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Mieliauskaitė D, Kontenis V, Šiaurys A. Lessons from Animal Models in Sjögren's Syndrome. Int J Mol Sci 2023; 24:12995. [PMID: 37629175 PMCID: PMC10454747 DOI: 10.3390/ijms241612995] [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: 07/24/2023] [Revised: 08/12/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
Primary Sjögren's syndrome (pSS) is a connective tissue disease characterized by a wide spectrum of clinical features, extending from a benign glandular disease to an aggressive systemic disorder and/or lymphoma. The pathogenesis of Sjögren's syndrome (SS) is not completely understood, but it is assumed that pathogenesis of SS is multifactorial. The studies based on the animal models of SS provided significant insight in SS disease pathogenesis and management. The aim of this review is to summarize current studies on animal models with primary SS-like symptoms and discuss the impact of these studies on better understanding pathogenesis and management of Sjögren's syndrome. Databases PubMed, Web of Science, Scopus and Cochrane library were searched for summarizing studies on animal models in SS. Available data demonstrate that animal models are highly important for our understanding of SS disease.
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Affiliation(s)
- Diana Mieliauskaitė
- State Research Institute Center for Innovative Medicine, Department of Experimental, Preventive and Clinical Medicine, LT-08406 Vilnius, Lithuania;
| | - Vilius Kontenis
- State Research Institute Center for Innovative Medicine, Department of Experimental, Preventive and Clinical Medicine, LT-08406 Vilnius, Lithuania;
| | - Almantas Šiaurys
- State Research Institute Center for Innovative Medicine, Department of Immunology, LT-08406 Vilnius, Lithuania;
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2
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Harley ITW, Allison K, Scofield RH. Polygenic autoimmune disease risk alleles impacting B cell tolerance act in concert across shared molecular networks in mouse and in humans. Front Immunol 2022; 13:953439. [PMID: 36090990 PMCID: PMC9450536 DOI: 10.3389/fimmu.2022.953439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 07/19/2022] [Indexed: 11/23/2022] Open
Abstract
Most B cells produced in the bone marrow have some level of autoreactivity. Despite efforts of central tolerance to eliminate these cells, many escape to periphery, where in healthy individuals, they are rendered functionally non-responsive to restimulation through their antigen receptor via a process termed anergy. Broad repertoire autoreactivity may reflect the chances of generating autoreactivity by stochastic use of germline immunoglobulin gene segments or active mechanisms may select autoreactive cells during egress to the naïve peripheral B cell pool. Likewise, it is unclear why in some individuals autoreactive B cell clones become activated and drive pathophysiologic changes in autoimmune diseases. Both of these remain central questions in the study of the immune system(s). In most individuals, autoimmune diseases arise from complex interplay of genetic risk factors and environmental influences. Advances in genome sequencing and increased statistical power from large autoimmune disease cohorts has led to identification of more than 200 autoimmune disease risk loci. It has been observed that autoantibodies are detectable in the serum years to decades prior to the diagnosis of autoimmune disease. Thus, current models hold that genetic defects in the pathways that control autoreactive B cell tolerance set genetic liability thresholds across multiple autoimmune diseases. Despite the fact these seminal concepts were developed in animal (especially murine) models of autoimmune disease, some perceive a disconnect between human risk alleles and those identified in murine models of autoimmune disease. Here, we synthesize the current state of the art in our understanding of human risk alleles in two prototypical autoimmune diseases - systemic lupus erythematosus (SLE) and type 1 diabetes (T1D) along with spontaneous murine disease models. We compare these risk networks to those reported in murine models of these diseases, focusing on pathways relevant to anergy and central tolerance. We highlight some differences between murine and human environmental and genetic factors that may impact autoimmune disease development and expression and may, in turn, explain some of this discrepancy. Finally, we show that there is substantial overlap between the molecular networks that define these disease states across species. Our synthesis and analysis of the current state of the field are consistent with the idea that the same molecular networks are perturbed in murine and human autoimmune disease. Based on these analyses, we anticipate that murine autoimmune disease models will continue to yield novel insights into how best to diagnose, prognose, prevent and treat human autoimmune diseases.
