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Ye B, Chen B, Guo C, Xiong N, Huang Y, Li M, Lai Y, Li J, Zhou M, Wang S, Wang S, Yang N, Zhang H. C5a-C5aR1 axis controls mitochondrial fission to promote podocyte injury in lupus nephritis. Mol Ther 2024; 32:1540-1560. [PMID: 38449312 PMCID: PMC11081871 DOI: 10.1016/j.ymthe.2024.03.003] [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: 10/19/2023] [Revised: 02/05/2024] [Accepted: 03/04/2024] [Indexed: 03/08/2024] Open
Abstract
Podocytes are essential to maintaining the integrity of the glomerular filtration barrier, but they are frequently affected in lupus nephritis (LN). Here, we show that the significant upregulation of Drp1S616 phosphorylation in podocytes promotes mitochondrial fission, leading to mitochondrial dysfunction and podocyte injury in LN. Inhibition or knockdown of Drp1 promotes mitochondrial fusion and protects podocytes from injury induced by LN serum. In vivo, pharmacological inhibition of Drp1 reduces the phosphorylation of Drp1S616 in podocytes in lupus-prone mice. Podocyte injury is reversed when Drp1 is inhibited, resulting in the alleviation of proteinuria. Mechanistically, complement component C5a (C5a) upregulates the phosphorylation of Drp1S616 and promotes mitochondrial fission in podocytes. Moreover, the expression of C5a receptor 1 (C5aR1) is notably upregulated in podocytes in LN. C5a-C5aR1 axis-controlled phosphorylation of Drp1S616 and mitochondrial fission are substantially suppressed when C5aR1 is knocked down by siRNA. Moreover, lupus-prone mice treated with C5aR inhibitor show reduced phosphorylation of Drp1S616 in podocytes, resulting in significantly less podocyte damage. Together, this study uncovers a novel mechanism by which the C5a-C5aR1 axis promotes podocyte injury by enhancing Drp1-mediated mitochondrial fission, which could have significant implications for the treatment of LN.
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Affiliation(s)
- