between naïve RIPK3-deficient and WT mice. However, RIPK3-deficient bone marrow-derived dendritic cells (BMDCs) were found to produce lower levels of pro-inflammatory cytokines (interleukin [IL]-6 and tumor necrosis factor [TNF]-α) following lipopolysaccharide (LPS) stimulation. Moreover, presentation of OVA by RIPK3-deficient BMDCs resulted in a lower proportion of interferon (IFN)-γ producing OT-II T cells, compared to antigen presentation by WT BMDCs. In contrast, T cell proliferation was similar whether antigen was presented by RIPK3-deficient or WT BMDCs.
CONCLUSION:
Our results suggest that RIPK3 deficiency in APCs impacts antigen presentation to T cells, identifying a possible mechanism by which RIPK3-deficient mice are protected from induction of SLE.
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Affiliation(s)
- Celeste Pilon
- 1Div. of Rheumatology and Div. of Exptl. Med., Dept. of Med., McGill Univ., Infectious Dis. and Immunity in Global Hlth. Programme, Res. Inst. of the McGill Univ. Hlth. Cntr., Montreal, QC, Canada
| | | | | | | | - Joyce Rauch
- 1Div. of Rheumatology and Div. of Exptl. Med., Dept. of Med., McGill Univ., Infectious Dis. and Immunity in Global Hlth. Programme, Res. Inst. of the McGill Univ. Hlth. Cntr., Montreal, QC, Canada
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8
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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9
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Huang H, Zuzarte-Luis V, Fragoso G, Calvé A, Hoang TA, Oliero M, Chabot-Roy G, Mullins-Dansereau V, Lesage S, Santos MM. Acute invariant NKT cell activation triggers an immune response that drives prominent changes in iron homeostasis. Sci Rep 2020; 10:21026. [PMID: 33273556 PMCID: PMC7713400 DOI: 10.1038/s41598-020-78037-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 11/19/2020] [Indexed: 12/17/2022] Open
Abstract
Iron homeostasis is an essential biological process that ensures the tissue distribution of iron for various cellular processes. As the major producer of hepcidin, the liver is central to the regulation of iron metabolism. The liver is also home to many immune cells, which upon activation may greatly impact iron metabolism. Here, we focus on the role of invariant natural killer T (iNKT) cells, a subset of T lymphocytes that, in mice, is most abundant in the liver. Activation of iNKT cells with the prototypical glycosphingolipid antigen, α-galactosylceramide, resulted in immune cell proliferation and biphasic changes in iron metabolism. This involved an early phase characterized by hypoferremia, hepcidin induction and ferroportin suppression, and a second phase associated with strong suppression of hepcidin despite elevated levels of circulating and tissue iron. We further show that these changes in iron metabolism are fully dependent on iNKT cell activation. Finally, we demonstrate that the biphasic regulation of hepcidin is independent of NK and Kupffer cells, and is initially driven by the STAT3 inflammatory pathway, whereas the second phase is regulated by repression of the BMP/SMAD signaling pathway. These findings indicate that iNKT activation and the resulting cell proliferation influence iron homeostasis.
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Affiliation(s)
- Hua Huang
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Département de Médecine, Université de Montréal, Montréal, Québec, Canada
| | | | - Gabriela Fragoso
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - Annie Calvé
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - Tuan Anh Hoang
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Département de Médecine, Université de Montréal, Montréal, Québec, Canada.,Centre INRS-Institut Armand-Frappier, Institut National de La Recherche Scientifique, 531 Boulevard des Prairies, Laval, Québec, Canada
| | - Manon Oliero
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Québec, Canada
| | | | - Victor Mullins-Dansereau
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Québec, Canada
| | - Sylvie Lesage
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Québec, Canada.,Maisonneuve-Rosemont Hospital Research Centre (CRHMR), Montréal, Québec, Canada
| | - Manuela M Santos
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada. .,Département de Médecine, Université de Montréal, Montréal, Québec, Canada. .,Nutrition and Microbiome Laboratory, CRCHUM-R10.426, 900 rue Saint-Denis, Montréal, Québec, H2X 0A9, Canada.