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Affiliation(s)
- Isaac T. W. Harley
- Division of Rheumatology, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, United States
- Human Immunology and Immunotherapy Initiative (HI3), Department of Immunology, University of Colorado School of Medicine, Aurora, CO, United States
- Rheumatology Section, Medicine Service, Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, CO, United States
| | - Kristen Allison
- Division of Rheumatology, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, United States
- Human Immunology and Immunotherapy Initiative (HI3), Department of Immunology, University of Colorado School of Medicine, Aurora, CO, United States
| | - R. Hal Scofield
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, United States
- Medical/Research Service, US Department of Veterans Affairs Medical Center, Oklahoma City, OK, United States
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3
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Gao Y, Chen Y, Zhang Z, Yu X, Zheng J. Recent Advances in Mouse Models of Sjögren's Syndrome. Front Immunol 2020; 11:1158. [PMID: 32695097 PMCID: PMC7338666 DOI: 10.3389/fimmu.2020.01158] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 05/11/2020] [Indexed: 12/15/2022] Open
Abstract
Sjögren's syndrome (SS) is a complex rheumatoid disease that mainly affects exocrine glands, resulting in xerostomia (dry mouth) and xerophthalmia (dry eye). SS is characterized by autoantibodies, infiltration into exocrine glands, and ectopic expression of MHC II molecules on glandular epithelial cells. In contrast to the well-characterized clinical and immunological features, the etiology and pathogenesis of SS remain largely unknown. Animal models are powerful research tools for elucidating the pathogenesis of human diseases. To date, many mouse models of SS, including induced models, in which disease is induced in mice, and genetic models, in which mice spontaneously develop SS-like disease, have been established. These mouse models have provided new insight into the pathogenesis of SS. In this review, we aim to provide a comprehensive overview of recent advances in the field of experimental SS.
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Affiliation(s)
- Yunzhen Gao
- Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Yan Chen
- Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Zhongjian Zhang
- Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Xinhua Yu
- Priority Area Asthma & Allergy, Research Center Borstel, Airway Research Center North (ARCN), Members of the German Center for Lung Research (DZL), Borstel, Germany
| | - Junfeng Zheng
- Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
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4
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Nemer G, El-Hachem N, Eid E, Hamie L, Bardawil T, Khalil S, El-Rassy I, Safi R, Khalil A, Abbas O, Shimomura Y, Kurban M. A novel TRAF3IP2 variant causing familial scarring alopecia with mixed features of discoid lupus erythematosus and folliculitis decalvans. Clin Genet 2020; 98:116-125. [PMID: 32350852 DOI: 10.1111/cge.13767] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 12/22/2022]
Abstract
Discoid lupus erythematosus (DLE) is an autoimmune disorder with a poorly defined etiology. Despite epidemiologic gender and ethnic biases, a clear genetic basis for DLE remains elusive. In this study, we used exome and RNA sequencing technologies to characterize a consanguineous Lebanese family with four affected individuals who presented with classical scalp DLE and generalized folliculitis. Our results unraveled a novel biallelic variant c.1313C > A leading to a missense substitution p.(Thr438Asn) in TRAF3IP2(NM_147200.3). Expression studies in cultured cells revealed mis-localization of the mutated protein. Functional characterization of the mutated protein showed significant reduction in the physical interaction with the interleukin 17-A receptor (IL17RA), while interaction with TRAF6 was unaffected. By conducting a differential genome-wide transcriptomics analysis between affected and non-affected individuals, we showed that the hair follicle differentiation pathway is drastically suppressed, whereas cytokine and inflammation responses are significantly upregulated. Furthermore, our results were highly concordant with molecular signatures in patients with DLE from a public dataset. In conclusion, this is the first report on a new putative role for TRAF3IP2 in the etiology of DLE. The identified molecular features associated with this gene could pave the way for better DLE-targeted treatment.
