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Rochereau N, Michaud E, Waeckel L, Killian M, Gayet R, Goguyer-Deschaumes R, Roblin X, Biolley G, Corthésy B, Paul S. Essential role of TOSO/FAIM3 in intestinal IgM reverse transcytosis. Cell Rep 2021; 37:110006. [PMID: 34788614 DOI: 10.1016/j.celrep.2021.110006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 05/17/2021] [Accepted: 10/26/2021] [Indexed: 12/30/2022] Open
Abstract
Secretory immunoglobulin A (SIgA) can travel to and from the lumen and transport antigen to subepithelial cells. However, IgM can also multimerize into functional secretory component-bound immunoglobulin. While it is already known that both SIgA and SIgM undergo transcytosis to be secreted at the mucosal surface, only SIgA has been shown to perform retrotranscytosis through microfold cells (M cells) of the Peyer's patch. Here, we investigate whether SIgM could also be taken up by M cells via retrotranscytosis. This transport involves FcμR binding at the apical membrane of M cells. We then demonstrate that SIgM can be exploited by SIgM-p24 (HIV-capsid protein) complexes during immunization in the nasal- or gut-associated lymphoid tissue (NALT or GALT), conferring efficient immune responses against p24. Our data demonstrate a mucosal function of SIgM, which could play a role in the regulation of mucosal immunity.
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Affiliation(s)
- Nicolas Rochereau
- Centre International de Recherche en Infectiologie (CIRI), Team GIMAP, Université de Lyon, Université Claude Bernard Lyon 1, INSERM, U1111, CNRS, UMR530, CIC 1408 Vaccinology, 42023 Saint-Etienne, France
| | - Eva Michaud
- Centre International de Recherche en Infectiologie (CIRI), Team GIMAP, Université de Lyon, Université Claude Bernard Lyon 1, INSERM, U1111, CNRS, UMR530, CIC 1408 Vaccinology, 42023 Saint-Etienne, France
| | - Louis Waeckel
- Centre International de Recherche en Infectiologie (CIRI), Team GIMAP, Université de Lyon, Université Claude Bernard Lyon 1, INSERM, U1111, CNRS, UMR530, CIC 1408 Vaccinology, 42023 Saint-Etienne, France
| | - Martin Killian
- Centre International de Recherche en Infectiologie (CIRI), Team GIMAP, Université de Lyon, Université Claude Bernard Lyon 1, INSERM, U1111, CNRS, UMR530, CIC 1408 Vaccinology, 42023 Saint-Etienne, France
| | - Rémi Gayet
- Centre International de Recherche en Infectiologie (CIRI), Team GIMAP, Université de Lyon, Université Claude Bernard Lyon 1, INSERM, U1111, CNRS, UMR530, CIC 1408 Vaccinology, 42023 Saint-Etienne, France
| | - Roman Goguyer-Deschaumes
- Centre International de Recherche en Infectiologie (CIRI), Team GIMAP, Université de Lyon, Université Claude Bernard Lyon 1, INSERM, U1111, CNRS, UMR530, CIC 1408 Vaccinology, 42023 Saint-Etienne, France
| | - Xavier Roblin
- Centre International de Recherche en Infectiologie (CIRI), Team GIMAP, Université de Lyon, Université Claude Bernard Lyon 1, INSERM, U1111, CNRS, UMR530, CIC 1408 Vaccinology, 42023 Saint-Etienne, France
| | - Gilles Biolley
- R&D Laboratory of the Division of Immunology and Allergy, CHUV, Centre des Laboratoires d'Epalinges, 1066 Epalinges, Switzerland
| | - Blaise Corthésy
- R&D Laboratory of the Division of Immunology and Allergy, CHUV, Centre des Laboratoires d'Epalinges, 1066 Epalinges, Switzerland
| | - Stéphane Paul
- Centre International de Recherche en Infectiologie (CIRI), Team GIMAP, Université de Lyon, Université Claude Bernard Lyon 1, INSERM, U1111, CNRS, UMR530, CIC 1408 Vaccinology, 42023 Saint-Etienne, France.