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10
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Collin R, Lombard-Vadnais F, Hillhouse EE, Lebel MÈ, Chabot-Roy G, Melichar HJ, Lesage S. MHC-Independent Thymic Selection of CD4 and CD8 Coreceptor Negative αβ T Cells. J Immunol 2020; 205:133-142. [PMID: 32434937 DOI: 10.4049/jimmunol.2000156] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/23/2020] [Indexed: 12/12/2022]
Abstract
It is becoming increasingly clear that unconventional T cell subsets, such as NKT, γδ T, mucosal-associated invariant T, and CD8αα T cells, each play distinct roles in the immune response. Subsets of these cell types can lack both CD4 and CD8 coreceptor expression. Beyond these known subsets, we identify CD4-CD8-TCRαβ+, double-negative (DN) T cells, in mouse secondary lymphoid organs. DN T cells are a unique unconventional thymic-derived T cell subset. In contrast to CD5high DN thymocytes that preferentially yield TCRαβ+ CD8αα intestinal lymphocytes, we find that mature CD5low DN thymocytes are precursors to peripheral DN T cells. Using reporter mouse strains, we show that DN T cells transit through the immature CD4+CD8+ (double-positive) thymocyte stage. Moreover, we provide evidence that DN T cells can differentiate in MHC-deficient mice. Our study demonstrates that MHC-independent thymic selection can yield DN T cells that are distinct from NKT, γδ T, mucosal-associated invariant T, and CD8αα T cells.
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Affiliation(s)
- Roxanne Collin
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec H1T 2M4, Canada.,Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec H3C 3J7, Canada
| | - Félix Lombard-Vadnais
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec H1T 2M4, Canada.,Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 0G4, Canada; and
| | - Erin E Hillhouse
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec H1T 2M4, Canada
| | - Marie-Ève Lebel
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec H1T 2M4, Canada
| | - Geneviève Chabot-Roy
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec H1T 2M4, Canada
| | - Heather J Melichar
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec H1T 2M4, Canada.,Département de Médecine, Université de Montréal, Montreal, Quebec H3T 1J4, Canada
| | - Sylvie Lesage
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec H1T 2M4, Canada; .,Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec H3C 3J7, Canada
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11
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Hurtubise R, Audiger C, Dominguez-Punaro MC, Chabot-Roy G, Chognard G, Raymond-Marchand L, Coderre L, Chemtob S, Michnick SW, Rioux JD, Lesage S. Induced and spontaneous colitis mouse models reveal complex interactions between IL-10 and IL-12/IL-23 pathways. Cytokine 2019; 121:154738. [DOI: 10.1016/j.cyto.2019.154738] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 05/13/2019] [Accepted: 05/28/2019] [Indexed: 02/08/2023]
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12
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Leblanc-Hotte A, Sen Nkwe N, Chabot-Roy G, Affar EB, Lesage S, Delisle JS, Peter YA. On-chip refractive index cytometry for whole-cell deformability discrimination. Lab Chip 2019; 19:464-474. [PMID: 30570636 DOI: 10.1039/c8lc00938d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
On-chip high-throughput phenotyping of single cells has gained a lot of interest recently due to the discrimination capability of label-free biomarkers such as whole-cell deformability and refractive index. Here we present on-chip refractive index cytometry (RIC) for whole-cell deformability at a high measurement rate. We have further exploited a previously published on-chip optical characterization method which enhances cellular discrimination through the refractive index measurement of single cells. The proposed on-chip RIC can simultaneously probe the cellular refractive index, effective volume and whole-cell deformability while reaching a measurement rate up to 5000 cells per second. Additionally, the relative position of the nucleus inside the cell is reflected by the asymmetry of the measured curve. This particular finding is confirmed by our numerical simulation model and emphasized by a modified cytoskeleton HL-60 cells model. Furthermore, the proposed device discriminated HL-60 derived myeloid cells such as neutrophils, basophils and promyelocytes, which are indistinguishable using flow cytometry. To our knowledge, this is the first integrated device to simultaneously characterize the cellular refractive index and whole-cell deformability, yielding enhanced discrimination of large myeloid cell populations.
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Affiliation(s)
- Antoine Leblanc-Hotte
- Department of Engineering Physics, Polytechnique Montreal, Montreal, QC H3T 1J4, Canada.