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Affiliation(s)
- Georges Nemer
- Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
| | - Nehme El-Hachem
- Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
- Pillar Genomics Institute of Precision Medicine, American University of Beirut, Beirut, Lebanon
| | - Edward Eid
- Dermatology, American University of Beirut, Beirut, Lebanon
| | - Lamiaa Hamie
- Dermatology, American University of Beirut, Beirut, Lebanon
| | - Tara Bardawil
- Dermatology, American University of Beirut, Beirut, Lebanon
| | - Samar Khalil
- Dermatology, American University of Beirut, Beirut, Lebanon
| | - Inaam El-Rassy
- Pillar Genomics Institute of Precision Medicine, American University of Beirut, Beirut, Lebanon
| | - Remi Safi
- Dermatology, American University of Beirut, Beirut, Lebanon
| | - Athar Khalil
- Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
| | - Ossama Abbas
- Dermatology, American University of Beirut, Beirut, Lebanon
| | - Yutaka Shimomura
- Department of Dermatology, Yamaguchi University, Yamaguchi, Japan
| | - Mazen Kurban
- Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
- Dermatology, American University of Beirut, Beirut, Lebanon
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5
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Yamamoto EA, Nguyen JK, Liu J, Keller E, Campbell N, Zhang CJ, Smith HR, Li X, Jørgensen TN. Low Levels of Vitamin D Promote Memory B Cells in Lupus. Nutrients 2020; 12:E291. [PMID: 31978964 PMCID: PMC7070834 DOI: 10.3390/nu12020291] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/14/2020] [Accepted: 01/19/2020] [Indexed: 12/14/2022] Open
Abstract
Background: Vitamin D deficiency is a known risk factor for Systemic Lupus Erythematosus (SLE), yet clinical trials have not demonstrated efficacy and few studies have utilized lupus models to understand the mechanism underlying this relationship. The Act1-/- mouse is a spontaneous model of lupus and Sjögren's syndrome, characterized by increased Th17 cells and peripheral B cell expansion. Vitamin D3 has anti-inflammatory properties, reduces Th17 cells and impairs B cell differentiation/activation. Therefore, we assessed how varying amounts of vitamin D3 affected lupus-like disease in the Act1-/- mouse. Methods: Act1-/- mice were fed either low/restricted (0 IU/kg), normal (2 IU/kg), or high/supplemented (10 IU/kg) vitamin D3 chow for 9 weeks, after which lupus-like features were analyzed. Results: While we found no differences in Th17 cells between vitamin D3 groups, vitamin D3 restriction specifically promoted memory B cell development, accompanied by elevated levels of serum IgM, IgG1, IgG3, and anti-dsDNA IgG. A similar significant negative association between serum vitamin D and memory B cells was confirmed in a cohort of SLE patients. Conclusion: Low levels of vitamin D3 are associated with elevated levels of memory B cells in an animal model of lupus and well-controlled SLE patients.
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Affiliation(s)
- Erin A. Yamamoto
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA
- Lerner Research Institute, Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Jane K. Nguyen
- Robert J. Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Jessica Liu
- Lerner Research Institute, Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Emma Keller
- Lerner Research Institute, Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Nicole Campbell
- Lerner Research Institute, Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Cun-Jin Zhang
- Lerner Research Institute, Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Howard R. Smith
- Department of Rheumatologic and Immunologic Disease, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Xiaoxia Li
- Lerner Research Institute, Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Trine N Jørgensen
- Lerner Research Institute, Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
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Bufotalin ameliorates experimental Sjögren's syndrome development by inhibiting Th17 generation. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:1977-1985. [PMID: 31950221 DOI: 10.1007/s00210-020-01817-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/08/2020] [Indexed: 12/13/2022]
Abstract
Chronic inflammatory autoimmune disease Sjögren's syndrome (SS) is characterized by the reduced secretion of exocrine glands, suggesting strategies targeting inflammation to be a potential option for SS therapy. Bufotalin, an active constituent of Bufadienolides, exerts potent antitumor effects with unknown effects on autoimmune diseases including SS. This study aims to investigate whether bufotalin possesses therapeutic potentials to SS and the underlying mechanisms. The experimental Sjögren's syndrome (ESS) murine model was constructed by SG-immunization and murine naïve CD4+ T cells were cultured under Th17 polarization conditions with or without low doses of bufotalin treatment. Saliva flow rate was measured, and flow cytometry was applied to analyze T cell subpopulations. ELISA was conducted to determine the levels of targeted inflammatory cytokines. Bufotalin-treated ESS mice showed higher saliva flow rates, lower serum levels of autoantibodies (anti-M3R and anti-SSA IgG), lower serum levels of pro-inflammatory cytokines, as well as lower Th17 cell population from spleens and cervical lymph nodes. Additionally, in vitro study showed that bufotalin inhibits Th17 polarization and secretion of cytokines IL-17 and IFN-γ. Bufotalin at a low dose significantly ameliorates ESS development, possibly via inhibiting pro-inflammatory Th17 population and secretion of inflammatory cytokines during ESS pathogenesis.
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7
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Zhang CJ, Wang C, Jiang M, Gu C, Xiao J, Chen X, Martin BN, Tang F, Yamamoto E, Xian Y, Wang H, Li F, Sartor RB, Smith H, Husni ME, Shi FD, Gao J, Carman J, Dongre A, McKarns SC, Coppieters K, Jørgensen TN, Leonard WJ, Li X. Act1 is a negative regulator in T and B cells via direct inhibition of STAT3. Nat Commun 2018; 9:2745. [PMID: 30013031 PMCID: PMC6048100 DOI: 10.1038/s41467-018-04974-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 05/23/2018] [Indexed: 01/05/2023] Open
Abstract
Although Act1 (adaptor for IL-17 receptors) is necessary for IL-17-mediated inflammatory responses, Act1- (but not Il17ra-, Il17rc-, or Il17rb-) deficient mice develop spontaneous SLE- and Sjögren's-like diseases. Here, we show that Act1 functions as a negative regulator in T and B cells via direct inhibition of STAT3. Mass spectrometry analysis detected an Act1-STAT3 complex, deficiency of Act1 (but not Il17ra-, Il17rc-, or Il17rb) results in hyper IL-23- and IL-21-induced STAT3 activation in T and B cells, respectively. IL-23R deletion or blockade of IL-21 ameliorates SLE- and Sjögren's-like diseases in Act1-/- mice. Act1 deficiency results in hyperactivated follicular Th17 cells with elevated IL-21 expression, which promotes T-B cell interaction for B cell expansion and antibody production. Moreover, anti-IL-21 ameliorates the SLE- and Sjögren's-like diseases in Act1-deficient mice. Thus, IL-21 blocking antibody might be an effective therapy for treating SLE- and Sjögren's-like syndrome in patients containing Act1 mutation.
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MESH Headings
- Adaptor Proteins, Signal Transducing/deficiency
- Adaptor Proteins, Signal Transducing/genetics
- Adaptor Proteins, Signal Transducing/immunology
- Animals
- Antibodies, Monoclonal/pharmacology
- B-Lymphocytes/drug effects
- B-Lymphocytes/immunology
- B-Lymphocytes/pathology
- Cell Differentiation
- Disease Models, Animal
- Female
- Gene Expression Regulation
- Interleukin-17/genetics
- Interleukin-17/immunology
- Interleukins/antagonists & inhibitors
- Interleukins/genetics
- Interleukins/immunology
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/immunology
- Leukocytes, Mononuclear/pathology
- Lupus Erythematosus, Systemic/drug therapy
- Lupus Erythematosus, Systemic/genetics
- Lupus Erythematosus, Systemic/immunology
- Lupus Erythematosus, Systemic/pathology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Primary Cell Culture
- Receptors, Interleukin/deficiency
- Receptors, Interleukin/genetics
- Receptors, Interleukin/immunology
- Receptors, Interleukin-17/deficiency
- Receptors, Interleukin-17/genetics
- Receptors, Interleukin-17/immunology
- STAT3 Transcription Factor/genetics
- STAT3 Transcription Factor/immunology
- Signal Transduction
- Sjogren's Syndrome/drug therapy
- Sjogren's Syndrome/genetics
- Sjogren's Syndrome/immunology
- Sjogren's Syndrome/pathology
- Spleen
- T-Lymphocytes/drug effects
- T-Lymphocytes/immunology
- T-Lymphocytes/pathology
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Affiliation(s)
- Cun-Jin Zhang
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300051, China
- Center for Neuroinflammation, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, China
| | - Chenhui Wang
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Wuhan Institute of Biotechnology, Wuhan, 430200, China
| | - Meiling Jiang
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
- Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300192, China
| | - Chunfang Gu
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Jianxin Xiao
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Xing Chen
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Bradley N Martin
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Fangqiang Tang
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Erin Yamamoto
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Yibo Xian
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Han Wang
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Fengling Li
- National Gnotobiotic Rodent Resource Center, Department of Medicine and Center for Gastrointestinal Biology and Disease, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - R Balfour Sartor
- National Gnotobiotic Rodent Resource Center, Department of Medicine and Center for Gastrointestinal Biology and Disease, University of North Carolina, Chapel Hill, NC, 27599, USA
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Howard Smith
- Department of Rheumatologic and Immunologic Disease, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - M Elaine Husni
- Department of Rheumatologic and Immunologic Disease, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Fu-Dong Shi
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300051, China
- Center for Neuroinflammation, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, China
- Department of Neurology, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, 85013, USA
| | - Ji Gao
- Discovery Biology, Bristol-Myers Squibb, Princeton, NJ, 08540, USA
| | - Julie Carman
- Discovery Biology, Bristol-Myers Squibb, Princeton, NJ, 08540, USA
| | - Ashok Dongre
- Discovery Biology, Bristol-Myers Squibb, Princeton, NJ, 08540, USA
| | - Susan C McKarns
- Department of Surgery, University of Missouri School of Medicine, Columbia, MO, 65212, USA
- Department of Molecular Microbiology and Immunology, University of Missouri School of Medicine, Columbia, MO, 65212, USA
| | - Ken Coppieters
- Type 1 Diabetes Center, Novo Nordisk A/S, Søborg, 2860, Denmark
| | - Trine N Jørgensen
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA
| | - Warren J Leonard
- Laboratory of Molecular Immunology and the Immunology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Xiaoxia Li
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44106, USA.
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Keil A, Hall SR, Körner M, Herrmann M, Schmid RA, Frese S. Suppression of lupus nephritis and skin lesions in MRL/lpr mice by administration of the topoisomerase I inhibitor irinotecan. Arthritis Res Ther 2016; 18:243. [PMID: 27770825 PMCID: PMC5075215 DOI: 10.1186/s13075-016-1144-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 10/03/2016] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Since the precise mechanism for the pathogenesis of systemic lupus erythematosus (SLE) is unknown, no targeted therapies in addition to immunosuppression are available so far. We recently demonstrated that administration of the topoisomerase I (topo I) inhibitor irinotecan at extremely low concentrations reversed established lupus nephritis in NZB/NZW mice. While profound immunosuppression was absent, we proposed changes in DNA relaxation and anti-double-stranded (ds)DNA antibody binding as the underlying mechanism. To exclude that these effects were restricted to NZB/NZW mice, irinotecan was used in a genetically different strain of lupus-prone mice. METHODS MRL/lpr mice were treated with high- and low-dose irinotecan beginning at 8 weeks of age. Treatment was repeated every fourth week. In vitro, DNA was relaxed by recombinant topo I, and altered anti-dsDNA antibody binding was measured by enzyme-linked immunosorbent assay. RESULTS Administration of both high- and low-dose irinotecan prevented proteinuria and prolonged survival in MRL/lpr mice. Moreover, both concentrations of irinotecan significantly improved histopathology of the skin at 18 weeks of age. While only high-dose irinotecan diminished the numbers of plasmablasts and double-negative T cells, no changes in IgG-secreting cells or anti-dsDNA IgG were observed. In vitro, relaxation of DNA by topo I increased the binding of anti-dsDNA IgG but not the binding of anti-dsDNA IgM derived from the plasma of MRL/lpr mice. CONCLUSION The beneficial effects of topo I inhibition in a second, genetically different strain of lupus-prone mice strongly implicate irinotecan as a new therapeutic option for human SLE.
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Affiliation(s)
- Andreas Keil
- Department of Clinical Research and Division of General Thoracic Surgery, University Hospital Bern, Murtenstrasse 50, PO Box 44, , CH-3010, Bern, Switzerland
| | - Sean R Hall
- Department of Clinical Research and Division of General Thoracic Surgery, University Hospital Bern, Murtenstrasse 50, PO Box 44, , CH-3010, Bern, Switzerland
| | - Meike Körner
- Institute of Pathology, Länggasse, Bern, Switzerland
| | - Martin Herrmann
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Ralph A Schmid
- Department of Clinical Research and Division of General Thoracic Surgery, University Hospital Bern, Murtenstrasse 50, PO Box 44, , CH-3010, Bern, Switzerland
| | - Steffen Frese
- Department of Clinical Research and Division of General Thoracic Surgery, University Hospital Bern, Murtenstrasse 50, PO Box 44, , CH-3010, Bern, Switzerland.