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2
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Wang S, Wu K, Xue D, Zhang C, Rajput SA, Qi D. Mechanism of deoxynivalenol mediated gastrointestinal toxicity: Insights from mitochondrial dysfunction. Food Chem Toxicol 2021; 153:112214. [PMID: 33930483 DOI: 10.1016/j.fct.2021.112214] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/21/2021] [Accepted: 04/10/2021] [Indexed: 12/12/2022]
Abstract
Deoxynivalenol (DON) is a mycotoxin predominantly produced by Fusarium genus, and widely contaminates cereals and associated products all over the world. The intestinal toxicity of DON is well established. However, intestinal homeostasis involves mitochondria, which has rarely been considered in the context of DON exposure. We summarize the recent knowledge on mitochondria as a key player in maintaining intestinal homeostasis based on their functions in cellular energy metabolism, redox homeostasis, apoptosis, intestinal immune responses, and orchestrated bidirectional cross-talk with gut microbe. In addition, we discuss the pivotal roles of mitochondrial dysfunction in the intestinal toxicity of DON and highlight promising mitochondrial-targeted therapeutics for DON-induced intestinal injury. Recent studies support that the intestinal toxicity of DON is attributed to mitochondrial dysfunction as a critical factor. Mitochondrial dysfunction characterized by failure in respiratory capacities and ROS overproduction has been demonstrated in intestinal cells exposed to DON. Perturbation of mitochondrial respiration leading to ROS accumulation is implicated in the early initiation of apoptosis. DON-induced intestinal inflammatory response is tightly linked to the mitochondrial ROS, whereas immunosuppression is intimately associated with mitophagy inhibition. DON perturbs the orchestrated bidirectional cross-talk between gut microbe and host mitochondria, which may be involved in DON-induced intestinal toxicity.
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Affiliation(s)
- Shuai Wang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
| | - Kuntan Wu
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
| | - Dongfang Xue
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
| | - Cong Zhang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
| | - Shahid Ali Rajput
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
| | - Desheng Qi
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
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3
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Camara-Lemarroy CR, Metz L, Meddings JB, Sharkey KA, Wee Yong V. The intestinal barrier in multiple sclerosis: implications for pathophysiology and therapeutics. Brain 2019; 141:1900-1916. [PMID: 29860380 DOI: 10.1093/brain/awy131] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 03/24/2018] [Indexed: 12/12/2022] Open
Abstract
Biological barriers are essential for the maintenance of homeostasis in health and disease. Breakdown of the intestinal barrier is an essential aspect of the pathophysiology of gastrointestinal inflammatory diseases, such as inflammatory bowel disease. A wealth of recent studies has shown that the intestinal microbiome, part of the brain-gut axis, could play a role in the pathophysiology of multiple sclerosis. However, an essential component of this axis, the intestinal barrier, has received much less attention. In this review, we describe the intestinal barrier as the physical and functional zone of interaction between the luminal microbiome and the host. Besides its essential role in the regulation of homeostatic processes, the intestinal barrier contains the gut mucosal immune system, a guardian of the integrity of the intestinal tract and the whole organism. Gastrointestinal disorders with intestinal barrier breakdown show evidence of CNS demyelination, and content of the intestinal microbiome entering into the circulation can impact the functions of CNS microglia. We highlight currently available studies suggesting that there is intestinal barrier dysfunction in multiple sclerosis. Finally, we address the mechanisms by which commonly used disease-modifying drugs in multiple sclerosis could alter the intestinal barrier and the microbiome, and we discuss the potential of barrier-stabilizing strategies, including probiotics and stabilization of tight junctions, as novel therapeutic avenues in multiple sclerosis.
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Affiliation(s)
- Carlos R Camara-Lemarroy
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Luanne Metz
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Jonathan B Meddings
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Keith A Sharkey
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - V Wee Yong
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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4
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Singh N, Gallagher HC, Song R, Dhinsa JK, Ostroff GR, De Jesus M. RNA isolation from Peyer's patch lymphocytes and mononuclear phagocytes to determine gene expression profiles using NanoString technology. J Biol Methods 2018; 5:e95. [PMID: 31453245 PMCID: PMC6706143 DOI: 10.14440/jbm.2018.246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/28/2018] [Accepted: 03/08/2018] [Indexed: 01/22/2023] Open
Abstract
Sampling and immune surveillance within gut-associated lymphoid tissues such as the intestinal Peyer’s patch (PP) occurs by an elegantly orchestrated effort that involves the epithelial barrier, B and T lymphocytes, and an extensive network of mononuclear phagocytes. Although we now understand more about the dynamics of antigen and microbial sampling within PPs, the gene expression changes that occur in individual cell subsets during sampling are not well characterized. This protocol describes the isolation of high-quality RNA from sorted PP, B and T-lymphocytes, and CD11c+ phagocytes for use with nCounter-NanoString technology. This method allows investigators to study gene expression changes within PPs in response to antigens, microbes, and oral vaccine delivery vehicles of interest that are sampled.
