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Gilbert JA, Azad MB, Bäckhed F, Blaser MJ, Byndloss M, Chiu CY, Chu H, Dugas LR, Elinav E, Gibbons SM, Gilbert KE, Henn MR, Ishaq SL, Ley RE, Lynch SV, Segal E, Spector TD, Strandwitz P, Suez J, Tropini C, Whiteson K, Knight R. Clinical translation of microbiome research. Nat Med 2025; 31:1099-1113. [PMID: 40217076 DOI: 10.1038/s41591-025-03615-9] [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: 10/27/2024] [Accepted: 02/26/2025] [Indexed: 04/18/2025]
Abstract
The landscape of clinical microbiome research has dramatically evolved over the past decade. By leveraging in vivo and in vitro experimentation, multiomic approaches and computational biology, we have uncovered mechanisms of action and microbial metrics of association and identified effective ways to modify the microbiome in many diseases and treatment modalities. This Review explores recent advances in the clinical application of microbiome research over the past 5 years, while acknowledging existing barriers and highlighting opportunities. We focus on the translation of microbiome research into clinical practice, spearheaded by Food and Drug Administration (FDA)-approved microbiome therapies for recurrent Clostridioides difficile infections and the emerging fields of microbiome-based diagnostics and therapeutics. We highlight key examples of studies demonstrating how microbiome mechanisms, metrics and modifiers can advance clinical practice. We also discuss forward-looking perspectives on key challenges and opportunities toward integrating microbiome data into routine clinical practice, precision medicine and personalized healthcare and nutrition.
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Affiliation(s)
- Jack A Gilbert
- Department of Pediatrics, University of California San Diego, La Jolla, CA, USA.
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA.
- Center for Microbiome Innovation, University of California San Diego, La Jolla, CA, USA.
| | - Meghan B Azad
- Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
- Manitoba Interdisciplinary Lactation Centre, Children's Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada
- CIFAR Humans & the Microbiome Program, CIFAR, Toronto, Ontario, Canada
| | - Fredrik Bäckhed
- Wallenberg Laboratory and Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Physiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Martin J Blaser
- CIFAR Humans & the Microbiome Program, CIFAR, Toronto, Ontario, Canada
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ, USA
| | - Mariana Byndloss
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
- Howard Hughes Medical Institute, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Charles Y Chiu
- Department of Laboratory Medicine, University of California, San Fransisco, San Francisco, CA, USA
- Department of Medicine, Division of Infectious Diseases, University of California, San Fransisco, San Francisco, CA, USA
- Chan-Zuckerberg Biohub, San Francisco, CA, USA
| | - Hiutung Chu
- Center for Microbiome Innovation, University of California San Diego, La Jolla, CA, USA
- Department of Pathology, University of California San Diego, La Jolla, CA, USA
- Chiba University-UC San Diego Center for Mucosal Immunology, Allergy and Vaccines, La Jolla, CA, USA
| | - Lara R Dugas
- Public Health Sciences, Parkinson School of Health Sciences and Public Health, Loyola University Chicago, Maywood, IL, USA
- Division of Epidemiology and Biostatistics, School of Public Health, University of Cape Town, Cape Town, South Africa
| | - Eran Elinav
- Department of Systems Immunology, Weizmann Institute of Science, Rehovot, Israel
- Microbiome and Cancer Division, DKFZ, Heidelberg, Germany
| | - Sean M Gibbons
- Institute for Systems Biology, Seattle, WA, USA
- Department of Bioengineering, University of Washington, Seattle, WA, USA
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
- eScience Institute, University of Washington, Seattle, WA, USA
| | - Katharine E Gilbert
- Center for Microbiome Innovation, University of California San Diego, La Jolla, CA, USA
| | | | - Suzanne L Ishaq
- School of Food and Agriculture, University of Maine, Orono, ME, USA
- Microbes and Social Equity working group, Orono, ME, USA
| | - Ruth E Ley
- Department of Microbiome Science, Max Planck Institute for Biology, Tübingen, Germany
| | - Susan V Lynch
- Benioff Center for Microbiome Medicine, Division of Gastroenterology, Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Eran Segal
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel
| | - Tim D Spector
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
- ZOE Ltd, London, UK
| | | | - Jotham Suez
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Carolina Tropini
- CIFAR Humans & the Microbiome Program, CIFAR, Toronto, Ontario, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, British Columbia, Canada
| | - Katrine Whiteson
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, USA
| | - Rob Knight
- Department of Pediatrics, University of California San Diego, La Jolla, CA, USA
- Center for Microbiome Innovation, University of California San Diego, La Jolla, CA, USA
- Department of Computer Science and Engineering, University of California San Diego, San Diego, CA, USA
- Shu Chien-Gene Lay Department of Bioengineering, University of California San Diego, San Diego, CA, USA
- Halıcıoğlu Data Science Institute, University of California San Diego, San Diego, CA, USA
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2
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Saadawi A, Mair F, Rosenwald E, Hoces D, Slack E, Kopf M. Investigating Polyreactivity of CD4 + T Cells to the Intestinal Microbiota. Eur J Immunol 2025; 55:e202451484. [PMID: 40223653 DOI: 10.1002/eji.202451484] [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: 08/28/2024] [Revised: 03/12/2025] [Accepted: 03/13/2025] [Indexed: 04/15/2025]
Abstract
Antigen-specific recognition of microbiota by T cells enforces tolerance at homeostasis. Conversely, dysbiosis leads to imbalanced T-cell responses, triggering inflammatory and autoimmune diseases. Despite their significance, the identities of immunogenic microbial antigens remain largely enigmatic. Here, we leveraged a sensitive, unbiased, genome-wide screening platform to identify peptides from Akkermansia muciniphila (AKK) and Bacteroides thetaiotaomicron (BT) recognized by CD4+ T cells. The platform is based on screening peptide libraries using an NFAT-fluorescence reporter cell line transduced with a retrovirus encoding an MHC-TCR (MCR) hybrid molecule. We discovered several novel epitopes from AKK and BT. T-cell hybridomas reactive to AKK and BT bacteria demonstrated polyreactivity to microbiota-derived peptides in co-cultures with MCR reporter cells. Steady-state T cells recognized these epitopes in an MHC-restricted fashion. Intriguingly, most of the identified epitopes are broadly conserved within the given phylum and originate from membrane and intracellular proteins. Ex vivo stimulation of CD4+ T cells from mice vaccinated with the identified peptides revealed mono-specific IFN-γ and IL-17 responses. Our work showcases the potential of the MCR system for identifying immunogenic microbial epitopes, providing a valuable resource. Our study facilitates decoding antigen specificity in immune system-bacterial interactions, with applications in understanding microbiome and pathogenic bacterial immunity.
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Affiliation(s)
- Ahmed Saadawi
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
| | - Florian Mair
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
| | - Esther Rosenwald
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
| | - Daniel Hoces
- Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland
| | - Emma Slack
- Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland
| | - Manfred Kopf
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
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3
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Helliwell E, Rauch I, Nice T, Merritt J, Kreth J. Immunostimulatory effects of Streptococcus sanguinis extracellular membrane vesicles protect oral gingival epithelial cells from periodontal pathobiont damage. Infect Immun 2025; 93:e0053524. [PMID: 39969179 PMCID: PMC11895462 DOI: 10.1128/iai.00535-24] [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: 11/25/2024] [Accepted: 01/22/2025] [Indexed: 02/20/2025] Open
Abstract
The commensal Streptococcus sanguinis is highly prevalent in the oral cavity and characterized for its ability to inhibit growth of oral pathogens. Like many other cell types, streptococci produce extracellular membrane vesicles (EMVs), which contain specific molecular cargo and facilitate interactions with host cells. We previously demonstrated that EMVs from S. sanguinis are internalized by gingival epithelial cells (GECs) without causing cell death. Our aim is to characterize the effects of vesicles on eukaryotic cells. Microscopy studies of gingival epithelial cells inoculated with EMVs from wild-type and specific deletion mutants show differential uptake, with decreased uptake of ΔSSA1099 EMVs and increased uptake of ΔSSA1882 EMVs relative to SK36 EMVs. However, EMVs from wild-type and deletion mutants showed similar patterns in cytokine and chemokine secretion. Transcriptomic analysis of gingival epithelial cells inoculated with SK36 EMVs showed a downregulation of genes implicated in apoptosis as well as interferon signaling, while showing an upregulation of genes involved in cytokine production. Gelatin zymography results show that SK36 EMVs have a contrasting result on production of MMP2/9; MMP2 production is decreased while MMP9 is increased by 48 hours post-inoculation (hpi). Dual-inoculation studies demonstrate that prior internalization of S. sanguinis EMVs protects gingival epithelial cells from exposure to pathobiont Porphyromonas gingivalis outer membrane vesicles (OMVs), preventing dissociation and cell death. Our overall findings suggest that S. sanguinis EMVs trigger an immune response on gingival epithelial cells; however, this response suggests inhibition of some immune signaling pathways. Our results highlight an important role in commensalism, in which a microbe induces an immune response but avoids damage to host cells, thus discouraging infection by pathobionts.
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Affiliation(s)
- Emily Helliwell
- Division of Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University, Portland, Oregon, USA
| | - Isabella Rauch
- Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Portland, Oregon, USA
| | - Tim Nice
- Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Portland, Oregon, USA
| | - Justin Merritt
- Division of Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University, Portland, Oregon, USA
- Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Portland, Oregon, USA
| | - Jens Kreth
- Division of Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University, Portland, Oregon, USA
- Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Portland, Oregon, USA
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4
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Vaezijoze S, Irani S, Siadat SD, Zali M. Modulation of satiety hormones by Bacteroides thetaiotaomicron, Bacteroides fragilis and their derivatives. AMB Express 2025; 15:41. [PMID: 40044987 PMCID: PMC11883081 DOI: 10.1186/s13568-025-01852-2] [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: 11/12/2024] [Accepted: 02/18/2025] [Indexed: 03/09/2025] Open
Abstract
Obesity is a complex disorder influenced by various factors, including gut microbiota, which play a crucial role in metabolic regulation. This study is aimed to investigate the effects of Bacteroides thetaiotaomicron and Bacteroides fragilis, along with their derivatives-outer membrane vesicles (OMVs) and cell-free supernatant (CFS)-on the expression and secretion of satiety hormones in the murine intestinal secretin tumor cell line (STC-1). We examined the expression of peptide YY (PYY), glucagon-like peptide-1 and -2 (GLP-1 and GLP-2, encoded by the GCG gene), the enzyme prohormone convertase-1 (PC1/PCSK1 gene), and the receptors G protein-coupled receptor 119 and 120 (GPR119 and GPR120), and G-protein-coupled bile acid receptor (TGR5). Our results demonstrate that live B. fragilis significantly increased PYY expression and secretion. B. thetaiotaomicron CFS notably upregulated GCG, PCSK1, GPR119, GPR120, and TGR5 expression, leading to elevated GLP-1 secretion. B. fragilis CFS decreased GPR119, GPR120, and GCG expression. OMVs from B. thetaiotaomicron at 50 µg/ml significantly enhanced GCG and PCSK1 expression, while B. fragilis OMVs generally decreased gene expression, except for PYY protein abundance. Inactive B. thetaiotaomicron and B. fragilis increased GCG mRNA levels and GLP-1 concentration, with inactive B. fragilis also elevating GLP-2 protein levels.This study suggests that B. thetaiotaomicron and its derivatives, particularly CFS and OMVs, have potential as next-generation probiotics, postbiotics, and paraprobiotics for modulating satiety hormones and managing obesity. Further research is warranted to explore their mechanisms and therapeutic applications in vivo.
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Affiliation(s)
- Somayeh Vaezijoze
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Shiva Irani
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Seyed Davar Siadat
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran.
- Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran.
| | - Mohammadreza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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5
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Bosteels V, Janssens S. Striking a balance: new perspectives on homeostatic dendritic cell maturation. Nat Rev Immunol 2025; 25:125-140. [PMID: 39289483 DOI: 10.1038/s41577-024-01079-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/31/2024] [Indexed: 09/19/2024]
Abstract
Dendritic cells (DCs) are crucial gatekeepers of the balance between immunity and tolerance. They exist in two functional states, immature or mature, that refer to an information-sensing versus an information-transmitting state, respectively. Historically, the term DC maturation was used to describe the acquisition of immunostimulatory capacity by DCs following their triggering by pathogens or tissue damage signals. As such, immature DCs were proposed to mediate tolerance, whereas mature DCs were associated with the induction of protective T cell immunity. Later studies have challenged this view and unequivocally demonstrated that two distinct modes of DC maturation exist, homeostatic and immunogenic DC maturation, each with a distinct functional outcome. Therefore, the mere expression of maturation markers cannot be used to predict immunogenicity. How DCs become activated in homeostatic conditions and maintain tolerance remains an area of intense debate. Several recent studies have shed light on the signals driving the homeostatic maturation programme, especially in the conventional type 1 DC (cDC1) compartment. Here, we highlight our growing understanding of homeostatic DC maturation and the relevance of this process for immune tolerance.
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Affiliation(s)
- Victor Bosteels
- Laboratory for ER Stress and Inflammation, VIB Center for Inflammation Research, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium
| | - Sophie Janssens
- Laboratory for ER Stress and Inflammation, VIB Center for Inflammation Research, Ghent, Belgium.
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium.
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6
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Strobl K, Klufa J, Jin R, Artner-Gent L, Krauß D, Novoszel P, Strobl J, Stary G, Vujic I, Griss J, Holcmann M, Farlik M, Homey B, Sibilia M, Bauer T. JAK-STAT1 as therapeutic target for EGFR deficiency-associated inflammation and scarring alopecia. EMBO Mol Med 2024; 16:3142-3168. [PMID: 39521937 PMCID: PMC11628629 DOI: 10.1038/s44321-024-00166-3] [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: 06/12/2024] [Revised: 10/18/2024] [Accepted: 10/24/2024] [Indexed: 11/16/2024] Open
Abstract
The hair follicle stem cell niche is an immune-privileged microenvironment, characterized by reduced antigen presentation, thus shielding against permanent immune-mediated tissue damage. In this study, we demonstrated the protective role of hair follicle-specific epidermal growth factor receptor (EGFR) against scarring hair follicle destruction. Mechanistically, disruption of EGFR signaling generated a cell-intrinsic hypersensitivity within the JAK-STAT1 pathway, which, synergistically with interferon gamma expressing CD8 T-cell and NK-cell-mediated inflammation, compromised the stem cell niche. Hair follicle-specific genetic depletion of either JAK1/2 or STAT1 or therapeutic inhibition of JAK1/2 ameliorated the inflammation, restored skin barrier function and activated the residual stem cells to resume hair growth in mouse models of epidermal and hair follicle-specific EGFR deletion. Skin biopsies from EGFR inhibitor-treated and cicatricial alopecia patients revealed an active JAK-STAT1 signaling signature along with upregulation of antigen presentation and downregulation of key components of the EGFR pathway. Our findings offer molecular insights and highlight a mechanism-based therapeutic strategy for addressing chronic folliculitis associated with EGFR-inhibitor anti-cancer therapy and cicatricial alopecia.
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Affiliation(s)
- Karoline Strobl
- Center for Cancer Research, Medical University of Vienna and Comprehensive Cancer Center, Vienna, 1090, Austria
| | - Jörg Klufa
- Center for Cancer Research, Medical University of Vienna and Comprehensive Cancer Center, Vienna, 1090, Austria
| | - Regina Jin
- Center for Cancer Research, Medical University of Vienna and Comprehensive Cancer Center, Vienna, 1090, Austria
| | - Lena Artner-Gent
- Center for Cancer Research, Medical University of Vienna and Comprehensive Cancer Center, Vienna, 1090, Austria
| | - Dana Krauß
- Center for Cancer Research, Medical University of Vienna and Comprehensive Cancer Center, Vienna, 1090, Austria
| | - Philipp Novoszel
- Center for Cancer Research, Medical University of Vienna and Comprehensive Cancer Center, Vienna, 1090, Austria
| | - Johanna Strobl
- Department of Dermatology, Medical University of Vienna, Vienna, 1090, Austria
| | - Georg Stary
- Department of Dermatology, Medical University of Vienna, Vienna, 1090, Austria
| | - Igor Vujic
- Department of Dermatology, Venereology and Allergy, Clinical Center Landstrasse, Vienna, 1030, Austria
| | - Johannes Griss
- Department of Dermatology, Medical University of Vienna, Vienna, 1090, Austria
| | - Martin Holcmann
- Center for Cancer Research, Medical University of Vienna and Comprehensive Cancer Center, Vienna, 1090, Austria
| | - Matthias Farlik
- Department of Dermatology, Medical University of Vienna, Vienna, 1090, Austria
| | - Bernhard Homey
- Department of Dermatology, University Hospital Düsseldorf, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Maria Sibilia
- Center for Cancer Research, Medical University of Vienna and Comprehensive Cancer Center, Vienna, 1090, Austria.
| | - Thomas Bauer
- Center for Cancer Research, Medical University of Vienna and Comprehensive Cancer Center, Vienna, 1090, Austria.
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7
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Fischer MA, Jia L, Edelblum KL. Type I IFN Induces TCR-dependent and -independent Antimicrobial Responses in γδ Intraepithelial Lymphocytes. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 213:1380-1391. [PMID: 39311642 PMCID: PMC11493514 DOI: 10.4049/jimmunol.2400138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 09/03/2024] [Indexed: 09/25/2024]
Abstract
Intraepithelial lymphocytes (IELs) expressing the TCRγδ survey the intestinal epithelium to limit the invasion of microbial pathogens. The production of type I IFN is a central component of an antiviral immune response, yet how these proinflammatory cytokines contribute to γδ IEL effector function remains unclear. Based on the unique activation status of IELs and their ability to bridge innate and adaptive immunity, we investigated the extent to which type I IFN signaling modulates γδ IEL function. Using an ex vivo culture model, we find that type I IFN alone is unable to drive IFN-γ production, yet low-level TCR activation synergizes with type I IFN to induce IFN-γ production in murine γδ IELs. Further investigation into the underlying molecular mechanisms of costimulation revealed that TCRγδ-mediated activation of NFAT and JNK is required for type I IFN to promote IFN-γ expression in a STAT4-dependent manner. Whereas type I IFN rapidly upregulates antiviral gene expression independent of a basal TCRγδ signal, neither tonic TCR triggering nor the presence of a TCR agonist was sufficient to elicit type I IFN-induced IFN-γ production in vivo. However, bypassing proximal TCR signaling events synergized with IFNAR/STAT4 activation to induce γδ IEL IFN-γ production. These findings indicate that γδ IELs contribute to host defense in response to type I IFN by mounting a rapid antimicrobial response independent of TCRγδ signaling, and may produce IFN-γ in a TCR-dependent manner under permissive conditions.
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Affiliation(s)
- Matthew A Fischer
- Center for Immunity and Inflammation, Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
- Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Luo Jia
- Center for Immunity and Inflammation, Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
| | - Karen L Edelblum
- Center for Immunity and Inflammation, Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
- Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
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8
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Lai B, Luo SF, Lai JH. Therapeutically targeting proinflammatory type I interferons in systemic lupus erythematosus: efficacy and insufficiency with a specific focus on lupus nephritis. Front Immunol 2024; 15:1489205. [PMID: 39478861 PMCID: PMC11521836 DOI: 10.3389/fimmu.2024.1489205] [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: 08/31/2024] [Accepted: 09/30/2024] [Indexed: 11/02/2024] Open
Abstract
Type I interferons (IFN-Is) are important players in the immunopathogenesis of systemic lupus erythematosus (SLE). Pathogenic events in patients with SLE are potent triggers of IFN-I induction, yet IFN-I may induce or initiate the immunopathogenesis leading to these events. Because blocking IFN-I is effective in some clinical manifestations of SLE patients, concerns about the efficacy of anti-IFN-I therapy in patients with lupus nephritis remain. Tissues from kidney biopsies of patients with lupus nephritis revealed infiltration of various immune cells and activation of inflammatory signals; however, their correlation with renal damage is not clear, which raises serious concerns about how critical the role of IFN-I is among the potential contributors to the pathogenesis of lupus nephritis. This review addresses several issues related to the roles of IFN-I in SLE, especially in lupus nephritis, including (1) the contribution of IFN-I to the development and immunopathogenesis of SLE; (2) evidence supporting the association of IFN-I with lupus nephritis; (3) therapies targeting IFN-I and IFN-I downstream signaling molecules in SLE and lupus nephritis; (4) findings challenging the therapeutic benefits of anti-IFN-I in lupus nephritis; and (5) a perspective associated with anti-IFN-I biologics for lupus nephritis treatment. In addition to providing clear pictures of the roles of IFN-I in SLE, especially in lupus nephritis, this review addresses the lately published observations and clinical trials on this topic.
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Affiliation(s)
- Benjamin Lai
- Department of Neurology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shue-Fen Luo
- Division of Allergy, Immunology, and Rheumatology, Department of Internal Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan
| | - Jenn-Haung Lai
- Division of Allergy, Immunology, and Rheumatology, Department of Internal Medicine, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan
- Graduate Institute of Medical Science, National Defense Medical Center, Taipei, Taiwan
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9
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Subramanian S, Geng H, Wu L, Du C, Peiper AM, Bu HF, Chou PM, Wang X, Tan SC, Iyer NR, Khan NH, Zechner EL, Fox JG, Breinbauer R, Qi C, Yamini B, Ting JP, De Plaen IG, Karst SM, Tan XD. Microbiota regulates neonatal disease tolerance to virus-evoked necrotizing enterocolitis by shaping the STAT1-NLRC5 axis in the intestinal epithelium. Cell Host Microbe 2024; 32:1805-1821.e10. [PMID: 39293437 PMCID: PMC11956795 DOI: 10.1016/j.chom.2024.08.013] [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: 02/05/2024] [Revised: 05/10/2024] [Accepted: 08/21/2024] [Indexed: 09/20/2024]
Abstract
Microbiota and feeding modes influence the susceptibility of premature newborns to necrotizing enterocolitis (NEC) through mechanisms that remain unknown. Here, we show that microbiota colonization facilitated by breastmilk feeding promotes NOD-like receptor family CARD domain containing 5 (Nlrc5) gene expression in mouse intestinal epithelial cells (IECs). Notably, inducible knockout of the Nlrc5 gene in IECs predisposes neonatal mice to NEC-like injury in the small intestine upon viral inflammation in an NK1.1+ cell-dependent manner. By contrast, formula feeding enhances neonatal gut colonization with environment-derived tilivalline-producing Klebsiella spp. Remarkably, tilivalline disrupts microbiota-activated STAT1 signaling that controls Nlrc5 gene expression in IECs through a PPAR-γ-mediated mechanism. Consequently, this dysregulation hinders the resistance of neonatal intestinal epithelium to self-NK1.1+ cell cytotoxicity upon virus infection/colonization, promoting NEC development. Together, we discover the underappreciated role of intestinal microbiota colonization in shaping a disease tolerance program to viral inflammation and elucidate the mechanisms impacting NEC development in neonates.
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Affiliation(s)
- Saravanan Subramanian
- Pediatric Mucosal Inflammation and Regeneration Research Program, Center for Pediatric Translational Research and Education, Department of Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Hua Geng
- Pediatric Mucosal Inflammation and Regeneration Research Program, Center for Pediatric Translational Research and Education, Department of Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Longtao Wu
- Department of Surgery, Section of Neurosurgery, The University of Chicago, Chicago, IL 60637, USA
| | - Chao Du
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Amy M Peiper
- Department of Molecular Genetics & Microbiology, University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Heng-Fu Bu
- Pediatric Mucosal Inflammation and Regeneration Research Program, Center for Pediatric Translational Research and Education, Department of Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Pauline M Chou
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Xiao Wang
- Pediatric Mucosal Inflammation and Regeneration Research Program, Center for Pediatric Translational Research and Education, Department of Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Stephanie C Tan
- Department of Medical Education, Loyola University Chicago Stritch School of Medicine, Maywood, IL 60153, USA
| | - Neha R Iyer
- Department of Molecular Genetics & Microbiology, University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Nazeer Hussain Khan
- Pediatric Mucosal Inflammation and Regeneration Research Program, Center for Pediatric Translational Research and Education, Department of Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Ellen L Zechner
- Institute of Molecular Biosciences, University of Graz, 8010 Graz, Austria; BioTechMed-Graz, 8010 Graz, Austria
| | - James G Fox
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Rolf Breinbauer
- Institute of Organic Chemistry, Graz University of Technology, 8010 Graz, Austria
| | - Chao Qi
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Bakhtiar Yamini
- Department of Surgery, Section of Neurosurgery, The University of Chicago, Chicago, IL 60637, USA
| | - Jenny P Ting
- Department of Genetics, Department of Microbiology-Immunology and the Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Isabelle G De Plaen
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Stephanie M Karst
- Department of Molecular Genetics & Microbiology, University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Xiao-Di Tan
- Pediatric Mucosal Inflammation and Regeneration Research Program, Center for Pediatric Translational Research and Education, Department of Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA; Department of Research & Development, Jesse Brown Veterans Affairs Medical Center, Chicago, IL 60612, USA.
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10
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Guryanova SV. Bacteria and Allergic Diseases. Int J Mol Sci 2024; 25:10298. [PMID: 39408628 PMCID: PMC11477026 DOI: 10.3390/ijms251910298] [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: 08/26/2024] [Revised: 09/20/2024] [Accepted: 09/23/2024] [Indexed: 10/20/2024] Open
Abstract
Microorganisms colonize all barrier tissues and are present on the skin and all mucous membranes from birth. Bacteria have many ways of influencing the host organism, including activation of innate immunity receptors by pathogen-associated molecular patterns and synthesis of various chemical compounds, such as vitamins, short-chain fatty acids, bacteriocins, toxins. Bacteria, using extracellular vesicles, can also introduce high-molecular compounds, such as proteins and nucleic acids, into the cell, regulating the metabolic pathways of the host cells. Epithelial cells and immune cells recognize bacterial bioregulators and, depending on the microenvironment and context, determine the direction and intensity of the immune response. A large number of factors influence the maintenance of symbiotic microflora, the diversity of which protects hosts against pathogen colonization. Reduced bacterial diversity is associated with pathogen dominance and allergic diseases of the skin, gastrointestinal tract, and upper and lower respiratory tract, as seen in atopic dermatitis, allergic rhinitis, chronic rhinosinusitis, food allergies, and asthma. Understanding the multifactorial influence of microflora on maintaining health and disease determines the effectiveness of therapy and disease prevention and changes our food preferences and lifestyle to maintain health and active longevity.
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Affiliation(s)
- Svetlana V. Guryanova
- M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry RAS, 117997 Moscow, Russia; ; Tel.: +7-(915)3150073
- Medical Institute, Peoples’ Friendship University of Russia, 117198 Moscow, Russia
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11
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Vozza EG, Kelly AM, Daly CM, O'Rourke SA, Carlile SR, Morris B, Dunne A, McLoughlin RM. Type 1 interferons promote Staphylococcus aureus nasal colonization by inducing phagocyte apoptosis. Cell Death Discov 2024; 10:403. [PMID: 39271670 PMCID: PMC11399434 DOI: 10.1038/s41420-024-02173-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 08/23/2024] [Accepted: 09/02/2024] [Indexed: 09/15/2024] Open
Abstract
Staphylococcus aureus is an important human commensal which persistently colonizes up to 30% of the human population, predominantly within the nasal cavity. The commensal lifestyle of S. aureus is complex, and the mechanisms underpinning colonization are not fully understood. S. aureus can induce an immunosuppressive environment in the nasal tissue (NT) by driving IL-10 and IL-27 to facilitate nasal colonization, indicating that S. aureus has the capacity to modulate the local immune environment for its commensal habitation. Mounting evidence suggests commensal bacteria drive type 1 interferons (IFN-I) to establish an immunosuppressive environment and whilst S. aureus can induce IFN-I during infection, its role in colonization has not yet been examined. Here, we show that S. aureus preferentially induces IFN signaling in macrophages. This IFN-I in turn upregulates expression of proapoptotic genes within macrophages culminating in caspase-3 cleavage. Importantly, S. aureus was found to drive phagocytic cell apoptosis in the nasal tissue during nasal colonization in an IFN-I dependent manner with colonization significantly reduced under caspase-3 inhibition. Overall, loss of IFN-I signaling significantly diminished S. aureus nasal colonization implicating a pivotal role for IFN-I in controlling S. aureus persistence during colonization through its ability to induce phagocyte apoptosis. Together, this study reveals a novel strategy utilized by S. aureus to circumvent host immunity in the nasal mucosa to facilitate nasal colonization.
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Affiliation(s)
- Emilio G Vozza
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Alanna M Kelly
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Clíodhna M Daly
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Sinead A O'Rourke
- Molecular Immunology Group, School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - Simon R Carlile
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Brenda Morris
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Aisling Dunne
- Molecular Immunology Group, School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - Rachel M McLoughlin
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.
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12
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Han L, Sun X, Kong J, Li J, Feng K, Bai Y, Wang X, Zhu Z, Yang F, Chen Q, Zhang M, Yue B, Wang X, Fu L, Chen Y, Yang Q, Wang S, Xin Q, Sun N, Zhang D, Zhou Y, Gao Y, Zhao J, Jiang Y, Guo R. Multi-omics analysis reveals a feedback loop amplifying immune responses in acute graft-versus-host disease due to imbalanced gut microbiota and bile acid metabolism. J Transl Med 2024; 22:746. [PMID: 39113144 PMCID: PMC11308528 DOI: 10.1186/s12967-024-05577-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 08/04/2024] [Indexed: 08/10/2024] Open
Abstract
Acute graft-versus-host disease (aGVHD) is primarily driven by allogeneic donor T cells associated with an altered composition of the host gut microbiome and its metabolites. The severity of aGVHD after allogeneic hematopoietic stem cell transplantation (allo-HSCT) is not solely determined by the host and donor characteristics; however, the underlying mechanisms remain unclear. Using single-cell RNA sequencing, we decoded the immune cell atlas of 12 patients who underwent allo-HSCT: six with aGVHD and six with non-aGVHD. We performed a fecal microbiota (16SrRNA sequencing) analysis to investigate the fecal bacterial composition of 82 patients: 30 with aGVHD and 52 with non-aGVHD. Fecal samples from these patients were analyzed for bile acid metabolism. Through multi-omic analysis, we identified a feedback loop involving "immune cell-gut microbes-bile acid metabolites" contributing to heightened immune responses in patients with aGVHD. The dysbiosis of the gut microbiota and disruption of bile acid metabolism contributed to an exaggerated interleukin-1 mediated immune response. Our findings suggest that resistin and defensins are crucial in mitigating against aGVHD. Therefore, a comprehensive multi-omic atlas incorporating immune cells, gut microbes, and bile acid metabolites was developed in this study and used to propose novel, non-immunosuppressive approaches to prevent aGVHD.
