1
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Huret C, Ferrayé L, David A, Mohamed M, Valentin N, Charlotte F, Savignac M, Goodhardt M, Guéry JC, Rougeulle C, Morey C. Altered X-chromosome inactivation predisposes to autoimmunity. SCIENCE ADVANCES 2024; 10:eadn6537. [PMID: 38701219 PMCID: PMC11068014 DOI: 10.1126/sciadv.adn6537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 04/03/2024] [Indexed: 05/05/2024]
Abstract
In mammals, males and females show marked differences in immune responses. Males are globally more sensitive to infectious diseases, while females are more susceptible to systemic autoimmunity. X-chromosome inactivation (XCI), the epigenetic mechanism ensuring the silencing of one X in females, may participate in these sex biases. We perturbed the expression of the trigger of XCI, the noncoding RNA Xist, in female mice. This resulted in reactivation of genes on the inactive X, including members of the Toll-like receptor 7 (TLR7) signaling pathway, in monocyte/macrophages and dendritic and B cells. Consequently, female mice spontaneously developed inflammatory signs typical of lupus, including anti-nucleic acid autoantibodies, increased frequencies of age-associated and germinal center B cells, and expansion of monocyte/macrophages and dendritic cells. Mechanistically, TLR7 signaling is dysregulated in macrophages, leading to sustained expression of target genes upon stimulation. These findings provide a direct link between maintenance of XCI and female-biased autoimmune manifestations and highlight altered XCI as a cause of autoimmunity.
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Affiliation(s)
- Christophe Huret
- Université Paris Cité, CNRS, Epigenetics and Cell Fate, F-75013 Paris, France
| | - Léa Ferrayé
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), INSERM UMR1291, CNRS UMR5051, University Paul Sabatier, Toulouse, France
| | - Antoine David
- Université Paris Cité, INSERM UMRS 976, Institut de Recherche Saint Louis, F-75010, Paris, France
| | - Myriame Mohamed
- Université Paris Cité, CNRS, Epigenetics and Cell Fate, F-75013 Paris, France
| | - Nicolas Valentin
- Université Paris Cité, CNRS, Institut Jacques Monod, F-75013, Paris, France
| | - Frédéric Charlotte
- Sorbonne University, Department of Pathological Anatomy and Cytology, Hôpital Pitié-Salpêtrière Charles Foix, F-75013, Paris, France
| | - Magali Savignac
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), INSERM UMR1291, CNRS UMR5051, University Paul Sabatier, Toulouse, France
| | - Michele Goodhardt
- Université Paris Cité, INSERM UMRS 976, Institut de Recherche Saint Louis, F-75010, Paris, France
| | - Jean-Charles Guéry
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), INSERM UMR1291, CNRS UMR5051, University Paul Sabatier, Toulouse, France
| | - Claire Rougeulle
- Université Paris Cité, CNRS, Epigenetics and Cell Fate, F-75013 Paris, France
| | - Céline Morey
- Université Paris Cité, CNRS, Epigenetics and Cell Fate, F-75013 Paris, France
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2
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Morel L, Scindia Y. Functional consequence of Iron dyshomeostasis and ferroptosis in systemic lupus erythematosus and lupus nephritis. Clin Immunol 2024; 262:110181. [PMID: 38458303 DOI: 10.1016/j.clim.2024.110181] [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: 01/06/2024] [Accepted: 03/04/2024] [Indexed: 03/10/2024]
Abstract
Systemic lupus erythematosus (SLE) and its renal manifestation Lupus nephritis (LN) are characterized by a dysregulated immune system, autoantibodies, and injury to the renal parenchyma. Iron accumulation and ferroptosis in the immune effectors and renal tubules are recently identified pathological features in SLE and LN. Ferroptosis is an iron dependent non-apoptotic form of regulated cell death and ferroptosis inhibitors have improved disease outcomes in murine models of SLE, identifying it as a novel druggable target. In this review, we discuss novel mechanisms by which iron accumulation and ferroptosis perpetuate immune cell mediated pathology in SLE/LN. We highlight intra-renal dysregulation of iron metabolism and ferroptosis as an underlying pathogenic mechanism of renal tubular injury. The basic concepts of iron biology and ferroptosis are also discussed to expose the links between iron, cell metabolism and ferroptosis, that identify intracellular pro-ferroptotic enzymes and their protein conjugates as potential targets to improve SLE/LN outcomes.
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Affiliation(s)
- Laurence Morel
- Department of Microbiology, Immunology, and Molecular Genetics, UT Health San Antonio, San Antonio, TX, USA
| | - Yogesh Scindia
- Department of Medicine, University of Florida, Gainesville, FL, USA.
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3
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Wang T, Song D, Li X, Luo Y, Yang D, Liu X, Kong X, Xing Y, Bi S, Zhang Y, Hu T, Zhang Y, Dai S, Shao Z, Chen D, Hou J, Ballestar E, Cai J, Zheng F, Yang JY. MiR-574-5p activates human TLR8 to promote autoimmune signaling and lupus. Cell Commun Signal 2024; 22:220. [PMID: 38589923 PMCID: PMC11000404 DOI: 10.1186/s12964-024-01601-1] [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: 12/26/2023] [Accepted: 03/28/2024] [Indexed: 04/10/2024] Open
Abstract
Endosomal single-stranded RNA-sensing Toll-like receptor-7/8 (TLR7/8) plays a pivotal role in inflammation and immune responses and autoimmune diseases. However, the mechanisms underlying the initiation of the TLR7/8-mediated autoimmune signaling remain to be fully elucidated. Here, we demonstrate that miR-574-5p is aberrantly upregulated in tissues of lupus prone mice and in the plasma of lupus patients, with its expression levels correlating with the disease activity. miR-574-5p binds to and activates human hTLR8 or its murine ortholog mTlr7 to elicit a series of MyD88-dependent immune and inflammatory responses. These responses include the overproduction of cytokines and interferons, the activation of STAT1 signaling and B lymphocytes, and the production of autoantigens. In a transgenic mouse model, the induction of miR-574-5p overexpression is associated with increased secretion of antinuclear and anti-dsDNA antibodies, increased IgG and C3 deposit in the kidney, elevated expression of inflammatory genes in the spleen. In lupus-prone mice, lentivirus-mediated silencing of miR-574-5p significantly ameliorates major symptoms associated with lupus and lupus nephritis. Collectively, these results suggest that the miR-574-5p-hTLR8/mTlr7 signaling is an important axis of immune and inflammatory responses, contributing significantly to the development of lupus and lupus nephritis.
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Affiliation(s)
- Tao Wang
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
- The Key Laboratory of Urinary Tract Tumors and Calculi, Department of Urology, School of Medicine, The First Affiliated Hospital of Xiamen University, Xiamen University, Xiamen, 361003, China
| | - Dan Song
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Xuejuan Li
- Wuhu Hospital of East China Normal University, Wuhu, Anhui, 241000, China
- Kidney Health Institute, Health Science Center, East China Normal University, Minhang, Shanghai, 200241, China
- Department of Nephrology, The Second Hospital, Dalian Medical University, Dalian, 116144, China
| | - Yu Luo
- School of Nursing, The Third Military Medical University, Chongqing, 400038, China
| | - Dianqiang Yang
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Xiaoyan Liu
- Department of Nephrology, The Second Hospital, Dalian Medical University, Dalian, 116144, China
| | - Xiaodan Kong
- Department of Rheumatology, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Yida Xing
- Department of Rheumatology, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Shulin Bi
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Yan Zhang
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Tao Hu
- College of Medicine, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Yunyun Zhang
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Shuang Dai
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Zhiqiang Shao
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Dahan Chen
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Jinpao Hou
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China
| | - Esteban Ballestar
- Wuhu Hospital of East China Normal University, Wuhu, Anhui, 241000, China
- Kidney Health Institute, Health Science Center, East China Normal University, Minhang, Shanghai, 200241, China
- Epigenetics and Immune Disease Group, Josep Carreras Leukaemia Research Institute (IJC), Badalona, Barcelona, 08916, Spain
| | - Jianchun Cai
- Department of Gastrointestinal Surgery, Institute of Gastrointestinal Oncology, Zhongshan Hospital of Xiamen University, Medical College of Xiamen University, Xiamen, Fujian, 361005, China.
| | - Feng Zheng
- Wuhu Hospital of East China Normal University, Wuhu, Anhui, 241000, China.
- Kidney Health Institute, Health Science Center, East China Normal University, Minhang, Shanghai, 200241, China.
- Department of Nephrology, The Second Hospital, Dalian Medical University, Dalian, 116144, China.
- The Advanced Institute for Molecular Medicine, Dalian Medical University, Dalian, 116144, China.
| | - James Y Yang
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiang'an, Xiamen, 361102, China.
- Wuhu Hospital of East China Normal University, Wuhu, Anhui, 241000, China.
- Kidney Health Institute, Health Science Center, East China Normal University, Minhang, Shanghai, 200241, China.
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Lin Y, Wan Z, Liu B, Yao J, Li T, Yang F, Sui J, Zhao Y, Liu W, Zhou X, Wang J, Qi H. B cell-reactive triad of B cells, follicular helper and regulatory T cells at homeostasis. Cell Res 2024; 34:295-308. [PMID: 38326478 PMCID: PMC10978943 DOI: 10.1038/s41422-024-00929-0] [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: 09/08/2023] [Accepted: 01/08/2024] [Indexed: 02/09/2024] Open
Abstract
Autoreactive B cells are silenced through receptor editing, clonal deletion and anergy induction. Additional autoreactive B cells are ignorant because of physical segregation from their cognate autoantigen. Unexpectedly, we find that follicular B cell-derived autoantigen, including cell surface molecules such as FcγRIIB, is a class of homeostatic autoantigen that can induce spontaneous germinal centers (GCs) and B cell-reactive autoantibodies in non-autoimmune animals with intact T and B cell repertoires. These B cell-reactive B cells form GCs in a manner dependent on spontaneous follicular helper T (TFH) cells, which preferentially recognize B cell-derived autoantigen, and in a manner constrained by spontaneous follicular regulatory T (TFR) cells, which also carry specificities for B cell-derived autoantigen. B cell-reactive GC cells are continuously generated and, following immunization or infection, become intermixed with foreign antigen-induced GCs. Production of plasma cells and antibodies derived from B cell-reactive GC cells are markedly enhanced by viral infection, potentially increasing the chance for autoimmunity. Consequently, immune homeostasis in healthy animals not only involves classical tolerance of silencing and ignoring autoreactive B cells but also entails a reactive equilibrium attained by a spontaneous B cell-reactive triad of B cells, TFH cells and TFR cells.
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Affiliation(s)
- Yihan Lin
- Tsinghua-Peking Center for Life Sciences, Beijing, China
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Tsinghua University, Beijing, China
- Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Zurong Wan
- Tsinghua-Peking Center for Life Sciences, Beijing, China
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Tsinghua University, Beijing, China
- Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
- Weill Cornell Medical College, Cornell University, Ithaca, NY, USA
| | - Bo Liu
- Tsinghua-Peking Center for Life Sciences, Beijing, China
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Tsinghua University, Beijing, China
- Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
- Changping Laboratory, Beijing, China
| | - Jiacheng Yao
- Changping Laboratory, Beijing, China
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Tianqi Li
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Fang Yang
- National Institute of Biological Sciences, Beijing, China
| | - Jianhua Sui
- National Institute of Biological Sciences, Beijing, China
| | - Yongshan Zhao
- Tsinghua-Peking Center for Life Sciences, Beijing, China
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Tsinghua University, Beijing, China
- Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Wanli Liu
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Xuyu Zhou
- Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Jianbin Wang
- Changping Laboratory, Beijing, China.
- School of Life Sciences, Tsinghua University, Beijing, China.
| | - Hai Qi
- Tsinghua-Peking Center for Life Sciences, Beijing, China.
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Tsinghua University, Beijing, China.
- Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China.
- Changping Laboratory, Beijing, China.
- New Cornerstone Science Laboratory, School of Medicine, Tsinghua University, Beijing, China.
- Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, China.
- Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing, China.
- SXMU-Tsinghua Collaborative Innovation Center for Frontier Medicine, Shanxi Medical University, Taiyuan, Shanxi, China.
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5
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Kellermann G, Leulliot N, Cherfils-Vicini J, Blaud M, Brest P. Activated B-Cells enhance epitope spreading to support successful cancer immunotherapy. Front Immunol 2024; 15:1382236. [PMID: 38571942 PMCID: PMC10989059 DOI: 10.3389/fimmu.2024.1382236] [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: 02/05/2024] [Accepted: 02/26/2024] [Indexed: 04/05/2024] Open
Abstract
Immune checkpoint therapies (ICT) have transformed the treatment of cancer over the past decade. However, many patients do not respond or suffer relapses. Successful immunotherapy requires epitope spreading, but the slow or inefficient induction of functional antitumoral immunity delays the benefit to patients or causes resistances. Therefore, understanding the key mechanisms that support epitope spreading is essential to improve immunotherapy. In this review, we highlight the major role played by B-cells in breaking immune tolerance by epitope spreading. Activated B-cells are key Antigen-Presenting Cells (APC) that diversify the T-cell response against self-antigens, such as ribonucleoproteins, in autoimmunity but also during successful cancer immunotherapy. This has important implications for the design of future cancer vaccines.