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13
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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14
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Audiger C, Chabot-Roy G, Lesage S. Characterization of merocytic dendritic cells homeostasis. The Journal of Immunology 2017. [DOI: 10.4049/jimmunol.198.supp.221.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
In contrast to conventional dendritic cells (cDC), when merocytic DC (mcDC) present antigens (Ag) derived from apoptotic bodies, T cell anergy is reversed rather than induced. Although helpful to tumor clearance, reversing T cell anergy is detrimental in autoimmunity. Interestingly, mcDC are present in higher proportion in type 1 diabetes (T1D)-prone NOD mice than in B6 mice. Still, little is known about the immunological properties of mcDC that define them as a DC subset. Phenotypic characterization of mcDC revealed that they express the cDC-restricted transcription factor, Zbtb46. Moreover, we found that mcDC are potent inducers of mixed lymphocyte reactions, a key trait defining them as cDC. Investigation of other transcription factors associated with specific cDC functions, such as Irf4 and Irf8, reveal that mcDC are heterogeneous, with phenotypic and functional characteristics more closely resembling CD8α cDC. Comparative gene profiles by principal component analysis revealed that mcDC clustered more closley to CD8α cDC than other DC subsets. Still, mcDC are distinct from CD8α cDC, as mcDC are present in Batf3-deficient mice. Together, these data demonstrate that mcDC are a cDC subset with unique ability to break antigen specific tolerance. Understanding the homeostatic regulation of this new cDC subset will permit to develop new therapies for diseases, such as autoimmunity or cancer where they can be either pathogenic or beneficial.
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Affiliation(s)
| | | | - Sylvie Lesage
- 1Univ. of Montreal, Canada
- 2Maisonneuve-Rosemont Hospital Research Center, Canada
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Audiger C, Chabot-Roy G, Lesage S. Bim is a candidate gene in the regulation of merocytic dendritic cell proportion. The Journal of Immunology 2016. [DOI: 10.4049/jimmunol.196.supp.48.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
In contrast to conventional dendritic cells (cDC), when merocytic DC (mcDC) present antigens (Ag) derived from apoptotic bodies, T cell anergy is reversed rather than induced. Although helpful to tumour clearance, reversing T cell anergy is detrimental in autoimmunity. Interestingly, mcDC are present in higher proportion in type 1 diabetes (T1D)-prone NOD mice than in B6 mice. Recently, we found that the Idd13 T1D locus is linked to the control of mcDC number. Indeed, NOD.B6-Idd13 congenic mice are resistant to T1D and have the same low number of mcDC as the parental B6 mice. Thus, we hypothesize that defining the genetic factor implicated in the regulation of mcDC number could help maintain self-tolerance and prevent T1D onset. Within the Idd13 locus, both B2m and Bim are likely candidate genes. By exploiting both B2m−/−and Bim−/−mice, we show that B2m does not affect mcDC number while mcDC were significantly increased in Bim−/−mice. Competitive hematopoietic chimera validate Bim as an intrinsic factor implicated in the regulation of mcDC proportion. In line with a role for Bim in regulating mcDC number, we demonstrate that the caspase activity and Bcl2 expression is not differentially expressed between the different mouse model, suggesting that Bim is implicated in mcDC proportion regulation via a caspase-independent pathway.
Together, these data demonstrate that Bim, encoded within the Idd13 locus on the chromosome 2 modulates the number of mcDC. Identifying factors that facilitate apoptosis of mcDC may help prevent autoimmunity. Still, whether restoring Bim expression in NOD mice would prevent T1D remains to be addressed.
