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Gao L, He C, Yang A, Zhou H, Lu Q, Birge RB, Wu Y. Receptor tyrosine kinases Tyro3, Axl, and Mertk differentially contribute to antibody-induced arthritis. Cell Commun Signal 2023; 21:195. [PMID: 37537628 PMCID: PMC10398921 DOI: 10.1186/s12964-023-01133-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 04/20/2023] [Indexed: 08/05/2023] Open
Abstract
Tyro3, Axl, and Mertk (abbreviated TAMs) comprise a family of homologous type 1 receptor tyrosine kinases (RTKs) that have been implicated as inhibitory receptors that dampen inflammation, but their roles in the pathogenesis of rheumatoid arthritis remains understudied. Here, to investigate TAMs in an inflammatory arthritis model, antibody-induced arthritis in single TAM-deficient mice (Tyro3- KO, Axl-KO, Mertk-KO) was induced by K/BxN serum injection. Subsequently, joint inflammation and cytokine levels, as well as the expression of Fcγ Rs and complement receptors were assessed in WT and TAM-deficient mice. Compared with littermate control mice, Axl-/- and Mertk-/- mice developed more severe antibody-induced arthritis, while in contrast, Tyro3-/- mice showed diminished joint inflammation. Concomitantly, the levels of cytokines in joints of Axl-/- and Mertk-/- mice were also significantly increased, while cytokines in the Tyro3-/- joint tissues were decreased. At the molecular and cellular level, TAMs showed distinct expression patterns, whereby monocytes expressed Axl and Mertk, but no Tyro3, while neutrophils expressed Axl and Tyro3 but little Mertk. Moreover, expression of Fcγ receptors and C5aR showed different patterns with TAMs expression, whereby FcγRIV was higher in monocytes of Axl-/- and Mertk-/- mice compared to wild-type mice, while Tyro3-/- neutrophils showed lower expression levels of FcγRI, FcγRIII and FcγRIV. Finally, expression of C5aR was increased in Mertk-/- monocytes, and was decreased in Tyro3-/- neutrophils. These data indicate that Axl, Mertk and Tyro3 have distinct functions in antibody-induced arthritis, due in part to the differential regulation of cytokines production, as well as expression of FcγRs and C5aR. Video Abstract.
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Affiliation(s)
- Liang Gao
- Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, National Clinical Research Center for Hematologic Diseases, Cyrus Tang Medical Institute, Soochow University, Suzhou, 215123, China
| | - Chao He
- Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, National Clinical Research Center for Hematologic Diseases, Cyrus Tang Medical Institute, Soochow University, Suzhou, 215123, China
| | - Aizhen Yang
- Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, National Clinical Research Center for Hematologic Diseases, Cyrus Tang Medical Institute, Soochow University, Suzhou, 215123, China.
| | - Haibin Zhou
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, 215123, China
| | - Qingxian Lu
- Department of Ophthalmology and Visual Sciences, University of Louisville, Louisville, KY, 40202, USA
| | - Raymond B Birge
- Department of Microbiology, Biochemistry and Molecular Genetics, New Jersey Medical School Cancer Center, Rutgers University, Newark, NJ, USA.
| | - Yi Wu
- Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, National Clinical Research Center for Hematologic Diseases, Cyrus Tang Medical Institute, Soochow University, Suzhou, 215123, China.
- Sol Sherry Thrombosis Research Center, Temple University School of Medicine, Philadelphia, PA, USA.
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Johnson TM, Mahabir CA, Yang Y, Roul P, Goldsweig AM, Binstadt BA, Baker JF, Sauer BC, Cannon GW, Mikuls TR, England BR. Aortic Stenosis Risk in Rheumatoid Arthritis. JAMA Intern Med 2023; 183:2807944. [PMID: 37523173 PMCID: PMC10391353 DOI: 10.1001/jamainternmed.2023.3087] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 05/20/2023] [Indexed: 08/01/2023]
Abstract
Importance Although an increased risk of ischemic cardiovascular disease has been associated with rheumatoid arthritis (RA), the risk of aortic stenosis (AS) is unknown. Objective To examine the risk of incident AS, aortic valve intervention, AS-related death, and risk factors for AS development in patients with RA. Design, Setting, and Participants This cohort study linked data from the Veterans Health Administration (VHA) and Centers for Medicare & Medicaid Services from 2000 to 2019. Patients with RA were matched by age, sex, and VHA enrollment year with up to 10 patients without RA. The cohort was followed until incident AS, aortic valve intervention, or death. Data were analyzed from August 23, 2022, to March 3, 2023. Exposures the primary exposure was the presence of RA, defined using validated RA algorithms. Main Outcomes and Measures Aortic stenosis was defined as a composite of inpatient or outpatient diagnoses, surgical or transcatheter aortic valve replacement, or AS-related death using diagnostic and procedural codes. Risk of AS development was assessed with multivariable Cox proportional hazards models adjusted for race, ethnicity, smoking status, body mass index, rurality, comorbidities, and health care use. Results The cohort included 73 070 patients with RA (64 008 [87.6%] males; mean [SD] age, 63.0 [11.9] years) matched with 639 268 patients without RA (554 182 [86.7%] males; mean [SD] age, 61.9 [11.7] years) and 16 109 composite AS outcomes that occurred over 6 223 150 person-years. The AS incidence rate was 3.97 (95% CI, 3.81-4.13) per 1000 person-years in patients with RA and 2.45 (95% CI, 2.41-2.49) per 1000 person-years in the control patients (absolute difference, 1.52 per 1000 person-years). Rheumatoid arthritis was associated with an increased risk of composite AS (adjusted hazard ratio [AHR], 1.48; 95% CI, 1.41-1.55), aortic valve intervention (AHR, 1.34; 95% CI, 1.22-1.48), and AS-related death (AHR, 1.26; 95% CI, 1.04-1.54). Conclusions and Relevance In this cohort study, RA was associated with a higher risk of developing AS and the subsequent risks of undergoing aortic valve intervention and suffering from AS-related death. Future studies are needed to confirm whether valvular heart disease, specifically AS, may be an overlooked cardiovascular disease complication in RA.
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Affiliation(s)
- Tate M. Johnson
- Medicine & Research Service, VA Nebraska-Western Iowa Health Care System, Omaha
- Division of Rheumatology & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha
| | - Chetaj A. Mahabir
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Nebraska Medical Center, Omaha
| | - Yangyuna Yang
- Division of Rheumatology & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha
| | - Punyasha Roul
- Division of Rheumatology & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha
| | - Andrew M. Goldsweig
- Department of Cardiology, Baystate Medical Center, Springfield, Massachusetts
| | - Bryce A. Binstadt
- Division of Pediatric Rheumatology, Allergy, and Immunology, University of Minnesota, Minneapolis
| | - Joshua F. Baker
- Corporal Michael J. Crescenz VA Medical Center, Philadelphia, Pennsylvania
- Division of Rheumatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia
| | - Brian C. Sauer
- Division of Rheumatology, Salt Lake City VA Medical Center, Salt Lake City, Utah
- Division of Rheumatology, University of Utah School of Medicine, Salt Lake City
| | - Grant W. Cannon
- Division of Rheumatology, Salt Lake City VA Medical Center, Salt Lake City, Utah
- Division of Rheumatology, University of Utah School of Medicine, Salt Lake City
| | - Ted R. Mikuls
- Medicine & Research Service, VA Nebraska-Western Iowa Health Care System, Omaha
- Division of Rheumatology & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha
| | - Bryant R. England
- Medicine & Research Service, VA Nebraska-Western Iowa Health Care System, Omaha
- Division of Rheumatology & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha
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Faragher JL, Auger JL, Osinski V, Meier LA, Engelson BJ, Firulyova MM, Gonzalez-Torres MI, Brombacher F, Zaitsev K, Marath A, Binstadt BA. Autoimmune Valvular Carditis Requires Endothelial Cell TNFR1 Expression. Arterioscler Thromb Vasc Biol 2023; 43:943-957. [PMID: 37021574 PMCID: PMC10213135 DOI: 10.1161/atvbaha.122.319025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/21/2023] [Indexed: 04/07/2023]
Abstract
BACKGROUND Inflammation is a key driver of cardiovascular pathology, and many systemic autoimmune/rheumatic diseases are accompanied by increased cardiac risk. In the K/B.g7 mouse model of coexisting systemic autoantibody-mediated arthritis and valvular carditis, valve inflammation depends on macrophage production of TNF (tumor necrosis factor) and IL-6 (interleukin-6). Here, we sought to determine if other canonical inflammatory pathways participate and to determine whether TNF signaling through TNFR1 (tumor necrosis factor receptor 1) on endothelial cells is required for valvular carditis. METHODS We first asked if type 1, 2, or 3 inflammatory cytokine systems (typified by IFNγ, IL-4, and IL-17, respectively) were critical for valvular carditis in K/B.g7 mice, using a combination of in vivo monoclonal antibody blockade and targeted genetic ablation studies. To define the key cellular targets of TNF, we conditionally deleted its main proinflammatory receptor, TNFR1, in endothelial cells. We analyzed how the absence of endothelial cell TNFR1 affected valve inflammation, lymphangiogenesis, and the expression of proinflammatory genes and molecules. RESULTS We found that typical type 1, 2, and 3 inflammatory cytokine systems were not required for valvular carditis, apart from a known initial requirement of IL-4 for autoantibody production. Despite expression of TNFR1 on a wide variety of cell types in the cardiac valve, deleting TNFR1 specifically on endothelial cells protected K/B.g7 mice from valvular carditis. This protection was accompanied by reduced expression of VCAM-1 (vascular cell adhesion molecule), fewer valve-infiltrating macrophages, reduced pathogenic lymphangiogenesis, and diminished proinflammatory gene expression. CONCLUSIONS TNF and IL-6 are the main cytokines driving valvular carditis in K/B.g7 mice. The interaction of TNF with TNFR1 specifically on endothelial cells promotes cardiovascular pathology in the setting of systemic autoimmune/rheumatic disease, suggesting that therapeutic targeting of the TNF:TNFR1 interaction could be beneficial in this clinical context.
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Affiliation(s)
- Jessica L. Faragher
- Center for Immunology, University of Minnesota, Minneapolis, MN
- Department of Pediatrics, University of Minnesota, Minneapolis, MN
- University of Minnesota, Minneapolis, MN
| | - Jennifer L Auger
- Center for Immunology, University of Minnesota, Minneapolis, MN
- Department of Pediatrics, University of Minnesota, Minneapolis, MN
- University of Minnesota, Minneapolis, MN
| | - Victoria Osinski
- Center for Immunology, University of Minnesota, Minneapolis, MN
- Department of Pediatrics, University of Minnesota, Minneapolis, MN
- University of Minnesota, Minneapolis, MN
| | - Lee A Meier
- Center for Immunology, University of Minnesota, Minneapolis, MN
- Department of Pediatrics, University of Minnesota, Minneapolis, MN
- University of Minnesota, Minneapolis, MN
- Department of Surgery, University of Colorado, Aurora, CO
| | - Brianna J Engelson
- Center for Immunology, University of Minnesota, Minneapolis, MN
- University of Minnesota, Minneapolis, MN
| | - Maria M. Firulyova
- Almazov National Medical Research Centre, Saint-Petersburg, Russia
- Computer Technologies Laboratory, ITMO University, Saint Petersburg, Russia
| | | | - Frank Brombacher
- International Centre for Genetic Engineering and Biotechnology, Cape Town, South Africa
| | - Konstantin Zaitsev
- Computer Technologies Laboratory, ITMO University, Saint Petersburg, Russia
| | | | - Bryce A Binstadt
- Center for Immunology, University of Minnesota, Minneapolis, MN
- Department of Pediatrics, University of Minnesota, Minneapolis, MN
- University of Minnesota, Minneapolis, MN
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Qiu A, Miller A, Zotti FD, Santhanakrishnan M, Hendrickson JE, Tredicine M, Stowell SR, Luckey CJ, Zimring JC, Hudson KE. FcγRIV is required for IgG2c mediated enhancement of RBC alloimmunization. Front Immunol 2022; 13:972723. [PMID: 36189253 PMCID: PMC9519184 DOI: 10.3389/fimmu.2022.972723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 08/18/2022] [Indexed: 11/13/2022] Open
Abstract
Passive immunization with anti-D can prevent maternal alloimmunization to RhD thereby preventing hemolytic disease of the fetus and newborn. Unexpectedly, anti-D fails in some cases and some monoclonal anti-D preparations paradoxically enhances alloimmunization. The underlying mechanisms modulating humoral alloimmunization by anti-D are unknown. We previously reported that IgG antibody subclasses differentially regulate alloimmunity in response to red blood cell (RBC) transfusions in a mouse model; in particular, IgG2c significantly enhanced RBC alloantibody responses. Initial mechanistic studies revealed that IgG2c:RBC immune complexes were preferentially consumed by the splenic dendritic cell (DC) subsets that play a role in RBC alloimmunization. The deletion of activating Fc-gamma receptors (FcγRs) (i.e., FcγRI, FcγRIII, and FcγRIV) on DCs abrogated IgG2c-mediated enhanced alloimmunization. Because DCs express high levels of FcγRIV, which has high affinity for the IgG2c subclass, we hypothesized that FcγRIV was required for enhanced alloimmunization. To test this hypothesis, knockout mice and blocking antibodies were used to manipulate FcγR expression. The data presented herein demonstrate that FcγRIV, but not FcγRI or FcγRIII, is required for IgG2c-mediated enhancement of RBC alloantibody production. Additionally, FcγRI is alone sufficient for IgG2c-mediated RBC clearance but not for increased alloimmunization, demonstrating that RBC clearance can occur without inducing alloimmunization. Together, these data, combined with prior observations, support the hypothesis that passive immunization with an RBC-specific IgG2c antibody increases RBC alloantibody production through FcγRIV ligation on splenic conventional DCs (cDCs). This raises the question of whether standardizing antibody subclasses in immunoprophylaxis preparations is desirable and suggests which subclasses may be optimal for generating monoclonal anti-D therapeutics.
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Affiliation(s)
- Annie Qiu
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY, United States
| | - Anabel Miller
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY, United States
| | - Flavia Dei Zotti
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY, United States
| | - Manjula Santhanakrishnan
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT, United States
| | - Jeanne E. Hendrickson
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT, United States
| | - Maria Tredicine
- Department of Translational Medicine and Surgery, Section of General Pathology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Sean R. Stowell
- Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
| | - Chance John Luckey
- Department of Pathology, University of Virginia, Charlottesville, VA, United States
| | - James C. Zimring
- Carter Immunology Center, University of Virginia, Charlottesville, VA, United States
- Department of Pathology, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Krystalyn E. Hudson
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY, United States
- *Correspondence: Krystalyn E. Hudson,
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Meier LA, Faragher JL, Osinski V, Auger JL, Voeller R, Marath A, Binstadt BA. CD47 Promotes Autoimmune Valvular Carditis by Impairing Macrophage Efferocytosis and Enhancing Cytokine Production. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:2643-2651. [PMID: 35867674 PMCID: PMC9309982 DOI: 10.4049/jimmunol.2100903] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 04/03/2022] [Indexed: 06/15/2023]
Abstract
Systemic autoantibody-mediated diseases accelerate chronic cardiovascular disease in humans. In the K/B.g7 mouse model of spontaneous autoantibody-mediated inflammatory arthritis, valvular carditis arises in part because of Fc receptor-mediated activation of macrophages, leading to production of pathogenic TNF and IL-6. In this study, we explored whether impaired efferocytosis mediated by the interaction of CD47-expressing apoptotic cells with signal regulatory protein α (SIRPα) on macrophages contributes to disease progression in this model. CD47-expressing apoptotic cells and SIRPα+ macrophages were abundant in inflamed/rheumatic cardiac valves from both mice and humans. In vivo anti-CD47 blockade both prevented and treated valvular carditis in K/B.g7 mice. Blocking CD47 enhanced macrophage efferocytosis and reduced macrophage production of TNF and IL-6. These studies highlight the CD47:SIRPα interaction as a key driver of chronic cardiac valve inflammation and suggest these molecules as potential therapeutic targets to reduce cardiovascular disease risk in autoantibody-driven inflammatory diseases.
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Affiliation(s)
- Lee A Meier
- Center for Immunology, University of Minnesota Medical School, Minneapolis, MN
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN
| | - Jessica L Faragher
- Center for Immunology, University of Minnesota Medical School, Minneapolis, MN
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN
| | - Victoria Osinski
- Center for Immunology, University of Minnesota Medical School, Minneapolis, MN
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN
| | - Jennifer L Auger
- Center for Immunology, University of Minnesota Medical School, Minneapolis, MN
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN
| | - Rochus Voeller
- Department of Surgery, University of Minnesota Medical School, Minneapolis, MN; and
| | | | - Bryce A Binstadt
- Center for Immunology, University of Minnesota Medical School, Minneapolis, MN;
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN
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There Is Strength in Numbers: Quantitation of Fc Gamma Receptors on Murine Tissue-Resident Macrophages. Int J Mol Sci 2021; 22:ijms222212172. [PMID: 34830050 PMCID: PMC8620503 DOI: 10.3390/ijms222212172] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/29/2021] [Accepted: 11/03/2021] [Indexed: 11/17/2022] Open
Abstract
Many of the effector functions of antibodies rely on the binding of antibodies/immune complexes to cellular Fcγ receptors (FcγRs). Since the majority of innate immune effector cells express both activating and inhibitory Fc receptors, the outcome of the binding of immune complexes to cells of a given population is influenced by the relative affinities of the respective IgG subclasses to these receptors, as well as by the numbers of activating and inhibitory FcγRs on the cell surface. A group of immune cells that has come into focus more recently is the various subsets of tissue-resident macrophages. The central functions of FcγRs on tissue macrophages include the clearance of opsonized pathogens, the removal of small immune complexes from the circulation and the depletion of antibody-opsonized cells in the therapy of autoimmunity and cancer. Despite these essential functions of FcγRs on tissue-resident macrophages, an in-depth quantification of FcγRs is lacking. Thus, the aim of our current study was to quantify the various Fcγ receptors on macrophages in murine liver, lung, kidney, brain, skin and spleen. Our study identified a pronounced heterogeneity between FcγR expression patterns of the different tissue macrophages, which may reflect their specialized functions within their unique niches in different organ environments.
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Huseby Kelcher AM, Baehr CA, Hamid FA, Hart GT, Pravetoni M. Contribution of Antibody-Mediated Effector Functions to the Mechanism of Efficacy of Vaccines for Opioid Use Disorders. THE JOURNAL OF IMMUNOLOGY 2021; 207:860-867. [PMID: 34281999 DOI: 10.4049/jimmunol.2100204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 05/28/2021] [Indexed: 12/28/2022]
Abstract
Vaccines and mAbs offer promising strategies to treat substance use disorders (SUDs) and prevent overdose. Despite vaccines and mAbs against SUDs demonstrating proof of efficacy, selectivity, and safety in animal models, it is unknown whether the mechanism of action of these immunotherapeutics relies exclusively on the formation of Ab/drug complexes, or also involves Ab-mediated effector functions. Hence, this study tested whether the efficacy of active and passive immunization against drugs of abuse requires phagocytosis, the intact Fc portion of the anti-drug Ab, FcγRs, or the neonatal FcR (FcRn). The efficacy of a lead vaccine against oxycodone was not diminished in mice after depletion of macrophages or granulocytes. Anti-oxycodone F(ab')2 fragments resulted in lower serum levels of F(ab')2 compared with intact mAbs, and F(ab')2s were not as effective as the parent mAbs in reducing distribution of oxycodone to the brain. The efficacy of vaccines and mAbs against oxycodone was preserved in either FcγIII or FcγI-IV ablated mice, suggesting that FcγRs are not required for Ab efficacy. Finally, both active and passive immunization against oxycodone in FcRn-/- mice yielded reduced efficacy compared with wild-type control mice. These data identified a role for FcRn, but not for phagocytosis or Fc-dependent effector functions, in mediating the efficacy of vaccines and mAbs against SUD. This study supports rational design of vaccines and mAbs engineered for maximal neutralization activity and optimal FcRn binding.
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Affiliation(s)
| | - Carly A Baehr
- Department of Pharmacology, University of Minnesota Medical School, Minneapolis, MN
| | - Fatima A Hamid
- Department of Pharmacology, University of Minnesota Medical School, Minneapolis, MN
| | - Geoffrey T Hart
- Division of Infectious Diseases and International Medicine, Department of Medicine, University of Minnesota Medical School, Minneapolis, MN; and.,Center for Immunology, University of Minnesota Medical School, Minneapolis, MN
| | - Marco Pravetoni
- Department of Pharmacology, University of Minnesota Medical School, Minneapolis, MN; .,Center for Immunology, University of Minnesota Medical School, Minneapolis, MN
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Sanghera C, Wong LM, Panahi M, Sintou A, Hasham M, Sattler S. Cardiac phenotype in mouse models of systemic autoimmunity. Dis Model Mech 2019; 12:dmm036947. [PMID: 30858306 PMCID: PMC6451423 DOI: 10.1242/dmm.036947] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Patients suffering from systemic autoimmune diseases are at significant risk of cardiovascular complications. This can be due to systemically increased levels of inflammation leading to accelerated atherosclerosis, or due to direct damage to the tissues and cells of the heart. Cardiac complications include an increased risk of myocardial infarction, myocarditis and dilated cardiomyopathy, valve disease, endothelial dysfunction, excessive fibrosis, and bona fide autoimmune-mediated tissue damage by autoantibodies or auto-reactive cells. There is, however, still a considerable need to better understand how to diagnose and treat cardiac complications in autoimmune patients. A range of inducible and spontaneous mouse models of systemic autoimmune diseases is available for mechanistic and therapeutic studies. For this Review, we systematically collated information on the cardiac phenotype in the most common inducible, spontaneous and engineered mouse models of systemic lupus erythematosus, rheumatoid arthritis and systemic sclerosis. We also highlight selected lesser-known models of interest to provide researchers with a decision framework to choose the most suitable model for their study of heart involvement in systemic autoimmunity.
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Affiliation(s)
- Chandan Sanghera
- National Heart and Lung Institute, Imperial College London, London, W12 0NN, UK
| | - Lok Man Wong
- National Heart and Lung Institute, Imperial College London, London, W12 0NN, UK
| | - Mona Panahi
- National Heart and Lung Institute, Imperial College London, London, W12 0NN, UK
| | - Amalia Sintou
- National Heart and Lung Institute, Imperial College London, London, W12 0NN, UK
| | - Muneer Hasham
- The Jackson Laboratory, 600 Main Street, Bar Harbor, ME 04609, USA
| | - Susanne Sattler
- National Heart and Lung Institute, Imperial College London, London, W12 0NN, UK
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Németh T, Futosi K, Szabó M, Aradi P, Saito T, Mócsai A, Jakus Z. Importance of Fc Receptor γ-Chain ITAM Tyrosines in Neutrophil Activation and in vivo Autoimmune Arthritis. Front Immunol 2019; 10:252. [PMID: 30858848 PMCID: PMC6397848 DOI: 10.3389/fimmu.2019.00252] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 01/29/2019] [Indexed: 01/02/2023] Open
Abstract
Activating Fcγ receptors associated with Fc receptor γ-chain (FcRγ) are critical for mediating neutrophil effector functions in immune complex-mediated autoimmune diseases. FcRγ contains ITAM tyrosines and the in vivo role of these tyrosines has not been defined in neutrophils and arthritis. In this study, the in vivo functions of FcRγ ITAM tyrosines were characterized using wild type and ITAM tyrosine mutant (Y65F/Y76F) transgenic mice crossed to an FcRγ-deficient genetic background. FcRγ-deficient neutrophils showed undetectable cell surface expression of the activating Fcγ receptor IV, defective immune complex-induced superoxide production, degranulation and spreading. Although the re-expression of both the wild type and the ITAM tyrosine mutant (Y65F/Y76F) FcRγ could restore activating Fcγ receptor expression of FcRγ-deficient neutrophils, only the wild type transgenic form could mediate Fcγ receptor-dependent effector functions. In contrast, neutrophils carrying ITAM tyrosine mutant FcRγ were unable to produce superoxide, mediate degranulation and perform active spreading. In addition, our results confirmed the protection of FcRγ-deficient mice from autoimmune arthritis. Importantly, the presence of the wild type FcRγ transgene, in contrast to the ITAM tyrosine mutant transgene, partially reversed autoimmune arthritis development. The reversing effect of the wild type transgene was even more robust when animals carried the wild type transgene in a homozygous form. Collectively, FcRγ ITAM tyrosines play a critical role in the induction of neutrophil effector responses, the initiation and progression of an autoantibody-induced experimental arthritis in vivo, indicating a signaling, rather than just a receptor stabilizing function of the molecule.
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Affiliation(s)
- Tamás Németh
- Department of Physiology, Semmelweis University School of Medicine, Budapest, Hungary
| | - Krisztina Futosi
- Department of Physiology, Semmelweis University School of Medicine, Budapest, Hungary
| | - Marcell Szabó
- Department of Physiology, Semmelweis University School of Medicine, Budapest, Hungary
| | - Petra Aradi
- Department of Physiology, Semmelweis University School of Medicine, Budapest, Hungary.,MTA-SE "Lendület" Lymphatic Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, Budapest, Hungary
| | - Takashi Saito
- Laboratory for Cell Signaling, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Attila Mócsai
- Department of Physiology, Semmelweis University School of Medicine, Budapest, Hungary
| | - Zoltán Jakus
- Department of Physiology, Semmelweis University School of Medicine, Budapest, Hungary.,MTA-SE "Lendület" Lymphatic Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, Budapest, Hungary
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10
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Meier LA, Auger JL, Engelson BJ, Cowan HM, Breed ER, Gonzalez-Torres MI, Boyer JD, Verma M, Marath A, Binstadt BA. CD301b/MGL2 + Mononuclear Phagocytes Orchestrate Autoimmune Cardiac Valve Inflammation and Fibrosis. Circulation 2018; 137:2478-2493. [PMID: 29386201 PMCID: PMC5988921 DOI: 10.1161/circulationaha.117.033144] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 01/08/2018] [Indexed: 11/16/2022]
Abstract
BACKGROUND Valvular heart disease is common and affects the mitral valve (MV) most frequently. Despite the prevalence of MV disease (MVD), the cellular and molecular pathways that initiate and perpetuate it are not well understood. METHODS K/B.g7 T-cell receptor transgenic mice spontaneously develop systemic autoantibody-associated autoimmunity, leading to fully penetrant fibroinflammatory MVD and arthritis. We used multiparameter flow cytometry, intracellular cytokine staining, and immunofluorescent staining to characterize the cells in inflamed K/B.g7 MVs. We used genetic approaches to study the contribution of mononuclear phagocytes (MNPs) to MVD in this model. Specifically, we generated K/B.g7 mice in which either CX3CR1 or CD301b/macrophage galactose N-acetylgalactosamine-specific lectin 2 (MGL2)-expressing MNPs were ablated. Using K/B.g7 mice expressing Cx3Cr1-Cre, we conditionally deleted critical inflammatory molecules from MNPs, including the Fc-receptor signal-transducing tyrosine kinase Syk and the cell adhesion molecule very late antigen-4. We performed complementary studies using monoclonal antibodies to block key inflammatory molecules. We generated bone marrow chimeric mice to define the origin of the inflammatory cells present in the MV and to determine which valve cells respond to the proinflammatory cytokine tumor necrosis factor (TNF). Finally, we examined specimens from patients with rheumatic heart disease to correlate our findings to human pathology. RESULTS MNPs comprised the vast majority of MV-infiltrating cells; these MNPs expressed CX3CR1 and CD301b/MGL2. Analogous cells were present in human rheumatic heart disease valves. K/B.g7 mice lacking CX3CR1 or in which CD301b/MGL2-expressing MNPs were ablated were protected from MVD. The valve-infiltrating CD301b/MGL2+ MNPs expressed tissue-reparative molecules including arginase-1 and resistin-like molecule α. These MNPs also expressed the proinflammatory cytokines TNF and interleukin-6, and antibody blockade of these cytokines prevented MVD. Deleting Syk from CX3CR1-expressing MNPs reduced their TNF and interleukin-6 production and also prevented MVD. TNF acted through TNF receptor-1 expressed on valve-resident cells to increase the expression of vascular cell adhesion molecule-1. Conditionally deleting the vascular cell adhesion molecule-1 ligand very late antigen-4 from CX3CR1-expressing MNPs prevented MVD. CONCLUSIONS CD301b/MGL2+ MNPs are key drivers of autoimmune MVD in K/B.g7 mice and are also present in human rheumatic heart disease. We define key inflammatory molecules that drive MVD in this model, including Syk, TNF, interleukin-6, very late antigen-4, and vascular cell adhesion molecule-1.
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Affiliation(s)
- Lee A Meier
- Center for Immunology (L.A.M., J.L.A., B.J.E., H.M.C., M.I.G.-T., B.A.B.)
- Department of Pediatrics (L.A.M., J.L.A., M.I.G.-T., B.A.B.)
- University of Minnesota Medical School (L.A.M., B.J.E., E.R.B., M.I.G.-T., M.V., B.A.B.), Minneapolis
| | - Jennifer L Auger
- Center for Immunology (L.A.M., J.L.A., B.J.E., H.M.C., M.I.G.-T., B.A.B.)
- Department of Pediatrics (L.A.M., J.L.A., M.I.G.-T., B.A.B.)
| | - Brianna J Engelson
- Center for Immunology (L.A.M., J.L.A., B.J.E., H.M.C., M.I.G.-T., B.A.B.)
- University of Minnesota Medical School (L.A.M., B.J.E., E.R.B., M.I.G.-T., M.V., B.A.B.), Minneapolis
| | - Hannah M Cowan
- Center for Immunology (L.A.M., J.L.A., B.J.E., H.M.C., M.I.G.-T., B.A.B.)
| | - Elise R Breed
- Department of Laboratory Medicine and Pathology (E.R.B.)
- University of Minnesota Medical School (L.A.M., B.J.E., E.R.B., M.I.G.-T., M.V., B.A.B.), Minneapolis
| | - Mayra I Gonzalez-Torres
- Center for Immunology (L.A.M., J.L.A., B.J.E., H.M.C., M.I.G.-T., B.A.B.)
- Department of Pediatrics (L.A.M., J.L.A., M.I.G.-T., B.A.B.)
- University of Minnesota Medical School (L.A.M., B.J.E., E.R.B., M.I.G.-T., M.V., B.A.B.), Minneapolis
| | - Joshua D Boyer
- Department of Medicine, University of California, San Diego (J.D.B.)
| | - Mayank Verma
- Department of Integrative Biology and Physiology (M.V.)
- University of Minnesota Medical School (L.A.M., B.J.E., E.R.B., M.I.G.-T., M.V., B.A.B.), Minneapolis
| | | | - Bryce A Binstadt
- Center for Immunology (L.A.M., J.L.A., B.J.E., H.M.C., M.I.G.-T., B.A.B.)
- Department of Pediatrics (L.A.M., J.L.A., M.I.G.-T., B.A.B.)
- University of Minnesota Medical School (L.A.M., B.J.E., E.R.B., M.I.G.-T., M.V., B.A.B.), Minneapolis
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11
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Di Ceglie I, Ascone G, Cremers NAJ, Sloetjes AW, Walgreen B, Vogl T, Roth J, Verbeek JS, van de Loo FAJ, Koenders MI, van der Kraan PM, Blom AB, van den Bosch MHJ, van Lent PLEM. Fcγ receptor-mediated influx of S100A8/A9-producing neutrophils as inducer of bone erosion during antigen-induced arthritis. Arthritis Res Ther 2018; 20:80. [PMID: 29720243 PMCID: PMC5932875 DOI: 10.1186/s13075-018-1584-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 03/28/2018] [Indexed: 01/01/2023] Open
Abstract
Background Osteoclast-mediated bone erosion is a central feature of rheumatoid arthritis (RA). Immune complexes, present in a large percentage of patients, bind to Fcγ receptors (FcγRs), thereby modulating the activity of immune cells. In this study, we investigated the contribution of FcγRs, and FcγRIV in particular, during antigen-induced arthritis (AIA). Methods AIA was induced in knee joints of wild-type (WT), FcγRI,II,III−/−, and FcγRI,II,III,IV−/− mice. Bone destruction, numbers of tartrate-resistant acid phosphatase-positive (TRAP+) osteoclasts, and inflammation were evaluated using histology; expression of the macrophage marker F4/80, neutrophil marker NIMPR14, and alarmin S100A8 was evaluated using immunohistochemistry. The percentage of osteoclast precursors in the bone marrow was determined using flow cytometry. In vitro osteoclastogenesis was evaluated with TRAP staining, and gene expression was assessed using real-time PCR. Results FcγRI,II,III,IV−/− mice showed decreased bone erosion compared with WT mice during AIA, whereas both the humoral and cellular immune responses against methylated bovine serum albumin were not impaired in FcγRI,II,III,IV−/− mice. The percentage of osteoclast precursors in the bone marrow of arthritic mice and their ability to differentiate into osteoclasts in vitro were comparable between FcγRI,II,III,IV−/− and WT mice. In line with these observations, numbers of TRAP+ osteoclasts on the bone surface during AIA were comparable between the two groups. Inflammation, a process that strongly activates osteoclast activity, was reduced in FcγRI,II,III,IV−/− mice, and of note, mainly decreased numbers of neutrophils were present in the joint. In contrast to FcγRI,II,III,IV−/− mice, AIA induction in knee joints of FcγRI,II,III−/− mice resulted in increased bone erosion, inflammation, and numbers of neutrophils, suggesting a crucial role for FcγRIV in the joint pathology by the recruitment of neutrophils. Finally, significant correlations were found between bone erosion and the number of neutrophils present in the joint as well as between bone erosion and the number of S100A8-positive cells, with S100A8 being an alarmin strongly produced by neutrophils that stimulates osteoclast resorbing activity. Conclusions FcγRs play a crucial role in the development of bone erosion during AIA by inducing inflammation. In particular, FcγRIV mediates bone erosion in AIA by inducing the influx of S100A8/A9-producing neutrophils into the arthritic joint. Electronic supplementary material The online version of this article (10.1186/s13075-018-1584-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Irene Di Ceglie
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Giuliana Ascone
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Niels A J Cremers
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Annet W Sloetjes
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Birgitte Walgreen
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Thomas Vogl
- Institute of Immunology, University of Münster, Münster, Germany
| | - Johannes Roth
- Institute of Immunology, University of Münster, Münster, Germany
| | - J Sjef Verbeek
- Human Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | - Fons A J van de Loo
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Marije I Koenders
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Peter M van der Kraan
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Arjen B Blom
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Martijn H J van den Bosch
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands
| | - Peter L E M van Lent
- Experimental Rheumatology, Radboud university medical center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands.