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Affiliation(s)
| | - Nicolas Leulliot
- Université Paris Cité, Centre national de la recherche scientifique (CNRS), Cibles Thérapeutiques et Conception de Médicaments (CiTCoM), Paris, France
| | - Julien Cherfils-Vicini
- Université Côte d’Azur, Institute for Research on Cancer and Aging, Nice (IRCAN), Centre national de la recherche scientifique (CNRS), Institut national de la santé et de la recherche médicale (INSERM), Centre Antoine Lacassagne, Institut Hospitalo-Universitaire (IHU), RESPIRera, Fédérations Hospitalo-Universitaires (FHU)OncoAge, Nice, France
| | - Magali Blaud
- Université Paris Cité, Centre national de la recherche scientifique (CNRS), Cibles Thérapeutiques et Conception de Médicaments (CiTCoM), Paris, France
| | - Patrick Brest
- Université Côte d’Azur, Institute for Research on Cancer and Aging, Nice (IRCAN), Centre national de la recherche scientifique (CNRS), Institut national de la santé et de la recherche médicale (INSERM), Centre Antoine Lacassagne, Institut Hospitalo-Universitaire (IHU), RESPIRera, Fédérations Hospitalo-Universitaires (FHU)OncoAge, Nice, France
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6
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He Y, Vinuesa CG. Germinal center versus extrafollicular responses in systemic autoimmunity: Who turns the blade on self? Adv Immunol 2024; 162:109-133. [PMID: 38866437 PMCID: PMC7616122 DOI: 10.1016/bs.ai.2024.02.002] [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] [Indexed: 06/14/2024]
Abstract
Spontaneously formed germinal centers (GCs) have been reported in most mouse models of human autoimmune disease and autoimmune patients, and have long been considered a source of somatically-mutated and thus high affinity autoantibodies, but their role in autoimmunity is becoming increasingly controversial, particularly in the context of systemic autoimmune diseases like lupus. On the one hand, there is good evidence that some pathogenic lupus antibodies have acquired somatic mutations that increase affinity for self-antigens. On the other hand, recent studies that have genetically prevented GC formation, suggest that GCs are dispensable for systemic autoimmunity, pointing instead to pathogenic extrafollicular (EF) B-cell responses. Furthermore, several lines of evidence suggest germinal centers may in fact be somewhat protective in the context of autoimmunity. Here we review how some of the conflicting evidence arose, and current views on the role of GCs in autoimmunity, outlining mechanisms by which GC may eliminate self-reactivity. We also discuss recent advances in understanding extrafollicular B cell subsets that participate in autoimmunity.
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Affiliation(s)
- Yuke He
- China-Australia Centre for Personalised Immunology, Department of Rheumatology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Carola G Vinuesa
- China-Australia Centre for Personalised Immunology, Department of Rheumatology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China; Francis Crick Institute, London, United Kingdom.
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7
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Punnanitinont A, Kasperek EM, Zhu C, Yu G, Miecznikowski JC, Kramer JM. TLR7 activation of age-associated B cells mediates disease in a mouse model of primary Sjögren's disease. J Leukoc Biol 2024; 115:497-510. [PMID: 37930711 PMCID: PMC10990110 DOI: 10.1093/jleuko/qiad135] [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: 07/25/2023] [Revised: 10/16/2023] [Accepted: 10/23/2023] [Indexed: 11/07/2023] Open
Abstract
Primary Sjögren's disease (pSD) (also referred to as Sjögren's syndrome) is an autoimmune disease that primarily occurs in women. In addition to exocrine gland dysfunction, pSD patients exhibit B cell hyperactivity. B cell-intrinsic TLR7 activation is integral to the pathogenesis of systemic lupus erythematosus, a disease that shares similarities with pSD. The role of TLR7-mediated B cell activation in pSD, however, remains poorly understood. We hypothesized that age-associated B cells (ABCs) were expanded in pSD and that TLR7-stimulated ABCs exhibited pathogenic features characteristic of disease. Our data revealed that ABC expansion and TLR7 expression were enhanced in a pSD mouse model in a Myd88-dependent manner. Splenocytes from pSD mice showed enhanced sensitivity to TLR7 agonism as compared with those derived from control animals. Sort-purified marginal zone B cells and ABCs from pSD mice showed enhanced inflammatory cytokine secretion and were enriched for antinuclear autoantibodies following TLR7 agonism. Finally, IgG from pSD patient sera showed elevated antinuclear autoantibodies, many of which were secreted preferentially by TLR7-stimulated murine marginal zone B cells and ABCs. These data indicate that pSD B cells are hyperresponsive to TLR7 agonism and that TLR7-activated B cells contribute to pSD through cytokine and autoantibody production. Thus, therapeutics that target TLR7 signaling cascades in B cells may have utility in pSD patients.
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Affiliation(s)
- Achamaporn Punnanitinont
- Department of Oral Biology, School of Dental Medicine, The University at Buffalo, State University of New York, Buffalo, NY USA
| | - Eileen M. Kasperek
- Department of Oral Biology, School of Dental Medicine, The University at Buffalo, State University of New York, Buffalo, NY USA
| | - Chengsong Zhu
- Department of Immunology, Microarray & Immune Phenotyping Core Facility, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Guan Yu
- Department of Biostatistics, School of Public Health and Health Professions, The University at Buffalo, State University of New York, Buffalo, NY USA
| | - Jeffrey C. Miecznikowski
- Department of Biostatistics, School of Public Health and Health Professions, The University at Buffalo, State University of New York, Buffalo, NY USA
| | - Jill M. Kramer
- Department of Oral Biology, School of Dental Medicine, The University at Buffalo, State University of New York, Buffalo, NY USA
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8
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Rauch E, Amendt T, Lopez Krol A, Lang FB, Linse V, Hohmann M, Keim AC, Kreutzer S, Kawengian K, Buchholz M, Duschner P, Grauer S, Schnierle B, Ruhl A, Burtscher I, Dehnert S, Kuria C, Kupke A, Paul S, Liehr T, Lechner M, Schnare M, Kaufmann A, Huber M, Winkler TH, Bauer S, Yu P. T-bet + B cells are activated by and control endogenous retroviruses through TLR-dependent mechanisms. Nat Commun 2024; 15:1229. [PMID: 38336876 PMCID: PMC10858178 DOI: 10.1038/s41467-024-45201-6] [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: 03/07/2023] [Accepted: 01/17/2024] [Indexed: 02/12/2024] Open
Abstract
Endogenous retroviruses (ERVs) are an integral part of the mammalian genome. The role of immune control of ERVs in general is poorly defined as is their function as anti-cancer immune targets or drivers of autoimmune disease. Here, we generate mouse-strains where Moloney-Murine Leukemia Virus tagged with GFP (ERV-GFP) infected the mouse germline. This enables us to analyze the role of genetic, epigenetic and cell intrinsic restriction factors in ERV activation and control. We identify an autoreactive B cell response against the neo-self/ERV antigen GFP as a key mechanism of ERV control. Hallmarks of this response are spontaneous ERV-GFP+ germinal center formation, elevated serum IFN-γ levels and a dependency on Age-associated B cells (ABCs) a subclass of T-bet+ memory B cells. Impairment of IgM B cell receptor-signal in nucleic-acid sensing TLR-deficient mice contributes to defective ERV control. Although ERVs are a part of the genome they break immune tolerance, induce immune surveillance against ERV-derived self-antigens and shape the host immune response.
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Affiliation(s)
- Eileen Rauch
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
- CSL Behring Innovation GmbH, Emil-von-Behring-Str. 76, 35041, Marburg, Germany
| | - Timm Amendt
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
- The Francis Crick Institute, NW1 1AT, London, UK
| | | | - Fabian B Lang
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Vincent Linse
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Michelle Hohmann
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
- Apollo Ventures Holding GmbH, 20457, Hamburg, Germany
| | - Ann-Christin Keim
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Susanne Kreutzer
- Max-Planck-Institute for Heart and Lung Research, 61231, Bad Nauheim, Germany
| | - Kevin Kawengian
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Malte Buchholz
- Department of Gastroenterology, Endocrinology and Metabolism, and Core Facility Small Animal Multispectral and Ultrasound Imaging, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Philipp Duschner
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Saskia Grauer
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Barbara Schnierle
- Department of Virology, Paul-Ehrlich-Institut, 63225, Langen, Germany
| | - Andreas Ruhl
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
- Department of Infection Biology, University Hospital Erlangen, 91054, Erlangen, Germany
| | - Ingo Burtscher
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, 85764, Neuherberg, Germany
| | - Sonja Dehnert
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Chege Kuria
- Nikolaus-Fiebiger Center for Molecular Medicine, Friedrich-Alexander Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Alexandra Kupke
- Institute of Virology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Stephanie Paul
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Thomas Liehr
- Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, 07747, Jena, Germany
| | - Marcus Lechner
- Center for Synthetic Microbiology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Markus Schnare
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Andreas Kaufmann
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Magdalena Huber
- Institute of Sytems Immunology, Center for Tumor and Immunobiology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Thomas H Winkler
- Nikolaus-Fiebiger Center for Molecular Medicine, Friedrich-Alexander Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Stefan Bauer
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany
| | - Philipp Yu
- Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany.
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9
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Pandey SP, Bhaskar R, Han SS, Narayanan KB. Autoimmune Responses and Therapeutic Interventions for Systemic Lupus Erythematosus: A Comprehensive Review. Endocr Metab Immune Disord Drug Targets 2024; 24:499-518. [PMID: 37718519 DOI: 10.2174/1871530323666230915112642] [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: 12/09/2022] [Revised: 06/05/2023] [Accepted: 07/22/2023] [Indexed: 09/19/2023]
Abstract
Systemic Lupus Erythematosus (SLE) or Lupus is a multifactorial autoimmune disease of multiorgan malfunctioning of extremely heterogeneous and unclear etiology that affects multiple organs and physiological systems. Some racial groups and women of childbearing age are more susceptible to SLE pathogenesis. Impressive progress has been made towards a better understanding of different immune components contributing to SLE pathogenesis. Recent investigations have uncovered the detailed mechanisms of inflammatory responses and organ damage. Various environmental factors, pathogens, and toxicants, including ultraviolet light, drugs, viral pathogens, gut microbiome metabolites, and sex hormones trigger the onset of SLE pathogenesis in genetically susceptible individuals and result in the disruption of immune homeostasis of cytokines, macrophages, T cells, and B cells. Diagnosis and clinical investigations of SLE remain challenging due to its clinical heterogeneity and hitherto only a few approved antimalarials, glucocorticoids, immunosuppressants, and some nonsteroidal anti-inflammatory drugs (NSAIDs) are available for treatment. However, the adverse effects of renal and neuropsychiatric lupus and late diagnosis make therapy challenging. Additionally, SLE is also linked to an increased risk of cardiovascular diseases due to inflammatory responses and the risk of infection from immunosuppressive treatment. Due to the diversity of symptoms and treatment-resistant diseases, SLE management remains a challenging issue. Nevertheless, the use of next-generation therapeutics with stem cell and gene therapy may bring better outcomes to SLE treatment in the future. This review highlights the autoimmune responses as well as potential therapeutic interventions for SLE particularly focusing on the recent therapeutic advancements and challenges.
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Affiliation(s)
- Surya Prakash Pandey
- Aarogya Institute of Healthcare and Research, Jaipur, Rajasthan, 302033, India
- Department of Zoology, School of Science, IFTM University, Moradabad, Uttar Pradesh, 244102, India
| | - Rakesh Bhaskar
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea
- Research Institute of Cell Culture, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, South Korea
| | - Sung Soo Han
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea
- Research Institute of Cell Culture, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, South Korea
| | - Kannan Badri Narayanan
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea
- Research Institute of Cell Culture, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, South Korea
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Ranjan S, Panda AK. Association of Toll-Like Receptor 7 (TLR7) Polymorphisms with Predisposition to Systemic Lupus Erythematosus (SLE): A Meta and Trial Sequential Analysis. Biochem Genet 2023:10.1007/s10528-023-10600-9. [PMID: 38103124 DOI: 10.1007/s10528-023-10600-9] [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: 06/25/2023] [Accepted: 11/13/2023] [Indexed: 12/17/2023]
Abstract
Systemic Lupus Erythematosus (SLE) is an autoimmune disorder characterized by autoantibody production and organ involvement. The role of toll-like receptor-7 in SLE is well established. Although genetic variations in the TLR-7 gene have been associated with an increased risk of developing SLE, the findings are not consistent. We performed a meta-analysis of previously published articles on four important single nucleotide polymorphisms in the TLR-7 gene (rs3853839, rs179008, rs179019, and rs179010) to reach a valid conclusion. Various literature databases, including PubMed, Science Direct, and Scopus, were scoured for eligible reports until May 10, 2023. GPower software v.3 was used to assess the power of individual reports included in the meta-analysis. Comprehensive Meta-analysis v3 software was used to perform all statistics. The publication biases in each genetic comparison model were investigated using funnel plots and Egger's regression test. To test heterogeneity, Cochrane Q statistics, probability value and I2 were used. Considering the predefined inclusion and exclusion criteria, the current study included a total of 10 eligible studies that included 15,472 SLE cases and 16,721 healthy controls. The meta-analysis revealed a significant association between TLR7 polymorphisms (rs179019 and rs179010) and susceptibility to SLE development. Other TLR7 polymorphisms (rs3853839 and rs179008), on the other hand, showed no significant association. Furthermore, the trial sequential analysis identified the need for additional case control studies for TLR-7 polymorphisms (rs3853839, rs179008, and rs179019) other than the rs179010 polymorphism. TLR7 variants for rs179010 and rs179019 are risk factor for the development of SLE. Further investigations are required to reach a valid conclusion.
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Affiliation(s)
- Shovit Ranjan
- University Department of Zoology, Kolhan University, Chaibasa, Jharkhand, 833202, India
| | - Aditya K Panda
- ImmGen EvSys Laboratory, Department of Biotechnology, Berhampur University, Bhanja Bihar, Berhampur, Odisha, 760007, India.
- Centre of Excellence on Bioprospecting of Ethnopharmaceuticals of Southern Odisha (CoE-BESO), Berhampur University, Bhanja Bihar, Berhampur, Odisha, India.
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Echavarria R, Cardona-Muñoz EG, Ortiz-Lazareno P, Andrade-Sierra J, Gómez-Hermosillo LF, Casillas-Moreno J, Campos-Bayardo TI, Román-Rojas D, García-Sánchez A, Miranda-Díaz AG. The Role of the Oxidative State and Innate Immunity Mediated by TLR7 and TLR9 in Lupus Nephritis. Int J Mol Sci 2023; 24:15234. [PMID: 37894915 PMCID: PMC10607473 DOI: 10.3390/ijms242015234] [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: 08/22/2023] [Revised: 09/25/2023] [Accepted: 09/29/2023] [Indexed: 10/29/2023] Open
Abstract
Lupus nephritis (LN) is a severe complication of systemic lupus erythematosus (SLE) and is considered one of the leading causes of mortality. Multiple immunological pathways are involved in the pathogenesis of SLE, which makes it imperative to deepen our knowledge about this disease's immune-pathological complexity and explore new therapeutic targets. Since an altered redox state contributes to immune system dysregulation, this document briefly addresses the roles of oxidative stress (OS), oxidative DNA damage, antioxidant enzymes, mitochondrial function, and mitophagy in SLE and LN. Although adaptive immunity's participation in the development of autoimmunity is undeniable, increasing data emphasize the importance of innate immunity elements, particularly the Toll-like receptors (TLRs) that recognize nucleic acid ligands, in inflammatory and autoimmune diseases. Here, we discuss the intriguing roles of TLR7 and TLR9 in developing SLE and LN. Also included are the essential characteristics of conventional treatments and some other novel and little-explored alternatives that offer options to improve renal function in LN.