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Affiliation(s)
- Cindy Audiger
- 1Univ. of Montreal, Canada
- 2Maisonneuve-Rosemont Hosp. Res. Ctr., Canada
| | | | - Sylvie Lesage
- 1Univ. of Montreal, Canada
- 2Maisonneuve-Rosemont Hosp. Res. Ctr., Canada
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16
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Collin R, Dugas V, Chabot-Roy G, Salem D, Zahn A, Di Noia JM, Rauch J, Lesage S. Autoimmunity and antibody affinity maturation are modulated by genetic variants on mouse chromosome 12. J Autoimmun 2015; 58:90-9. [PMID: 25623266 DOI: 10.1016/j.jaut.2015.01.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 01/12/2015] [Accepted: 01/13/2015] [Indexed: 11/25/2022]
Abstract
Autoimmune diseases result from a break in immune tolerance leading to an attack on self-antigens. Autoantibody levels serve as a predictive tool for the early diagnosis of many autoimmune diseases, including type 1 diabetes. We find that a genetic locus on mouse chromosome 12 influences the affinity maturation of antibodies as well as autoantibody production. Thus, we generated a NOD.H2(k) congenic strain bearing B10 alleles at the locus comprised within the D12Mit184 and D12Mit12 markers, which we named NOD.H2(k)-Chr12. We determined the biological relevance of the Chr12 locus on the autoimmune process using an antigen-specific TCR transgenic autoimmune mouse model. Specifically, the 3A9 TCR transgene, which recognizes a peptide from hen egg lysozyme (HEL) in the context of I-A(k), and the HEL transgene, which is expressed under the rat-insulin promoter (iHEL), were bred into the NOD.H2(k)-Chr12 congenic strain. In the resulting 3A9 TCR:iHEL NOD.H2(k)-Chr12 mice, we observed a significant decrease in diabetes incidence as well as a decrease in both the quantity and affinity of HEL-specific IgG autoantibodies relative to 3A9 TCR:iHEL NOD.H2(k) mice. Notably, the decrease in autoantibodies due to the Chr12 locus was not restricted to the TCR transgenic model, as it was also observed in the non-transgenic NOD.H2(k) setting. Of importance, antibody affinity maturation upon immunization and re-challenge was also impeded in NOD.H2(k)-Chr12 congenic mice relative to NOD.H2(k) mice. Together, these results demonstrate that a genetic variant(s) present within the Chr12 locus plays a global role in modulating antibody affinity maturation.
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Affiliation(s)
- Roxanne Collin
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital, Montréal, Québec, H1T 2M4, Canada; Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada.
| | - Véronique Dugas
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital, Montréal, Québec, H1T 2M4, Canada; Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada; Mitacs, Computer Research Institute of Montreal, Montréal, Québec, H3N 1M3, Canada.
| | - Geneviève Chabot-Roy
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital, Montréal, Québec, H1T 2M4, Canada.
| | - David Salem
- Division of Rheumatology, Department of Medicine, Research Institute of the McGill University Health Centre, Montréal, Québec, H3G 1A4, Canada.
| | - Astrid Zahn
- Division of Immunology and Viral Infections, Institut de Recherches Cliniques de Montréal, Montréal, Québec, H2W 1R7, Canada.
| | - Javier M Di Noia
- Division of Immunology and Viral Infections, Institut de Recherches Cliniques de Montréal, Montréal, Québec, H2W 1R7, Canada; Département de Médecine, Université de Montréal, Montréal, Québec, H3T 1J4, Canada.
| | - Joyce Rauch
- Division of Rheumatology, Department of Medicine, Research Institute of the McGill University Health Centre, Montréal, Québec, H3G 1A4, Canada.
| | - Sylvie Lesage
- Immunology-Oncology Section, Maisonneuve-Rosemont Hospital, Montréal, Québec, H1T 2M4, Canada; Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada.
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Collin R, Dugas V, Pelletier AN, Chabot-Roy G, Lesage S. The mouse idd2 locus is linked to the proportion of immunoregulatory double-negative T cells, a trait associated with autoimmune diabetes resistance. J Immunol 2014; 193:3503-12. [PMID: 25165153 DOI: 10.4049/jimmunol.1400189] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Autoimmune diseases result from a break in immune tolerance. Various mechanisms of peripheral tolerance can protect against autoimmunity, including immunoregulatory CD4(-)CD8(-) double-negative (DN) T cells. Indeed, we have previously shown that diabetes-prone mouse strains exhibit a low proportion of DN T cells relative to that of diabetes-resistant mice, and that a single autologous transfer of DN T cells can impede autoimmune diabetes development, at least in the 3A9 TCR transgenic setting. In this study, we aim to understand the genetic basis for the difference in DN T cell proportion between diabetes-resistant and diabetes-prone mice. We thus perform an unbiased linkage analysis in 3A9 TCR F2 (NOD.H2(k) × B10.BR) mice and reveal that a locus on chromosome 9, which coincides with Idd2, is linked to the proportion of DN T cells in the lymph nodes. We generate two NOD.H2(k).B10-Chr9 congenic mouse strains and validate the role of this genetic interval in defining the proportion of DN T cells. Moreover, we find that the increased proportion of DN T cells in lymphoid organs is associated with a decrease in both diabetes incidence and serum IgG Ab levels. Together, the data suggest that Idd2 is linked to DN T cell proportion and that a physiological increase in DN T cell number may be sufficient to confer resistance to autoimmune diabetes. Altogether, these findings could help identify new candidate genes for the development of therapeutic avenues aimed at modulating DN T cell number for the prevention of autoimmune diseases.