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12
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Meier LA, Binstadt BA. The Contribution of Autoantibodies to Inflammatory Cardiovascular Pathology. Front Immunol 2018; 9:911. [PMID: 29755478 PMCID: PMC5934424 DOI: 10.3389/fimmu.2018.00911] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/12/2018] [Indexed: 12/19/2022] Open
Abstract
Chronic inflammation and resulting tissue damage underlie the vast majority of acquired cardiovascular disease (CVD), a general term encompassing a widely diverse array of conditions. Both innate and adaptive immune mechanisms contribute to chronic inflammation in CVD. Although maladies, such as atherosclerosis and cardiac fibrosis, are commonly conceptualized as disorders of inflammation, the cellular and molecular mechanisms that promote inflammation during the natural history of these diseases in human patients are not fully defined. Autoantibodies (AAbs) with specificity to self-derived epitopes accompany many forms of CVD in humans. Both adaptive/induced iAAbs (generated following cognate antigen encounter) and also autoantigen-reactive natural antibodies (produced independently of infection and in the absence of T cell help) have been demonstrated to modulate the natural history of multiple forms of CVD including atherosclerosis (atherosclerotic cardiovascular disease), dilated cardiomyopathy, and valvular heart disease. Despite the breadth of experimental evidence for the role of AAbs in CVD, there is a lack of consensus regarding their specific functions, primarily due to disparate conclusions reached, even when similar approaches and experimental models are used. In this review, we seek to summarize the current understanding of AAb function in CVD through critical assessment of the clinical and experimental evidence in this field. We additionally highlight the difficulty in translating observations made in animal models to human physiology and disease and provide a summary of unresolved questions that are critical to address in future studies.
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Affiliation(s)
- Lee A Meier
- Center for Immunology, Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, United States
| | - Bryce A Binstadt
- Center for Immunology, Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, United States
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13
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Fransen MF, Benonisson H, van Maren WW, Sow HS, Breukel C, Linssen MM, Claassens JWC, Brouwers C, van der Kaa J, Camps M, Kleinovink JW, Vonk KK, van Heiningen S, Klar N, van Beek L, van Harmelen V, Daxinger L, Nandakumar KS, Holmdahl R, Coward C, Lin Q, Hirose S, Salvatori D, van Hall T, van Kooten C, Mastroeni P, Ossendorp F, Verbeek JS. A Restricted Role for FcγR in the Regulation of Adaptive Immunity. THE JOURNAL OF IMMUNOLOGY 2018. [PMID: 29523656 DOI: 10.4049/jimmunol.1700429] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
By their interaction with IgG immune complexes, FcγR and complement link innate and adaptive immunity, showing functional redundancy. In complement-deficient mice, IgG downstream effector functions are often impaired, as well as adaptive immunity. Based on a variety of model systems using FcγR-knockout mice, it has been concluded that FcγRs are also key regulators of innate and adaptive immunity; however, several of the model systems underpinning these conclusions suffer from flawed experimental design. To address this issue, we generated a novel mouse model deficient for all FcγRs (FcγRI/II/III/IV-/- mice). These mice displayed normal development and lymphoid and myeloid ontogeny. Although IgG effector pathways were impaired, adaptive immune responses to a variety of challenges, including bacterial infection and IgG immune complexes, were not. Like FcγRIIb-deficient mice, FcγRI/II/III/IV-/- mice developed higher Ab titers but no autoantibodies. These observations indicate a redundant role for activating FcγRs in the modulation of the adaptive immune response in vivo. We conclude that FcγRs are downstream IgG effector molecules with a restricted role in the ontogeny and maintenance of the immune system, as well as the regulation of adaptive immunity.
