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Wichmann C, Wirthgen E, Nowosad CR, Däbritz J. B cell academy of the gut: an update on gut associated germinal centre B cell dynamics. Mol Cell Pediatr 2024; 11:7. [PMID: 39147924 PMCID: PMC11327226 DOI: 10.1186/s40348-024-00180-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2024] [Accepted: 08/07/2024] [Indexed: 08/17/2024] Open
Abstract
BACKGROUND The gut is an environment in which the immune system closely interacts with a vast number of foreign antigens, both inert such as food and alive, from the viral, bacterial, fungal and protozoal microbiota. Within this environment, germinal centres, which are microanatomical structures where B cells affinity-mature, are chronically present and active. MAIN BODY The functional mechanism by which gut-associated germinal centres contribute to gut homeostasis is not well understood. Additionally, the role of T cells in class switching to immunoglobulin A and the importance of B cell affinity maturation in homeostasis remains elusive. Here, we provide a brief overview of the dynamics of gut-associated germinal centres, T cell dependency in Immunoglobulin A class switching, and the current state of research regarding the role of B cell selection in germinal centres in the gut under steady-state conditions in gnotobiotic mouse models and complex microbiota, as well as in response to immunization and microbial colonization. Furthermore, we briefly link those processes to immune system maturation and relevant diseases. CONCLUSION B cell response at mucosal surfaces consists of a delicate interplay of many dynamic factors, including the microbiota and continuous B cell influx. The rapid turnover within gut-associated germinal centres and potential influences of an early-life window of immune system imprinting complicate B cell dynamics in the gut.
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Affiliation(s)
- Christopher Wichmann
- Department of Paediatrics, Greifswald University Medical Centre, Ferdinand-Sauerbruch-Str.1, Greifswald, MV, 17457, Germany
- The David Rockefeller Graduate Program in Bioscience, The Rockefeller University, New York, NY, USA
| | - Elisa Wirthgen
- Department of Paediatrics, Rostock University Medical Centre, Rostock, MV, Germany
| | - Carla R Nowosad
- Department of Pathology, NYU Langone Grossman School of Medicine, New York University, New York, NY, USA
| | - Jan Däbritz
- Department of Paediatrics, Greifswald University Medical Centre, Ferdinand-Sauerbruch-Str.1, Greifswald, MV, 17457, Germany.
- German Centre for Child and Adolescent Health (DZKJ), Site Greifswald/Rostock, Greifswald, MV, Germany.
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Hernández-Urbán AJ, Drago-Serrano ME, Reséndiz-Albor AA, Sierra-Ramírez JA, Guzmán-Mejía F, Oros-Pantoja R, Godínez-Victoria M. Moderate Aerobic Exercise Induces Homeostatic IgA Generation in Senile Mice. Int J Mol Sci 2024; 25:8200. [PMID: 39125769 PMCID: PMC11311420 DOI: 10.3390/ijms25158200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/22/2024] [Accepted: 07/24/2024] [Indexed: 08/12/2024] Open
Abstract
A T-cell-independent (TI) pathway activated by microbiota results in the generation of low-affinity homeostatic IgA with a critical role in intestinal homeostasis. Moderate aerobic exercise (MAE) provides a beneficial impact on intestinal immunity, but the action of MAE on TI-IgA generation under senescence conditions is unknown. This study aimed to determine the effects of long-term MAE on TI-IgA production in young (3 month old) BALB/c mice exercised until adulthood (6 months) or aging (24 months). Lamina propria (LP) from the small intestine was obtained to determine B cell and plasma cell sub-populations by flow cytometry and molecular factors related to class switch recombination [Thymic Stromal Lymphopoietin (TSLP), A Proliferation-Inducing Ligand (APRIL), B Cell Activating Factor (BAFF), inducible nitric oxide synthase (iNOS), and retinal dehydrogenase (RDH)] and the synthesis of IgA [α-chain, interleukin (IL)-6, IL-21, and Growth Factor-β (TGF-β)]; and epithelial cells evaluated IgA transitosis [polymeric immunoglobulin receptor (pIgR), tumor necrosis factor-α (TNF-α), interferon-γ (IFN-γ), IL-4] by the RT-qPCR technique. The results were compared with data obtained from sedentary age-matched mice. Statistical analysis was computed with ANOVA, and p < 0.05 was considered to be a statistically significant difference. Under senescence conditions, MAE promoted the B cell and IgA+ B cells and APRIL, which may improve the intestinal response and ameliorate the inflammatory environment associated presumably with the downmodulation of pro-inflammatory mediators involved in the upmodulation of pIgR expression. Data suggested that MAE improved IgA and downmodulate the cytokine pro-inflammatory expression favoring homeostatic conditions in aging.
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Affiliation(s)
- Angel J. Hernández-Urbán
- Laboratorio de Citometría de Flujo, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico;
| | - Maria-Elisa Drago-Serrano
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Unidad Xochimilco, Mexico City 04960, Mexico; (M.-E.D.-S.); (F.G.-M.)
| | - Aldo A. Reséndiz-Albor
- Laboratorio de Inmunidad de Mucosas, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico;
| | - José A. Sierra-Ramírez
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico;
| | - Fabiola Guzmán-Mejía
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Unidad Xochimilco, Mexico City 04960, Mexico; (M.-E.D.-S.); (F.G.-M.)
| | - Rigoberto Oros-Pantoja
- Laboratorio de Neuroinmunoendocrinología, Facultad de Medicina, Universidad Autónoma del Estado de México, Toluca 50180, Mexico;
| | - Marycarmen Godínez-Victoria
- Laboratorio de Citometría de Flujo, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico;
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3
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Siniscalco ER, Williams A, Eisenbarth SC. All roads lead to IgA: Mapping the many pathways of IgA induction in the gut. Immunol Rev 2024. [PMID: 39046160 DOI: 10.1111/imr.13369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
The increasing prevalence of food allergy and related pathologies in recent years has underscored the need to understand the factors affecting adverse reactions to food. Food allergy is caused when food-specific IgE triggers the release of histamine from mast cells. However, other food-specific antibody isotypes exist as well, including IgG and IgA. IgA is the main antibody isotype in the gut and mediates noninflammatory reactions to toxins, commensal bacteria, and food antigens. It has also been thought to induce tolerance to food, thus antagonizing the role of food-specific IgE. However, this has remained unclear as food-specific IgA generation is poorly understood. Particularly, the location of IgA induction, the role of T cell help, and the fates of food-specific B cells remain elusive. In this review, we outline what is known about food-specific IgA induction and highlight areas requiring further study. We also explore how knowledge of food-specific IgA induction can be informed by and subsequently contribute to our overall knowledge of gut immunity.
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Affiliation(s)
- Emily R Siniscalco
- Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, USA
- Center for Human Immunobiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Adam Williams
- Center for Human Immunobiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Division of Allergy and Immunology, The Department Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Stephanie C Eisenbarth
- Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, USA
- Center for Human Immunobiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Division of Allergy and Immunology, The Department Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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4
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Tian K, Jing D, Lan J, Lv M, Wang T. Commensal microbiome and gastrointestinal mucosal immunity: Harmony and conflict with our closest neighbor. Immun Inflamm Dis 2024; 12:e1316. [PMID: 39023417 PMCID: PMC11256888 DOI: 10.1002/iid3.1316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 05/06/2024] [Accepted: 06/03/2024] [Indexed: 07/20/2024] Open
Abstract
BACKGROUND The gastrointestinal tract contains a wide range of microorganisms that have evolved alongside the immune system of the host. The intestinal mucosa maintains balance within the intestines by utilizing the mucosal immune system, which is controlled by the complex gut mucosal immune network. OBJECTIVE This review aims to comprehensively introduce current knowledge of the gut mucosal immune system, focusing on its interaction with commensal bacteria. RESULTS The gut mucosal immune network includes gut-associated lymphoid tissue, mucosal immune cells, cytokines, and chemokines. The connection between microbiota and the immune system occurs through the engagement of bacterial components with pattern recognition receptors found in the intestinal epithelium and antigen-presenting cells. This interaction leads to the activation of both innate and adaptive immune responses. The interaction between the microbial community and the host is vital for maintaining the balance and health of the host's mucosal system. CONCLUSION The gut mucosal immune network maintains a delicate equilibrium between active immunity, which defends against infections and damaging non-self antigens, and immunological tolerance, which allows for the presence of commensal microbiota and dietary antigens. This balance is crucial for the maintenance of intestinal health and homeostasis. Disturbance of gut homeostasis leads to enduring or severe gastrointestinal ailments, such as colorectal cancer and inflammatory bowel disease. Utilizing these factors can aid in the development of cutting-edge mucosal vaccines that have the ability to elicit strong protective immune responses at the primary sites of pathogen invasion.
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Affiliation(s)
- Kexin Tian
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical SchoolNanjing UniversityNanjingChina
- Jiangsu Key Laboratory of Molecular Medicine, Division of Immunology, Medical SchoolNanjing UniversityNanjingChina
| | - Dehong Jing
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical SchoolNanjing UniversityNanjingChina
- Jiangsu Key Laboratory of Molecular Medicine, Division of Immunology, Medical SchoolNanjing UniversityNanjingChina
| | - Junzhe Lan
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical SchoolNanjing UniversityNanjingChina
- Jiangsu Key Laboratory of Molecular Medicine, Division of Immunology, Medical SchoolNanjing UniversityNanjingChina
| | - Mingming Lv
- Department of BreastWomen's Hospital of Nanjing Medical University, Nanjing Maternity, and Child Health Care HospitalNanjingChina
| | - Tingting Wang
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical SchoolNanjing UniversityNanjingChina
- Jiangsu Key Laboratory of Molecular Medicine, Division of Immunology, Medical SchoolNanjing UniversityNanjingChina
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5
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Verma S, Dufort MJ, Olsen TM, Kimmel S, Labuda JC, Scharffenberger S, McGuire AT, Harrison OJ. Antigen-level resolution of commensal-specific B cell responses can be enabled by phage display screening coupled with B cell tetramers. Immunity 2024; 57:1428-1441.e8. [PMID: 38723638 PMCID: PMC11168869 DOI: 10.1016/j.immuni.2024.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 02/07/2024] [Accepted: 04/16/2024] [Indexed: 06/14/2024]
Abstract
Induction of commensal-specific immunity contributes to tissue homeostasis, yet the mechanisms underlying induction of commensal-specific B cells remain poorly understood in part due to a lack of tools to identify these cells. Using phage display, we identified segmented filamentous bacteria (SFB) antigens targeted by serum and intestinal antibodies and generated B cell tetramers to track SFB-specific B cells in gut-associated lymphoid tissues. We revealed a compartmentalized response in SFB-specific B cell activation, with a gradient of immunoglobulin A (IgA), IgG1, and IgG2b isotype production along Peyer's patches contrasted by selective production of IgG2b within mesenteric lymph nodes. V(D)J sequencing and monoclonal antibody generation identified somatic hypermutation driven affinity maturation to SFB antigens under homeostatic conditions. Combining phage display and B cell tetramers will enable investigation of the ontogeny and function of commensal-specific B cell responses in tissue immunity, inflammation, and repair.
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Affiliation(s)
- Sheenam Verma
- Center for Fundamental Immunology, Benaroya Research Institute, Seattle, WA, USA
| | - Matthew J Dufort
- Center for Systems Immunology, Benaroya Research Institute, Seattle, WA, USA
| | - Tayla M Olsen
- Center for Fundamental Immunology, Benaroya Research Institute, Seattle, WA, USA; Molecular and Cellular Biology Program, University of Washington, Seattle, WA, USA
| | - Samantha Kimmel
- Center for Fundamental Immunology, Benaroya Research Institute, Seattle, WA, USA
| | - Jasmine C Labuda
- Center for Fundamental Immunology, Benaroya Research Institute, Seattle, WA, USA
| | - Sam Scharffenberger
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Andrew T McGuire
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Department of Global Health, University of Washington, Seattle, WA, USA; Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Oliver J Harrison
- Center for Fundamental Immunology, Benaroya Research Institute, Seattle, WA, USA; Molecular and Cellular Biology Program, University of Washington, Seattle, WA, USA; Department of Immunology, University of Washington, Seattle, WA, USA.
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6
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Pecha B, Martinez S, Milburn LJ, Rojas OL, Koch MA. Identification of Intestinal Lamina Propria Plasma Cells by Surface Transmembrane Activator and CAML Interactor Expression. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:1022-1028. [PMID: 38294253 PMCID: PMC10932850 DOI: 10.4049/jimmunol.2300132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 01/08/2024] [Indexed: 02/01/2024]
Abstract
Plasma cells secrete an abundance of Abs and are a crucial component of our immune system. The intestinal lamina propria harbors the largest population of plasma cells, most of which produce IgA. These Abs can bind to beneficial gut bacteria to reinforce intestinal homeostasis and provide protection against enteric pathogens. Plasma cells downregulate many cell-surface proteins commonly used to identify B cells. In mice, expression of the surface marker CD138 has been widely used to identify plasma cells in lymph nodes, bone marrow, and spleen. Intestinal plasma cells require liberation via extensive tissue processing involving treatment with collagenase. We report that detection of CD138 surface expression is reduced following collagenase treatment. Using a mouse in which yellow fluorescent protein expression is controlled by the plasma cell requisite transcription factor Blimp-1, we show that surface detection of transmembrane activator and CAML interactor captures a significant proportion of Ab-secreting plasma cells in the intestinal lamina propria and gut-draining mesenteric lymph nodes. Additionally, we describe a flow cytometry panel based on the detection of surface markers to identify murine B cell subsets in the intestinal lamina propria and, as a proof of concept, combine it with a cutting-edge fate-tracking system to characterize the fate of germinal center B cells activated in early life. By identifying plasma cells and other key intestinal B subsets in a manner compatible with several downstream applications, including sorting and culturing and in vitro manipulations, this efficient and powerful approach can enhance studies of mucosal immunity.
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Affiliation(s)
- Bingjie Pecha
- Basic Sciences Division, Fred Hutchinson Cancer Center, Seattle, WA
- Molecular and Cellular Biology Program, University of Washington, Seattle, WA
- Medical Scientist Training Program, University of Washington, Seattle, WA
| | | | - Luke J Milburn
- Basic Sciences Division, Fred Hutchinson Cancer Center, Seattle, WA
| | - Olga L Rojas
- Division of Experimental and Translational Neuroscience, Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Meghan A Koch
- Basic Sciences Division, Fred Hutchinson Cancer Center, Seattle, WA
- Department of Immunology, University of Washington, Seattle, WA
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7
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Bemark M, Pitcher MJ, Dionisi C, Spencer J. Gut-associated lymphoid tissue: a microbiota-driven hub of B cell immunity. Trends Immunol 2024; 45:211-223. [PMID: 38402045 PMCID: PMC11227984 DOI: 10.1016/j.it.2024.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 01/29/2024] [Accepted: 01/30/2024] [Indexed: 02/26/2024]
Abstract
The diverse gut microbiota, which is associated with mucosal health and general wellbeing, maintains gut-associated lymphoid tissues (GALT) in a chronically activated state, including sustainment of germinal centers in a context of high antigenic load. This influences the rules for B cell engagement with antigen and the potential consequences. Recent data have highlighted differences between GALT and other lymphoid tissues. For example, GALT propagates IgA responses against glycans that show signs of having been generated in germinal centers. Other findings suggest that humans are among those species where GALT supports the diversification, propagation, and possibly selection of systemic B cells. Here, we review novel findings that identify GALT as distinctive, and able to support these processes.
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Affiliation(s)
- Mats Bemark
- Department of Translational Medicine - Human Immunology, Lund University, J Waldenströms gata 35, Malmö, Sweden; Department of Clinical Immunology and Transfusion Medicine, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden.
| | - Michael J Pitcher
- Peter Gorer Department of Immunobiology, King's College London, Guy's Hospital Campus, St Thomas' Street, London SE1 9RT, UK
| | - Chiara Dionisi
- Peter Gorer Department of Immunobiology, King's College London, Guy's Hospital Campus, St Thomas' Street, London SE1 9RT, UK
| | - Jo Spencer
- Peter Gorer Department of Immunobiology, King's College London, Guy's Hospital Campus, St Thomas' Street, London SE1 9RT, UK.
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8
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Sorini C, Cardoso RF, Tripathi KP, Mold JE, Diaz OE, Holender Y, Kern BC, Czarnewski P, Gagliani N, Villablanca EJ. Intestinal damage is required for the pro-inflammatory differentiation of commensal CBir1-specific T cells. Mucosal Immunol 2024; 17:81-93. [PMID: 37952848 DOI: 10.1016/j.mucimm.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 11/14/2023]
Abstract
Commensal-specific clusters of differentiation (CD)4+ T cells are expanded in patients with inflammatory bowel disease (IBD) compared to healthy individuals. How and where commensal-specific CD4+ T cells get activated is yet to be fully understood. We used CBir1 TCR-transgenic CD4+ T cells, specific to a commensal bacterial antigen, and different mouse models of IBD to characterize the dynamics of commensal-specific CD4+ T-cells activation. We found that CBir1 T cells proliferate following intestinal damage and cognate antigen presentation is mediated by CD11c+ cells in the colon-draining mesenteric lymph nodes. Using assay for transposase-accessible chromatin sequencing and flow cytometry, we showed that activated CBir1 T cells preferentially acquire an effector rather than regulatory phenotype, which is plastic over time. Moreover, CBir1 T cells, while insufficient to initiate intestinal inflammation, contributed to worse disease outcomes in the presence of other CD4+ T cells. Our results suggest that the commensal-specific T-cell responses observed in IBD exacerbate rather than initiate disease.
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Affiliation(s)
- Chiara Sorini
- Department of Medicine, Solna, Division of Immunology and Allergy, Karolinska Institute, Center for Molecular Medicine, Stockholm, Sweden.
| | - Rebeca F Cardoso
- Department of Medicine, Solna, Division of Immunology and Allergy, Karolinska Institute, Center for Molecular Medicine, Stockholm, Sweden
| | - Kumar P Tripathi
- Department of Medicine, Solna, Division of Immunology and Allergy, Karolinska Institute, Center for Molecular Medicine, Stockholm, Sweden
| | - Jeff E Mold
- Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
| | - Oscar E Diaz
- Department of Medicine, Solna, Division of Immunology and Allergy, Karolinska Institute, Center for Molecular Medicine, Stockholm, Sweden
| | - Yael Holender
- Department of Medicine, Solna, Division of Immunology and Allergy, Karolinska Institute, Center for Molecular Medicine, Stockholm, Sweden
| | - Bianca C Kern
- Department of Medicine, Solna, Division of Immunology and Allergy, Karolinska Institute, Center for Molecular Medicine, Stockholm, Sweden
| | - Paulo Czarnewski
- Department of Medicine, Solna, Division of Immunology and Allergy, Karolinska Institute, Center for Molecular Medicine, Stockholm, Sweden
| | - Nicola Gagliani
- Department of Medicine, Solna, Division of Immunology and Allergy, Karolinska Institute, Center for Molecular Medicine, Stockholm, Sweden; Hamburg Center for Translational Immunology (HCTI), I. Department of Medicine and Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Eduardo J Villablanca
- Department of Medicine, Solna, Division of Immunology and Allergy, Karolinska Institute, Center for Molecular Medicine, Stockholm, Sweden
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Budeus B, Kibler A, Küppers R. Human IgM-expressing memory B cells. Front Immunol 2023; 14:1308378. [PMID: 38143767 PMCID: PMC10748387 DOI: 10.3389/fimmu.2023.1308378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 11/27/2023] [Indexed: 12/26/2023] Open
Abstract
A hallmark of T cell dependent (TD) humoral immune responses is the generation of long-lived memory B cells. The generation of these cells occurs primarily in the germinal center (GC) reaction, where antigen-activated B cells undergo affinity maturation as a major consequence of the combined processes of proliferation, somatic hypermutation of their immunoglobulin V (IgV) region genes, and selection for improved affinity of their B-cell antigen receptors. As many B cells also undergo class-switching to IgG or IgA in these TD responses, there was traditionally a focus on class-switched memory B cells in both murine and human studies on memory B cells. However, it has become clear that there is also a large subset of IgM-expressing memory B cells, which have important phenotypic and functional similarities but also differences to class-switched memory B cells. There is an ongoing discussion about the origin of distinct subsets of human IgM+ B cells with somatically mutated IgV genes. We argue here that the vast majority of human IgM-expressing B cells with somatically mutated IgV genes in adults is indeed derived from GC reactions, even though a generation of some mostly lowly mutated IgM+ B cells from other differentiation pathways, mainly in early life, may exist.
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Affiliation(s)
| | | | - Ralf Küppers
- Institute of Cell Biology (Cancer Research), Medical Faculty, University of Duisburg–Essen, Essen, Germany
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10
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Hernández-Urbán AJ, Drago-Serrano ME, Cruz-Baquero A, García-Hernández AL, Arciniega-Martínez IM, Pacheco-Yépez J, Guzmán-Mejía F, Godínez-Victoria M. Exercise improves intestinal IgA production by T-dependent cell pathway in adults but not in aged mice. Front Endocrinol (Lausanne) 2023; 14:1190547. [PMID: 38130396 PMCID: PMC10733478 DOI: 10.3389/fendo.2023.1190547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 11/17/2023] [Indexed: 12/23/2023] Open
Abstract
Introduction Hypermutated high-affinity immunoglobulin A (IgA), neutralizes toxins and drives the diversification of bacteria communities to maintain intestinal homeostasis although the mechanism underlies the impact of moderate aerobic exercise (MAE) on the IgA-generation via T-dependent (TD) is not fully know. Therefore, the aim of this study was to determine the effect of long-time MAE on the production of IgA through the TD pathway in Peyer´s patches of the small intestine from aged mice. Methods MAE protocol consisted of twenty 3-month-old (young) BALB/c mice running in an endless band at 0° inclination and a speed of 10 m/h for 5 days a week and resting 2 days on the weekend until reaching 6-month-old (adulthood, n=10) or 24-month-old (aging, n=10). Groups of young, adult, or elderly mice were included as sedentary controls (n=10/per group). At 6 or 24 months old, all were sacrificed, and small intestine samples were dissected to prepare intestinal lavages for IgA quantitation by ELISA and to obtain suspensions from Peyer´s patches (PP) and lamina propria (LP) cells for analysis of T, B, and plasma cell subpopulations by flow cytometry and mRNA analysis expression by RT-qPCR of molecular factors related to differentiation of B cells to IgA+ plasma cells, class switch recombination, and IgA-synthesis. Statistical analysis was computed with two-way ANOVA (factor A=age, factor B=group) and p<0.05 was considered for statistically significant differences. Results Compared to age-matched sedentary control, in exercised elderly mice, parameters were either increased (IgA concentration, IL-21, IL-10 and RDH mRNA expression), decreased (α-chain mRNA, B cells, mIgA+ B cells, mIgM+ B cells and IL-4 mRNA) or unchanged (PP mIgA+ plasmablasts and LP cyt-IgA+ plasma cells). Regarding the exercised adult mice, they showed an up-modulation of IgA-concentration, mRNA expression IL-21, IL-10, and RDH and cells (PP B and T cells, mIgM+ plasmablasts and LP cyt-IgA+plasma cells). Conclusion Our findings suggest that MAE restored the IgA production in adult mice via the TD cell pathway but does not in aged mice. Other studies are necessary to know in more detail the impact of long-time MAE on the TD pathway to produce IgA in aging.
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Affiliation(s)
- Angel Joel Hernández-Urbán
- Laboratorio de Citometria de Flujo e Investigación en Inmunología Clínica, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Maria Elisa Drago-Serrano
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Unidad Xochimilco, Mexico City, Mexico
| | - Andrea Cruz-Baquero
- Laboratorio de Inmunología en Enfermedades Infecciosas, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City, Mexico
- Programa Bacteriología y Laboratorio Clínico, Facultad de Ciencias de la Salud, Universidad Colegio Mayor de Cundinamarca, Bogotá, Colombia
| | - Ana Lilia García-Hernández
- Laboratorio de Investigación Odontológica, Sección Osteoinmunologia e Inmunidad Oral, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de Mexico, Mexico City, Mexico
| | - Ivonne Maciel Arciniega-Martínez
- Laboratorio de Inmunonutrición, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Judith Pacheco-Yépez
- Laboratorio de Inmunología en Enfermedades Infecciosas, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Fabiola Guzmán-Mejía
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Unidad Xochimilco, Mexico City, Mexico
| | - Marycarmen Godínez-Victoria
- Laboratorio de Citometria de Flujo e Investigación en Inmunología Clínica, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City, Mexico
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11
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Viney M, Cheynel L. Gut immune responses and evolution of the gut microbiome-a hypothesis. DISCOVERY IMMUNOLOGY 2023; 2:kyad025. [PMID: 38567055 PMCID: PMC10917216 DOI: 10.1093/discim/kyad025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/03/2023] [Accepted: 11/22/2023] [Indexed: 04/04/2024]
Abstract
The gut microbiome is an assemblage of microbes that have profound effects on their hosts. The composition of the microbiome is affected by bottom-up, among-taxa interactions and by top-down, host effects, which includes the host immune response. While the high-level composition of the microbiome is generally stable over time, component strains and genotypes will constantly be evolving, with both bottom-up and top-down effects acting as selection pressures, driving microbial evolution. Secretory IgA is a major feature of the gut's adaptive immune response, and a substantial proportion of gut bacteria are coated with IgA, though the effect of this on bacteria is unclear. Here we hypothesize that IgA binding to gut bacteria is a selection pressure that will drive the evolution of IgA-bound bacteria, so that they will have a different evolutionary trajectory than those bacteria not bound by IgA. We know very little about the microbiome of wild animals and even less about their gut immune responses, but it must be a priority to investigate this hypothesis to understand if and how host immune responses contribute to microbiome evolution.
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Affiliation(s)
- Mark Viney
- Department of Evolution, Ecology & Behaviour, University of Liverpool, Liverpool, UK
| | - Louise Cheynel
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, Villeurbanne, France
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12
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Bamias G, Kitsou K, Rivera-Nieves J. The Underappreciated Role of Secretory IgA in IBD. Inflamm Bowel Dis 2023; 29:1327-1341. [PMID: 36943800 PMCID: PMC10393212 DOI: 10.1093/ibd/izad024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Indexed: 03/23/2023]
Abstract
Eighty percent of antibody secreting cells (ASCs) are found in the intestine, where they produce grams of immunoglobulin (Ig) A daily. immunoglobulin A is actively transcytosed into the lumen, where it plays a critical role in modulating the gut microbiota. Although loss of immune tolerance to bacterial antigens is the likely trigger of the dysregulated immune response that characterizes inflammatory bowel disease (IBD), little effort has been placed on understanding the interface between B cells, IgA, and the microbiota during initiation or progression of disease. This may be in part due to the misleading fact that IgA-deficient humans are mostly asymptomatic, likely due to redundant role of secretory (S) IgM. Intestinal B cell recruitment is critically dependent on integrin α4β7-MAdCAM-1 interactions, yet antibodies that target α4β7 (ie, vedolizumab), MAdCAM-1 (ie, ontamalimab), or both β7 integrins (α4β7 and αE [CD103] β7; etrolizumab) are in clinical use or development as IBD therapeutics. The effect of such interventions on the biology of IgA is largely unknown, yet a single dose of vedolizumab lowers SIgA levels in stool and weakens the oral immunization response to cholera vaccine in healthy volunteers. Thus, it is critical to further understand the role of these integrins for the migration of ASC and other cellular subsets during homeostasis and IBD-associated inflammation and the mode of action of drugs that interfere with this traffic. We have recently identified a subset of mature ASC that employs integrin αEβ7 to dock with intestinal epithelial cells, predominantly in the pericryptal region of the terminal ileum. This role for the integrin had not been appreciated previously, nor the αEβ7-dependent mechanism of IgA transcytosis that it supports. Furthermore, we find that B cells more than T cells are critically dependent on α4β7-MAdCAM-1 interactions; thus MAdCAM-1 blockade and integrin-β7 deficiency counterintuitively hasten colitis in interleukin-10-deficient mice. In both cases, de novo recruitment of IgA ASC to the intestinal lamina propria is compromised, leading to bacterial overgrowth, dysbiosis, and lethal colitis. Thus, despite the safe and effective use of anti-integrin antibodies in patients with IBD, much remains to be learned about their various cell targets.
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Affiliation(s)
- Giorgos Bamias
- GI Unit, 3rd Academic Department of Internal Medicine, National and Kapodistrian University of Athens, Sotiria Hospital, Athens, Greece
| | - Konstantina Kitsou
- GI Unit, 3rd Academic Department of Internal Medicine, National and Kapodistrian University of Athens, Sotiria Hospital, Athens, Greece
| | - Jesús Rivera-Nieves
- Gastroenterology Section, San Diego VA Medical Center, La Jolla Village Drive, San Diego, CA, USA
- Division of Gastroenterology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
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13
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Monzó C, Gkioni L, Beyer A, Valenzano DR, Grönke S, Partridge L. Dietary restriction mitigates the age-associated decline in mouse B cell receptor repertoire diversity. Cell Rep 2023; 42:112722. [PMID: 37384530 PMCID: PMC10391628 DOI: 10.1016/j.celrep.2023.112722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 05/07/2023] [Accepted: 06/13/2023] [Indexed: 07/01/2023] Open
Abstract
Aging impairs the capacity to respond to novel antigens, reducing immune protection against pathogens and vaccine efficacy. Dietary restriction (DR) extends life- and health span in diverse animals. However, little is known about the capacity of DR to combat the decline in immune function. Here, we study the changes in B cell receptor (BCR) repertoire during aging in DR and control mice. By sequencing the variable region of the BCR heavy chain in the spleen, we show that DR preserves diversity and attenuates the increase in clonal expansions throughout aging. Remarkably, mice starting DR in mid-life have repertoire diversity and clonal expansion rates indistinguishable from chronic DR mice. In contrast, in the intestine, these traits are unaffected by either age or DR. Reduced within-individual B cell repertoire diversity and increased clonal expansions are correlated with higher morbidity, suggesting a potential contribution of B cell repertoire dynamics to health during aging.
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Affiliation(s)
- Carolina Monzó
- Department Biological Mechanisms of Ageing, Max Planck Institute for Biology of Ageing, 50931 Cologne, North Rhine Westphalia, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Age-Associated Diseases (CECAD), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50931 Cologne, Germany
| | - Lisonia Gkioni
- Department Biological Mechanisms of Ageing, Max Planck Institute for Biology of Ageing, 50931 Cologne, North Rhine Westphalia, Germany
| | - Andreas Beyer
- Cologne Excellence Cluster on Cellular Stress Responses in Age-Associated Diseases (CECAD), Faculty of Medicine and Faculty of Mathematics and Natural Sciences, University of Cologne, 50931 Cologne, Germany
| | - Dario Riccardo Valenzano
- Microbiome-Host Interactions in Ageing Group, Max Planck Institute for Biology of Ageing, 50931 Cologne, North Rhine Westphalia, Germany; Evolutionary Biology/Microbiome-Host Interactions in Aging Group: Fritz Lipmann Institute - Leibniz Institute on Aging, 07745 Jena, Thuringia, Germany.
| | - Sebastian Grönke
- Department Biological Mechanisms of Ageing, Max Planck Institute for Biology of Ageing, 50931 Cologne, North Rhine Westphalia, Germany.
| | - Linda Partridge
- Department Biological Mechanisms of Ageing, Max Planck Institute for Biology of Ageing, 50931 Cologne, North Rhine Westphalia, Germany; Genetics, Evolution & Environment Group, Institute of Healthy Ageing, University College London, London WC1E 6BT, UK.
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14
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von Gunten S, Schneider C, Imamovic L, Gorochov G. Antibody diversity in IVIG: Therapeutic opportunities for novel immunotherapeutic drugs. Front Immunol 2023; 14:1166821. [PMID: 37063852 PMCID: PMC10090664 DOI: 10.3389/fimmu.2023.1166821] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 03/15/2023] [Indexed: 03/31/2023] Open
Abstract
Significant progress has been made in the elucidation of human antibody repertoires. Furthermore, non-canonical functions of antibodies have been identified that reach beyond classical functions linked to protection from pathogens. Polyclonal immunoglobulin preparations such as IVIG and SCIG represent the IgG repertoire of the donor population and will likely remain the cornerstone of antibody replacement therapy in immunodeficiencies. However, novel evidence suggests that pooled IgA might promote orthobiotic microbial colonization in gut dysbiosis linked to mucosal IgA immunodeficiency. Plasma-derived polyclonal IgG and IgA exhibit immunoregulatory effects by a diversity of different mechanisms, which have inspired the development of novel drugs. Here we highlight recent insights into IgG and IgA repertoires and discuss potential implications for polyclonal immunoglobulin therapy and inspired drugs.
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Affiliation(s)
- Stephan von Gunten
- Institute of Pharmacology, University of Bern, Bern, Switzerland
- *Correspondence: Stephan von Gunten,
| | | | - Lejla Imamovic
- Sorbonne Université, Inserm, Assistance Publique Hôpitaux de Paris (AP-HP), Pitié-Salpêtrière Hospital, Paris, France
| | - Guy Gorochov
- Sorbonne Université, Inserm, Assistance Publique Hôpitaux de Paris (AP-HP), Pitié-Salpêtrière Hospital, Paris, France
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15
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Wang Y, Xu Y, Cao G, Zhou X, Wang Q, Fu A, Zhan X. Bacillus subtilis DSM29784 attenuates Clostridium perfringens-induced intestinal damage of broilers by modulating intestinal microbiota and the metabolome. Front Microbiol 2023; 14:1138903. [PMID: 37007491 PMCID: PMC10060821 DOI: 10.3389/fmicb.2023.1138903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 02/22/2023] [Indexed: 03/18/2023] Open
Abstract
Necrotic enteritis (NE), especially subclinical NE (SNE), without clinical symptoms, in chicks has become one of the most threatening problems to the poultry industry. Therefore, increasing attention has been focused on the research and application of effective probiotic strains as an alternative to antibiotics to prevent SNE in broilers. In the present study, we evaluated the effects of Bacillus subtilis DSM29784 (BS) on the prevention of subclinical necrotic enteritis (SNE) in broilers. A total of 480 1-day-old broiler chickens were randomly assigned to four dietary treatments, each with six replicates pens of twenty birds for 63 d. The negative (Ctr group) and positive (SNE group) groups were only fed a basal diet, while the two treatment groups received basal diets supplemented with BS (1 × 109 colony-forming units BS/kg) (BS group) and 10mg/kg enramycin (ER group), respectively. On days 15, birds except those in the Ctr group were challenged with 20-fold dose coccidiosis vaccine, and then with 1 ml of C. perfringens (2 × 108) at days 18 to 21 for SNE induction. BS, similar to ER, effectively attenuated CP-induced poor growth performance. Moreover, BS pretreatment increased villi height, claudin-1 expression, maltase activity, and immunoglobulin abundance, while decreasing lesional scores, as well as mucosal IFN-γ and TNF-α concentrations. In addition, BS pretreatment increased the relative abundance of beneficial bacteria and decreased that of pathogenic species; many lipid metabolites were enriched in the cecum of treated chickens. These results suggest that BS potentially provides active ingredients that may serve as an antibiotic substitute, effectively preventing SNE-induced growth decline by enhancing intestinal health in broilers.
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Affiliation(s)
- Yuanyuan Wang
- Key Laboratory of Molecular Animal Nutrition of the Ministry of Education, College of Animal Sciences, Institute of Feed Science, Zhejiang University, Hangzhou, China
| | - Yibin Xu
- Key Laboratory of Molecular Animal Nutrition of the Ministry of Education, College of Animal Sciences, Institute of Feed Science, Zhejiang University, Hangzhou, China
| | | | - Xihong Zhou
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Qian Wang
- Yancheng Biological Engineering Higher Vocational Technology School, Yancheng, China
| | - Aikun Fu
- Key Laboratory of Molecular Animal Nutrition of the Ministry of Education, College of Animal Sciences, Institute of Feed Science, Zhejiang University, Hangzhou, China
- *Correspondence: Xiuan Zhan, ; Aikun Fu,
| | - Xiuan Zhan
- Key Laboratory of Molecular Animal Nutrition of the Ministry of Education, College of Animal Sciences, Institute of Feed Science, Zhejiang University, Hangzhou, China
- *Correspondence: Xiuan Zhan, ; Aikun Fu,
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16
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Ceglia S, Berthelette A, Howley K, Li Y, Mortzfeld B, Bhattarai SK, Yiew NKH, Xu Y, Brink R, Cyster JG, Hooper LV, Randolph GJ, Bucci V, Reboldi A. An epithelial cell-derived metabolite tunes immunoglobulin A secretion by gut-resident plasma cells. Nat Immunol 2023; 24:531-544. [PMID: 36658240 PMCID: PMC10243503 DOI: 10.1038/s41590-022-01413-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 12/14/2022] [Indexed: 01/21/2023]
Abstract
Immunoglobulin A (IgA) secretion by plasma cells, terminally differentiated B cells residing in the intestinal lamina propria, assures microbiome homeostasis and protects the host against enteric infections. Exposure to diet-derived and commensal-derived signals provides immune cells with organizing cues that instruct their effector function and dynamically shape intestinal immune responses at the mucosal barrier. Recent data have described metabolic and microbial inputs controlling T cell and innate lymphoid cell activation in the gut; however, whether IgA-secreting lamina propria plasma cells are tuned by local stimuli is completely unknown. Although antibody secretion is considered to be imprinted during B cell differentiation and therefore largely unaffected by environmental changes, a rapid modulation of IgA levels in response to intestinal fluctuations might be beneficial to the host. In the present study, we showed that dietary cholesterol absorption and commensal recognition by duodenal intestinal epithelial cells lead to the production of oxysterols, evolutionarily conserved lipids with immunomodulatory functions. Using conditional cholesterol 25-hydroxylase deleter mouse line we demonstrated that 7α,25-dihydroxycholesterol from epithelial cells is critical to restrain IgA secretion against commensal- and pathogen-derived antigens in the gut. Intestinal plasma cells sense oxysterols via the chemoattractant receptor GPR183 and couple their tissue positioning with IgA secretion. Our findings revealed a new mechanism linking dietary cholesterol and humoral immune responses centered around plasma cell localization for efficient mucosal protection.
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Affiliation(s)
- Simona Ceglia
- Department of Pathology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Alyssa Berthelette
- Department of Pathology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Kelsey Howley
- Department of Pathology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Yun Li
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Benedikt Mortzfeld
- Department of Microbiology and Physiological systems, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Shakti K Bhattarai
- Department of Microbiology and Physiological systems, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Nicole K H Yiew
- Department of Pathology and Immunology, Washington University Medical School, St. Louis, MO, USA
| | - Ying Xu
- Howard Hughes Medical Institute and Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, USA
| | - Robert Brink
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
- St Vincent's Clinical School, UNSW Sydney, Sydney, New South Wales, Australia
| | - Jason G Cyster
- Howard Hughes Medical Institute and Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, USA
| | - Lora V Hooper
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Gwendalyn J Randolph
- Department of Pathology and Immunology, Washington University Medical School, St. Louis, MO, USA
| | - Vanni Bucci
- Department of Microbiology and Physiological systems, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Andrea Reboldi
- Department of Pathology, University of Massachusetts Chan Medical School, Worcester, MA, USA.
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17
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Spencer J, Bemark M. Human intestinal B cells in inflammatory diseases. Nat Rev Gastroenterol Hepatol 2023; 20:254-265. [PMID: 36849542 DOI: 10.1038/s41575-023-00755-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/07/2023] [Indexed: 03/01/2023]
Abstract
The intestinal lumen contains an abundance of bacteria, viruses and fungi alongside ingested material that shape the chronically active intestinal immune system from early life to maintain the integrity of the gut epithelial barrier. In health, the response is intricately balanced to provide active protection against pathogen invasion whilst tolerating food and avoiding inflammation. B cells are central to achieving this protection. Their activation and maturation generates the body's largest plasma cell population that secretes IgA, and the niches they provide support systemic immune cell specialization. For example, the gut supports the development and maturation of a splenic B cell subset - the marginal zone B cells. In addition, cells such as the T follicular helper cells, which are enriched in many autoinflammatory diseases, are intrinsically associated with the germinal centre microenvironment that is more abundant in the gut than in any other tissue in health. In this Review, we discuss intestinal B cells and their role when a loss of homeostasis results in intestinal and systemic inflammatory diseases.
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Affiliation(s)
- Jo Spencer
- School of Immunology and Microbial Sciences, King's College London, Guy's Campus, London, UK.
| | - Mats Bemark
- Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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18
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Qiu L, Zhang Y, Zeng X. The function of γδ T cells in humoral immune responses. Inflamm Res 2023; 72:747-755. [PMID: 36799949 DOI: 10.1007/s00011-023-01704-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 02/18/2023] Open
Abstract
PURPOSE The purpose of this review is to discuss the role of γδ T cells played in humoral immune responses. BACKGROUND The γδ T cell receptor (γδ TCR) recognizes antigens, including haptens and proteins, in an MHC-independent manner. The recognition of these antigens by γδ TCRs crosses antigen recognition by the B cell receptors (BCRs), suggesting that γδ T cells may be involved in the process of antigen recognition and activation of B cells. However, the role of γδ T cells in humoral immune responses is still less clear. METHODS The kinds of literature about the γδ T cell-B cell interaction were searched on PubMed with search terms, such as γδ T cells, antibody, B cell responses, antigen recognition, and infection. RESULTS Accumulating evidence indicates that γδ T cells, independent of αβ T cells, participate in multiple steps of humoral immunity, including B cell maturation, activation and differentiation, antibody production and class switching. Mechanically, γδ T cells affect B cell function by directly interacting with B cells, secreting cytokines, or modulating αβ T cells. CONCLUSION In this review, we summarize current knowledge on how γδ T cells take part in the humoral immune response, which may assist future vaccine design.
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Affiliation(s)
- Lingfeng Qiu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yixi Zhang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xun Zeng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
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19
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Sollid LM, Iversen R. Tango of B cells with T cells in the making of secretory antibodies to gut bacteria. Nat Rev Gastroenterol Hepatol 2023; 20:120-128. [PMID: 36056203 DOI: 10.1038/s41575-022-00674-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/27/2022] [Indexed: 02/03/2023]
Abstract
Polymeric IgA and IgM are transported across the epithelial barrier from plasma cells in the lamina propria to exert a function in the gut lumen as secretory antibodies. Many secretory antibodies are reactive with the gut bacteria, and mounting evidence suggests that these antibodies are important for the host to control gut bacterial communities. However, we have incomplete knowledge of how bacteria-reactive secretory antibodies are formed. Antibodies from gut plasma cells often show bacterial cross-species reactivity, putting the degree of specificity behind anti-bacterial antibody responses into question. Such cross-species reactive antibodies frequently recognize non-genome-encoded membrane glycan structures. On the other hand, the T cell epitopes are peptides encoded in the bacterial genomes, thereby allowing a higher degree of predictable specificity on the T cell side of anti-bacterial immune responses. In this Perspective, we argue that the production of bacteria-reactive secretory antibodies is mainly controlled by the antigen specificity of T cells, which provide help to B cells. To be able to harness this system (for instance, for manipulation with vaccines), we need to obtain insight into the bacterial epitopes recognized by T cells in addition to characterizing the reactivity of the antibodies.
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Affiliation(s)
- Ludvig M Sollid
- K.G. Jebsen Coeliac Disease Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway. .,Department of Immunology, Oslo University Hospital - Rikshospitalet, Oslo, Norway.
| | - Rasmus Iversen
- K.G. Jebsen Coeliac Disease Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway. .,Department of Immunology, Oslo University Hospital - Rikshospitalet, Oslo, Norway.
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20
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Wei Z, Yu B, Huang Z, Luo Y, Zheng P, Mao X, Yu J, Luo J, Yan H, He J. Effect of 3-caffeoylquinic acid on growth performance, nutrient digestibility, and intestinal functions in weaned pigs. J Anim Sci 2023; 101:skad234. [PMID: 37422911 PMCID: PMC10393208 DOI: 10.1093/jas/skad234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 07/08/2023] [Indexed: 07/11/2023] Open
Abstract
Phenolic acid like with the 3-caffeoylquini acid (3-CQA) is formed by caffeic acid and qunic acid. This study was conducted to explore the effect of 3-CQA on growth performance and intestinal functions in weaned pigs. A total of 180 weaned pigs were randomly allocated into five treatments with 6 replicate pens per treatment (6 pigs per pen). Pigs in the control group (CON) were fed with basal diet (BD), and the others in the experimental groups were fed with BD and supplemented with 12.5, 25, 50, and 100 mg/kg 3-CQA. On day 43, the blood sample-collected pigs in the CON and optimal-dose group (only based on growth performance) were picked, and housed in metabolism cages (a total of 12 pigs, N = 6). 3-CQA increased the feed efficiency from days 21 to 42 of the trial and throughout the trial (P < 0.05). 3-CQA increased the serum concentrations of total protein, albumin, and total cholesterol (P < 0.05). Moreover, 3-CQA supplementation at 25 mg/kg increased the apparent digestibility of DM, energy, and ash (P < 0.05). Interestingly, 3-CQA decreased the crypt depth but increased the ratio of villus height to crypt depth in the jejunum and ileum (P < 0.05). Moreover, 3-CQA also increased the activities of sucrase, lactase, and catalase in the jejunal mucosa, and increased the activities of alkaline phosphatase and superoxide dismutase in the ileal mucosa (P < 0.05). 3-CQA also increased the abundance of secretory immunoglobulin A in the ileal mucosa (P < 0.05). Importantly, 3-CQA not only elevated the expression levels of critical functional genes such as the zonula occludens-1 , occludin, solute carrier family 7 , and nuclear factor erythroid 2-related factor 2 (Nrf2) in the duodenum but also elevated the expression levels of divalent metal transporter-1 and Nrf2 in the jejunum (P < 0.05). These results suggested a positive effect of 3-CQA supplementation on the growth and intestinal functions of weaned pigs. The mechanisms of action may be associated with elevated anti-oxidant capacity and improved intestinal barrier functions.
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Affiliation(s)
- Zixiang Wei
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
| | - Bing Yu
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
| | - Zhiqing Huang
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
| | - Yuheng Luo
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
| | - Ping Zheng
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
| | - Xiangbing Mao
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
| | - Jie Yu
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
| | - Junqiu Luo
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
| | - Hui Yan
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
| | - Jun He
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu 611130, P. R. China
- Key Laboratory of Animal Disease-resistant Nutrition, Sichuan Province, Chengdu 611130, P. R. China
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21
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Sanchez MM, Bagdasarian IA, Darch W, Morgan JT. Organotypic cultures as aging associated disease models. Aging (Albany NY) 2022; 14:9338-9383. [PMID: 36435511 PMCID: PMC9740367 DOI: 10.18632/aging.204361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 10/21/2022] [Indexed: 11/24/2022]
Abstract
Aging remains a primary risk factor for a host of diseases, including leading causes of death. Aging and associated diseases are inherently multifactorial, with numerous contributing factors and phenotypes at the molecular, cellular, tissue, and organismal scales. Despite the complexity of aging phenomena, models currently used in aging research possess limitations. Frequently used in vivo models often have important physiological differences, age at different rates, or are genetically engineered to match late disease phenotypes rather than early causes. Conversely, routinely used in vitro models lack the complex tissue-scale and systemic cues that are disrupted in aging. To fill in gaps between in vivo and traditional in vitro models, researchers have increasingly been turning to organotypic models, which provide increased physiological relevance with the accessibility and control of in vitro context. While powerful tools, the development of these models is a field of its own, and many aging researchers may be unaware of recent progress in organotypic models, or hesitant to include these models in their own work. In this review, we describe recent progress in tissue engineering applied to organotypic models, highlighting examples explicitly linked to aging and associated disease, as well as examples of models that are relevant to aging. We specifically highlight progress made in skin, gut, and skeletal muscle, and describe how recently demonstrated models have been used for aging studies or similar phenotypes. Throughout, this review emphasizes the accessibility of these models and aims to provide a resource for researchers seeking to leverage these powerful tools.
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Affiliation(s)
- Martina M. Sanchez
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
| | | | - William Darch
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
| | - Joshua T. Morgan
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
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22
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Zhang L, Wang Y, Jia H, Liu X, Zhang R, Guan J. Transcriptome and metabolome analyses reveal the regulatory effects of compound probiotics on cecal metabolism in heat-stressed broilers. Poult Sci 2022; 102:102323. [PMID: 36436366 PMCID: PMC9706624 DOI: 10.1016/j.psj.2022.102323] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 10/30/2022] [Accepted: 11/01/2022] [Indexed: 11/06/2022] Open
Abstract
The effect of compound probiotics on the caecum of broilers under heat stress was assessed in this study. A total of 400 twenty-eight-day-old AA male broilers were randomly divided into 4 treatment groups, where each group had 5 replicates of 20 broilers. The 4 treatment groups were a heat stress control group (broilers receiving a normal diet) and groups HP I, HP II, and HP Ⅲ, consisting of broilers receiving 1, 5, and 10 g of compound probiotics added to each kilogram of feed, respectively. Compound probiotics (L. casei, L. acidophilus, and B. lactis at a ratio of 1:1:2) were used to formulate a compound probiotic powder, with 1 × 1010 CFU/g of effective viable bacteria. Heat stress treatment was performed at 32 ± 1°C from 9:00 to 17:00 every day from 28 d to 42 d. In d 28 to 42, compared with the HC group, the ADG of broilers in the HP II and III groups was significantly increased (P < 0.05); the ADFI difference between groups was not significant (P > 0.05); the FCR of HP II and III broilers was significantly decreased (P < 0.05); and the FCR of the HP I group increased, but the difference was not significant (P > 0.05). Transcriptome results demonstrate that 665 differential genes were screened (DEGs; upregulated: 366, downregulated: 299). The DEGs were enriched in the B cell receptor signaling pathway, the intestinal immune network for IgA synthesis, the Fc epsilon RI signaling pathway, and other signaling pathways, according to KEGG enrichment analysis. Metabolome analysis identified 92 differential metabolites (DAMs; upregulated: 48, downregulated: 44). KEGG enrichment analysis indicated significant enrichment of Pantothenate and CoA biosynthesis and beta-Alanine metabolism. The combined transcriptome and metabolome analysis revealed that the DAMs and DEGs were mostly involved in beta-alanine metabolism, arginine biosynthesis, amino sugar and nucleotide sugar, and alanine, aspartate, and glutamate metabolism. The results of this study suggest that the addition of compound probiotics has a positive effect on intestinal metabolites, improving the growth performance and contributing to the overall health of broilers under heat stress.
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23
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Ng KW, Hobbs A, Wichmann C, Victora GD, Donaldson GP. B cell responses to the gut microbiota. Adv Immunol 2022; 155:95-131. [PMID: 36357013 DOI: 10.1016/bs.ai.2022.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Most antibody produced by humans originates from mucosal B cell responses. The rules, mechanisms, and outcomes of this process are distinct from B cell responses to infection. Within the context of the intestine, we discuss the induction of follicular B cell responses by microbiota, the development and maintenance of mucosal antibody-secreting cells, and the unusual impacts of mucosal antibody on commensal bacteria. Much remains to be learned about the interplay between B cells and the microbiota, but past and present work hints at a complex, nuanced relationship that may be critical to the way the mammalian gut fosters a beneficial microbial ecosystem.
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Affiliation(s)
- Kevin W Ng
- Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, United States
| | - Alvaro Hobbs
- Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, United States
| | - Christopher Wichmann
- Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, United States; Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY, United States; Immune Regulation Group, Department of Pediatrics, University Medical Center Rostock, Rostock, Germany
| | - Gabriel D Victora
- Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, United States.
| | - Gregory P Donaldson
- Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY, United States.
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24
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Jones ST, Guo K, Cooper EH, Dillon SM, Wood C, Nguyen DH, Shen G, Barrett BS, Frank DN, Kroehl M, Janoff EN, Kechris K, Wilson CC, Santiago ML. Altered Immunoglobulin Repertoire and Decreased IgA Somatic Hypermutation in the Gut during Chronic HIV-1 Infection. J Virol 2022; 96:e0097622. [PMID: 35938870 PMCID: PMC9472609 DOI: 10.1128/jvi.00976-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 07/21/2022] [Indexed: 11/27/2022] Open
Abstract
Humoral immune perturbations contribute to pathogenic outcomes in persons with HIV-1 infection (PWH). Gut barrier dysfunction in PWH is associated with microbial translocation and alterations in microbial communities (dysbiosis), and IgA, the most abundant immunoglobulin (Ig) isotype in the gut, is involved in gut homeostasis by interacting with the microbiome. We determined the impact of HIV-1 infection on the antibody repertoire in the gastrointestinal tract by comparing Ig gene utilization and somatic hypermutation (SHM) in colon biopsies from PWH (n = 19) versus age and sex-matched controls (n = 13). We correlated these Ig parameters with clinical, immunological, microbiome and virological data. Gene signatures of enhanced B cell activation were accompanied by skewed frequencies of multiple Ig Variable genes in PWH. PWH showed decreased frequencies of SHM in IgA and possibly IgG, with a substantial loss of highly mutated IgA sequences. The decline in IgA SHM in PWH correlated with gut CD4+ T cell loss and inversely correlated with mucosal inflammation and microbial translocation. Diminished gut IgA SHM in PWH was driven by transversion mutations at A or T deoxynucleotides, suggesting a defect not at the AID/APOBEC3 deamination step but at later stages of IgA SHM. These results expand our understanding of humoral immune perturbations in PWH that could have important implications in understanding mucosal immune defects in individuals with chronic HIV-1 infection. IMPORTANCE The gut is a major site of early HIV-1 replication and pathogenesis. Extensive CD4+ T cell depletion in this compartment results in a compromised epithelial barrier that facilitates the translocation of microbes into the underlying lamina propria and systemic circulation, resulting in chronic immune activation. To date, the consequences of microbial translocation on the mucosal humoral immune response (or vice versa) remains poorly integrated into the panoply of mucosal immune defects in PWH. We utilized next-generation sequencing approaches to profile the Ab repertoire and ascertain frequencies of somatic hypermutation in colon biopsies from antiretroviral therapy-naive PWH versus controls. Our findings identify perturbations in the Ab repertoire of PWH that could contribute to development or maintenance of dysbiosis. Moreover, IgA mutations significantly decreased in PWH and this was associated with adverse clinical outcomes. These data may provide insight into the mechanisms underlying impaired Ab-dependent gut homeostasis during chronic HIV-1 infection.
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Affiliation(s)
- Sean T. Jones
- Division of Infectious Diseases, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Kejun Guo
- Division of Infectious Diseases, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- RNA Bioscience Initiative, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Emily H. Cooper
- Center for Innovative Design and Analysis, Department of Biostatistics and Informatics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Stephanie M. Dillon
- Division of Infectious Diseases, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Cheyret Wood
- Center for Innovative Design and Analysis, Department of Biostatistics and Informatics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - David H. Nguyen
- Division of Infectious Diseases, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Guannan Shen
- Center for Innovative Design and Analysis, Department of Biostatistics and Informatics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Bradley S. Barrett
- Division of Infectious Diseases, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Daniel N. Frank
- Division of Infectious Diseases, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Miranda Kroehl
- Center for Innovative Design and Analysis, Department of Biostatistics and Informatics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Edward N. Janoff
- Division of Infectious Diseases, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, Colorado, USA
| | - Katerina Kechris
- Center for Innovative Design and Analysis, Department of Biostatistics and Informatics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Cara C. Wilson
- Division of Infectious Diseases, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- RNA Bioscience Initiative, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Mario L. Santiago
- Division of Infectious Diseases, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- RNA Bioscience Initiative, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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25
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A self-sustaining layer of early-life-origin B cells drives steady-state IgA responses in the adult gut. Immunity 2022; 55:1829-1842.e6. [PMID: 36115337 DOI: 10.1016/j.immuni.2022.08.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 05/20/2022] [Accepted: 08/24/2022] [Indexed: 12/12/2022]
Abstract
The adult immune system consists of cells that emerged at various times during ontogeny. We aimed to define the relationship between developmental origin and composition of the adult B cell pool during unperturbed hematopoiesis. Lineage tracing stratified murine adult B cells based on the timing of output, revealing that a substantial portion originated within a restricted neonatal window. In addition to B-1a cells, early-life time-stamped B cells included clonally interrelated IgA plasma cells in the gut and bone marrow. These were actively maintained by B cell memory within gut chronic germinal centers and contained commensal microbiota reactivity. Neonatal rotavirus infection recruited recurrent IgA clones that were distinct from those arising by infection with the same antigen in adults. Finally, gut IgA plasma cells arose from the same hematopoietic progenitors as B-1a cells during ontogeny. Thus, a complex layer of neonatally imprinted B cells confer unique antibody responses later in life.
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26
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Perruzza L, Strati F, Raneri M, Li H, Gargari G, Rezzonico-Jost T, Palatella M, Kwee I, Morone D, Seehusen F, Sonego P, Donati C, Franceschi P, Macpherson AJ, Guglielmetti S, Greiff V, Grassi F. Apyrase-mediated amplification of secretory IgA promotes intestinal homeostasis. Cell Rep 2022; 40:111112. [PMID: 35858559 DOI: 10.1016/j.celrep.2022.111112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 05/15/2022] [Accepted: 06/28/2022] [Indexed: 11/25/2022] Open
Abstract
Secretory immunoglobulin A (SIgA) interaction with commensal bacteria conditions microbiota composition and function. However, mechanisms regulating reciprocal control of microbiota and SIgA are not defined. Bacteria-derived adenosine triphosphate (ATP) limits T follicular helper (Tfh) cells in the Peyer's patches (PPs) via P2X7 receptor (P2X7R) and thereby SIgA generation. Here we show that hydrolysis of extracellular ATP (eATP) by apyrase results in amplification of the SIgA repertoire. The enhanced breadth of SIgA in mice colonized with apyrase-releasing Escherichia coli influences topographical distribution of bacteria and expression of genes involved in metabolic versus immune functions in the intestinal epithelium. SIgA-mediated conditioning of bacteria and enterocyte function is reflected by differences in nutrient absorption in mice colonized with apyrase-expressing bacteria. Apyrase-induced SIgA improves intestinal homeostasis and attenuates barrier impairment and susceptibility to infection by enteric pathogens in antibiotic-induced dysbiosis. Therefore, amplification of SIgA by apyrase can be leveraged to restore intestinal fitness in dysbiotic conditions.
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Affiliation(s)
- Lisa Perruzza
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Bellinzona 6500, Switzerland
| | - Francesco Strati
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Bellinzona 6500, Switzerland
| | - Matteo Raneri
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Bellinzona 6500, Switzerland
| | - Hai Li
- Maurice Müller Laboratories, Department of Biomedical Research, Universitätsklinik für Viszerale Chirurgie und Medizin, Inselspital, University of Bern, Bern 3010, Switzerland
| | - Giorgio Gargari
- Division of Food Microbiology and Bioprocesses, Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Milan 20133, Italy
| | - Tanja Rezzonico-Jost
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Bellinzona 6500, Switzerland
| | - Martina Palatella
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Bellinzona 6500, Switzerland
| | - Ivo Kwee
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Bellinzona 6500, Switzerland
| | - Diego Morone
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Bellinzona 6500, Switzerland
| | - Frauke Seehusen
- Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Zurich 8057, Switzerland
| | - Paolo Sonego
- Unit of Computational Biology, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige (TN) 38098, Italy
| | - Claudio Donati
- Unit of Computational Biology, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige (TN) 38098, Italy
| | - Pietro Franceschi
- Unit of Computational Biology, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige (TN) 38098, Italy
| | - Andrew J Macpherson
- Maurice Müller Laboratories, Department of Biomedical Research, Universitätsklinik für Viszerale Chirurgie und Medizin, Inselspital, University of Bern, Bern 3010, Switzerland
| | - Simone Guglielmetti
- Division of Food Microbiology and Bioprocesses, Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Milan 20133, Italy
| | - Victor Greiff
- Department of Immunology and Oslo University Hospital, University of Oslo, Oslo 0372, Norway
| | - Fabio Grassi
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Bellinzona 6500, Switzerland.
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27
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León ED, Francino MP. Roles of Secretory Immunoglobulin A in Host-Microbiota Interactions in the Gut Ecosystem. Front Microbiol 2022; 13:880484. [PMID: 35722300 PMCID: PMC9203039 DOI: 10.3389/fmicb.2022.880484] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 05/09/2022] [Indexed: 12/12/2022] Open
Abstract
In the gastrointestinal tract (GIT), the immune system interacts with a variety of microorganisms, including pathogens as well as beneficial symbionts that perform important physiological functions for the host and are crucial to sustain intestinal homeostasis. In normal conditions, secretory immunoglobulin A (SIgA) is the principal antibody produced by B cells in the GIT mucosa. Polyreactivity provides certain SIgA molecules with the ability of binding different antigens in the bacterial surface, such as O-antigens and teichoic acids, while cross-species reactivity allows them to recognize and interact with different types of bacteria. These functions may be crucial in allowing SIgA to modulate the complex gut microbiota in an efficient manner. Several studies suggest that SIgA can help with the retention and proliferation of helpful members of the gut microbiota. Gut microbiota alterations in people with IgA deficiency include the lack of some species that are known to be normally coated by SIgA. Here, we discuss the different ways in which SIgA behaves in relation to pathogens and beneficial bacteria of the gut microbiota and how the immune system might protect and facilitate the establishment and maintenance of certain gut symbionts.
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Affiliation(s)
- E Daniel León
- Department of Genomics and Health, Fundación Para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana (FISABIO), Valencia, Spain
| | - M Pilar Francino
- Department of Genomics and Health, Fundación Para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana (FISABIO), Valencia, Spain.,CIBER en Epidemiología y Salud Pública, Madrid, Spain
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28
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Gilboa A, Hope R, Ben Simon S, Polak P, Koren O, Yaari G. Ontogeny of the B Cell Receptor Repertoire and Microbiome in Mice. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:2713-2725. [PMID: 35623663 DOI: 10.4049/jimmunol.2100955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 03/30/2022] [Indexed: 06/15/2023]
Abstract
The immune system matures throughout childhood to achieve full functionality in protecting our bodies against threats. The immune system has a strong reciprocal symbiosis with the host bacterial population and the two systems co-develop, shaping each other. Despite their fundamental role in health physiology, the ontogeny of these systems is poorly characterized. In this study, we investigated the development of the BCR repertoire by analyzing high-throughput sequencing of their receptors in several time points of young C57BL/6J mice. In parallel, we explored the development of the gut microbiome. We discovered that the gut IgA repertoires change from birth to adolescence, including an increase in CDR3 lengths and somatic hypermutation levels. This contrasts with the spleen IgM repertoires that remain stable and distinct from the IgA repertoires in the gut. We also discovered that large clones that germinate in the gut are initially confined to a specific gut compartment, then expand to nearby compartments and later on expand also to the spleen and remain there. Finally, we explored the associations between diversity indices of the B cell repertoires and the microbiome, as well as associations between bacterial and BCR clusters. Our results shed light on the ontogeny of the adaptive immune system and the microbiome, providing a baseline for future research.
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Affiliation(s)
- Amit Gilboa
- Bioengineering, Faculty of Engineering, Bar Ilan University, Ramat Gan, Israel
- Bar Ilan Institute of Nanotechnologies and Advanced Materials, Bar Ilan University, Ramat Gan, Israel; and
| | - Ronen Hope
- Bioengineering, Faculty of Engineering, Bar Ilan University, Ramat Gan, Israel
| | - Shira Ben Simon
- Azrieli Faculty of Medicine, Bar Ilan University, Safed, Israel
| | - Pazit Polak
- Bioengineering, Faculty of Engineering, Bar Ilan University, Ramat Gan, Israel
- Bar Ilan Institute of Nanotechnologies and Advanced Materials, Bar Ilan University, Ramat Gan, Israel; and
| | - Omry Koren
- Azrieli Faculty of Medicine, Bar Ilan University, Safed, Israel
| | - Gur Yaari
- Bioengineering, Faculty of Engineering, Bar Ilan University, Ramat Gan, Israel;
- Bar Ilan Institute of Nanotechnologies and Advanced Materials, Bar Ilan University, Ramat Gan, Israel; and
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29
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Gonçalves JIB, Borges TJ, de Souza APD. Microbiota and the Response to Vaccines Against Respiratory Virus. Front Immunol 2022; 13:889945. [PMID: 35603203 PMCID: PMC9122122 DOI: 10.3389/fimmu.2022.889945] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 04/12/2022] [Indexed: 11/13/2022] Open
Abstract
This mini review describes the role of gut and lung microbiota during respiratory viral infection and discusses the implication of the microbiota composition on the immune responses generated by the vaccines designed to protect against these pathogens. This is a growing field and recent evidence supports that the composition and function of the microbiota can modulate the immune response of vaccination against respiratory viruses such as influenza and SARS-CoV-2. Recent studies have highlighted that molecules derived from the microbiome can have systemic effects, acting in distant organs. These molecules are recognized by the immune cells from the host and can trigger or modulate different responses, interfering with vaccination protection. Modulating the microbiota composition has been suggested as an approach to achieving more efficient protective immune responses. Studies in humans have reported associations between a better vaccine response and specific bacterial taxa. These associations vary among different vaccine strategies and are likely to be context-dependent. The use of prebiotics and probiotics in conjunction with vaccination demonstrated that bacterial components could act as adjuvants. Future microbiota-based interventions may potentially improve and optimize the responses of respiratory virus vaccines.
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Affiliation(s)
- João I. B. Gonçalves
- Laboratory of Clinical and Experimental Immunology, Health and Life Science School - Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Thiago J. Borges
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Ana Paula Duarte de Souza
- Laboratory of Clinical and Experimental Immunology, Health and Life Science School - Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
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30
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Khan MZ, Li F, Huang X, Nouman M, Bibi R, Fan X, Zhou H, Shan Z, Wang L, Jiang Y, Cui W, Qiao X, Li Y, Wang X, Tang L. Oral Immunization of Chickens with Probiotic Lactobacillus crispatus Constitutively Expressing the α-β2-ε-β1 Toxoids to Induce Protective Immunity. Vaccines (Basel) 2022; 10:vaccines10050698. [PMID: 35632454 PMCID: PMC9147743 DOI: 10.3390/vaccines10050698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 04/26/2022] [Accepted: 04/26/2022] [Indexed: 02/04/2023] Open
Abstract
Clostridium perfringens (C. perfringens) is a bacterium that commonly causes zoonotic disease. The pathogenicity of C. perfringens is a result of the combined action of α, β, and ε exotoxins. In this study, Lactobacillus crispatus (pPG-T7g10/L. crispatus) expressing the main toxoids of C. perfringens, α, ε, β1, and β2, with EGFP-labeling, was constructed, and the protective effect was estimated in chickens. The α-β2-ε-β1 toxoid was constitutively expressed for confirmation by laser confocal microscopy and western blotting, and its immunogenicity was analyzed by enzyme-linked immunosorbent assay (ELISA) and immunohistochemical assays. After booster immunization, the probiotic vaccine group showed significantly higher levels (p < 0.05) of specific secretory IgA (sIgA) and IgY antibodies in the serum and intestinal mucus. Furthermore, the levels of cytokines, including interferon (IFN)-γ, interleukin (lL)-2, IL-4, IL-10, IL-12, and IL-17, and the proliferation of spleen lymphocytes in chickens orally immunized with pPG-E-α-β2-ε-β1/L. crispatus increased significantly. Histopathological observations showed that the intestinal pathological changes in chickens immunized with pPG-E-α-β2ε-β1/L. crispatus were significantly alleviated. These data reveal that the probiotic vaccine could stimulate mucosal, cellular, and humoral immunity and provide an active defense against the toxins of C. perfringens, suggesting a promising candidate for oral vaccines against C. perfringens.
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Affiliation(s)
- Mohammad Zeb Khan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
| | - Fengsai Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
| | - Xuewei Huang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
| | | | - Roshna Bibi
- Department of Boyany, University of Swat, Mingora 19200, Pakistan;
| | - Xiaolong Fan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
| | - Han Zhou
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
| | - Zhifu Shan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
| | - Li Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
| | - Yanping Jiang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
| | - Wen Cui
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
| | - Xinyuan Qiao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
| | - Yijing Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
| | - Xiaona Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
- Correspondence: (X.W.); (L.T.); Tel.: +86-451-55190824 (L.T.); Fax: +86-451-55190363 (L.T.)
| | - Lijie Tang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (M.Z.K.); (F.L.); (X.H.); (X.F.); (H.Z.); (Z.S.); (L.W.); (Y.J.); (W.C.); (X.Q.); (Y.L.)
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
- Correspondence: (X.W.); (L.T.); Tel.: +86-451-55190824 (L.T.); Fax: +86-451-55190363 (L.T.)
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Amevor FK, Cui Z, Du X, Ning Z, Deng X, Xu D, Shu G, Wu Y, Cao X, Shuo W, Tian Y, Li D, Wang Y, Zhang Y, Du X, Zhu Q, Han X, Zhao X. Supplementation of Dietary Quercetin and Vitamin E Promotes the Intestinal Structure and Immune Barrier Integrity in Aged Breeder Hens. Front Immunol 2022; 13:860889. [PMID: 35386687 PMCID: PMC8977514 DOI: 10.3389/fimmu.2022.860889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 02/21/2022] [Indexed: 12/14/2022] Open
Abstract
In aged animals, the physiological functions of the gastrointestinal tract (GIT) are reduced. Dietary intervention is necessary to re-activate GIT functions. The objective of this study was to investigate the impacts of dietary combination of quercetin (Q) and vitamin E (VE) on the intestinal structure and barrier integrity in aged breeder chickens. A sum of 400 (65-wks-old) Tianfu breeder hens were randomly allotted into four (4) groups with four (4) replicates, and fed with basal diet; basal diet supplemented with 0.4g/kg of Q; basal diet supplemented with 0.2g/kg of VE; and basal diet supplemented with the combination of Q (0.4 g/kg) and VE (0.2 g/kg) for 14 weeks. At the end of the 14th week, serum and gut segments were collected from eight hens per group for analyses. The results showed that Q+VE exerted synergistic effects on intestinal morphology by promoting villi height and crypt depth (P < 0.05), as well as mitigated the intestinal inflammatory damage of the aged hens, but decreased the concentration of serum D-lactate and diamine oxidase; and increased the levels of secretory immunoglobulin A (sIgA) and Mucin-2 mRNA (P < 0.05). Furthermore, the mRNA expression of intestinal tight junction proteins including occludin, ZO1, and claudin-1 was increased by Q+VE (P < 0.05). Moreover, Q+VE decreased the mRNA expression of the pro-inflammatory genes (TNF-α, IL-6, and IL-1β), and increased the expression of anti-inflammatory genes (IL-10 and IL-4) (P < 0.05). These results were consistent with the mRNA expression of Bax and Bcl-2. In addition, Q+VE protected the small intestinal tract from oxidative damage by increasing the levels of superoxide dismutase, total antioxidant capacity, glutathione peroxidase, catalase (P < 0.05), and the mRNA expression of SOD1 and GPx-2. However, Q+VE decreased malondialdehyde levels in the intestine compared to the control (P < 0.05). These results indicated that dietary Q+VE improved intestinal function in aged breeder hens, by protecting the intestinal structure and integrity. Therefore, Q+VE could act as an anti-aging agent to elevate the physiological functions of the small intestine in chickens.
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Affiliation(s)
- Felix Kwame Amevor
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Zhifu Cui
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xiaxia Du
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Zifan Ning
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xun Deng
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Dan Xu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Gang Shu
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Youhao Wu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xueqing Cao
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Wei Shuo
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Yaofu Tian
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Diyan Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Yan Wang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Yao Zhang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xiaohui Du
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Qing Zhu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xue Han
- Guizhou Institute of Animal Husbandry and Veterinary Medicine, Guiyang, China
| | - Xiaoling Zhao
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
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Severyn CJ, Siranosian BA, Kong STJ, Moreno A, Li MM, Chen N, Duncan CN, Margossian SP, Lehmann LE, Sun S, Andermann TM, Birbrayer O, Silverstein S, Reynolds CG, Kim S, Banaei N, Ritz J, Fodor AA, London WB, Bhatt AS, Whangbo JS. Microbiota dynamics in a randomized trial of gut decontamination during allogeneic hematopoietic cell transplantation. JCI Insight 2022; 7:e154344. [PMID: 35239511 PMCID: PMC9057614 DOI: 10.1172/jci.insight.154344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 03/02/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUNDGut decontamination (GD) can decrease the incidence and severity of acute graft-versus-host disease (aGVHD) in murine models of allogeneic hematopoietic cell transplantation (HCT). In this pilot study, we examined the impact of GD on gut microbiome composition and the incidence of aGVHD in HCT patients.METHODSWe randomized 20 patients undergoing allogeneic HCT to receive (GD) or not receive (no-GD) oral vancomycin-polymyxin B from day -5 through neutrophil engraftment. We evaluated shotgun metagenomic sequencing of serial stool samples to compare the composition and diversity of the gut microbiome between study arms. We assessed clinical outcomes in the 2 arms and performed strain-specific analyses of pathogens that caused bloodstream infections (BSI).RESULTSThe 2 arms did not differ in the predefined primary outcome of Shannon diversity of the gut microbiome at 2 weeks post-HCT (genus, P = 0.8; species, P = 0.44) or aGVHD incidence (P = 0.58). Immune reconstitution of T cell and B cell subsets was similar between groups. Five patients in the no-GD arm had 8 BSI episodes versus 1 episode in the GD arm (P = 0.09). The BSI-causing pathogens were traceable to the gut in 7 of 8 BSI episodes in the no-GD arm, including Staphylococcus species.CONCLUSIONWhile GD did not differentially affect Shannon diversity or clinical outcomes, our findings suggest that GD may protect against gut-derived BSI in HCT patients by decreasing the prevalence or abundance of gut pathogens.TRIAL REGISTRATIONClinicalTrials.gov NCT02641236.FUNDINGNIH, Damon Runyon Cancer Research Foundation, V Foundation, Sloan Foundation, Emerson Collective, and Stanford Maternal & Child Health Research Institute.
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Affiliation(s)
- Christopher J. Severyn
- Department of Pediatrics, Division of Pediatric Hematology/Oncology and Division of Pediatric Stem Cell Transplant and Regenerative Medicine
| | | | | | - Angel Moreno
- Department of Pathology, Stanford University, Palo Alto, California, USA
| | - Michelle M. Li
- Department of Biomedical Informatics, Harvard Medical School, Boston, Massachusetts, USA
| | - Nan Chen
- Dana-Farber/Boston Children’s Cancer and Blood Disorders Center, Boston, Massachusetts, USA
| | - Christine N. Duncan
- Dana-Farber/Boston Children’s Cancer and Blood Disorders Center, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Steven P. Margossian
- Dana-Farber/Boston Children’s Cancer and Blood Disorders Center, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Leslie E. Lehmann
- Dana-Farber/Boston Children’s Cancer and Blood Disorders Center, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Shan Sun
- Department of Bioinformatics and Genomics, College of Computing and Informatics, University of North Carolina at Charlotte, Charlotte, North Carolina, USA
| | - Tessa M. Andermann
- Department of Medicine, Division of Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Olga Birbrayer
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | | | - Carol G. Reynolds
- Harvard Medical School, Boston, Massachusetts, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Soomin Kim
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Niaz Banaei
- Department of Pathology, Stanford University, Palo Alto, California, USA
- Department of Medicine, Division of Infectious Diseases, Stanford University, Palo Alto, California, USA
| | - Jerome Ritz
- Harvard Medical School, Boston, Massachusetts, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Anthony A. Fodor
- Department of Bioinformatics and Genomics, College of Computing and Informatics, University of North Carolina at Charlotte, Charlotte, North Carolina, USA
| | - Wendy B. London
- Dana-Farber/Boston Children’s Cancer and Blood Disorders Center, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Ami S. Bhatt
- Departments of Genetics and Medicine, Division of Hematology
| | - Jennifer S. Whangbo
- Dana-Farber/Boston Children’s Cancer and Blood Disorders Center, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
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33
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Okyere SK, Wen J, Cui Y, Xie L, Gao P, Zhang M, Wang J, Wang S, Ran Y, Ren Z, Hu Y. Bacillus toyonensis SAU-19 and SAU-20 Isolated From Ageratina adenophora Alleviates the Intestinal Structure and Integrity Damage Associated With Gut Dysbiosis in Mice Fed High Fat Diet. Front Microbiol 2022; 13:820236. [PMID: 35250935 PMCID: PMC8891614 DOI: 10.3389/fmicb.2022.820236] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 01/04/2022] [Indexed: 12/18/2022] Open
Abstract
This study was performed to identify potential probiotic endophytes from Ageratina adenophora and evaluate their ameliorating effects on gut injury and integrity damage associated with microbiota dysbiosis in mice fed high fat diet. Using morphological and biochemical tests, and 16S rRNA gene sequencing technique, two bacteria endophytes were identified as strains of Bacillus toyonensis and were named Bacillus toyonensis SAU-19 (GenBank No. MW287198) and Bacillus toyonensis SAU-20 (GenBank No. MW287199). Sixty (60) mice were divided into five groups, group 1 was the negative control fed normal diet (NS), group 2 was fed High fat diet (HF), Group 3 was fed High fat diet + 106 Lactobacillus rhamnosus (LGG), group 4 was fed High fat + 106 Bacillus toyonensis SAU-19 and group 5 fed High fat diet + 106 Bacillus toyonensis SAU-20. After 35 days, histological and immunohistochemistry examination were performed in the ileum tissues. Furthermore, DAO and antioxidants activities were measured in serum, mRNA expressions of tight junction proteins (occludin and ZO-1) and inflammation related cytokines (IL-1β, TFN-α, IL-2, IL-4, and IL-10) in the ileum tissues as well as sIgA levels and total bacteria (Escherichia coli, Salmonella, Staphylococcus, and Lactobacillus) in the small intestine and cecum content. The results showed an increase in the DAO activity, oxidative stress parameter (MDA), pro-inflammation cytokines (IL-1β, TFN-α, IL-2), reduce immunity (sIgA), and destroyed intestinal structure and integrity (reduce tight junction proteins) in the high fat diet group and this was associated with destruction of the gut microbiota composition (increasing pathogenic bacteria; E. coli, Salmonella, Staphylococcus and reducing beneficial bacteria, Lactobacillus spp.) in mice (P < 0.05). However, the administration of Bacillus toyonensis SAU-19 and SAU-20 reverted these effects. Our findings indicated that, Bacillus toyonensis SAU-19 and SAU-20 isolated from A. adenophora could prevent the excess weight gain from high fat diet feeding, improved antioxidant status and alleviated the intestine integrity damage as well as reduce the population of enteric bacteria such as E. coli, Salmonella, and S. aureus and increasing the population of beneficial bacteria such as Lactobacillus in the gut of mice fed high fat diet, therefore, can serve as a potential probiotics in humans and animals.
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Affiliation(s)
- Samuel Kumi Okyere
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Juan Wen
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yujing Cui
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Lei Xie
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Pei Gao
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Ming Zhang
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Jianchen Wang
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Shu Wang
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yinan Ran
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhihua Ren
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yanchun Hu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- New Ruipeng Pet Healthcare Group Co., Ltd., Shenzhen, China
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34
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Han X, Guo J, Qin Y, Huang W, You Y, Zhan J. Dietary regulation of the SIgA-gut microbiota interaction. Crit Rev Food Sci Nutr 2022; 63:6379-6392. [PMID: 35125055 DOI: 10.1080/10408398.2022.2031097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Gut microbiota (GM) is essential for host health, and changes in the GM are related to the development of various diseases. Recently, secretory immunoglobulin A (SIgA), the most abundant immunoglobulin isotype in the intestinal mucosa, has been found to play an essential role in controlling GM. SIgA dysfunction can lead to changes in the GM and is associated with the development of various GM-related diseases. Although in early stage, recent studies have shown that assorted dietary interventions, including vitamins, amino acids, fatty acids, polyphenols, oligo/polysaccharides, and probiotics, can influence the intestinal SIgA response and SIgA-GM interaction. Dietary intervention can enhance the SIgA response by directly regulating it (from top to bottom) or by regulating the GM structure or gene expression (from bottom to top). Furthermore, intensive studies involving the particular influence of dietary intervention on SIgA-binding to the GM and SIgA repertoire and the precise regulation of the SIgA response via dietary intervention are still exceedingly scarce and merit further consideration. This review summarizes the existing knowledge and (possible) mechanisms of the influence of dietary intervention on the SIgA-GM interaction. Key issues are considered, and the approaches in addressing these issues in future studies are also discussed.
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Affiliation(s)
- Xue Han
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing
| | - Jielong Guo
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Yue Qin
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Weidong Huang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Yilin You
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Jicheng Zhan
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
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35
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Chang X, Krenger P, Krueger CC, Zha L, Han J, Yermanos A, Roongta S, Mohsen MO, Oxenius A, Vogel M, Bachmann MF. TLR7 Signaling Shapes and Maintains Antibody Diversity Upon Virus-Like Particle Immunization. Front Immunol 2022; 12:827256. [PMID: 35126381 PMCID: PMC8807482 DOI: 10.3389/fimmu.2021.827256] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 12/27/2021] [Indexed: 12/12/2022] Open
Abstract
Virus-like particles (VLPs) are used in different marketed vaccines and are able to induce potent antibody responses. The innate pattern recognition receptors TLR7/8 recognize single stranded (ss) RNA naturally packaged into some VLPs and have been shown to enhance the production of IgG antibodies upon immunization. Here we demonstrate that, upon immunization with RNA-loaded bacteriophage-derived VLP Qβ, TLR7 signaling accelerates germinal center formation, promotes affinity/avidity maturation of VLP-specific IgG and isotype switching to IgG2b/2c. These findings extrapolated to antigens displayed on Qβ; as Fel d 1, the major cat allergen, chemically attached to Qβ also induced higher affinity/avidity IgG2b/2c antibodies in a TLR7-dependent fashion. Chimeric mice lacking TLR7-expression exclusively in B cells demonstrated that the enhanced IgG responses were driven by a B cell intrinsic mechanism. Importantly, deep sequencing of the BCR repertoire of antigen-specific B cells demonstrated higher diversity in mice with TLR7 signaling in B cells, suggesting that TLR7-signaling drives BCR repertoire development and diversity. Furthermore, the current data demonstrate that high levels of clonal diversity are reached early in the response and maintained by TLR7 signaling. In conclusion, TLR7 signaling enhances levels and quality of IgG antibodies, and this finding has major implications for vaccine design.
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Affiliation(s)
- Xinyue Chang
- Department of Rheumatology & Immunology, University Hospital Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Pascal Krenger
- Department of Rheumatology & Immunology, University Hospital Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Caroline C. Krueger
- Department of Rheumatology & Immunology, University Hospital Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Lisha Zha
- International Immunology Centre, Anhui Agricultural University, Hefei, China
| | - Jiami Han
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH), Zürich, Basel, Switzerland
| | - Alexander Yermanos
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH), Zürich, Basel, Switzerland
- Institute of Microbiology, Eidgenössische Technische Hochschule Zürich, Zurich, Switzerland
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Salony Roongta
- Department of Rheumatology & Immunology, University Hospital Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Mona O. Mohsen
- Department of Rheumatology & Immunology, University Hospital Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Annette Oxenius
- Institute of Microbiology, Eidgenössische Technische Hochschule Zürich, Zurich, Switzerland
| | - Monique Vogel
- Department of Rheumatology & Immunology, University Hospital Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Martin F. Bachmann
- Department of Rheumatology & Immunology, University Hospital Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- International Immunology Centre, Anhui Agricultural University, Hefei, China
- Jenner Institute, University of Oxford, Oxford, United Kingdom
- *Correspondence: Martin F. Bachmann,
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36
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Zhang L, Chu CQ. Gut Microbiota-Medication Interaction in Rheumatic Diseases. Front Immunol 2021; 12:796865. [PMID: 34925383 PMCID: PMC8678121 DOI: 10.3389/fimmu.2021.796865] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 11/15/2021] [Indexed: 02/05/2023] Open
Abstract
Besides its contribution to the development of rheumatic diseases, the gut microbiota interact with anti-rheumatic drugs. The intestinal microbiota can directly metabolize many drugs and indirectly change drug metabolism through a complex multi-dimensional interaction with the host, thus affecting individual response to drug therapy and adverse effects. The focus of the current review is to address recent advances and important progress in our understanding of how the gut microbiota interact with anti-rheumatic drugs and provide perspectives on promoting precision treatment, drug discovery, and better therapy for rheumatic diseases.
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Affiliation(s)
- Lingshu Zhang
- Department of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu, China.,Division of Arthritis and Rheumatic Diseases, Oregon Health & Science University, Portland, OR, United States
| | - Cong-Qiu Chu
- Division of Arthritis and Rheumatic Diseases, Oregon Health & Science University, Portland, OR, United States.,Section of Rheumatology, Veterans Affairs (VA) Portland Healthcare System, Portland, OR, United States
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37
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Zhong Z, Nan K, Weng M, Yue Y, Zhou W, Wang Z, Chu Y, Liu R, Miao C. Pro- and Anti- Effects of Immunoglobulin A- Producing B Cell in Tumors and Its Triggers. Front Immunol 2021; 12:765044. [PMID: 34868013 PMCID: PMC8640120 DOI: 10.3389/fimmu.2021.765044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/01/2021] [Indexed: 12/18/2022] Open
Abstract
B cells are well known as key mediators of humoral immune responses via the production of antibodies. Immunoglobulin A (IgA) is the most abundantly produced antibody isotype and provides the first line of immune protection at mucosal surfaces. However, IgA has long been a divisive molecule with respect to tumor progression. IgA exerts anti- or pro-tumor effect in different tumor types. In this review, we summarize emerging evidence regarding the production and effects of IgA and IgA+ cells in the tumor microenvironment (TME). Moreover, we discuss that the TME cytokines, host diet, microbiome, and metabolites play a pivotal role in controlling the class-switch recombination (CSR) of IgA. The analysis of intratumoral Ig repertoires and determination of metabolites that influence CSR may help establish novel therapeutic targets for the treatment of cancers.
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Affiliation(s)
- Ziwen Zhong
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China.,Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Ke Nan
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Meilin Weng
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ying Yue
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Wenchang Zhou
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhiqiang Wang
- Department of Immunology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Yiwei Chu
- Department of Immunology, School of Basic Medical Sciences, Fudan University, Shanghai, China.,Shanghai Fifth People's Hospital and Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Ronghua Liu
- Shanghai Fifth People's Hospital and Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Changhong Miao
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
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38
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Oemcke LA, Anderson RC, Altermann E, Roy NC, McNabb WC. The Role of Segmented Filamentous Bacteria in Immune Barrier Maturation of the Small Intestine at Weaning. Front Nutr 2021; 8:759137. [PMID: 34869529 PMCID: PMC8637878 DOI: 10.3389/fnut.2021.759137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 10/25/2021] [Indexed: 11/24/2022] Open
Abstract
The microbiological, physical, chemical, and immunological barriers of the gastrointestinal tract (GIT) begin developing in utero and finish maturing postnatally. Maturation of these barriers is essential for the proper functioning of the GIT. Maturation, particularly of the immunological barrier, involves stimulation by bacteria. Segmented filamentous bacteria (SFB) which are anaerobic, spore-forming commensals have been linked to immune activation. The presence and changes in SFB abundance have been positively correlated to immune markers (cytokines and immunoglobulins) in the rat ileum and stool samples, pre- and post-weaning. The abundance of SFB in infant stool increases from 6 months, peaks around 12 months and plateaus 25 months post-weaning. Changes in SFB abundance at these times correlate positively and negatively with the production of interleukin 17 (IL 17) and immunoglobulin A (IgA), respectively, indicating involvement in immune function and maturation. Additionally, the peak in SFB abundance when a human milk diet was complemented by solid foods hints at a diet effect. SFB genome analysis revealed enzymes involved in metabolic pathways for survival, growth and development, host mucosal attachment and substrate acquisition. This narrative review discusses the current knowledge of SFB and their suggested effects on the small intestine immune system. Referencing the published genomes of rat and mouse SFB, the use of food substrates to modulate SFB abundance is proposed while considering their effects on other microbes. Changes in the immune response caused by the interaction of food substrate with SFB may provide insight into their role in infant immunological barrier maturation.
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Affiliation(s)
- Linda A Oemcke
- Riddet Institute, Massey University, Palmerston North, New Zealand.,School of Food and Advanced Technology, Massey University, Palmerston North, New Zealand.,Smart Foods Innovation Centre of Excellence, AgResearch, Palmerston North, New Zealand
| | - Rachel C Anderson
- Riddet Institute, Massey University, Palmerston North, New Zealand.,Smart Foods Innovation Centre of Excellence, AgResearch, Palmerston North, New Zealand
| | - Eric Altermann
- Riddet Institute, Massey University, Palmerston North, New Zealand.,Consumer Interface Innovation Centre of Excellence, AgResearch, Palmerston North, New Zealand.,High-Value Nutrition National Science Challenge, Auckland, New Zealand
| | - Nicole C Roy
- Riddet Institute, Massey University, Palmerston North, New Zealand.,High-Value Nutrition National Science Challenge, Auckland, New Zealand.,Department of Human Nutrition, University of Otago, Dunedin, New Zealand
| | - Warren C McNabb
- Riddet Institute, Massey University, Palmerston North, New Zealand.,High-Value Nutrition National Science Challenge, Auckland, New Zealand
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39
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Liu J, Shulman Z. Affinity-based clonal selection in Peyer's patches. Curr Opin Immunol 2021; 74:100-105. [PMID: 34847473 DOI: 10.1016/j.coi.2021.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 11/07/2021] [Accepted: 11/08/2021] [Indexed: 11/19/2022]
Abstract
Effective long-lasting immunity depends on the generation of protective antibodies that restrict the invasion of harmful pathogens. The germinal center (GC) is a microanatomical site at which B cells acquire random somatic mutations in their immunoglobulin genes followed by affinity-based selection. Whereas this process was extensively studied in lymph nodes and spleen, less is known about GCs located in mucosal tissues lymphoid organs, such as the Peyer's patches (PPs). These lymphoid organs have a special structure and host a unique niche known as the subepithelial dome (SED), where B cell activation and class switch recombination to IgA take place before GC seeding. As opposed to typical lymph-nodes, the PPs host chronic GC reactions that are driven by gut-bacteria. Direct evidence for antibody affinity maturation in PPs, and competition between B cells for T cell help was recently obtained. Here, we discuss these findings and how they complement each other.
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Affiliation(s)
- Jingjing Liu
- Department of Immunology, Weizmann Institute of Science, Rehovot, Israel
| | - Ziv Shulman
- Department of Immunology, Weizmann Institute of Science, Rehovot, Israel.
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40
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Seikrit C, Pabst O. The immune landscape of IgA induction in the gut. Semin Immunopathol 2021; 43:627-637. [PMID: 34379174 PMCID: PMC8551147 DOI: 10.1007/s00281-021-00879-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 06/09/2021] [Indexed: 12/14/2022]
Abstract
Antibodies are key elements of protective immunity. In the mucosal immune system in particular, secretory immunoglobulin A (SIgA), the most abundantly produced antibody isotype, protects against infections, shields the mucosal surface from toxins and environmental factors, and regulates immune homeostasis and a peaceful coexistence with our microbiota. However, the dark side of IgA biology promotes the formation of immune complexes and provokes pathologies, e.g., IgA nephropathy (IgAN). The precise mechanisms of how IgA responses become deregulated and pathogenic in IgAN remain unresolved. Yet, as the field of microbiota research moved into the limelight, our basic understanding of IgA biology has been taking a leap forward. Here, we discuss the structure of IgA, the anatomical and cellular foundation of mucosal antibody responses, and current concepts of how we envision the interaction of SIgA and the microbiota. We center on key concepts in the field while taking account of both historic findings and exciting new observations to provide a comprehensive groundwork for the understanding of IgA biology from the perspective of a mucosal immunologist.
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Affiliation(s)
- Claudia Seikrit
- Division of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany
| | - Oliver Pabst
- Institute of Molecular Medicine, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany.
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41
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Abstract
IgA mediates microbial homeostasis at the intestinal mucosa. Within the gut, IgA acts in a context-dependent manner to both prevent and promote bacterial colonization and to influence bacterial gene expression, thus providing exquisite control of the microbiota. IgA-microbiota interactions are highly diverse across individuals and populations, yet the factors driving this variation remain poorly understood. In this Review, we summarize evidence for the host, bacterial and environmental factors that influence IgA-microbiota interactions. Recent advances have helped to clarify the antigenic specificity and immune selection of intestinal IgA and have highlighted the importance of microbial glycan recognition. Furthermore, emerging evidence suggests that diet and nutrition play an important role in shaping IgA recognition of the microbiota. IgA-microbiota interactions are disrupted during both overnutrition and undernutrition and may be altered dynamically in response to diet, with potential implications for host health. We situate this research in the context of outstanding questions and future directions in order to better understand the fascinating paradigm of IgA-microbiota homeostasis.
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42
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Shevyrev D, Tereshchenko V, Kozlov V. Immune Equilibrium Depends on the Interaction Between Recognition and Presentation Landscapes. Front Immunol 2021; 12:706136. [PMID: 34394106 PMCID: PMC8362327 DOI: 10.3389/fimmu.2021.706136] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 07/12/2021] [Indexed: 12/15/2022] Open
Abstract
In this review, we described the structure and organization of antigen-recognizing repertoires of B and T cells from the standpoint of modern immunology. We summarized the latest advances in bioinformatics analysis of sequencing data from T and B cell repertoires and also presented contemporary ideas about the mechanisms of clonal diversity formation at different stages of organism development. At the same time, we focused on the importance of the allelic variants of the HLA genes and spectra of presented antigens for the formation of T-cell receptors (TCR) landscapes. The main idea of this review is that immune equilibrium and proper functioning of immunity are highly dependent on the interaction between the recognition and the presentation landscapes of antigens. Certain changes in these landscapes can occur during life, which can affect the protective function of adaptive immunity. We described some mechanisms associated with these changes, for example, the conversion of effector cells into regulatory cells and vice versa due to the trans-differentiation or bystander effect, changes in the clonal organization of the general TCR repertoire due to homeostatic proliferation or aging, and the background for the altered presentation of some antigens due to SNP mutations of MHC, or the alteration of the presenting antigens due to post-translational modifications. The authors suggest that such alterations can lead to an increase in the risk of the development of oncological and autoimmune diseases and influence the sensitivity of the organism to different infectious agents.
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Affiliation(s)
- Daniil Shevyrev
- Laboratory of Clinical Immunopathology, Research Institute for Fundamental and Clinical Immunology, Novosibirsk, Russia
| | - Valeriy Tereshchenko
- Laboratory of Molecular Immunology, Research Institute for Fundamental and Clinical Immunology, Novosibirsk, Russia
| | - Vladimir Kozlov
- Laboratory of Clinical Immunopathology, Research Institute for Fundamental and Clinical Immunology, Novosibirsk, Russia
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43
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Bemark M, Angeletti D. Know your enemy or find your friend?-Induction of IgA at mucosal surfaces. Immunol Rev 2021; 303:83-102. [PMID: 34331314 PMCID: PMC7612940 DOI: 10.1111/imr.13014] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 06/28/2021] [Indexed: 12/15/2022]
Abstract
Most antibodies produced in the body are of the IgA class. The dominant cell population producing them are plasma cells within the lamina propria of the gastrointestinal tract, but many IgA-producing cells are also found in the airways, within mammary tissues, the urogenital tract and inside the bone marrow. Most IgA antibodies are transported into the lumen by epithelial cells as part of the mucosal secretions, but they are also present in serum and other body fluids. A large part of the commensal microbiota in the gut is covered with IgA antibodies, and it has been demonstrated that this plays a role in maintaining a healthy balance between the host and the bacteria. However, IgA antibodies also play important roles in neutralizing pathogens in the gastrointestinal tract and the upper airways. The distinction between the two roles of IgA - protective and balance-maintaining - not only has implications on function but also on how the production is regulated. Here, we discuss these issues with a special focus on gut and airways.
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Affiliation(s)
- Mats Bemark
- Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Davide Angeletti
- Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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44
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Stutz R, Meyer C, Kaiser E, Goedicke-Fritz S, Schroeder HW, Bals R, Haertel C, Rogosch T, Kerzel S, Zemlin M. Attenuated asthma phenotype in mice with a fetal-like antigen receptor repertoire. Sci Rep 2021; 11:14199. [PMID: 34244568 PMCID: PMC8270943 DOI: 10.1038/s41598-021-93553-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 06/21/2021] [Indexed: 11/09/2022] Open
Abstract
We hypothesized that the scarcity of N-nucleotides might contribute to the inability of the neonate to mount a robust allergic immune response. To test this, we used terminal deoxyribunucleotidyl Transferase deficient (TdT-/-) mice, which express "fetal-like" T cell receptor and immunoglobulin repertoires with largely germline-encoded CDR3 regions. Intraperitoneal sensitization was followed by aerosol provocation with either PBS or the allergen OVA in both TdT-/- mice and wild-type mice to develop allergic respiratory inflammation. The effects of this procedure were investigated by lung function test, immunological analysis of serum and brochoalveolar lavage. The local TH2 cytokine milieu was significantly attenuated in TdT-/- mice. Within this group, the induction of total IgE levels was also significantly reduced after sensitization. TdT-/- mice showed a tendency toward reduced eosinophilic inflow into the bronchial tubes, which was associated with the elimination of respiratory hyperreactivity. In conclusion, in a murine model of allergic airway inflammation, the expression of fetal-like antigen receptors was associated with potent indications of a reduced ability to mount an asthma phenotype. This underlines the importance of somatically-generated antigen-receptor repertoire diversity in type one allergic immune responses and suggests that the fetus may be protected from allergic responses, at least in part, by controlling N addition.