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Affiliation(s)
- Roxanne Collin
- Division of Immunology-Oncology, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada; Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec H3C 3J7, Canada; and
| | - Véronique Dugas
- Division of Immunology-Oncology, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada; Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec H3C 3J7, Canada; and
| | - Adam-Nicolas Pelletier
- Division of Immunology-Oncology, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada; Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec H3C 3J7, Canada; and
| | - Geneviève Chabot-Roy
- Division of Immunology-Oncology, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada
| | - Sylvie Lesage
- Division of Immunology-Oncology, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada; Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec H3C 3J7, Canada; and Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 0G4, Canada
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18
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Dugas V, Chabot-Roy G, Beauchamp C, Guimont-Desrochers F, Hillhouse EE, Liston A, Lesage S. Unusual selection and peripheral homeostasis for immunoregulatory CD4(-) CD8(-) T cells. Immunology 2013; 139:129-39. [PMID: 23293940 DOI: 10.1111/imm.12064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 12/21/2012] [Accepted: 01/03/2013] [Indexed: 11/27/2022] Open
Abstract
Immunoregulatory CD4(-) CD8(-) (double-negative; DN) T cells exhibit a unique antigen-specific mode of suppression, yet the ontogeny of DN T cells remains enigmatic. We have recently shown that 3A9 T-cell receptor (TCR) transgenic mice bear a high proportion of immunoregulatory 3A9 DN T cells, facilitating their study. The 3A9 TCR is positively selected on the H2(k) MHC haplotype, is negatively selected in mice bearing the cognate antigen, namely hen egg lysozyme, and there is absence of positive selection on the H2(b) MHC haplotype. Herein, we take advantage of this well-defined 3A9 TCR transgenic model to assess the thymic differentiation of DN T cells and its impact on determining the proportion of these cells in secondary lymphoid organs. We find that the proportion of DN T cells in the thymus is not dictated by the nature of the MHC-selecting haplotype. By defining DN T-cell differentiation in 3A9 TCR transgenic CD47-deficient mice as well as in mice bearing the NOD.H2(k) genetic background, we further demonstrate that the proportion of 3A9 DN T cells in the spleen is independent of the MHC selecting haplotype. Together, our findings suggest that immunoregulatory DN T cells are subject to rules distinct from those imposed upon CD4 T cells.
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Affiliation(s)
- Véronique Dugas
- Research Centre, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada
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Hillhouse EE, Collin R, Chabot-Roy G, Guyon MJ, Tessier N, Boulay M, Liscourt P, Lesage S. Nearby Construction Impedes the Progression to Overt Autoimmune Diabetes in NOD Mice. J Diabetes Res 2013; 2013:620313. [PMID: 23691516 PMCID: PMC3652156 DOI: 10.1155/2013/620313] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 03/19/2013] [Accepted: 03/29/2013] [Indexed: 01/17/2023] Open
Abstract
Construction nearby animal houses has sporadically been reported to affect various aspects of animal health. Most of the reports have focussed on the impact on stress hormone levels and the hypersensitivity of animals relative to humans. There has also been an anecdotal report on the impact of construction on autoimmune diabetes in NOD mice. Here, we describe that nearby construction significantly impedes the progression to overt diabetes in female NOD mice offspring. We demonstrate that this was not due to a genetic drift or to particularities associated with our specific mouse colony. Interestingly, although the glycemia levels remained low in mice born from mothers subject to construction stress during gestation, we detected an active autoimmune reaction towards pancreatic islet cells, as measured by both the degree of insulitis and the presence of insulin autoantibody levels in the serum. These results suggest that the external stress imposed during embryonic development does not prevent but significantly delays the autoimmune process. Together, our findings emphasize the impact of surrounding factors during in vivo studies and are in agreement with the hypothesis that both environmental and genetic cues contribute to autoimmune diabetes development.