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Affiliation(s)
- Raquel Echavarria
- Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara 44340, Mexico; (R.E.); (P.O.-L.)
- Investigadores por México, Consejo Nacional de Ciencia y Tecnología (CONACYT), Ciudad de México 03940, Mexico
| | - Ernesto Germán Cardona-Muñoz
- Department of Physiology, University Center of Health Sciences, University of Guadalajara, Guadalajara 44360, Mexico; (E.G.C.-M.); (J.A.-S.); (L.F.G.-H.); (J.C.-M.); (T.I.C.-B.); (D.R.-R.); (A.G.-S.)
| | - Pablo Ortiz-Lazareno
- Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara 44340, Mexico; (R.E.); (P.O.-L.)
| | - Jorge Andrade-Sierra
- Department of Physiology, University Center of Health Sciences, University of Guadalajara, Guadalajara 44360, Mexico; (E.G.C.-M.); (J.A.-S.); (L.F.G.-H.); (J.C.-M.); (T.I.C.-B.); (D.R.-R.); (A.G.-S.)
| | - Luis Francisco Gómez-Hermosillo
- Department of Physiology, University Center of Health Sciences, University of Guadalajara, Guadalajara 44360, Mexico; (E.G.C.-M.); (J.A.-S.); (L.F.G.-H.); (J.C.-M.); (T.I.C.-B.); (D.R.-R.); (A.G.-S.)
| | - Jorge Casillas-Moreno
- Department of Physiology, University Center of Health Sciences, University of Guadalajara, Guadalajara 44360, Mexico; (E.G.C.-M.); (J.A.-S.); (L.F.G.-H.); (J.C.-M.); (T.I.C.-B.); (D.R.-R.); (A.G.-S.)
| | - Tannia Isabel Campos-Bayardo
- Department of Physiology, University Center of Health Sciences, University of Guadalajara, Guadalajara 44360, Mexico; (E.G.C.-M.); (J.A.-S.); (L.F.G.-H.); (J.C.-M.); (T.I.C.-B.); (D.R.-R.); (A.G.-S.)
| | - Daniel Román-Rojas
- Department of Physiology, University Center of Health Sciences, University of Guadalajara, Guadalajara 44360, Mexico; (E.G.C.-M.); (J.A.-S.); (L.F.G.-H.); (J.C.-M.); (T.I.C.-B.); (D.R.-R.); (A.G.-S.)
| | - Andrés García-Sánchez
- Department of Physiology, University Center of Health Sciences, University of Guadalajara, Guadalajara 44360, Mexico; (E.G.C.-M.); (J.A.-S.); (L.F.G.-H.); (J.C.-M.); (T.I.C.-B.); (D.R.-R.); (A.G.-S.)
| | - Alejandra Guillermina Miranda-Díaz
- Department of Physiology, University Center of Health Sciences, University of Guadalajara, Guadalajara 44360, Mexico; (E.G.C.-M.); (J.A.-S.); (L.F.G.-H.); (J.C.-M.); (T.I.C.-B.); (D.R.-R.); (A.G.-S.)
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12
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Miquel CH, Abbas F, Cenac C, Foret-Lucas C, Guo C, Ducatez M, Joly E, Hou B, Guéry JC. B cell-intrinsic TLR7 signaling is required for neutralizing antibody responses to SARS-CoV-2 and pathogen-like COVID-19 vaccines. Eur J Immunol 2023; 53:e2350437. [PMID: 37438976 DOI: 10.1002/eji.202350437] [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: 02/15/2023] [Revised: 05/16/2023] [Accepted: 06/13/2023] [Indexed: 07/14/2023]
Abstract
Toll-like receptor 7 (TLR7) triggers antiviral immune responses through its capacity to recognize single-stranded RNA. TLR7 loss-of-function mutants are associated with life-threatening pneumonia in severe COVID-19 patients. Whereas TLR7-driven innate induction of type I IFN appears central to control SARS-CoV2 virus spreading during the first days of infection, the impact of TLR7-deficiency on adaptive B-cell immunity is less clear. In the present study, we examined the role of TLR7 in the adaptive B cells response to various pathogen-like antigens (PLAs). We used inactivated SARS-CoV2 and a PLA-based COVID-19 vaccine candidate designed to mimic SARS-CoV2 with encapsulated bacterial ssRNA as TLR7 ligands and conjugated with the RBD of the SARS-CoV2 Spike protein. Upon repeated immunization with inactivated SARS-CoV2 or PLA COVID-19 vaccine, we show that Tlr7-deficiency abolished the germinal center (GC)-dependent production of RBD-specific class-switched IgG2b and IgG2c, and neutralizing antibodies to SARS-CoV2. We also provide evidence for a non-redundant role for B-cell-intrinsic TLR7 in the promotion of RBD-specific IgG2b/IgG2c and memory B cells. Together, these data demonstrate that the GC reaction and class-switch recombination to the Myd88-dependent IgG2b/IgG2c in response to SARS-CoV2 or PLAs is strictly dependent on cell-intrinsic activation of TLR7 in B cells.
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Affiliation(s)
- Charles-Henry Miquel
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITY), Université de Toulouse, INSERM, CNRS, UPS, Toulouse, France
- Arthritis R&D, Neuilly-Sur-Seine, France
| | - Flora Abbas
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITY), Université de Toulouse, INSERM, CNRS, UPS, Toulouse, France
| | - Claire Cenac
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITY), Université de Toulouse, INSERM, CNRS, UPS, Toulouse, France
| | - Charlotte Foret-Lucas
- Interactions Hôtes Agents Pathogènes (IHAP), UMR1225, Université de Toulouse, INRAe, ENVT, Toulouse, France
| | - Chang Guo
- CAS Key Laboratory of Infection and Immunity, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
- College of life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Mariette Ducatez
- Interactions Hôtes Agents Pathogènes (IHAP), UMR1225, Université de Toulouse, INRAe, ENVT, Toulouse, France
| | - Etienne Joly
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | - Baidong Hou
- CAS Key Laboratory of Infection and Immunity, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
- College of life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Jean-Charles Guéry
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITY), Université de Toulouse, INSERM, CNRS, UPS, Toulouse, France
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13
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Maria NI, Papoin J, Raparia C, Sun Z, Josselsohn R, Lu A, Katerji H, Syeda MM, Polsky D, Paulson R, Kalfa T, Barnes BJ, Zhang W, Blanc L, Davidson A. Human TLR8 induces inflammatory bone marrow erythromyeloblastic islands and anemia in SLE-prone mice. Life Sci Alliance 2023; 6:e202302241. [PMID: 37495396 PMCID: PMC10372407 DOI: 10.26508/lsa.202302241] [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: 06/27/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/28/2023] Open
Abstract
Anemia commonly occurs in systemic lupus erythematosus, a disease characterized by innate immune activation by nucleic acids. Overactivation of cytoplasmic sensors by self-DNA or RNA can cause erythroid cell death, while sparing other hematopoietic cell lineages. Whereas chronic inflammation is involved in this mechanism, less is known about the impact of systemic lupus erythematosus on the BM erythropoietic niche. We discovered that expression of the endosomal ssRNA sensor human TLR8 induces fatal anemia in Sle1.Yaa lupus mice. We observed that anemia was associated with a decrease in erythromyeloblastic islands and a block in differentiation at the CFU-E to proerythroblast transition in the BM. Single-cell RNAseq analyses of isolated BM erythromyeloblastic islands from human TLR8-expressing mice revealed that genes associated with essential central macrophage functions including adhesion and provision of nutrients were down-regulated. Although compensatory stress erythropoiesis occurred in the spleen, red blood cell half-life decreased because of hemophagocytosis. These data implicate the endosomal RNA sensor TLR8 as an additional innate receptor whose overactivation causes acquired failure of erythropoiesis via myeloid cell dysregulation.
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Affiliation(s)
- Naomi I Maria
- Institute of Molecular Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA
- Donald and Barbara Zucker School of Medicine at Northwell Health, Hempstead, NY, USA
| | - Julien Papoin
- Institute of Molecular Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA
- Donald and Barbara Zucker School of Medicine at Northwell Health, Hempstead, NY, USA
| | - Chirag Raparia
- Institute of Molecular Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA
- Donald and Barbara Zucker School of Medicine at Northwell Health, Hempstead, NY, USA
| | - Zeguo Sun
- Department of Medicine, Mount Sinai Medical Center, New York, NY, USA
| | - Rachel Josselsohn
- Institute of Molecular Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA
| | - Ailing Lu
- Institute of Molecular Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA
| | - Hani Katerji
- Department of Pathology, University of Rochester, Rochester, NY, USA
| | - Mahrukh M Syeda
- The Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, NY, USA
| | - David Polsky
- The Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, NY, USA
| | - Robert Paulson
- Department of Veterinary and Biomedical Sciences, Penn State College of Agricultural Sciences, University Park, PA, USA
| | - Theodosia Kalfa
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Betsy J Barnes
- Institute of Molecular Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA
- Donald and Barbara Zucker School of Medicine at Northwell Health, Hempstead, NY, USA
| | - Weijia Zhang
- Department of Medicine, Mount Sinai Medical Center, New York, NY, USA
| | - Lionel Blanc
- Institute of Molecular Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA
- Donald and Barbara Zucker School of Medicine at Northwell Health, Hempstead, NY, USA
| | - Anne Davidson
- Institute of Molecular Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA
- Donald and Barbara Zucker School of Medicine at Northwell Health, Hempstead, NY, USA
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14
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Smith M, Meliopoulos V, Tan S, Bub T, Brigleb PH, Sharp B, Crawford JC, Prater MS, Pruett-Miller SM, Schultz-Cherry S. The β6 Integrin Negatively Regulates TLR7-Mediated Epithelial Immunity via Autophagy During Influenza A Virus Infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.28.555098. [PMID: 37693589 PMCID: PMC10491108 DOI: 10.1101/2023.08.28.555098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Integrins are essential surface receptors that sense extracellular changes to initiate various intracellular signaling cascades. The rapid activation of the epithelial-intrinsic β6 integrin during influenza A virus (IAV) infection has been linked to innate immune impairments. Yet, how β6 regulates epithelial immunity remains undefined. Here, we identify the role of β6 in mediating the Toll-like receptor 7 (TLR7) through the regulation of intracellular trafficking. We demonstrate that deletion of the β6 integrin in lung epithelial cells significantly enhances the TLR7-mediated activation of the type I interferon (IFN) response during homeostasis and respiratory infection. IAV-induced β6 facilitates TLR7 trafficking to lysosome-associated membrane protein (LAMP2a) components, leading to a reduction in endosomal compartments and associated TLR7 signaling. Our findings reveal an unappreciated role of β6-induced autophagy in influencing epithelial immune responses during influenza virus infection.
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15
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Chen HH, Yu YR, Hsiao YL, Chen SH, Lee CK. Plasmacytoid Dendritic Cells Enhance T-Independent B Cell Response through a p38 MAPK-STAT1 Axis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2023; 211:576-590. [PMID: 37427982 DOI: 10.4049/jimmunol.2200210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 06/12/2023] [Indexed: 07/11/2023]
Abstract
TLR signaling in B cells triggers their activation and differentiation independent of help from T cells. Plasmacytoid dendritic cells (pDCs) cooperate with B cells to boost TLR-stimulated T-independent humoral immunity; however, the molecular mechanisms remain elusive. In this study, we demonstrate that in the mouse system, the adjuvant effects of pDCs also occurred following challenge with pathogens and that follicular (FO) B cells were more sensitive to pDC-induced enhancement than were marginal zone (MZ) B cells. Moreover, pDCs migrated to the FO zones and interacted with FO B cells upon stimulation in vivo. CXCL10, a ligand for CXCR3 expressed on pDCs, was superinduced in the coculture system and facilitated the cooperative activation of B cells. Moreover, pDCs also promoted TLR-stimulated autoantibody production in FO B and MZ B cells. Ingenuity Pathway Analysis and gene set enrichment analysis revealed that type I IFN (IFN-I)-mediated JAK-STAT and Ras-MAPK pathways were highly enriched in R848-stimulated B cells cocultured with pDCs compared with B cells alone. Whereas IFN-I receptor 1 deficiency reduced pDC-enhanced B cell responses, STAT1 deficiency displayed a more pronounced defect. One of the STAT1-dependent but IFN-I-independent mechanisms was TLR-induced STAT1-S727 phosphorylation by p38 MAPK. Serine 727 to alanine mutation attenuated the synergism between pDCs and B cells. In conclusion, we uncover a molecular mechanism for pDC-enhanced B cell response and define a crucial role of the IFN-I/TLR-mediated signaling pathway through a p38 MAPK-STAT1 axis in controlling T-independent humoral immunity and providing a novel therapeutic target for treating autoimmune diseases.
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Affiliation(s)
- Hsin-Hsiang Chen
- Graduate Institute of Immunology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ya-Ru Yu
- Graduate Institute of Immunology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yu-Ling Hsiao
- Graduate Institute of Immunology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shun-Hua Chen
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chien-Kuo Lee
- Graduate Institute of Immunology, College of Medicine, National Taiwan University, Taipei, Taiwan
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16
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Vinuesa CG, Grenov A, Kassiotis G. Innate virus-sensing pathways in B cell systemic autoimmunity. Science 2023; 380:478-484. [PMID: 37141353 DOI: 10.1126/science.adg6427] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Although all multicellular organisms have germ line-encoded innate receptors to sense pathogen-associated molecular patterns, vertebrates also evolved adaptive immunity based on somatically generated antigen receptors on B and T cells. Because randomly generated antigen receptors may also react with self-antigens, tolerance checkpoints operate to limit but not completely prevent autoimmunity. These two systems are intricately linked, with innate immunity playing an instrumental role in the induction of adaptive antiviral immunity. In this work, we review how inborn errors of innate immunity can instigate B cell autoimmunity. Increased nucleic acid sensing, often resulting from defects in metabolizing pathways or retroelement control, can break B cell tolerance and converge into TLR7-, cGAS-STING-, or MAVS-dominant signaling pathways. The resulting syndromes span a spectrum that ranges from chilblain and systemic lupus to severe interferonopathies.