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Affiliation(s)
- Regine Stutz
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany
| | - Christopher Meyer
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany
| | - Elisabeth Kaiser
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany
| | - Sybelle Goedicke-Fritz
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany.,Department of Pediatrics, Philipps-University Marburg, Marburg, Germany
| | - Harry W Schroeder
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Robert Bals
- Department of Internal Medicine V-Pulmonology, Allergology and Critical Care Medicine, Saarland University, Saarland University Medical School, Homburg, Germany
| | - Christoph Haertel
- Department of Pediatrics, Würzburg University Medical Center, Würzburg, Germany
| | - Tobias Rogosch
- Department of Pediatrics, Philipps-University Marburg, Marburg, Germany
| | - Sebastian Kerzel
- Department of Pediatrics, Philipps-University Marburg, Marburg, Germany.,Department of Pediatric Pneumology and Allergy, University Children's Hospital Regensburg, Campus St. Hedwig, Regensburg, Germany
| | - Michael Zemlin
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany. .,Department of Pediatrics, Philipps-University Marburg, Marburg, Germany.
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45
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Xin J, Zeng D, Wang H, Sun N, Zhao Y, Dan Y, Pan K, Jing B, Ni X. Probiotic Lactobacillus johnsonii BS15 Promotes Growth Performance, Intestinal Immunity, and Gut Microbiota in Piglets. Probiotics Antimicrob Proteins 2021; 12:184-193. [PMID: 30617949 DOI: 10.1007/s12602-018-9511-y] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Numerous studies have investigated the beneficial effects of Lactobacillus johnsonii strain BS15 on mice and broilers. This study aimed to understand the growth-promoting effects of BS15 on piglets. We determined the effects of L. johnsonii BS15 and a commercial probiotic strain, Bacillus subtilis JS01. Seventy-two suckling piglets (1 ± 2-day-old) were divided into three groups and fed with diets supplemented with 1 × 106 colony-forming units (cfu) BS15 per gram of feed (BS15 group); 1 × 106 cfu JS01 per gram of feed (JS01 group); or de Man, Rogosa, and Sharpe liquid medium (control group) 35 days. Compared with JS01, BS15 significantly improved the daily weight gain and diarrhea index of the piglets. The BS15 group had higher fecal sIgA levels, whereas the JS01 group had high fecal sIgA levels only after 35 days of treatment. Additionally, BS15 altered T cell subsets in peripheral blood by significantly increasing the CD3+CD4+ T cell percentage and CD3+CD4+/CD3+CD8+ ratio and decreasing the CD3+CD8+ T cell percentage. Moreover, BS15 exerted better beneficial effects on fecal microbiota than JS01. Specifically, the BS15 group had markedly increased Clostridium, Peptococcus, and Lactobacillus populations on days 7 and 21 of treatment and reduced Escherichia coli populations on day 35 of treatment. These findings indicated that BS15 can be applied as a probiotic that promotes growth performance and controls diarrhea in piglets.
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Affiliation(s)
- Jinge Xin
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Dong Zeng
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Hesong Wang
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ning Sun
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ying Zhao
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yan Dan
- Chongqing Fishery Sciences Research Institute, Chongqing, China
| | - Kangcheng Pan
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Bo Jing
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xueqin Ni
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China.
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46
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Wagner C, Torow N, Hornef MW, Lelouard H. Spatial and temporal key steps in early-life intestinal immune system development and education. FEBS J 2021; 289:4731-4757. [PMID: 34076962 DOI: 10.1111/febs.16047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/15/2021] [Accepted: 06/01/2021] [Indexed: 12/15/2022]
Abstract
Education of our intestinal immune system early in life strongly influences adult health. This education strongly relies on series of events that must occur in well-defined time windows. From initial colonization by maternal-derived microbiota during delivery to dietary changes from mother's milk to solid foods at weaning, these early-life events have indeed long-standing consequences on our immunity, facilitating tolerance to environmental exposures or, on the contrary, increasing the risk of developing noncommunicable diseases such as allergies, asthma, obesity, and inflammatory bowel diseases. In this review, we provide an outline of the recent advances in our understanding of these events and how they are mechanistically related to intestinal immunity development and education. First, we review the susceptibility of neonates to infections and inflammatory diseases, related to their immune system and microbiota changes. Then, we highlight the maternal factors involved in protection and education of the mucosal immune system of the offspring, the role of the microbiota, and the nature of neonatal immune system until weaning. We also present how the development of some immune responses is intertwined in temporal and spatial windows of opportunity. Finally, we discuss pending questions regarding the neonate particular immune status and the activation of the intestinal immune system at weaning.
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Affiliation(s)
- Camille Wagner
- Aix Marseille Univ, CNRS, INSERM, CIML, Marseille, France
| | - Natalia Torow
- Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Mathias W Hornef
- Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
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47
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Liu L, Chen D, Yu B, Yin H, Huang Z, Luo Y, Zheng P, Mao X, Yu J, Luo J, Yan H, He J. Fructooligosaccharides improve growth performance and intestinal epithelium function in weaned pigs exposed to enterotoxigenic Escherichia coli. Food Funct 2021; 11:9599-9612. [PMID: 33151222 DOI: 10.1039/d0fo01998d] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
To explore the protective effect of Fructooligosaccharides (FOS) against Enterotoxigenic Escherichia coli (ETEC)-induced inflammation and intestinal injury, twenty-four weaned pigs were randomly assigned into three groups: (1) non-challenge (CON, fed with basal diet), (2) ETEC-challenge (ECON, fed with basal diet), and (3) ETEC challenge + FOS treatment (EFOS, fed with basal diet plus 2.5 g kg-1 FOS). On day 19, the CON group was orally infused with sterilized culture while pigs in the ECON group and EFOS group were orally infused with ETEC (2.5 × 1011 colony-forming units). After 3 days, pigs were slaughtered for sample collection. We showed that ETEC challenge significantly reduced average daily gain (ADG); however, FOS improved the ADG (P < 0.05), apparent digestibility of crude protein (CP), gross energy (GE), and ash and reduced the diarrhea incidence (P < 0.05). FOS reduced plasma concentrations of IL-1β and TNF-α and down-regulated (P < 0.05) the mRNA expression of IL-6 and TNF-α in the jejunum and ileum as well as IL-1β and TNF-α in the duodenum. The concentrations of plasma immunoglobulin A (IgA), immunoglobulin M (IgM) and secreted IgA (SIgA) in the jejunum (P < 0.05) were elevated. Interestingly, FOS elevated the villus height in the duodenum, and elevated the ratio of villus height to crypt depth in the duodenum and ileum in the EFOS group pigs (P < 0.05). Moreover, FOS increased lactase activity in the duodenum and ileum (P < 0.05). The activities of sucrase and alkaline phosphatase (AKP) were higher in the EFOS group than in the ECON group (P < 0.05). Importantly, FOS up-regulated the expressions of critical genes in intestinal epithelium function such as zonula occludens-1 (ZO-1), L-type amino acid transporter-1 (LAT1), and cationic amino acid transporter-1 (CAT1) in the duodenum and the expressions of ZO-1 and glucose transporter-2 (GLUT2) in the jejunum (P < 0.05). FOS also up-regulated the expressions of occludin, fatty acid transporter-4 (FATP4), sodium glucose transport protein 1 (SGLT1), and GLUT2 in the ileum (P < 0.05). FOS significantly increased the concentrations of acetic acid, propionic acid and butyric acid in the cecal digesta. Additionally, FOS reduced the populations of Escherichia coli, but elevated the populations of Bacillus and Bifidobacterium in the caecal digesta (P < 0.05). These results suggested that FOS could improve the growth performance and intestinal health in weaned pigs upon ETEC challenge, which was associated with suppressed inflammatory responses and improved intestinal epithelium functions and microbiota.
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Affiliation(s)
- Lei Liu
- Institute of Animal Nutrition, Sichuan Agricultural University, Sichuan Province, Chengdu, 611130, P. R. China.
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48
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Gonçalves E, Guillén Y, Lama JR, Sanchez J, Brander C, Paredes R, Combadière B. Host Transcriptome and Microbiota Signatures Prior to Immunization Profile Vaccine Humoral Responsiveness. Front Immunol 2021; 12:657162. [PMID: 34040607 PMCID: PMC8141841 DOI: 10.3389/fimmu.2021.657162] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/16/2021] [Indexed: 11/28/2022] Open
Abstract
The identification of new biomarkers is essential to predict responsiveness to vaccines. We investigated the whole-blood transcriptome and microbiome prior to immunization, in order to assess their involvement in induction of humoral responses two months later. We based our analyses on stool and skin microbiota, and blood transcriptome prior to immunization, in a randomized clinical study in which participants were vaccinated with the MVA-HIV clade B vaccine (MVA-B). We found that the levels of neutralizing antibody responses were correlated with abundance of Eubacterium in stool and Prevotella in skin. In addition, genus diversity and bacterial species abundance were also correlated with the expression of genes involved in B cell development prior to immunization and forecast strong responders to MVA-B. To our knowledge, this is the first study integrating host blood gene expression and microbiota that might open an avenue of research in this field and to optimize vaccination strategies and predict responsiveness to vaccines.
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Affiliation(s)
- Elena Gonçalves
- Sorbonne Université, INSERM, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Yolanda Guillén
- IrsiCaixa AIDS Research Institute-HIVACAT, Hospital Universitari Germans Trias i Pujol, Barcelona, Spain
| | - Javier R Lama
- Asociacion Civil Impacta Salud y Educacion, Lima, Peru
| | - Jorge Sanchez
- Centro de Investigaciones Tecnológicas, Biomedicas y Medioambientales, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Christian Brander
- IrsiCaixa AIDS Research Institute-HIVACAT, Hospital Universitari Germans Trias i Pujol, Barcelona, Spain.,Faculty of Medicine, Universitat de Vic-Central de Catalunya (UVic-UCC), Vic, Spain.,Institució Catalana de Recerca I Estudis Avançats (ICREA), Barcelona, Spain
| | - Roger Paredes
- Infectious Diseases Department, Hospital Universitari Germans Trias, Barcelona, Spain
| | - Behazine Combadière
- Sorbonne Université, INSERM, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
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49
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Keppler SJ, Goess MC, Heinze JM. The Wanderings of Gut-Derived IgA Plasma Cells: Impact on Systemic Immune Responses. Front Immunol 2021; 12:670290. [PMID: 33936114 PMCID: PMC8081896 DOI: 10.3389/fimmu.2021.670290] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 03/26/2021] [Indexed: 12/12/2022] Open
Abstract
Humoral immunity is mainly mediated by a B cell population highly specialized to synthesize and secrete large quantities of antibodies – the antibody-secreting cells (ASC). In the gastrointestinal environment, a mixture of foreign antigens from the diet, commensal microbiota as well as occasional harmful pathogens lead to a constant differentiation of B cells into ASC. Due to this permanent immune response, more than 80% of mammalian ASC reside in the gut, of which most express immunoglobulin A (IgA). IgA antibodies contribute to intestinal homeostasis and can mediate protective immunity. Recent evidence points at a role for gut-derived ASC in modulating immune responses also outside of mucosal tissues. We here summarize recent evidence for wandering ASC, their antibodies and their involvement in systemic immune responses.
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Affiliation(s)
- Selina J Keppler
- School of Medicine, Institute for Clinical Chemistry and Pathobiochemistry, Technical University Munich, Munich, Germany.,TranslaTUM, Centre for Translational Cancer Research, Technical University Munich, Munich, Germany
| | - Marie Christine Goess
- School of Medicine, Institute for Clinical Chemistry and Pathobiochemistry, Technical University Munich, Munich, Germany.,TranslaTUM, Centre for Translational Cancer Research, Technical University Munich, Munich, Germany
| | - Julia M Heinze
- School of Medicine, Institute for Clinical Chemistry and Pathobiochemistry, Technical University Munich, Munich, Germany.,TranslaTUM, Centre for Translational Cancer Research, Technical University Munich, Munich, Germany
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50
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Guo J, Han X, Huang W, You Y, Jicheng Z. Interaction between IgA and gut microbiota and its role in controlling metabolic syndrome. Obes Rev 2021; 22:e13155. [PMID: 33150692 DOI: 10.1111/obr.13155] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 02/06/2023]
Abstract
Immunoglobulin A (IgA) is the most abundant immunoglobulin isotype secreted into the mucosal tissues, mainly intestinal mucus. Humans can produce several grams of IgA every day, accounting for three quarters of the body's total immunoglobulin content. IgA, together with mucus and antimicrobial peptides, forms the first line of defence for intestinal epithelial cells, protecting them from a significant number of intestinal antigens. IgA also plays a principal role in controlling the gut microbiota (GM), and disruption in IgA can result in dysbiosis, such as the enrichment of Proteobacteria, which are generally bound by IgA. Proteobacteria overexpansion is also usually seen in obesity and colitis. Consistent with this, IgA dysfunction frequently results in metabolic syndrome (MetS), including conditions such as obesity, adiposity, insulin resistance, and inflammation. In contrast, enhanced IgA function can improve, and even prevent, MetS. Interactions among IgA, GM, and metabolism provide a promising avenue to combat MetS.
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Affiliation(s)
- Jielong Guo
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural University, Beijing, China
| | - Xue Han
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural University, Beijing, China
| | - Weidong Huang
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural University, Beijing, China
| | - Yilin You
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural University, Beijing, China
| | - Zhan Jicheng
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural University, Beijing, China
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