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Affiliation(s)
- Marieke F Fransen
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Hreinn Benonisson
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Wendy W van Maren
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Heng Sheng Sow
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Cor Breukel
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Margot M Linssen
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Jill W C Claassens
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Conny Brouwers
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Jos van der Kaa
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Marcel Camps
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Jan Willem Kleinovink
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Kelly K Vonk
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Sandra van Heiningen
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Ngaisah Klar
- Department of Nephrology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Lianne van Beek
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Vanessa van Harmelen
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Lucia Daxinger
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Kutty S Nandakumar
- Department of Medical Biochemistry and Biophysics, Karolinska Institute, 17177 Stockholm, Sweden.,School of Pharmaceutical Sciences, Southern Medical University, 510515 Guangzhou, China
| | - Rikard Holmdahl
- Department of Medical Biochemistry and Biophysics, Karolinska Institute, 17177 Stockholm, Sweden
| | - Chris Coward
- Department of Veterinary Medicine, University of Cambridge, Cambridge CB3 0ES, United Kingdom
| | - Qingshun Lin
- Department of Pathology, Juntendo University School of Medicine, Tokyo 113-8421, Japan
| | - Sachiko Hirose
- Toin Human Science and Technology Center, Department of Biomedical Engineering, Toin University of Yokohama, Yokohama 225-8502, Japan
| | - Daniela Salvatori
- Department of Anatomy, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands; and
| | - Thorbald van Hall
- Department of Clinical Oncology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Cees van Kooten
- Department of Nephrology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Piero Mastroeni
- Department of Veterinary Medicine, University of Cambridge, Cambridge CB3 0ES, United Kingdom
| | - Ferry Ossendorp
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - J Sjef Verbeek
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands;
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14
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Hartholt RB, Wroblewska A, Herczenik E, Peyron I, Ten Brinke A, Rispens T, Nolte MA, Slot E, Claassens JW, Nimmerjahn F, Verbeek JS, Voorberg J. Enhanced uptake of blood coagulation factor VIII containing immune complexes by antigen presenting cells. J Thromb Haemost 2017; 15:329-340. [PMID: 27868337 DOI: 10.1111/jth.13570] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Indexed: 02/01/2023]
Abstract
Essentials Anti-factor (F) VIII antibody formation is a major complication in the treatment of hemophilia A. We investigated uptake of FVIII and FVIII immune complex by bone marrow derived dendritic cells. Immune complex formation increased uptake of FVIII 3-4 fold in a Fcγ receptor dependent manner. FVIII immune complex binding to Fcγ receptors may modulate immune tolerance induction. SUMMARY Background A major complication in the treatment of hemophilia A is the development of inhibitory antibodies targeting coagulation factor VIII (FVIII). Eradication of these inhibitors can be established by immune tolerance induction (ITI), which consists of daily administration of high dosages of FVIII. FVIII immune complexes (FVIII-IC) could be formed following FVIII infusion in patients with pre-existing anti-FVIII antibodies. Objectives Here we studied endocytosis of FVIII-IC by bone marrow-derived dendritic cells (BMDCs). Methods BMDCs were pulsed with FVIII/FVIII-IC and uptake was assessed by flow cytometry and confocal imaging. Results BMDCs were able to efficiently internalize FVIII-IC in a dose-dependent manner, 3-4-fold more efficiently when compared with equimolar concentrations of non-complexed FVIII. Uptake of FVIII-IC, but not FVIII alone, could be inhibited with anti-Fcγ receptor (FcγR) antibody 2.4G2, indicating functional involvement of FcγR. No internalization of FVIII-IC was observed in BMDCs lacking FcγRI, FcγRIIb, FcγRIII and FcγRIV. Genetic ablation of FcγRIIb, FcγRIII or FcγRIV individually did not affect the ability of anti-FVIII IgG to promote the uptake of FVIII. BMDCs lacking FcγRI showed lower FVIII-IC uptake levels when compared with other single FcγR null BMDCs. Expression of the inhibitory FcγRIIb alone was sufficient to internalize FVIII-IC more efficiently than FVIII. Conclusions FcγR are critical in the internalization of FVIII-IC by BMDCs and multiple FcγR can contribute independently to this process. Our findings provide a basis for future studies to address whether the outcome of ITI is dependent on the interplay between FVIII-IC and inhibitory and activating FcγR.
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Affiliation(s)
- R B Hartholt
- Department of Plasma Proteins, Sanquin-AMC Landsteiner Laboratory, Amsterdam, the Netherlands
| | - A Wroblewska
- Department of Plasma Proteins, Sanquin-AMC Landsteiner Laboratory, Amsterdam, the Netherlands
| | - E Herczenik
- Department of Plasma Proteins, Sanquin-AMC Landsteiner Laboratory, Amsterdam, the Netherlands
| | - I Peyron
- Department of Plasma Proteins, Sanquin-AMC Landsteiner Laboratory, Amsterdam, the Netherlands
| | - A Ten Brinke
- Department of Immunopathology, Sanquin-AMC Landsteiner Laboratory, Amsterdam, the Netherlands
| | - T Rispens
- Department of Immunopathology, Sanquin-AMC Landsteiner Laboratory, Amsterdam, the Netherlands
| | - M A Nolte
- Department of Hematopoiesis, Sanquin-AMC Landsteiner Laboratory, Amsterdam, the Netherlands
| | - E Slot
- Department of Hematopoiesis, Sanquin-AMC Landsteiner Laboratory, Amsterdam, the Netherlands
| | - J W Claassens
- Department of Human Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | - F Nimmerjahn
- Chair of Genetics, Department of Biology, University of Erlangen-Nuremberg, Erlangen, Germany
| | - J S Verbeek
- Department of Human Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | - J Voorberg
- Department of Plasma Proteins, Sanquin-AMC Landsteiner Laboratory, Amsterdam, the Netherlands
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15
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Abstract
Autoimmune carditis is associated with many human rheumatic conditions, including rheumatic fever, systemic lupus erythematosus, and rheumatoid arthritis. The immune mechanisms that mediate the cardiovascular pathology connected to these diseases are poorly defined. Several animal models are used to recapitulate human pathophysiology in order to better characterize the immunopathogenic mechanisms driving autoimmune endocardial inflammation. These animal models point toward common mechanisms mediating autoimmune endocarditis; in particular, CD4+ T cells and pro-inflammatory macrophages play critical roles in directing the disease process. The goals of this review are to discuss the prevailing animal models of autoimmune endocarditis and their underlying immunologic mechanisms and to provide insight regarding potential therapeutic targets in humans.
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