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9
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Donate A, Voigt A, Nguyen CQ. The value of animal models to study immunopathology of primary human Sjögren's syndrome symptoms. Expert Rev Clin Immunol 2014; 10:469-81. [PMID: 24506531 PMCID: PMC5769146 DOI: 10.1586/1744666x.2014.883920] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Sjögren's syndrome (SjS) is a complex chronic autoimmune disease of multifactorial etiology that results in eventual loss of secretory function in the exocrine glands. The challenges towards finding a therapeutic prevention or treatment for SjS are due primarily to a lack of understanding in the pathophysiological and clinical progression of the disease. In order to circumnavigate this problem, there is a need for appropriate animal models that resemble the major phenotypes of human SjS and deliver a clear underlying biological or molecular mechanism capable of defining various aspects for the disease. Here, we present an overview of SjS mouse models that are providing insight into the autoimmune process of SjS and advance our focus on potential diagnostic and therapeutic targets.
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Affiliation(s)
- Amy Donate
- Department of Infectious Diseases and Pathology, University of Florida College of Veterinary Medicine, 2015 SW 16 Ave, Gainesville, Florida 32611, USA
| | - Alexandria Voigt
- Department of Infectious Diseases and Pathology, University of Florida College of Veterinary Medicine, 2015 SW 16 Ave, Gainesville, Florida 32611, USA
| | - Cuong Q. Nguyen
- Department of Infectious Diseases and Pathology, University of Florida College of Veterinary Medicine, 2015 SW 16 Ave, Gainesville, Florida 32611, USA
- Center for Orphan Autoimmune Disorders, University of Florida College of Dentistry, 1600 SW Archer Rd, Gainesville, Florida 32610, USA
- Department of Oral Biology, University of Florida College of Dentistry, 1600 SW Archer Rd, Gainesville, Florida 32610, USA
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10
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Giltiay NV, Lu Y, Cullen JL, Jørgensen TN, Shlomchik MJ, Li X. Spontaneous loss of tolerance of autoreactive B cells in Act1-deficient rheumatoid factor transgenic mice. THE JOURNAL OF IMMUNOLOGY 2013; 191:2155-63. [PMID: 23904159 DOI: 10.4049/jimmunol.1300152] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Self-reactive B cells in BALB/c AM14 transgenic (Tg) rheumatoid factor mice are not subject to central or peripheral tolerization. Instead, they remain at a stage of "clonal ignorance"; that is, they do not proliferate and differentiate into Ab-forming cells. However, the immunoregulatory mechanisms that prevent autoantibody production in these mice remain unclear. In this study, we show that crossing AM14 Tg mice to a mouse strain deficient in Act1, a molecule involved in the regulation of BAFF-R and CD40-signaling in B cells, results in spontaneous activation of AM14 Tg B cells and production of AM14-specific Abs. Three- to 5-mo-old AM14 Tg Act1(-/-) mice showed significant expansion of AM14 Tg B cells, including a 2- to 3-fold increase in the spleen and cervical lymph nodes compared with AM14 Tg Act1(+/+) mice. Furthermore, in the presence of endogenous self-Ag (IgH(a) congenic background), AM14 Tg Act1(-/-) B cells were spontaneously activated and differentiated into Ab-forming cells. In contrast with previous studies using AM14 Tg MLR.Fas(lpr) mice, we found that a significant number of AM14 Tg cells AM14 Tg Act1(-/-) mice displayed phenotypic characteristics of germinal center B cells. Anti-CD40L treatment significantly limited the expansion and activation of AM14 Tg Act1(-/-) B cells, suggesting that CD40L-mediated signals are required for the retention of these cells. Our results support the important role of Act1 in the regulation of self-reactive B cells and reveal how Act1 functions to prevent the production of autoantibodies.
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Affiliation(s)
- Natalia V Giltiay
- Department of Immunology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
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