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Affiliation(s)
- Navjot Singh
- Division of Molecular Genetics Wadsworth Center, New York State Department of Health, Albany NY, USA
| | - Heather C Gallagher
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany NY, USA.,Department of Biomedical Sciences, University at Albany, School of Public Health Albany, Albany NY, USA
| | - Renjie Song
- Biochemistry and Immunology Core, Wadsworth Center, New York State Department of Health, Albany NY, USA
| | - Jaskiran K Dhinsa
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany NY, USA.,Division of Molecular Genetics Wadsworth Center, New York State Department of Health, Albany NY, USA
| | - Gary R Ostroff
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Magdia De Jesus
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany NY, USA.,Department of Biomedical Sciences, University at Albany, School of Public Health Albany, Albany NY, USA
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SIgA–Shigella Immune Complexes Interact with Dectin-1 and SIGNR3 to Differentially Regulate Mouse Peyer's Patch and Mesenteric Lymph Node Dendritic Cell's Responsiveness. J Mol Biol 2017; 429:2387-2400. [DOI: 10.1016/j.jmb.2017.05.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/11/2017] [Accepted: 05/27/2017] [Indexed: 12/12/2022]
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6
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Liu M, Wang P, Zhao M, Liu DY. Intestinal Dendritic Cells Are Altered in Number, Maturity and Chemotactic Ability in Fulminant Hepatic Failure. PLoS One 2016; 11:e0166165. [PMID: 27832135 PMCID: PMC5104363 DOI: 10.1371/journal.pone.0166165] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Accepted: 10/23/2016] [Indexed: 01/01/2023] Open
Abstract
Fulminant hepatic failure (FHF) is defined as rapid acute liver injury, often complicated with spontaneous bacterial peritonitis (SBP). The precise onset of FHF with SBP is still unknown, but it is thought that SBP closely correlates with a weakened intestinal barrier. Dendritic cells (DCs) play a crucial role in forming the intestinal immune barrier, therefore the number, maturity and chemotactic ability of intestinal DCs were studied in FHF. Mouse intestinal and spleen DCs were isolated by magnetic-activated cell sorting (MACS) and surface markers of DCs, namely CD11c, CD74, CD83 and CD86, were identified using flow cytometry. Immunohistochemistry and Western blotting were performed to detect the distribution and expression of CC-chemokine receptor 7 (CCR7) and CC-chemokine receptor 9 (CCR9), as well as their ligands-CC-chemokine ligand 21 (CCL21) and CC-chemokine ligand 25 (CCL25). Real-time PCR was used to detect CCR7 and CCR9 mRNA, along with their ligands-CCL21 and CCL25 mRNA. Flow cytometry analysis showed that the markers CD74, CD83 and CD86 of CD11c+DCs were lower in the D-galactosamine (D-GalN) group and were significantly decreased in the FHF group, while there were no significant changes in the expression of these markers in the lipopolysaccharide (LPS) group. Immunohistochemistry results showed that staining for CCR7 and CCR9, as well as their ligands CCL21 and CCL25, was significantly weaker in the D-GalN and FHF groups compared with the normal saline (NS) group or the LPS group; the FHF group even showed completely unstained parts. Protein expression of CCR7 and CCR9, as well as their ligands- CCL21 and CCL25, was also lower in the D-GalN group and decreased even more significantly in the FHF group. At the gene level, CCR7 and CCR9, along with CCL21 and CCL25 mRNA expression, was lower in the D-GalN group and significantly decreased in the FHF group compared to the NS and LPS groups, consisting with the protein expression. Our study indicated that intestinal DCs were decreased in number, maturity and chemotactic ability in FHF and might contribute to a decreased function of the intestinal immune barrier in FHF.
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MESH Headings
- Animals
- Antigens, CD/immunology
- Antigens, CD/metabolism
- Antigens, Differentiation, B-Lymphocyte/immunology
- Antigens, Differentiation, B-Lymphocyte/metabolism
- B7-2 Antigen/immunology
- B7-2 Antigen/metabolism
- Blotting, Western
- CD11c Antigen/immunology
- CD11c Antigen/metabolism
- Cell Count
- Chemokine CCL21/genetics
- Chemokine CCL21/immunology
- Chemokine CCL21/metabolism
- Chemokines, CC/genetics
- Chemokines, CC/immunology
- Chemokines, CC/metabolism
- Chemotaxis/immunology
- Dendritic Cells/immunology
- Dendritic Cells/metabolism
- Flow Cytometry
- Gene Expression/immunology
- Histocompatibility Antigens Class II/immunology
- Histocompatibility Antigens Class II/metabolism
- Immunoglobulins/immunology
- Immunoglobulins/metabolism
- Immunohistochemistry
- Intestines/immunology
- Liver Failure, Acute/genetics
- Liver Failure, Acute/immunology
- Liver Failure, Acute/metabolism
- Male
- Membrane Glycoproteins/immunology
- Membrane Glycoproteins/metabolism
- Mice, Inbred BALB C
- Receptors, CCR/genetics
- Receptors, CCR/immunology
- Receptors, CCR/metabolism
- Receptors, CCR7/genetics
- Receptors, CCR7/immunology
- Receptors, CCR7/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- CD83 Antigen
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Affiliation(s)
- Mei Liu
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang City, Liaoning Province, China
| | - Peng Wang
- The second department of urology, Shengjing Hospital of China Medical University, Shenyang City, Liaoning Province, China
| | - Min Zhao
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang City, Liaoning Province, China
| | - DY Liu
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang City, Liaoning Province, China
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De Jesus M, Rodriguez AE, Yagita H, Ostroff GR, Mantis NJ. Sampling of Candida albicans and Candida tropicalis by Langerin-positive dendritic cells in mouse Peyer's patches. Immunol Lett 2015; 168:64-72. [PMID: 26386376 DOI: 10.1016/j.imlet.2015.09.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 09/10/2015] [Accepted: 09/11/2015] [Indexed: 12/30/2022]
Abstract
Members of the Candida genus, including C. albicans and C. tropicalis are opportunistic fungal pathogens that are increasingly associated with gastrointestinal infections and inflammatory bowel diseases. In healthy populations, however, C. albicans and C. tropicalis are considered benign members of the mycobiome, and are presumably kept in check by the mucosal immune system. In this study, we demonstrate in mice that C. albicans and C. tropicalis are sampled by Peyer's patch (PP) dendritic cells (DCs). Uptake into gut-associated lymphoid tissues occurred rapidly and was at least partly M cell-dependent. C. albicans and C. tropicalis preferentially localized in (and persisted within) a recently identified sub- population of Peyer's patch DCs distinguished by their expression of the C-type lectin receptor, Langerin. This study is the first to identify a subset of PP DCs capable of sampling Candida species.
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Affiliation(s)
- Magdia De Jesus
- Department of Biomedical Sciences, University at Albany, School of Public Health, Albany, NY, USA; Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA.
| | - Adam E Rodriguez
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA; Dutchess Community College, Poughkeepsie, NY, USA
| | - Hideo Yagita
- Department of Immunology, Juntendo University School of Medicine, Tokyo, Japan
| | - Gary R Ostroff
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Nicholas J Mantis
- Department of Biomedical Sciences, University at Albany, School of Public Health, Albany, NY, USA; Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA
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Vorobjova T, Uibo O, Heilman K, Uibo R. Increased density of tolerogenic dendritic cells in the small bowel mucosa of celiac patients. World J Gastroenterol 2015; 21:439-452. [PMID: 25593459 PMCID: PMC4292275 DOI: 10.3748/wjg.v21.i2.439] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 05/15/2014] [Accepted: 07/22/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the densities of dendritic cells (DCs) and FOXP3+ regulatory T cells (Tregs) and their interrelations in the small bowel mucosa in untreated celiac disease (CD) patients with and without type 1 diabetes (T1D).
METHODS: Seventy-four patients (45 female, 29 male, mean age 11.1 ± 6.8 years) who underwent small bowel biopsy were studied. CD without T1D was diagnosed in 18 patients, and CD with T1D was diagnosed in 15 patients. Normal small bowel mucosa was found in two T1D patients. Thirty-nine patients (mean age 12.8 ± 4.9 years) with other diagnoses (functional dyspepsia, duodenal ulcer, erosive gastritis, etc.) formed the control group. All CD patients had partial or subtotal villous atrophy according to the Marsh classification: Marsh grade IIIa in 9, grade IIIb in 21 and grade IIIc in 3 cases. Thirty-nine patients without CD and 2 with T1D had normal small bowel mucosa (Marsh grade 0). The densities of CD11c+, IDO+, CD103+, Langerin (CD207+) DCs and FOXP3+ Tregs were investigated by immunohistochemistry (on paraffin-embedded specimens) and immunofluorescence (on cryostat sections) methods using a combination of mono- and double-staining. Sixty-six serum samples were tested for IgA-tissue transglutaminase (tTG) using a fully automated EliA™ Celikey® IgA assay (Pharmacia Diagnostics, Freiburg, Germany).
RESULTS: The density of CD11c+ DCs was significantly increased in CD patients compared with patients with normal mucosa (21.67 ± 2.49 vs 13.58 ± 1.51, P = 0.007). The numbers of FOXP3+ cells were significantly higher in CD patients (10.66 ± 1.50 vs 1.92 ± 0.37, P = 0.0002) and in patients with CD and coexisting T1D (8.11 ± 1.64 vs 1.92 ± 0.37, P = 0.002) compared with patients with normal mucosa. The density of FOXP3+ cells significantly correlated with the histological grade of atrophic changes in the small bowel mucosa according to the March classification (r = 0.62; P < 0.0001) and with levels of IgA antibody (r = 0.55; P < 0.0001). The densities of IDO+ DCs were significantly higher in CD patients (21.6 ± 2.67 vs 6.26 ± 0.84, P = 0.00003) and in patients with CD and coexisting T1D (19.08 ± 3.61 vs 6.26 ± 0.84, P = 0.004) compared with patients with normal mucosa. A significant correlation was identified between the densities of IDO+ DCs and FOXP3+ T cells (r = 0.76; P = 0.0001). The mean values of CD103+ DCs were significantly higher in CD patients (10.66 ± 1.53 vs 6.34 ± 0.61, P = 0.01) and in patients with CD and associated T1D (11.13 ± 0.72 vs 6.34 ± 0.61, P = 0.00002) compared with subjects with normal small bowel mucosa. The mean value of Langerin+ DCs was higher in CD patients compared with persons with normal mucosa (7.4 ± 0.92 vs 5.64 ± 0.46, P = 0.04).
CONCLUSION: The participation of diverse DC subsets in the pathological processes of CD and the possible involvement of tolerogenic DCs in Tregs development to maintain intestinal immunological tolerance in CD patients are revealed.
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10
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Serotonin 5-HT7 receptor is critically involved in acute and chronic inflammation of the gastrointestinal tract. Inflamm Bowel Dis 2014; 20:1516-29. [PMID: 25072499 DOI: 10.1097/mib.0000000000000150] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Intestinal inflammation is often associated with an increased level of serotonin (5-HT), an important gastrointestinal signaling molecule involved in gut homeostasis through stimulation of specific receptors. In this study, we investigated the role of 5-HT7 receptor (5-HT7R) in the induction and development of intestinal inflammation using a mouse model of acute and chronic colitis and human patients with Crohn's disease (CD). METHODS Acute colitis was induced through administration of dextran sodium sulfate to wild-type, 5-HT7R-deficient mice and hematopoietic bone marrow chimera. Chronic colitis was induced in interleukin 10-deficient mice. The role of 5-HT7R in gut inflammation was assessed using agonist/antagonist treatment. We investigated expression and distribution of 5-HT7R, extent of gut inflammation with magnetic resonance imaging and histological analysis, survival rate, and disease activity index. Finally, biopsies from the large intestine of patients with CD were analyzed. RESULTS Under basal conditions, 5-HT7R is expressed both in enteric neurons and CD11c cells of the large intestine. Expression of 5-HT7R significantly increased after induction of colitis in mice and in inflamed intestinal regions of patients with CD in CD11c/CD86 double-positive cells. Pharmacological blockade or genetic ablation of 5-HT7R resulted in increased severity of both acute and chronic dextran sodium sulfate-induced colitis, whereas receptor stimulation showed an anti-inflammatory effect. Analysis of bone marrow chimera indicated importance of 5-HT7R expressed by hematopoietic cells in intestinal inflammation. CONCLUSIONS The 5-HT7R expressed on CD11c/CD86-positive myeloid cells modulates the severity of intestinal inflammation in an acute and chronic colitis and thus represents a potential therapeutic target for the treatment of inflammatory disorders such as CD.
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11
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De Jesus M, Ostroff GR, Levitz SM, Bartling TR, Mantis NJ. A population of Langerin-positive dendritic cells in murine Peyer's patches involved in sampling β-glucan microparticles. PLoS One 2014; 9:e91002. [PMID: 24632738 PMCID: PMC3954581 DOI: 10.1371/journal.pone.0091002] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 02/07/2014] [Indexed: 12/19/2022] Open
Abstract
Glucan particles (GPs) are 2–4 μm hollow, porous shells composed of 1,3-β-D-glucan that have been effectively used for oral targeted–delivery of a wide range of payloads, including small molecules, siRNA, DNA, and protein antigens. While it has been demonstrated that the transepithelial transport of GPs is mediated by Peyer's patch M cells, the fate of the GPs once within gut-associated lymphoid tissue (GALT) is not known. Here we report that fluorescently labeled GPs administered to mice by gavage accumulate in CD11c+ DCs situated in Peyer's patch sub-epithelial dome (SED) regions. GPs appeared in DCs within minutes after gavage and remained within the SED for days afterwards. The co-administration or sequential administration of GPs with differentially labeled GPs or poly(lactic-co-glycolic acid) nanoparticles demonstrated that the SED DC subpopulation in question was capable of internalizing particles of different sizes and material compositions. Phenotypic analysis identified the GP-containing DCs as being CD8α- and CD11blo/-, suggesting they are the so-called myeloid and/or double negative (DN) subset(s) of PP DCs. A survey of C-type lectin receptors (CLRs) known to be expressed by leukocytes within the intestinal mucosa revealed that GP-containing SED DCs were positive for Langerin (CD207), a CLR with specificity for β-D-glucan and that has been shown to mediate the internalization of a wide range of microbial pathogens, including bacteria, viruses and fungi. The presence of Langerin+ DCs in the SED as determined by immunofluorescence was confirmed using Langerin E-GFP transgenic mice. In summary, our results demonstrate that following M cell-mediated transepithelial transport, GPs (and other micro/nanoparticles) are sampled by a population of SED DCs distinguished from other Peyer's patch DC subsets by their expression of Langerin. Future studies will be aimed at defining the role of Langerin in antigen sampling and antigen presentation within the context of the GALT.
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Affiliation(s)
- Magdia De Jesus
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, New York, United States of America
| | - Gary R. Ostroff
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Stuart M. Levitz
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Toni R. Bartling
- College of Nanoscale Sciences and Engineering, State University of New York, Albany, New York, United States of America
| | - Nicholas J. Mantis
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, New York, United States of America
- Department of Biomedical Sciences, University at Albany, Albany, New York, United States of America
- * E-mail:
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12
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Rochereau N, Drocourt D, Perouzel E, Pavot V, Redelinghuys P, Brown GD, Tiraby G, Roblin X, Verrier B, Genin C, Corthésy B, Paul S. Dectin-1 is essential for reverse transcytosis of glycosylated SIgA-antigen complexes by intestinal M cells. PLoS Biol 2013; 11:e1001658. [PMID: 24068891 PMCID: PMC3775721 DOI: 10.1371/journal.pbio.1001658] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 08/08/2013] [Indexed: 01/27/2023] Open
Abstract
This work reports the long-awaited identification of Dectin-1 and Siglec-5 as the M cell co-receptors that mediate the reverse transcytosis of secretory IgA molecules to mount a gut immune response. Intestinal microfold (M) cells possess a high transcytosis capacity and are able to transport a broad range of materials including particulate antigens, soluble macromolecules, and pathogens from the intestinal lumen to inductive sites of the mucosal immune system. M cells are also the primary pathway for delivery of secretory IgA (SIgA) to the gut-associated lymphoid tissue. However, although the consequences of SIgA uptake by M cells are now well known and described, the mechanisms whereby SIgA is selectively bound and taken up remain poorly understood. Here we first demonstrate that both the Cα1 region and glycosylation, more particularly sialic acid residues, are involved in M cell–mediated reverse transcytosis. Second, we