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Affiliation(s)
- Erin E. Hillhouse
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC, Canada H1T 2M4
- Department of Microbiology and Immunology, University of Montreal, Montréal, QC, Canada H3C 3J7
| | - Roxanne Collin
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC, Canada H1T 2M4
- Department of Microbiology and Immunology, University of Montreal, Montréal, QC, Canada H3C 3J7
| | | | - Marie-Josée Guyon
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC, Canada H1T 2M4
| | - Nathalie Tessier
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC, Canada H1T 2M4
| | - Maryse Boulay
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC, Canada H1T 2M4
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, QC, Canada H2L 2W5
| | - Patricia Liscourt
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC, Canada H1T 2M4
| | - Sylvie Lesage
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC, Canada H1T 2M4
- Department of Microbiology and Immunology, University of Montreal, Montréal, QC, Canada H3C 3J7
- *Sylvie Lesage:
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Guimont-Desrochers F, Beauchamp C, Chabot-Roy G, Dugas V, Hillhouse EE, Dusseault J, Langlois G, Gautier-Ethier P, Darwiche J, Sarfati M, Lesage S. Absence of CD47 in vivo influences thymic dendritic cell subset proportions but not negative selection of thymocytes. Int Immunol 2009; 21:167-77. [PMID: 19147837 DOI: 10.1093/intimm/dxn135] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
CD47 is a ubiquitously expressed molecule which has been attributed a role in many cellular processes. Its role in preventing cellular phagocytosis has defined CD47 as an obligatory self-molecule providing a 'don't-eat-me-signal'. Additionally, CD47-CD172a interactions are important for cellular trafficking. Yet, the contribution of CD47 to T cell stimulation remains controversial, acting sometimes as a co-stimulator and sometimes as an inhibitor of TCR signalling or peripheral T cell responses. Most of the experiments leading to this controversy have been carried in in vitro systems. Moreover, the role of CD47 on thymocyte differentiation, which precisely relies on TCR signal strength, has not been evaluated. Here, we examine the in vivo role of CD47 in T cell differentiation using CD47-deficient mice. We find that, in the absence of CD47, thymocyte positive and negative selection processes are not altered. Indeed, our data demonstrate that the absence of CD47 does not influence the strength of TCR signalling in thymocytes. Furthermore, in agreement with a role for CD47-CD172a interactions in CD172a(+) dendritic cell migration, we report a reduced proportion of thymic dendritic cells expressing CD172a in CD47-deficient mice. As the total proportion of dendritic cells is maintained, this creates an imbalance in the proportion of CD172a(+) and CD172a(low) dendritic cells in the thymus. Together, these data indicate that the altered proportion of thymic dendritic cell subsets does not have a primordial influence on thymic selection processes.
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Affiliation(s)
- Fanny Guimont-Desrochers
- Research Centre, Maisonneuve-Rosemont Hospital, Department of Microbiology and Immunology, University of Montreal, Montreal, Quebec, Canada
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Chabot-Roy G, Willson P, Segura M, Lacouture S, Gottschalk M. Phagocytosis and killing of Streptococcus suis by porcine neutrophils. Microb Pathog 2006; 41:21-32. [PMID: 16714092 DOI: 10.1016/j.micpath.2006.04.001] [Citation(s) in RCA: 120] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2006] [Revised: 03/28/2006] [Accepted: 04/04/2006] [Indexed: 11/19/2022]
Abstract
Streptococcus suis serotype 2 is an important swine pathogen responsible for diverse infections, mainly meningitis. Virulence factors and the pathogenesis of infection are not well understood. Neutrophils may play an important role in the pathogenesis of infection given that infiltration by neutrophils and mononuclear cells are frequently observed in lesions caused by S. suis. The objective of this work was to study the interactions between S. suis serotype 2 and porcine neutrophils. Results showed that suilysin is toxic to neutrophils and this could help S. suis evade innate immunity. Moreover, suilysin appears to affect complement-dependent killing by decreasing the opsonization of S. suis and the bactericidal capacity of neutrophils. Our results confirm that capsule polysaccharide protects S. suis against killing and phagocytosis by neutrophils. We also showed that the presence of specific IgG against S. suis serotype 2 promoted killing by neutrophils, indicating that the induction of a strong humoral response is beneficial for clearance of this pathogen.
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Affiliation(s)
- Geneviève Chabot-Roy
- Groupe de recherche sur les maladies infectieuses du porc (GREMIP), Faculté de médecine vétérinaire, Université de Montréal, 3200 Sicotte, St-Hyacinthe, Qué., Canada J2S 2M2
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