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Affiliation(s)
- Carola G Vinuesa
- The Francis Crick Institute, London, UK
- China Centre for Personalised Immunology, Renji Hospital, Shanghai, China
| | | | - George Kassiotis
- The Francis Crick Institute, London, UK
- Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, UK
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17
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Miquel CH, Faz-Lopez B, Guéry JC. Influence of X chromosome in sex-biased autoimmune diseases. J Autoimmun 2023; 137:102992. [PMID: 36641351 DOI: 10.1016/j.jaut.2023.102992] [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: 01/03/2023] [Accepted: 01/03/2023] [Indexed: 01/13/2023]
Abstract
Females have better ability to resolve infections, compared to males, but also, a greater susceptibility to develop autoimmunity. Besides the initial interest on the contribution of sex-steroid hormone signaling, the role of genetic factors linked to X chromosome has recently focused much attention. In human and mouse, the number of X chromosomes, rather than sex-steroid hormones, have been found associated with higher risk or susceptibility to develop autoimmunity, particularly rheumatic diseases, such as SLE, Sjögren's syndrome or Scleroderma. For all of these diseases, the Toll-like receptor TLR7 and TLR8, encoded on the same locus in the human Xp, have been demonstrated to be causal in disease development through gene dosage effect or gain of function mutations. During embryonic development in female mammals, one X chromosome is stochastically inactivated to balance X-linked gene expression between males and females, a process known as X chromosome inactivation (XCI). Nevertheless, some genes including immune related genes can escape XCI to variable degree and penetrance, resulting in a bi-allelic expression in some immune cells, such as TLR7. Because tight regulation of TLR expression is necessary for a healthy, self-tolerant immune environment, XCI escape has been proposed as a mechanism contributing to this sexual dimorphism. In this review, we will summarize general mechanisms of XCI, and describe the known escapee's genes in immune cells, the cellular diversity created by such mechanisms and its potential implication in autoimmune diseases, with a particular focus on the X-linked genes and immune cell populations involved in SLE. Whether dysregulated expression of X-linked genes could contribute to the enhanced susceptibility of females to develop such diseases remains to be proven. Shedding lights onto the X-linked genetic mechanisms contributing to modulation of immune cell functions will undoubtedly provide new insights into the intricate mechanisms underlying sex differences in immunity and autoimmunity.
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Affiliation(s)
- Charles-Henry Miquel
- Toulouse Institute for Infectious and Inflammatory Diseases (INFINITY), Université de Toulouse, INSERM, CNRS, UPS, 31300, France; Arthritis R&D, Neuilly-Sur-Seine, France
| | - Berenice Faz-Lopez
- Toulouse Institute for Infectious and Inflammatory Diseases (INFINITY), Université de Toulouse, INSERM, CNRS, UPS, 31300, France
| | - Jean-Charles Guéry
- Toulouse Institute for Infectious and Inflammatory Diseases (INFINITY), Université de Toulouse, INSERM, CNRS, UPS, 31300, France.
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18
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Shao X, Liu X, Qi H. A role for Hes1 in constraining germinal center B cell formation. CELL INSIGHT 2023; 2:100078. [PMID: 37193067 PMCID: PMC10134198 DOI: 10.1016/j.cellin.2023.100078] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/17/2023] [Accepted: 01/17/2023] [Indexed: 05/18/2023]
Abstract
Germinal center is a transient lymphoid tissue structure in which B cells undergo affinity maturation and differentiate into memory B cells and plasma cells. GC formation depends on B cell expression of BCL6, a master transcription regulator of the GC state. Bcl6 expression is under elaborate control by external signals. HES1 plays important roles in T-cell lineage commitment, although little is known about its potential roles in GC formation. Here we report that B-cell-specific HES1 deletion causes a significant increase in GC formation, leading to increased production of plasma cells. We further provide evidence that HES1 inhibits BCL6 expression in a bHLH domain-dependent manner. Our study suggests a new layer of regulation of GC initiation mediated by HES1 and, by inference, Notch signals in vivo.
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Affiliation(s)
- Xingxing Shao
- Tsinghua-Peking Center for Life Sciences, Beijing, China
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Tsinghua University, Beijing, China
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Xin Liu
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Tsinghua University, Beijing, China
- Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Hai Qi
- Tsinghua-Peking Center for Life Sciences, Beijing, China
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Tsinghua University, Beijing, China
- School of Life Sciences, Tsinghua University, Beijing, China
- Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
- Frontiers Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing, China
- Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, China
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19
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Venturutti L, Rivas MA, Pelzer BW, Flümann R, Hansen J, Karagiannidis I, Xia M, McNally DR, Isshiki Y, Lytle A, Teater M, Chin CR, Meydan C, Knittel G, Ricker E, Mason CE, Ye X, Pan-Hammarström Q, Steidl C, Scott DW, Reinhardt HC, Pernis AB, Béguelin W, Melnick AM. An Aged/Autoimmune B-cell Program Defines the Early Transformation of Extranodal Lymphomas. Cancer Discov 2023; 13:216-243. [PMID: 36264161 PMCID: PMC9839622 DOI: 10.1158/2159-8290.cd-22-0561] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 09/26/2022] [Accepted: 10/17/2022] [Indexed: 01/17/2023]
Abstract
A third of patients with diffuse large B-cell lymphoma (DLBCL) present with extranodal dissemination, which is associated with inferior clinical outcomes. MYD88L265P is a hallmark extranodal DLBCL mutation that supports lymphoma proliferation. Yet extranodal lymphomagenesis and the role of MYD88L265P in transformation remain mostly unknown. Here, we show that B cells expressing Myd88L252P (MYD88L265P murine equivalent) activate, proliferate, and differentiate with minimal T-cell costimulation. Additionally, Myd88L252P skewed B cells toward memory fate. Unexpectedly, the transcriptional and phenotypic profiles of B cells expressing Myd88L252P, or other extranodal lymphoma founder mutations, resembled those of CD11c+T-BET+ aged/autoimmune memory B cells (AiBC). AiBC-like cells progressively accumulated in animals prone to develop lymphomas, and ablation of T-BET, the AiBC master regulator, stripped mouse and human mutant B cells of their competitive fitness. By identifying a phenotypically defined prospective lymphoma precursor population and its dependencies, our findings pave the way for the early detection of premalignant states and targeted prophylactic interventions in high-risk patients. SIGNIFICANCE Extranodal lymphomas feature a very poor prognosis. The identification of phenotypically distinguishable prospective precursor cells represents a milestone in the pursuit of earlier diagnosis, patient stratification, and prophylactic interventions. Conceptually, we found that extranodal lymphomas and autoimmune disorders harness overlapping pathogenic trajectories, suggesting these B-cell disorders develop and evolve within a spectrum. See related commentary by Leveille et al. (Blood Cancer Discov 2023;4:8-11). This article is highlighted in the In This Issue feature, p. 1.
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Affiliation(s)
- Leandro Venturutti
- Centre for Lymphoid Cancer, BC Cancer, Vancouver, BC V5Z1L3, Canada., Terry Fox Laboratory, BC Cancer, Vancouver, BC V5Z1L3, Canada., Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC V6T1Z7, Canada.,Corresponding authors: Leandro Venturutti, PhD. Centre for Lymphoid Cancer and Terry Fox Laboratory, BC Cancer Research Institute, 675 W 10th Ave, Vancouver, BC, V5Z 1L3, Canada. Phone: 604-675-8000; Fax: 604-877-0712; , Ari M. Melnick, MD. Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, 413 E 69th St, New York, NY, 10021, USA. Phone: 646-962-6725; Fax: 646-962-0576;
| | - Martin A. Rivas
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA
| | - Benedikt W. Pelzer
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA., Mildred Scheel School of Oncology Aachen Bonn Cologne Düsseldorf (MSSO ABCD), Faculty of Medicine and University Hospital of Cologne, Cologne D-50937, Germany
| | - Ruth Flümann
- Department I of Internal Medicine, University Hospital Cologne, Cologne 50931, Germany., Max-Planck-Institute for Biology of Aging, Cologne 50931, Germany
| | - Julia Hansen
- Department I of Internal Medicine, University Hospital Cologne, Cologne 50931, Germany., Max-Planck-Institute for Biology of Aging, Cologne 50931, Germany
| | - Ioannis Karagiannidis
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA
| | - Min Xia
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA
| | - Dylan R. McNally
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA
| | - Yusuke Isshiki
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA
| | - Andrew Lytle
- Centre for Lymphoid Cancer, BC Cancer, Vancouver, BC V5Z1L3, Canada
| | - Matt Teater
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA
| | - Christopher R. Chin
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA., Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY 10021, USA., The HRH Prince Alwaleed Bin Talal Bin Abdulaziz Alsaud Institute for Computational Biomedicine and the WorldQuant Initiative for Quantitative Prediction, Weill Cornell Medicine, New York, NY 10021, USA
| | - Cem Meydan
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY 10021, USA., The HRH Prince Alwaleed Bin Talal Bin Abdulaziz Alsaud Institute for Computational Biomedicine and the WorldQuant Initiative for Quantitative Prediction, Weill Cornell Medicine, New York, NY 10021, USA
| | - Gero Knittel
- Department of Hematology and Stem Cell Transplantation, West German Cancer Center, University Hospital of Essen, University of Duisburg-Essen, Essen 45147, Germany
| | - Edd Ricker
- Autoimmunity and Inflammation Program, Hospital for Special Surgery, New York, NY 10021, USA
| | - Christopher E. Mason
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY 10021, USA., The HRH Prince Alwaleed Bin Talal Bin Abdulaziz Alsaud Institute for Computational Biomedicine and the WorldQuant Initiative for Quantitative Prediction, Weill Cornell Medicine, New York, NY 10021, USA
| | - Xiaofei Ye
- Department of Biosciences and Nutrition, Karolinska Institutet, 14183 Huddinge, Stockholm, Sweden
| | - Qiang Pan-Hammarström
- Department of Biosciences and Nutrition, Karolinska Institutet, 14183 Huddinge, Stockholm, Sweden
| | - Christian Steidl
- Centre for Lymphoid Cancer, BC Cancer, Vancouver, BC V5Z1L3, Canada., Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC V6T1Z7, Canada
| | - David W. Scott
- Centre for Lymphoid Cancer, BC Cancer, Vancouver, BC V5Z1L3, Canada., Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC V6T1Z7, Canada., Department of Medicine, University of British Columbia, Vancouver, BC V6T1Z7, Canada
| | - Hans Christian Reinhardt
- Department of Hematology and Stem Cell Transplantation, West German Cancer Center, University Hospital of Essen, University of Duisburg-Essen, Essen 45147, Germany
| | - Alessandra B. Pernis
- Autoimmunity and Inflammation Program, Hospital for Special Surgery, New York, NY 10021, USA
| | - Wendy Béguelin
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA
| | - Ari M. Melnick
- Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA.,Corresponding authors: Leandro Venturutti, PhD. Centre for Lymphoid Cancer and Terry Fox Laboratory, BC Cancer Research Institute, 675 W 10th Ave, Vancouver, BC, V5Z 1L3, Canada. Phone: 604-675-8000; Fax: 604-877-0712; , Ari M. Melnick, MD. Division of Hematology/Oncology, Department of Medicine, Weill Cornell Medicine, 413 E 69th St, New York, NY, 10021, USA. Phone: 646-962-6725; Fax: 646-962-0576;
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20
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TLR7 and IgM: Dangerous Partners in Autoimmunity. Antibodies (Basel) 2023; 12:antib12010004. [PMID: 36648888 PMCID: PMC9844493 DOI: 10.3390/antib12010004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 10/27/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023] Open
Abstract
The B cell antigen receptor (BCR)-repertoire is capable of recognizing a nearly unlimited number of antigens. Inevitably, the random nature of antibody gene segment rearrangement, needed in order to provide mature B cells, will generate autoreactive specificities. Once tolerance mechanisms fail to block the activation and differentiation of autoreactive B cells, harmful autoantibodies may get secreted establishing autoimmune diseases. Besides the hallmark of autoimmunity, namely IgG autoantibodies, IgM autoantibodies are also found in many autoimmune diseases. In addition to pathogenic functions of secreted IgM the IgM-BCR expressing B cell might be the initial check-point where, in conjunction with innate receptor signals, B cell mediated autoimmunity starts it fateful course. Recently, pentameric IgM autoantibodies have been shown to contribute significantly to the pathogenesis of various autoimmune diseases, such as rheumatoid arthritis (RA), autoimmune hemolytic anemia (AIHA), pemphigus or autoimmune neuropathy. Further, recent studies suggest differences in the recognition of autoantigen by IgG and IgM autoantibodies, or propose a central role of anti-ACE2-IgM autoantibodies in severe COVID-19. However, exact mechanisms still remain to be uncovered in detail. This article focuses on summarizing recent findings regarding the importance of autoreactive IgM in establishing autoimmune diseases.
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21
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Wen L, Zhang B, Wu X, Liu R, Fan H, Han L, Zhang Z, Ma X, Chu CQ, Shi X. Toll-like receptors 7 and 9 regulate the proliferation and differentiation of B cells in systemic lupus erythematosus. Front Immunol 2023; 14:1093208. [PMID: 36875095 PMCID: PMC9975558 DOI: 10.3389/fimmu.2023.1093208] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 02/02/2023] [Indexed: 02/17/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune illness marked by the loss of immune tolerance and the production of autoantibodies against nucleic acids and other nuclear antigens (Ags). B lymphocytes are important in the immunopathogenesis of SLE. Multiple receptors control abnormal B-cell activation in SLE patients, including intrinsic Toll-like receptors (TLRs), B-cell receptors (BCRs), and cytokine receptors. The role of TLRs, notably TLR7 and TLR9, in the pathophysiology of SLE has been extensively explored in recent years. When endogenous or exogenous nucleic acid ligands are recognized by BCRs and internalized into B cells, they bind TLR7 or TLR9 to activate related signalling pathways and thus govern the proliferation and differentiation of B cells. Surprisingly, TLR7 and TLR9 appear to play opposing roles in SLE B cells, and the interaction between them is still poorly understood. In addition, other cells can enhance TLR signalling in B cells of SLE patients by releasing cytokines that accelerate the differentiation of B cells into plasma cells. Therefore, the delineation of how TLR7 and TLR9 regulate the abnormal activation of B cells in SLE may aid the understanding of the mechanisms of SLE and provide directions for TLR-targeted therapies for SLE.
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Affiliation(s)
- Luyao Wen
- Department of Rheumatology and Immunology, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Bei Zhang
- Department of Rheumatology and Immunology, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Xinfeng Wu
- Department of Rheumatology and Immunology, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Rongzeng Liu
- Department of Immunology, School of Basic Medical Sciences, Henan University of Science and Technology, Luoyang, China
| | - Hua Fan
- Office of Research & Innovation, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Lei Han
- Department of Rheumatology and Immunology, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Zhibo Zhang
- Department of Rheumatology and Immunology, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Xin Ma
- Department of Rheumatology and Immunology, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Cong-Qiu Chu
- Division of Arthritis and Rheumatic Diseases, Oregon Health & Science University and VA Portland Health Care System, Portland, OR, United States
| | - Xiaofei Shi
- Department of Rheumatology and Immunology, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
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22
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Punnanitinont A, Kasperek EM, Kiripolsky J, Zhu C, Miecznikowski JC, Kramer JM. TLR7 agonism accelerates disease in a mouse model of primary Sjögren's syndrome and drives expansion of T-bet + B cells. Front Immunol 2022; 13:1034336. [PMID: 36591307 PMCID: PMC9799719 DOI: 10.3389/fimmu.2022.1034336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 11/30/2022] [Indexed: 12/23/2022] Open
Abstract
Primary Sjögren's syndrome (pSS) is a systemic autoimmune disease characterized by chronic inflammation of exocrine tissue, resulting in loss of tears and saliva. Patients also experience many extra-glandular disease manifestations. Treatment for pSS is palliative, and there are currently no treatments available that target disease etiology. Previous studies in our lab demonstrated that MyD88 is crucial for pSS pathogenesis in the NOD.B10Sn-H2b (NOD.B10) pSS mouse model, although the way in which MyD88-dependent pathways become activated in disease remains unknown. Based on its importance in other autoimmune diseases, we hypothesized that TLR7 activation accelerates pSS pathogenesis. We administered the TLR7 agonist Imiquimod (Imq) or sham treatment to pre-disease NOD.B10 females for 6 weeks. Parallel experiments were performed in age and sex-matched C57BL/10 controls. Imq-treated pSS animals exhibited cervical lymphadenopathy, splenomegaly, and expansion of TLR7-expressing B cells. Robust lymphocytic infiltration of exocrine tissues, kidney and lung was observed in pSS mice following treatment with Imq. TLR7 agonism also induced salivary hypofunction in pSS mice, which is a hallmark of disease. Anti-nuclear autoantibodies, including Ro (SSA) and La (SSB) were increased in pSS mice following Imq administration. Cervical lymph nodes from Imq-treated NOD.B10 animals demonstrated an increase in the percentage of activated/memory CD4+ T cells. Finally, T-bet+ B cells were expanded in the spleens of Imq-treated pSS mice. Thus, activation of TLR7 accelerates local and systemic disease and promotes expansion of T-bet-expressing B cells in pSS.
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Affiliation(s)
- Achamaporn Punnanitinont
- Department of Oral Biology, School of Dental Medicine, The University at Buffalo, State University of New York, Buffalo, NY, United States
| | - Eileen M. Kasperek
- Department of Oral Biology, School of Dental Medicine, The University at Buffalo, State University of New York, Buffalo, NY, United States
| | - Jeremy Kiripolsky
- Department of Oral Biology, School of Dental Medicine, The University at Buffalo, State University of New York, Buffalo, NY, United States
| | - Chengsong Zhu
- Department of Immunology, Microarray & Immune Phenotyping Core Facility, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Jeffrey C. Miecznikowski
- Department of Biostatistics, School of Public Health and Health Professions, The University at Buffalo, State University of New York, Buffalo, NY, United States
| | - Jill M. Kramer
- Department of Oral Biology, School of Dental Medicine, The University at Buffalo, State University of New York, Buffalo, NY, United States,*Correspondence: Jill M. Kramer,
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23
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Corneth OBJ, Neys SFH, Hendriks RW. Aberrant B Cell Signaling in Autoimmune Diseases. Cells 2022; 11:cells11213391. [PMID: 36359789 PMCID: PMC9654300 DOI: 10.3390/cells11213391] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/15/2022] [Accepted: 10/24/2022] [Indexed: 11/30/2022] Open
Abstract
Aberrant B cell signaling plays a critical in role in various systemic and organ-specific autoimmune diseases. This is supported by genetic evidence by many functional studies in B cells from patients or specific animal models and by the observed efficacy of small-molecule inhibitors. In this review, we first discuss key signal transduction pathways downstream of the B cell receptor (BCR) that ensure that autoreactive B cells are removed from the repertoire or functionally silenced. We provide an overview of aberrant BCR signaling that is associated with inappropriate B cell repertoire selection and activation or survival of peripheral B cell populations and plasma cells, finally leading to autoantibody formation. Next to BCR signaling, abnormalities in other signal transduction pathways have been implicated in autoimmune disease. These include reduced activity of several phosphates that are downstream of co-inhibitory receptors on B cells and increased levels of BAFF and APRIL, which support survival of B cells and plasma cells. Importantly, pathogenic synergy of the BCR and Toll-like receptors (TLR), which can be activated by endogenous ligands, such as self-nucleic acids, has been shown to enhance autoimmunity. Finally, we will briefly discuss therapeutic strategies for autoimmune disease based on interfering with signal transduction in B cells.
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24
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cis interaction of CD153 with TCR/CD3 is crucial for the pathogenic activation of senescence-associated T cells. Cell Rep 2022; 40:111373. [PMID: 36130493 DOI: 10.1016/j.celrep.2022.111373] [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: 01/16/2022] [Revised: 07/13/2022] [Accepted: 08/26/2022] [Indexed: 11/22/2022] Open
Abstract
With age, senescence-associated (SA) CD4+ T cells that are refractory to T cell receptor (TCR) stimulation are increased along with spontaneous germinal center (Spt-GC) development prone to autoantibody production. We demonstrate that CD153 and its receptor CD30 are expressed in SA-T and Spt-GC B cells, respectively, and deficiency of either CD153 or CD30 results in the compromised increase of both cell types. CD153 engagement on SA-T cells upon TCR stimulation causes association of CD153 with the TCR/CD3 complex and restores TCR signaling, whereas CD30 engagement on GC B cells induces their expansion. Administration of an anti-CD153 antibody blocking the interaction with CD30 suppresses the increase in both SA-T and Spt-GC B cells with age and ameliorates lupus in lupus-prone mice. These results suggest that the molecular interaction of CD153 and CD30 plays a central role in the reciprocal activation of SA-T and Spt-GC B cells, leading to immunosenescent phenotypes and autoimmunity.
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25
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Pindzola GM, Razzaghi R, Tavory RN, Nguyen HT, Morris VM, Li M, Agarwal S, Huang B, Okada T, Reinhardt HC, Knittel G, Kashkar H, Young RM, Pittaluga S, Muppidi JR. Aberrant expansion of spontaneous splenic germinal centers induced by hallmark genetic lesions of aggressive lymphoma. Blood 2022; 140:1119-1131. [PMID: 35759728 PMCID: PMC9461474 DOI: 10.1182/blood.2022015926] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 06/18/2022] [Indexed: 11/20/2022] Open
Abstract
Unique molecular vulnerabilities have been identified in the aggressive MCD/C5 genetic subclass of diffuse large B-cell lymphoma (DLBCL). However, the premalignant cell-of-origin exhibiting MCD-like dependencies remains elusive. In this study, we examined animals carrying up to 4 hallmark genetic lesions found in MCD consisting of gain-of-function mutations in Myd88 and Cd79b, loss of Prdm1, and overexpression of BCL2. We discovered that expression of combinations of these alleles in vivo promoted a cell-intrinsic accumulation of B cells in spontaneous splenic germinal centers (GCs). As with MCD, these premalignant B cells were enriched for B-cell receptors (BCRs) with evidence of self-reactivity, displayed a de novo dependence on Tlr9, and were more sensitive to inhibition of Bruton's tyrosine kinase. Mutant spontaneous splenic GC B cells (GCB) showed increased proliferation and IRF4 expression. Mice carrying all 4 genetic lesions showed a >50-fold expansion of spontaneous splenic GCs exhibiting aberrant histologic features with a dark zone immunophenotype and went on to develop DLBCL in the spleen with age. Thus, by combining multiple hallmark genetic alterations associated with MCD, our study identifies aberrant spontaneous splenic GCBs as a likely cell-of-origin for this aggressive genetic subtype of lymphoma.
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Affiliation(s)
- Grace M Pindzola
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Raud Razzaghi
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Rachel N Tavory
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Hang T Nguyen
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Vivian M Morris
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
- Department of Biology, Johns Hopkins University, Baltimore, MD
| | - Moyi Li
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Shreya Agarwal
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Bonnie Huang
- Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Takaharu Okada
- Laboratory for Tissue Dynamics, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa, Japan
- Graduate School of Medical Life Science, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Hans C Reinhardt
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, Essen, Germany
| | - Gero Knittel
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, Essen, Germany
| | - Hamid Kashkar
- Institute for Molecular Immunology, Center for Molecular Medicine Cologne (CMMC), CECAD Research Center, Faculty of Medicine University Hospital Cologne, University of Cologne, Cologne, Germany; and
| | - Ryan M Young
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Stefania Pittaluga
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Jagan R Muppidi
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
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26
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Abt ER, Rashid K, Le TM, Li S, Lee HR, Lok V, Li L, Creech AL, Labora AN, Mandl HK, Lam AK, Cho A, Rezek V, Wu N, Abril-Rodriguez G, Rosser EW, Mittelman SD, Hugo W, Mehrling T, Bantia S, Ribas A, Donahue TR, Crooks GM, Wu TT, Radu CG. Purine nucleoside phosphorylase enables dual metabolic checkpoints that prevent T cell immunodeficiency and TLR7-associated autoimmunity. J Clin Invest 2022; 132:e160852. [PMID: 35653193 PMCID: PMC9374381 DOI: 10.1172/jci160852] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 05/31/2022] [Indexed: 01/27/2023] Open
Abstract
Purine nucleoside phosphorylase (PNP) enables the breakdown and recycling of guanine nucleosides. PNP insufficiency in humans is paradoxically associated with both immunodeficiency and autoimmunity, but the mechanistic basis for these outcomes is incompletely understood. Here, we identify two immune lineage-dependent consequences of PNP inactivation dictated by distinct gene interactions. During T cell development, PNP inactivation is synthetically lethal with downregulation of the dNTP triphosphohydrolase SAMHD1. This interaction requires deoxycytidine kinase activity and is antagonized by microenvironmental deoxycytidine. In B lymphocytes and macrophages, PNP regulates Toll-like receptor 7 signaling by controlling the levels of its (deoxy)guanosine nucleoside ligands. Overriding this regulatory mechanism promotes germinal center formation in the absence of exogenous antigen and accelerates disease in a mouse model of autoimmunity. This work reveals that one purine metabolism gene protects against immunodeficiency and autoimmunity via independent mechanisms operating in distinct immune lineages and identifies PNP as a potentially novel metabolic immune checkpoint.
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Affiliation(s)
- Evan R. Abt
- Department of Molecular and Medical Pharmacology and
| | - Khalid Rashid
- Department of Molecular and Medical Pharmacology and
| | - Thuc M. Le
- Department of Molecular and Medical Pharmacology and
| | - Suwen Li
- Department of Molecular and Medical Pharmacology and
| | - Hailey R. Lee
- Department of Molecular and Medical Pharmacology and
| | - Vincent Lok
- Department of Molecular and Medical Pharmacology and
| | - Luyi Li
- Department of Surgery, UCLA, Los Angeles, California, USA
| | | | | | - Hanna K. Mandl
- Department of Surgery, UCLA, Los Angeles, California, USA
| | - Alex K. Lam
- Department of Molecular and Medical Pharmacology and
| | - Arthur Cho
- Department of Nuclear Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | | | - Nanping Wu
- Department of Surgery, UCLA, Los Angeles, California, USA
| | | | | | - Steven D. Mittelman
- Division of Pediatric Endocrinology, UCLA Children’s Discovery and Innovation Institute, and
| | - Willy Hugo
- Division of Dermatology, Department of Medicine, UCLA, Los Angeles, California, USA
| | | | | | - Antoni Ribas
- Department of Molecular and Medical Pharmacology and
- Parker Institute for Cancer Immunotherapy, San Francisco, California, USA
- Division of Hematology/Oncology, Department of Medicine
- Division of Surgical Oncology, Department of Surgery
- Jonsson Comprehensive Cancer Center
| | - Timothy R. Donahue
- Department of Molecular and Medical Pharmacology and
- Department of Surgery, UCLA, Los Angeles, California, USA
- Jonsson Comprehensive Cancer Center
| | - Gay M. Crooks
- Division of Pediatric Hematology-Oncology, Department of Pediatrics
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, and
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, California, USA
| | - Ting-Ting Wu
- Department of Molecular and Medical Pharmacology and
| | - Caius G. Radu
- Department of Molecular and Medical Pharmacology and
- Jonsson Comprehensive Cancer Center
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27
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Acharya M, Jackson SW. Regulatory strategies limiting endosomal Toll-like receptor activation in B cells. Immunol Rev 2022; 307:66-78. [PMID: 35040152 PMCID: PMC8986562 DOI: 10.1111/imr.13065] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 01/07/2022] [Indexed: 12/26/2022]
Abstract
The recognition of pathogen-associated nucleic acid (NA) promotes effective immunity against invading pathogens. However, endosomal Toll-like receptor (TLR) activation by self-NA also underlies the pathogenesis of systemic autoimmune diseases, such as systemic lupus erythematosus (SLE). For this reason, the activation thresholds of NA-sensing TLRs must be tightly regulated to balance protective and pathogenic immune responses. In this study, we will provide an overview of the evolutionary mechanisms designed to limit the aberrant activation of endosomal TLRs by self-ligands, focusing on four broad strategies. These include the following: 1) the production of nucleases able to degrade self-DNA and RNA; 2) the cell-specific regulation of endosomal TLR expression; 3) the spatial and temporal control of TLR positioning at a sub-cellular level; and 4) the modulation of downstream TLR signaling cascades. Given the critical role of B cells in lupus pathogenesis, where possible, we will describe evidence for B cell-specific induction of these regulatory mechanisms. We will also highlight our own work showing how modulation of B cell endolysosomal flux tunes NA-sensing TLR activation signals. In the face of inevitable generation of self-NA during normal cellular turnover, these parallel mechanisms are vital to protect against pathogenic inflammation.
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Affiliation(s)
- Mridu Acharya
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington, USA.,Seattle Children's Research Institute, Seattle, Washington, USA
| | - Shaun W Jackson
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington, USA.,Seattle Children's Research Institute, Seattle, Washington, USA
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28
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Tsubata T. Role of inhibitory B cell co-receptors in B cell self-tolerance to non-protein antigens. Immunol Rev 2022; 307:53-65. [PMID: 34989000 DOI: 10.1111/imr.13059] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 12/14/2022]
Abstract
Antibodies to non-protein antigens such as nucleic acids, polysaccharides, and glycolipids play important roles in both host defense against microbes and development of autoimmune diseases. Although non-protein antigens are not recognized by T cells, antibody production to non-protein antigens involve T cell-independent mechanisms such as signaling through TLR7 and TLR9 in antibody production to nucleic acids. Although self-reactive B cells are tolerized by various mechanisms including deletion, anergy, and receptor editing, T cell tolerance is also crucial in self-tolerance of B cells to protein self-antigen because self-reactive T cells induce autoantibody production to these self-antigens. However, presence of T cell-independent mechanism suggests that T cell tolerance is not able to maintain B cell tolerance to non-protein self-antigens. Lines of evidence suggest that B cell response to non-protein self-antigens such as nucleic acids and gangliosides, sialic acid-containing glycolipids, are suppressed by inhibitory B cell co-receptors CD72 and Siglec-G, respectively. These inhibitory co-receptors recognize non-protein self-antigens and suppress BCR signaling induced by these antigens, thereby inhibiting B cell response to these self-antigens. Inhibitory B cell co-receptors appear to be involved in B cell self-tolerance to non-protein self-antigens that can activate B cells by T cell-independent mechanisms.
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Affiliation(s)
- Takeshi Tsubata
- Department of Immunology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
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29
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Green K, Wittenborn TR, Fahlquist-Hagert C, Terczynska-Dyla E, van Campen N, Jensen L, Reinert L, Hartmann R, Paludan SR, Degn SE. B Cell Intrinsic STING Signaling Is Not Required for Autoreactive Germinal Center Participation. Front Immunol 2021; 12:782558. [PMID: 34938294 PMCID: PMC8685402 DOI: 10.3389/fimmu.2021.782558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 11/17/2021] [Indexed: 01/16/2023] Open
Abstract
Germinal centers (GCs) are induced microanatomical structures wherein B cells undergo affinity maturation to improve the quality of the antibody response. Although GCs are crucial to appropriate humoral responses to infectious challenges and vaccines, many questions remain about the molecular signals driving B cell participation in GC responses. The cyclic GMP-AMP synthase (cGAS)-stimulator of interferon genes (STING) pathway is an important mediator of type I interferon and proinflammatory cytokine responses during infection and cellular stress. Recent studies have reported important roles for STING in B cell responses, including an impact on GC B cells and downstream antibody responses, which could have great consequences for vaccine design and understanding STING-associated interferonopathies. GCs are also involved in untoward reactions to autoantigens in a plethora of autoimmune disorders, and it is generally thought that these responses coopt the mechanisms used in foreign antigen-directed GCs. Here, we set out to investigate the importance of the cGAS-STING pathway in autoreactive B cell responses. In a direct competition scenario in a murine mixed bone marrow chimera model of autoreactive GCs, we find that B cell intrinsic deficiency of cGAS, STING, or the type I interferon receptor IFNAR, does not impair GC participation, whereas Toll-like receptor (TLR)-7 deficiency mediates a near-complete block. Our findings suggest that physiological B cell responses are strictly sustained by signals linked to BCR-mediated endocytosis. This wiring of B cell signals may enable appropriate antibody responses, while at the same time restricting aberrant antibody responses during infections and in autoimmune or autoinflammatory settings.
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Affiliation(s)
- Kenneth Green
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | | | | | | | - Nina van Campen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Biomedical Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Lisbeth Jensen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Line Reinert
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Rune Hartmann
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Søren R Paludan
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Søren E Degn
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
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30
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Bortone F, Scandiffio L, Cavalcante P, Mantegazza R, Bernasconi P. Epstein-Barr Virus in Myasthenia Gravis: Key Contributing Factor Linking Innate Immunity with B-Cell-Mediated Autoimmunity. Infect Dis (Lond) 2021. [DOI: 10.5772/intechopen.93777] [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] [Indexed: 11/08/2022] Open
Abstract
Epstein-Barr virus (EBV), a common human herpes virus latently infecting most of the world’s population with periodic reactivations, is the main environmental factor suspected to trigger and/or sustain autoimmunity by its ability to disrupt B-cell tolerance checkpoints. Myasthenia gravis (MG) is a prototypic autoimmune disorder, mostly caused by autoantibodies to acetylcholine receptor (AChR) of the neuromuscular junction, which cause muscle weakness and fatigability. Most patients display hyperplastic thymus, characterized by ectopic germinal center formation, chronic inflammation, exacerbated Toll-like receptor activation, and abnormal B-cell activation. After an overview on MG clinical features and intra-thymic pathogenesis, in the present chapter, we describe our main findings on EBV presence in MG thymuses, including hyperplastic and thymoma thymuses, in relationship with innate immunity activation and data from other autoimmune conditions. Our overall data strongly indicate a critical contribution of EBV to innate immune dysregulation and sustained B-cell-mediated autoimmune response in the pathological thymus of MG patients.
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31
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Satterthwaite AB. TLR7 Signaling in Lupus B Cells: New Insights into Synergizing Factors and Downstream Signals. Curr Rheumatol Rep 2021; 23:80. [PMID: 34817709 DOI: 10.1007/s11926-021-01047-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/06/2021] [Indexed: 12/19/2022]
Abstract
PURPOSE OF THE REVIEW Systemic lupus erythematosus (SLE) is driven by nucleic acid-containing antigens that stimulate endosomal TLRs. We review new advances in our understanding of how TLR7 signaling in B cells drives autoimmunity. RECENT FINDINGS Pathogenic B cell responses to TLR7 engagement are shaped by the disease-associated cytokine environment. TLR7, IFNγ, and IL-21 together promote the formation of autoreactive germinal centers and the ABC/DN2 B cell subset. BAFF and type 1 IFNs enhance autoantibody production from transitional B cells in concert with TLR7. TLR7 signaling components STAT1, BANK1, IRF5, SLC15A4, and CXorf21/TASL are associated genetically with SLE and important for lupus development in mice, while role of T-bet is controversial. Proper control of TLR7 trafficking by UNC93B1, syntenin-1, and αvβ3 integrin is critical for preventing autoimmunity. A better understanding of TLR7 signaling has revealed potential new therapeutic approaches for SLE, several of which are being tested in animal models or clinical trials.
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Affiliation(s)
- Anne B Satterthwaite
- Department of Internal Medicine, Rheumatic Diseases Division and Department of Immunology, UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX, 75390-8884, USA.
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32
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Regulation of B Cell Responses in SLE by Three Classes of Interferons. Int J Mol Sci 2021; 22:ijms221910464. [PMID: 34638804 PMCID: PMC8508684 DOI: 10.3390/ijms221910464] [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: 08/26/2021] [Revised: 09/24/2021] [Accepted: 09/24/2021] [Indexed: 12/24/2022] Open
Abstract
There are three classes of interferons (type 1, 2, and 3) that can contribute to the development and maintenance of various autoimmune diseases, including systemic lupus erythematosus (SLE). Each class of interferons promotes the generation of autoreactive B cells and SLE-associated autoantibodies by distinct signaling mechanisms. SLE patients treated with various type 1 interferon-blocking biologics have diverse outcomes, suggesting that additional environmental and genetic factors may dictate how these cytokines contribute to the development of autoreactive B cells and SLE. Understanding how each class of interferons controls B cell responses in SLE is necessary for developing optimized B cell- and interferon-targeted therapeutics. In this review, we will discuss how each class of interferons differentially promotes the loss of peripheral B cell tolerance and leads to the development of autoreactive B cells, autoantibodies, and SLE.
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33
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Canny SP, Jackson SW. B Cells in Systemic Lupus Erythematosus: From Disease Mechanisms to Targeted Therapies. Rheum Dis Clin North Am 2021; 47:395-413. [PMID: 34215370 PMCID: PMC8357318 DOI: 10.1016/j.rdc.2021.04.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
B cells exert a prominent contribution to the pathogenesis of systemic lupus erythematosus (SLE). Here, we review the immune mechanisms underlying autoreactive B cell activation in SLE, focusing on how B cell receptor and Toll-like receptor signals integrate to drive breaks in tolerance to nuclear antigens. In addition, we discuss autoantibody-dependent and autoantibody-independent B cell effector functions during lupus pathogenesis. Finally, we address efforts to target B cells therapeutically in human SLE. Despite initial disappointing clinical trials testing B cell depletion in lupus, more recent studies show promise, emphasizing how greater understanding of underlying immune mechanisms can yield clinical benefits.
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Affiliation(s)
- Susan P Canny
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA; Benaroya Research Institute, 1201 Ninth Avenue, Seattle, WA 98101, USA
| | - Shaun W Jackson
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA; Seattle Children's Research Institute, Seattle, WA, USA.
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34
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Schell SL, Bricker KN, Fike AJ, Chodisetti SB, Domeier PP, Choi NM, Fasnacht MJ, Luckenbill SA, Ziegler SF, Rahman ZSM. Context-Dependent miR-21 Regulation of TLR7-Mediated Autoimmune and Foreign Antigen-Driven Antibody-Forming Cell and Germinal Center Responses. THE JOURNAL OF IMMUNOLOGY 2021; 206:2803-2818. [PMID: 34039637 DOI: 10.4049/jimmunol.2001039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 04/01/2021] [Indexed: 01/03/2023]
Abstract
MicroRNAs (miRNAs) are involved in healthy B cell responses and the loss of tolerance in systemic lupus erythematosus (SLE), although the role of many miRNAs remains poorly understood. Dampening miR-21 activity was previously shown to reduce splenomegaly and blood urea nitrogen levels in SLE-prone mice, but the detailed cellular responses and mechanism of action remains unexplored. In this study, using the TLR7 agonist, imiquimod-induced SLE model, we observed that loss of miR-21 in Sle1b mice prevented the formation of plasma cells and autoantibody-producing Ab-forming cells (AFCs) without a significant effect on the magnitude of the germinal center (GC) response. We further observed reduced dendritic cell and monocyte numbers in the spleens of miR-21-deficient Sle1b mice that were associated with reduced IFN, proinflammatory cytokines, and effector CD4+ T cell responses. RNA sequencing analysis on B cells from miR-21-deficient Sle1b mice revealed reduced activation and response to IFN, and cytokine and target array analysis revealed modulation of numerous miR-21 target genes in response to TLR7 activation and type I IFN stimulation. Our findings in the B6.Sle1bYaa (Sle1b Yaa) spontaneous model recapitulated the miR-21 role in TLR7-induced responses with an additional role in autoimmune GC and T follicular helper responses. Finally, immunization with T-dependent Ag revealed a role for miR-21 in foreign Ag-driven GC and Ab, but not AFC, responses. Our data suggest a potential multifaceted, context-dependent role for miR-21 in autoimmune and foreign Ag-driven AFC and GC responses. Further study is warranted to delineate the cell-intrinsic requirements and mechanisms of miR-21 during infection and SLE development.
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Affiliation(s)
- Stephanie L Schell
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA; and
| | - Kristen N Bricker
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA; and
| | - Adam J Fike
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA; and
| | - Sathi Babu Chodisetti
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA; and
| | | | - Nicholas M Choi
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA; and
| | - Melinda J Fasnacht
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA; and
| | - Sara A Luckenbill
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA; and
| | | | - Ziaur S M Rahman
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA; and
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35
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Joosse BA, Jackson JH, Cisneros A, Santhin AB, Smith SA, Moore DJ, Crofford LJ, Wilfong EM, Bonami RH. High-Throughput Detection of Autoantigen-Specific B Cells Among Distinct Functional Subsets in Autoimmune Donors. Front Immunol 2021; 12:685718. [PMID: 34234784 PMCID: PMC8256427 DOI: 10.3389/fimmu.2021.685718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/06/2021] [Indexed: 11/17/2022] Open
Abstract
Antigen-specific B cells (ASBCs) can drive autoimmune disease by presenting autoantigen to cognate T cells to drive their activation, proliferation, and effector cell differentiation and/or by differentiating into autoantibody-secreting cells. Autoantibodies are frequently used to predict risk and diagnose several autoimmune diseases. ASBCs can drive type 1 diabetes even when immune tolerance mechanisms block their differentiation into antibody-secreting cells. Furthermore, anti-histidyl tRNA synthetase syndrome patients have expanded IgM+ Jo-1-binding B cells, which clinically diagnostic IgG Jo-1 autoantibodies may not fully reflect. Given the potential disconnect between the pathologic function of ASBCs and autoantibody secretion, direct study of ASBCs is a necessary step towards developing better therapies for autoimmune diseases, which often have no available cure. We therefore developed a high-throughput screening pipeline to 1) phenotypically identify specific B cell subsets, 2) expand them in vitro, 3) drive them to secrete BCRs as antibody, and 4) identify wells enriched for ASBCs through ELISA detection of antibody. We tested the capacity of several B cell subset(s) to differentiate into antibody-secreting cells following this robust stimulation. IgM+ and/or IgD+, CD27- memory, memory, switched memory, and BND B cells secreted B cell receptor (BCR) as antibody following in vitro stimulation, whereas few plasmablasts responded. Bimodal responses were observed across autoimmune donors for IgM+ CD21lo and IgM- CD21lo B cells, consistent with documented heterogeneity within the CD21lo subset. Using this approach, we detected insulin-binding B cell bias towards CD27- memory and CD27+ memory subsets in pre-symptomatic type 1 diabetes donors. We took advantage of routine detection of Jo-1-binding B cells in Jo-1+ anti-histidyl tRNA synthetase syndrome patients to show that Jo-1-binding B cells and total B cells expanded 20-30-fold using this culture system. Overall, these studies highlight technology that is amenable to small numbers of cryopreserved peripheral blood mononuclear cells that enables interrogation of phenotypic and repertoire attributes of ASBCs derived from autoimmune patients.