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Affiliation(s)
- Lijie Han
- Translational Medical Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xianlei Sun
- Basic Medical Research Center, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China
| | - Jingjing Kong
- Translational Medical Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Jin Li
- Translational Medical Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Kai Feng
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yanliang Bai
- Department of Hematology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Zhengzhou, Henan, China
| | - Xianjing Wang
- Department of Hematology, The Third People's Hospital of Zhengzhou, Zhengzhou, 450000, Henan, China
| | - Zhenhua Zhu
- Department of Laboratory Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Fengyuan Yang
- Basic Medical Research Center, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China
| | - Qingzhou Chen
- Department of Laboratory Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Mengmeng Zhang
- Translational Medical Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Baohong Yue
- Department of Laboratory Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xiaoqian Wang
- Department of Laboratory Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Liyan Fu
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Yaoyao Chen
- Department of Laboratory Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Qiankun Yang
- Department of Blood Transfusion, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Shuya Wang
- Department of Blood Transfusion, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Qingxuan Xin
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Nannan Sun
- Translational Medical Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Danfeng Zhang
- Translational Medical Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yiwei Zhou
- Translational Medical Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yanxia Gao
- Department of Emergency Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Junwei Zhao
- Department of Laboratory Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
| | - Yong Jiang
- Henan Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine and Department of Emergency Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
| | - Rongqun Guo
- Translational Medical Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
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13
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Petrova L, Bunz F. Interferons in Colorectal Cancer Pathogenesis and Therapy. DISEASES & RESEARCH 2024; 4:31-39. [PMID: 38962090 PMCID: PMC11220628 DOI: 10.54457/dr.202401005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
As key modulators of the immune response, interferons play critical roles following infection and during the pathogenesis of cancer. The idea that these cytokines might be developed as new therapies emerged soon after their discovery. While enthusiasm for this approach to cancer therapy has waxed and waned over the ensuing decades, recent advances in cancer immunotherapy and our improved understanding of the tumor immune environment have led to a resurgence of interest in this unique class of biologic drug. Here, we review how interferons influence the growth of colorectal cancers (CRCs) and highlight new insights into how interferons and drugs that modulate interferon expression might be most effectively deployed in the clinic.
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Affiliation(s)
- Lucy Petrova
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore Maryland 21287, USA
| | - Fred Bunz
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore Maryland 21287, USA
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14
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Xu WD, Wang DC, Zhao M, Huang AF. An updated advancement of bifunctional IL-27 in inflammatory autoimmune diseases. Front Immunol 2024; 15:1366377. [PMID: 38566992 PMCID: PMC10985211 DOI: 10.3389/fimmu.2024.1366377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 03/04/2024] [Indexed: 04/04/2024] Open
Abstract
Interleukin-27 (IL-27) is a member of the IL-12 family. The gene encoding IL-27 is located at chromosome 16p11. IL-27 is considered as a heterodimeric cytokine, which consists of Epstein-Barr virus (EBV)-induced gene 3 (Ebi3) and IL-27p28. Based on the function of IL-27, it binds to receptor IL-27rα or gp130 and then regulates downstream cascade. To date, findings show that the expression of IL-27 is abnormal in different inflammatory autoimmune diseases (including systemic lupus erythematosus, rheumatoid arthritis, Sjogren syndrome, Behcet's disease, inflammatory bowel disease, multiple sclerosis, systemic sclerosis, type 1 diabetes, Vogt-Koyanagi-Harada, and ankylosing spondylitis). Moreover, in vivo and in vitro studies demonstrated that IL-27 is significantly in3volved in the development of these diseases by regulating innate and adaptive immune responses, playing either an anti-inflammatory or a pro-inflammatory role. In this review, we comprehensively summarized information about IL-27 and autoimmunity based on available evidence. It is hoped that targeting IL-27 will hold great promise in the treatment of inflammatory autoimmune disorders in the future.
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Affiliation(s)
- Wang-Dong Xu
- Department of Evidence-Based Medicine, School of Public Health, Southwest Medical University, Luzhou, Sichuan, China
| | - Da-Cheng Wang
- Department of Evidence-Based Medicine, School of Public Health, Southwest Medical University, Luzhou, Sichuan, China
| | - Ming Zhao
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
- Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, Second Xiangya Hospital, Central South University, Changsha, China
| | - An-Fang Huang
- Department of Rheumatology and Immunology, Affiliated Hospital, Southwest Medical University, Luzhou, Sichuan, China
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15
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Yang Y, Cadwell K. Beyond antiviral: Interferon induced by bacteria maintains tolerance in the gut. J Exp Med 2024; 221:e20232011. [PMID: 38091026 PMCID: PMC10720530 DOI: 10.1084/jem.20232011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023] Open
Abstract
Type I interferons are best known for their antiviral role. Here, Ayala et al. (https://doi.org/10.1084/jem.20230063) reveal that commensal bacteria elicit tonic type I interferons to prime dendritic cells and induce regulatory T cells that maintain a tolerogenic intestinal milieu.
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Affiliation(s)
- Yi Yang
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Ken Cadwell
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
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