found that SIgA is taken up by M cells via the Dectin-1 receptor, with the possible involvement of Siglec-5 acting as a co-receptor. Third, we establish that transcytosed SIgA is taken up by mucosal CX3CR1+ dendritic cells (DCs) via the DC-SIGN receptor. Fourth, we show that mucosal and systemic antibody responses against the HIV p24-SIgA complexes administered orally is strictly dependent on the expression of Dectin-1. Having deciphered the mechanisms leading to specific targeting of SIgA-based Ag complexes paves the way to the use of such a vehicle for mucosal vaccination against various infectious diseases. Secretory IgA (SIgA) antibodies are secreted into the gut lumen and are considered to be a first line of defense in protecting the intestinal epithelium from gut pathogens. SIgA patrol the mucus and are usually known to help immune tolerance via entrapping dietary antigens and microorganisms and other mechanisms. SIgA, in complex with its antigens, can also be taken back up by the intestinal epithelium in a process known as reverse transcytosis. SIgA can thereby promote the uptake and delivery of antigens from the intestinal lumen to the Gut-Associated Lymphoid Tissues (GALT), influencing inflammatory responses. This reverse transcytosis of SIgA is mediated by specialized epithelial M cells. Because M cells possess the ability to take up antigens and are therefore important to the local immune system, they are a key target for the specific delivery of novel mucosal vaccines against various diseases. M cell receptors that take up the SIgA-antigen complexes, which serve as mucosal vaccine vehicles, represent an important aspect of this vaccine strategy. The identification of SIgA receptor(s) on the surface of M cells has, however, remained elusive for more than a decade. In this study, we now identify Dectin-1 and Siglec-5 as the key receptors for M cell–mediated reverse transcytosis of SIgA complexes. We further find that the glycosylation modification, and particularly sialylation, of SIgA is required for its uptake by M cells. We show that, when administered orally in complex with SIgA, the HIV p24 antigen is taken up in a strictly Dectin-1-dependent manner to stimulate a mucosal and systemic antibody response. These findings are considered important for understanding gut immunity.
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MESH Headings
- Animals
- Antigen-Antibody Complex/immunology
- Antigen-Antibody Complex/metabolism
- Antigens, CD/metabolism
- Antigens, Differentiation, Myelomonocytic/metabolism
- CHO Cells
- CX3C Chemokine Receptor 1
- Caco-2 Cells
- Cell Adhesion Molecules/metabolism
- Cell Line
- Cricetulus
- Dendritic Cells/immunology
- Dendritic Cells/metabolism
- Glycosylation
- HIV Core Protein p24/immunology
- HeLa Cells
- Humans
- Immunoglobulin A/immunology
- Immunoglobulin A, Secretory/immunology
- Intestinal Mucosa/cytology
- Intestinal Mucosa/immunology
- Intestinal Mucosa/metabolism
- Intestines/cytology
- Lectins/metabolism
- Lectins, C-Type/biosynthesis
- Lectins, C-Type/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- N-Acetylneuraminic Acid/chemistry
- Receptors, Cell Surface/metabolism
- Receptors, Chemokine/metabolism
- Transcytosis/immunology
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Affiliation(s)
- Nicolas Rochereau
- GIMAP/EA3064, INSERM CIE3 Vaccinology, Université de Lyon, Saint-Etienne, France
| | | | | | - Vincent Pavot
- Institut de Biologie et Chimie des Protéines, FRE3310/CNRS, Université de Lyon, France
| | - Pierre Redelinghuys
- Section of Infection and Immunity, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Gordon D. Brown
- Section of Infection and Immunity, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | | | - Xavier Roblin
- GIMAP/EA3064, INSERM CIE3 Vaccinology, Université de Lyon, Saint-Etienne, France
| | - Bernard Verrier
- Institut de Biologie et Chimie des Protéines, FRE3310/CNRS, Université de Lyon, France
| | - Christian Genin
- GIMAP/EA3064, INSERM CIE3 Vaccinology, Université de Lyon, Saint-Etienne, France
| | - Blaise Corthésy
- R&D Laboratory of the Division of Immunology and Allergy, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Stéphane Paul
- GIMAP/EA3064, INSERM CIE3 Vaccinology, Université de Lyon, Saint-Etienne, France
- * E-mail:
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Yan H, Ohno N, Tsuji NM. The role of C-type lectin receptors in immune homeostasis. Int Immunopharmacol 2013; 16:353-7. [DOI: 10.1016/j.intimp.2013.04.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 04/01/2013] [Indexed: 12/19/2022]
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