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Affiliation(s)
- Bryan A Joosse
- Department of Medicine, Division of Rheumatology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - James H Jackson
- Department of Medicine, Division of Rheumatology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States.,Department of Biomedical Sciences, School of Medicine Greenville, University of South Carolina, Greenville, SC, United States
| | - Alberto Cisneros
- Department of Medicine, Division of Rheumatology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Austin B Santhin
- Department of Medicine, Division of Rheumatology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Scott A Smith
- Department of Medicine, Division of Infectious Diseases, Vanderbilt University Medical Center, Nashville, TN, United States.,Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States.,Vanderbilt Institute for Infection, Immunology, and Inflammation (VI4), Nashville, TN, United States
| | - Daniel J Moore
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States.,Vanderbilt Institute for Infection, Immunology, and Inflammation (VI4), Nashville, TN, United States.,Department of Pediatrics, Division of Endocrinology & Diabetes, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Leslie J Crofford
- Department of Medicine, Division of Rheumatology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States.,Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States.,Vanderbilt Institute for Infection, Immunology, and Inflammation (VI4), Nashville, TN, United States
| | - Erin M Wilfong
- Department of Medicine, Division of Rheumatology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States.,Department of Medicine, Allergy, Pulmonary, and Critical Care, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Rachel H Bonami
- Department of Medicine, Division of Rheumatology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States.,Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States.,Vanderbilt Institute for Infection, Immunology, and Inflammation (VI4), Nashville, TN, United States
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36
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Elsner RA, Shlomchik MJ. Germinal Center and Extrafollicular B Cell Responses in Vaccination, Immunity, and Autoimmunity. Immunity 2021; 53:1136-1150. [PMID: 33326765 DOI: 10.1016/j.immuni.2020.11.006] [Citation(s) in RCA: 205] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/19/2020] [Accepted: 11/11/2020] [Indexed: 02/07/2023]
Abstract
Activated B cells participate in either extrafollicular (EF) or germinal center (GC) responses. Canonical responses are composed of a short wave of plasmablasts (PBs) arising from EF sites, followed by GC producing somatically mutated memory B cells (MBC) and long-lived plasma cells. However, somatic hypermutation (SHM) and affinity maturation can take place at both sites, and a substantial fraction of MBC are produced prior to GC formation. Infection responses range from GC responses that persist for months to persistent EF responses with dominant suppression of GCs. Here, we review the current understanding of the functional output of EF and GC responses and the molecular switches promoting them. We discuss the signals that regulate the magnitude and duration of these responses, and outline gaps in knowledge and important areas of inquiry. Understanding such molecular switches will be critical for vaccine development, interpretation of vaccine efficacy and the treatment for autoimmune diseases.
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Affiliation(s)
- Rebecca A Elsner
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15216, USA
| | - Mark J Shlomchik
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15216, USA.
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37
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Munroe ME, Anderson JR, Gross TF, Stunz LL, Bishop GA, James JA. Epstein-Barr Functional Mimicry: Pathogenicity of Oncogenic Latent Membrane Protein-1 in Systemic Lupus Erythematosus and Autoimmunity. Front Immunol 2021; 11:606936. [PMID: 33613527 PMCID: PMC7886997 DOI: 10.3389/fimmu.2020.606936] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 12/21/2020] [Indexed: 11/16/2022] Open
Abstract
Systemic lupus erythematosus (SLE) and other autoimmune diseases are propelled by immune dysregulation and pathogenic, disease-specific autoantibodies. Autoimmunity against the lupus autoantigen Sm is associated with cross-reactivity to Epstein-Barr virus (EBV) nuclear antigen 1 (EBNA-1). Additionally, EBV latent membrane protein-1 (LMP1), initially noted for its oncogenic activity, is an aberrantly active functional mimic of the B cell co-stimulatory molecule CD40. Mice expressing a transgene (Tg) for the mCD40-LMP1 hybrid molecule (containing the cytoplasmic tail of LMP1) have mild autoantibody production and other features of immune dysregulation by 2-3 months of age, but no overt autoimmune disease. This study evaluates whether exposure to the EBV molecular mimic, EBNA-1, stimulates antigen-specific and concurrently-reactive humoral and cellular immunity, as well as lupus-like features. After immunization with EBNA-1, mCD40-LMP1 Tg mice exhibited enhanced, antigen-specific, cellular and humoral responses compared to immunized WT congenic mice. EBNA-1 specific proliferative and inflammatory cytokine responses, including IL-17 and IFN-γ, were significantly increased (p<0.0001) in mCD40-LMP1 Tg mice, as well as antibody responses to amino- and carboxy-domains of EBNA-1. Of particular interest was the ability of mCD40-LMP1 to drive EBNA-1 associated molecular mimicry with the lupus-associated autoantigen, Sm. EBNA-1 immunized mCD40-LMP1 Tg mice exhibited enhanced proliferative and cytokine cellular responses (p<0.0001) to the EBNA-1 homologous epitope PPPGRRP and the Sm B/B' cross-reactive sequence PPPGMRPP. When immunized with the SLE autoantigen Sm, mCD40-LMP1 Tg mice again exhibited enhanced cellular and humoral immune responses to both Sm and EBNA-1. Cellular immune dysregulation with EBNA-1 immunization in mCD40-LMP1 Tg mice was accompanied by enhanced splenomegaly, increased serum blood urea nitrogen (BUN) and creatinine levels, and elevated anti-dsDNA and antinuclear antibody (ANA) levels (p<0.0001 compared to mCD40 WT mice). However, no evidence of immune-complex glomerulonephritis pathology was noted, suggesting that a combination of EBV and genetic factors may be required to drive lupus-associated renal disease. These data support that the expression of LMP1 in the context of EBNA-1 may interact to increase immune dysregulation that leads to pathogenic, autoantigen-specific lupus inflammation.
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Affiliation(s)
- Melissa E. Munroe
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, United States
| | - Jourdan R. Anderson
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, United States
| | - Timothy F. Gross
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, United States
| | - Laura L. Stunz
- Department of Microbiology & Immunology, The University of Iowa, Iowa City, IA, United States
| | - Gail A. Bishop
- Department of Microbiology & Immunology, The University of Iowa, Iowa City, IA, United States
- Department of Internal Medicine, The University of Iowa, Iowa City, IA, United States
- Holden Comprehensive Cancer Center, The University of Iowa, Iowa City, IA, United States
- Iowa City VA Medical Center, Iowa City, IA, United States
| | - Judith A. James
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, United States
- Department of Medicine and Pathology, Oklahoma University Health Sciences Center, Oklahoma City, OK, United States
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38
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Abstract
B lymphocytes have a central role in autoimmune diseases, which are often defined by specific autoantibody patterns and feature a loss of B cell tolerance. A prototypic disease associated with B cell hyperactivity is systemic lupus erythematosus (SLE). In patients with SLE, the loss of B cell tolerance to autoantigens is controlled in a cell-intrinsic manner by Toll-like receptors (TLRs), which sense nucleic acids in endosomes. TLR7 drives the extrafollicular B cell response and the germinal centre reaction that are involved in autoantibody production and disease pathogenesis. Surprisingly, TLR9 seems to protect against SLE, even though it is required for the production of autoantibodies recognizing double-stranded DNA-associated antigens, which are abundant in SLE and are a hallmark of this disease. The protective function of TLR9 is at least partly mediated by its capacity to limit the stimulatory activity of TLR7. The roles of TLR7 and TLR9 in the effector function of B cells in lupus-like disease and in patients with SLE, and the unique features of TLR signalling in B cells, suggest that targeting TLR signalling in SLE might be therapeutically beneficial. Loss of B cell tolerance to autoantigens in systemic lupus erythematosus (SLE) is driven by TLR7, whereas TLR9 appears to protect against SLE by limiting the stimulatory activity of TLR7. The unique features of Toll-like receptor signalling in B cells implicate it as a therapeutic target in SLE. Intrinsic TLR7 and TLR9 signalling in B cells plays an important role in the development and pathogenesis of systemic lupus erythematosus (SLE). In patients with SLE, effector plasma cells are generated via the extrafollicular response and via the formation of spontaneous germinal centres. TLR7 plays key roles in the extrafollicular response and the response mediated by germinal centres. Some plasma cells produce IL-10 and can have protective roles in lupus-like disease.
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39
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Mousavi MJ, Mahmoudi M, Ghotloo S. Escape from X chromosome inactivation and female bias of autoimmune diseases. Mol Med 2020; 26:127. [PMID: 33297945 PMCID: PMC7727198 DOI: 10.1186/s10020-020-00256-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 12/02/2020] [Indexed: 12/13/2022] Open
Abstract
Generally, autoimmune diseases are more prevalent in females than males. Various predisposing factors, including female sex hormones, X chromosome genes, and the microbiome have been implicated in the female bias of autoimmune diseases. During embryogenesis, one of the X chromosomes in the females is transcriptionally inactivated, in a process called X chromosome inactivation (XCI). This equalizes the impact of two X chromosomes in the females. However, some genes escape from XCI, providing a basis for the dual expression dosage of the given gene in the females. In the present review, the contribution of the escape genes to the female bias of autoimmune diseases will be discussed.
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Affiliation(s)
- Mohammad Javad Mousavi
- Department of Hematology, Faculty of Allied Medicine, Bushehr University of Medical Sciences, Bushehr, Iran.,Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mahdi Mahmoudi
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Somayeh Ghotloo
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Kashan University of Medical Sciences, Kashan, Iran.
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40
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Garimella MG, He C, Chen G, Li QZ, Huang X, Karlsson MCI. The B cell response to both protein and nucleic acid antigens displayed on apoptotic cells are dependent on endosomal pattern recognition receptors. J Autoimmun 2020; 117:102582. [PMID: 33296829 DOI: 10.1016/j.jaut.2020.102582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/19/2020] [Accepted: 11/23/2020] [Indexed: 12/13/2022]
Abstract
In systemic autoimmune diseases such as systemic lupus erythematosus (SLE), B cell tolerance is lost and there is a production of autoantibodies that drive pathology. The specificities of these antibodies are towards a wide range of autoantigens including proteins such as serum factors including cytokines as well as towards nucleic acids and modified glycolipids. It is known that endosomal pattern recognition receptors are involved in specific responses but if they drive specificity towards a specific group of autoantigens is not known. Here, we used syngeneic apoptotic cells alone to break B cell tolerance and investigated the antibody response in Unc93b1 mutant mice that lack signalling from the TLR3, TLR7 and TLR9 receptors. We found that specific B cell responses known from patients with SLE including antibodies towards Ro-52/60, La, cardiolipin as well as DNA were all significantly lower in the knockout mice. Thus, we found that endosomal TLR receptors were involved in break of tolerance and drive B cell responses for protein, nucleic acid and modified lipid antigens. This pinpoints these receptors as key drivers for the full range of antibody driven pathology in SLE and suggests that targeting of endosomal TLR driven responses will quench all B cell driven autoreactivity.
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Affiliation(s)
- Manasa G Garimella
- Department of Microbiology, Tumour and Cell Biology, Karolinska Institutet Biomedicum, Stockholm, 17165, Sweden
| | - Chenfei He
- Department of Microbiology, Tumour and Cell Biology, Karolinska Institutet Biomedicum, Stockholm, 17165, Sweden
| | - Guangchun Chen
- Microarray Core, Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Quan-Zhen Li
- Microarray Core, Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Xin Huang
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Mikael C I Karlsson
- Department of Microbiology, Tumour and Cell Biology, Karolinska Institutet Biomedicum, Stockholm, 17165, Sweden.
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41
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Ren Q, Cheng L, Yi J, Ma L, Pan J, Gou SJ, Fu P. Toll-like Receptors as Potential Therapeutic Targets in Kidney Diseases. Curr Med Chem 2020; 27:5829-5854. [PMID: 31161985 DOI: 10.2174/0929867325666190603110907] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 03/15/2019] [Accepted: 05/13/2019] [Indexed: 02/08/2023]
Abstract
Toll-like Receptors (TLRs) are members of pattern recognition receptors and serve a pivotal role in host immunity. TLRs response to pathogen-associated molecular patterns encoded by pathogens or damage-associated molecular patterns released by dying cells, initiating an inflammatory cascade, where both beneficial and detrimental effects can be exerted. Accumulated evidence has revealed that TLRs are closely associated with various kidney diseases but their roles are still not well understood. This review updated evidence on the roles of TLRs in the pathogenesis of kidney diseases including urinary tract infection, glomerulonephritis, acute kidney injury, transplant allograft dysfunction and chronic kidney diseases.
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Affiliation(s)
- Qian Ren
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Lu Cheng
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Jing Yi
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Liang Ma
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Jing Pan
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Shen-Ju Gou
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Ping Fu
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
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Chodisetti SB, Fike AJ, Domeier PP, Choi NM, Soni C, Rahman ZSM. TLR7 Negatively Regulates B10 Cells Predominantly in an IFNγ Signaling Dependent Manner. Front Immunol 2020; 11:1632. [PMID: 32849556 PMCID: PMC7399053 DOI: 10.3389/fimmu.2020.01632] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/18/2020] [Indexed: 01/12/2023] Open
Abstract
IL-10 producing B cells (B10 cells) play an important immunoregulatory role in various autoimmune and infection conditions. However, the factors that regulate their development and maintenance are incompletely understood. Recently, we and others have established a requirement for TLR7 in promoting autoimmune antibody forming cell (AFC) and germinal center (GC) responses. Here we report an important additional role of TLR7 in the negative regulation of B10 cell development. TLR7 overexpression or overstimulation promoted the reduction of B10 cells whereas TLR7 deficiency rescued these cells in both non-autoimmune and autoimmune-prone mice. TLR7 expression was further inversely correlated with B cell-dependent IL-10 production and its inhibition of CD4 T cell proliferation and IFNγ production in an in vitro B cell and T cell co-culture system. Further, B10 cells displayed elevated TLR7, IFNγR, and STAT1 expression compared to non-B10 cells. Interestingly, deficiency of IFNγR in TLR7 overexpressing lupus-prone mice rescued B10 cells from TLR7-mediated reduction. Finally, B cell intrinsic deletion of IFNγR was sufficient to restore B10 cells in the spleens of TLR7-promoted autoimmune mouse model. In conclusion, our findings demonstrate a novel role for the IFNγR-STAT1 pathway in TLR7-mediated negative regulation of B10 cell development.
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Affiliation(s)
- Sathi Babu Chodisetti
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Adam J Fike
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Phillip P Domeier
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Nicholas M Choi
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Chetna Soni
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Ziaur S M Rahman
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA, United States
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43
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Soni C, Perez OA, Voss WN, Pucella JN, Serpas L, Mehl J, Ching KL, Goike J, Georgiou G, Ippolito GC, Sisirak V, Reizis B. Plasmacytoid Dendritic Cells and Type I Interferon Promote Extrafollicular B Cell Responses to Extracellular Self-DNA. Immunity 2020; 52:1022-1038.e7. [PMID: 32454024 PMCID: PMC7306002 DOI: 10.1016/j.immuni.2020.04.015] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 03/13/2020] [Accepted: 04/23/2020] [Indexed: 01/06/2023]
Abstract
Class-switched antibodies to double-stranded DNA (dsDNA) are prevalent and pathogenic in systemic lupus erythematosus (SLE), yet mechanisms of their development remain poorly understood. Humans and mice lacking secreted DNase DNASE1L3 develop rapid anti-dsDNA antibody responses and SLE-like disease. We report that anti-DNA responses in Dnase1l3-/- mice require CD40L-mediated T cell help, but proceed independently of germinal center formation via short-lived antibody-forming cells (AFCs) localized to extrafollicular regions. Type I interferon (IFN-I) signaling and IFN-I-producing plasmacytoid dendritic cells (pDCs) facilitate the differentiation of DNA-reactive AFCs in vivo and in vitro and are required for downstream manifestations of autoimmunity. Moreover, the endosomal DNA sensor TLR9 promotes anti-dsDNA responses and SLE-like disease in Dnase1l3-/- mice redundantly with another nucleic acid-sensing receptor, TLR7. These results establish extrafollicular B cell differentiation into short-lived AFCs as a key mechanism of anti-DNA autoreactivity and reveal a major contribution of pDCs, endosomal Toll-like receptors (TLRs), and IFN-I to this pathway.
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Affiliation(s)
- Chetna Soni
- Department of Pathology, New York University Grossman School of Medicine, New York, NY 10016, USA
| | - Oriana A Perez
- Department of Pathology, New York University Grossman School of Medicine, New York, NY 10016, USA
| | - William N Voss
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA
| | - Joseph N Pucella
- Department of Pathology, New York University Grossman School of Medicine, New York, NY 10016, USA
| | - Lee Serpas
- Department of Pathology, New York University Grossman School of Medicine, New York, NY 10016, USA
| | - Justin Mehl
- Department of Pathology, New York University Grossman School of Medicine, New York, NY 10016, USA
| | - Krystal L Ching
- Department of Pathology, New York University Grossman School of Medicine, New York, NY 10016, USA
| | - Jule Goike
- Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - George Georgiou
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA; Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - Gregory C Ippolito
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA; Department of Oncology, Dell Medical School, University of Texas at Austin, Austin, TX 78712, USA
| | - Vanja Sisirak
- CNRS-UMR 5164, ImmunoConcEpt, Université de Bordeaux, 33076 Bordeaux, France.
| | - Boris Reizis
- Department of Pathology, New York University Grossman School of Medicine, New York, NY 10016, USA; Department of Medicine, New York University Grossman School of Medicine, New York, NY 10016, USA.
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44
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Zou Z, Du D, Miao Y, Yang Y, Xie Y, Li Z, Zhou L, Zhang L, Zhou P, Jiang F. TJ-M2010-5, a novel MyD88 inhibitor, corrects R848-induced lupus-like immune disorders of B cells in vitro. Int Immunopharmacol 2020; 85:106648. [PMID: 32504998 DOI: 10.1016/j.intimp.2020.106648] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/12/2020] [Accepted: 05/27/2020] [Indexed: 12/12/2022]
Abstract
B cell hyperactivities are involved in the development of systemic lupus erythematosus (SLE). Toll-like receptor 7 (TLR7) in the B cells plays a pivotal role in the pathogenesis of SLE. Previous studies have focused on the intrinsic role of B cells in TLR7/MyD88 signaling and consequently on immune activation, autoantibody production, and systemic inflammation. However, a feasible treatment for this immune disorder remains to be discovered. The in vitro cellular response that have been studied likely plays a central role in the production of some important autoantibodies in SLE. We successfully used R848 to build a lupus-like B cell model in vitro; these B cells were overactivated, differentiated into plasma cells, escaped apoptosis, massively proliferated, and produced large amounts of autoantibodies and cytokines. In the present study, we found that TJ-M2010-5, a novel MyD88 inhibitor previously synthesized in our lab, seemed to inhibit the lupus-like condition of B cells, including overactivation, massive proliferation, differentiation into plasma cells, and overproduction of autoantibodies and cytokines. TJ-M2010-5 also induce B cells apoptosis. Furthermore, TJ-M2010-5 was found to remarkably inhibit NF-κB and MAPK signaling. In summary, TJ-M2010-5 might correct R848-induced lupus-like immune disorders of B cells by blocking the TLR7/MyD88/NF-κB and TLR7/MyD88/MAPK signaling pathways.
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Affiliation(s)
- Zhimiao Zou
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Dunfeng Du
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Yan Miao
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Yang Yang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Yalong Xie
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Zeyang Li
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Liang Zhou
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Limin Zhang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Ping Zhou
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China.
| | - Fengchao Jiang
- Academy of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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Stögerer T, Stäger S. Innate Immune Sensing by Cells of the Adaptive Immune System. Front Immunol 2020; 11:1081. [PMID: 32547564 PMCID: PMC7274159 DOI: 10.3389/fimmu.2020.01081] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 05/05/2020] [Indexed: 01/05/2023] Open
Abstract
Sensing of microbes or of danger signals has mainly been attributed to myeloid innate immune cells. However, T and B cells also express functional pattern recognition receptors (PRRs). In these cells, PRRs mediate signaling cascades that result in different functions depending on the cell's activation and/or differentiation status, on the environment, and on the ligand/agonist. Some of these functions are beneficial for the host; however, some are detrimental and are exploited by pathogens to establish persistent infections. In this review, we summarize the available literature on innate immune sensing by cells of the adaptive immune system and discuss possible implications for chronic infections.
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Affiliation(s)
- Tanja Stögerer
- INRS Centre Armand-Frappier Santé Biotechnologie, Laval, QC, Canada
| | - Simona Stäger
- INRS Centre Armand-Frappier Santé Biotechnologie, Laval, QC, Canada
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46
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The CD153 vaccine is a senotherapeutic option for preventing the accumulation of senescent T cells in mice. Nat Commun 2020; 11:2482. [PMID: 32424156 PMCID: PMC7235045 DOI: 10.1038/s41467-020-16347-w] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 04/22/2020] [Indexed: 12/26/2022] Open
Abstract
Senotherapy targeting for senescent cells is designed to attenuate age-related dysfunction. Senescent T cells, defined as CD4+ CD44high CD62Llow PD-1+ CD153+ cells, accumulate in visceral adipose tissues (VAT) in obese individuals. Here, we show the long-lasting effect of using CD153 vaccination to remove senescent T cells from high-fat diet (HFD)-induced obese C57BL/6J mice. We administered a CD153 peptide-KLH (keyhole limpet hemocyanin) conjugate vaccine with Alhydrogel (CD153-Alum) or CpG oligodeoxynucleotide (ODN) 1585 (CD153-CpG) and confirmed an increase in anti-CD153 antibody levels that was sustained for several months. After being fed a HFD for 10–11 weeks, adipose senescent T cell accumulation was significantly reduced in the VAT of CD153-CpG-vaccinated mice, accompanied by glucose tolerance and insulin resistance. A complement-dependent cytotoxicity (CDC) assay indicated that the mouse IgG2 antibody produced in the CD153-CpG-vaccinated mice successfully reduced the number of senescent T cells. The CD153-CpG vaccine is an optional tool for senolytic therapy. Senotherapy, the removal of aged T cells, is an effective approach to attenuate age-related diseases. Here the authors report a CD153 targeting vaccine that prevents the accumulation of senescent adipose tissue T cells in mice on high-fat diet, which is associated with improved glucose tolerance.
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47
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Hua Z, Hou B. The role of B cell antigen presentation in the initiation of CD4+ T cell response. Immunol Rev 2020; 296:24-35. [PMID: 32304104 DOI: 10.1111/imr.12859] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/29/2020] [Accepted: 03/26/2020] [Indexed: 01/21/2023]
Abstract
B cells have been known for their ability to present antigens to T cells for almost 40 years. However, the precise roles of B cell antigen presentation in various immune responses are not completely understood. The term "professional" antigen-presenting cells (APCs) was proposed to distinguish APCs that are required for initiating the immune responses from those use antigen presentation to enhance their own effector functions. Unlike dendritic cells, which are defined as professional APCs for their well-established functions in activating naive T cells, B cells have been shown in the past to mostly present antigens to activated CD4+ T cells mainly to seek help from T helper cells. However, recent evidence suggested that B cells can act as professional APCs under infectious conditions or conditions mimicking viral infections. B cell antigen receptors (BCRs) and the innate receptor Toll-like receptors are activated synergistically in response to pathogens or virus-like particles, under which conditions B cells are not only potent but also the predominant APCs to turn naive CD4+ T cells into T follicular helper cells. The discovery of B cells as professional APCs to initiate CD4+ T cell response provides a new insight for both autoimmune diseases and vaccine development.
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Affiliation(s)
- Zhaolin Hua
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Baidong Hou
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
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48
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Minato N, Hattori M, Hamazaki Y. Physiology and pathology of T-cell aging. Int Immunol 2020; 32:223-231. [PMID: 31967307 PMCID: PMC7150735 DOI: 10.1093/intimm/dxaa006] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 01/21/2020] [Indexed: 12/30/2022] Open
Abstract
Acquired immune function shows recognizable changes over time with organismal aging. These changes include T-cell dysfunction, which may underlie diminished resistance to infection and possibly various chronic age-associated diseases in the elderly. T-cell dysfunction may occur at distinct stages, from naive cells to the end stages of differentiation during immune responses. The thymus, which generates naive T cells, shows unusually early involution resulting in progressive reduction of T-cell output after adolescence, but peripheral T-cell numbers are maintained through antigen-independent homeostatic proliferation of naive T cells driven by the major histocompatibility complex associated with self-peptides and homeostatic cytokines, retaining the diverse repertoire. However, extensive homeostatic proliferation may lead to the emergence of dysfunctional CD4+ T cells with features resembling senescent cells, termed senescence-associated T (SA-T) cells, which increase and accumulate with age. In situations such as chronic viral infection, T-cell dysfunction may also develop via persistent antigen stimulation, termed exhaustion, preventing possible immunopathology due to excessive immune responses. Exhausted T cells are developed through the effects of checkpoint receptors such as PD-1 and may be reversed with the receptor blockade. Of note, although defective in their regular T-cell antigen-receptor-mediated proliferation, SA-T cells secrete abundant pro-inflammatory factors such as osteopontin, reminiscent of an SA-secretory phenotype. A series of experiments in mouse models indicated that SA-T cells are involved in systemic autoimmunity as well as chronic tissue inflammation following tissue stresses. In this review, we discuss the physiological aspects of T-cell dysfunction associated with aging and its potential pathological involvement in age-associated diseases and possibly cancer.
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Affiliation(s)
- Nagahiro Minato
- Medical Innovation Center, Graduate School of Medicine, Kyoto, Japan
| | - Masakazu Hattori
- Medical Innovation Center, Graduate School of Medicine, Kyoto, Japan
| | - Yoko Hamazaki
- Laboratory of Immunobiology, Center for iPS Research and Application, Kyoto University, Kyoto, Japan
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49
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Chodisetti SB, Fike AJ, Domeier PP, Singh H, Choi NM, Corradetti C, Kawasawa YI, Cooper TK, Caricchio R, Rahman ZSM. Type II but Not Type I IFN Signaling Is Indispensable for TLR7-Promoted Development of Autoreactive B Cells and Systemic Autoimmunity. THE JOURNAL OF IMMUNOLOGY 2020; 204:796-809. [PMID: 31900342 DOI: 10.4049/jimmunol.1901175] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 11/18/2019] [Indexed: 01/12/2023]
Abstract
TLR7 is associated with development of systemic lupus erythematosus (SLE), but the underlying mechanisms are incompletely understood. Although TLRs are known to activate type I IFN (T1IFN) signaling, the role of T1IFN and IFN-γ signaling in differential regulation of TLR7-mediated Ab-forming cell (AFC) and germinal center (GC) responses, and SLE development has never been directly investigated. Using TLR7-induced and TLR7 overexpression models of SLE, we report in this study a previously unrecognized indispensable role of TLR7-induced IFN-γ signaling in promoting AFC and GC responses, leading to autoreactive B cell and SLE development. T1IFN signaling in contrast, only modestly contributed to autoimmune responses and the disease process in these mice. TLR7 ligand imiquimod treated IFN-γ reporter mice show that CD4+ effector T cells including follicular helper T (Tfh) cells are the major producers of TLR7-induced IFN-γ. Transcriptomic analysis of splenic tissues from imiquimod-treated autoimmune-prone B6.Sle1b mice sufficient and deficient for IFN-γR indicates that TLR7-induced IFN-γ activates multiple signaling pathways to regulate TLR7-promoted SLE. Conditional deletion of Ifngr1 gene in peripheral B cells further demonstrates that TLR7-driven autoimmune AFC, GC and Tfh responses and SLE development are dependent on IFN-γ signaling in B cells. Finally, we show crucial B cell-intrinsic roles of STAT1 and T-bet in TLR7-driven GC, Tfh and plasma cell differentiation. Altogether, we uncover a nonredundant role for IFN-γ and its downstream signaling molecules STAT1 and T-bet in B cells in promoting TLR7-driven AFC, GC, and SLE development whereas T1IFN signaling moderately contributes to these processes.
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Affiliation(s)
- Sathi Babu Chodisetti
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Adam J Fike
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Phillip P Domeier
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | | | - Nicholas M Choi
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | | | - Yuka Imamura Kawasawa
- Department of Pharmacology, Institute for Personalized Medicine, Pennsylvania State University College of Medicine, Hershey, PA 17033.,Department of Biochemistry and Molecular Biology, Institute for Personalized Medicine, Pennsylvania State University College of Medicine, Hershey, PA 17033; and
| | - Timothy K Cooper
- Department of Comparative Medicine, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | | | - Ziaur S M Rahman
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA 17033;
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50
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Nakagami H. Cellular senescence and senescence‐associated T cells as a potential therapeutic target. Geriatr Gerontol Int 2019; 20:97-100. [DOI: 10.1111/ggi.13851] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 11/13/2019] [Accepted: 11/27/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Hironori Nakagami
- Department of Health Development and MedicineOsaka University Graduate School of Medicine Osaka Japan
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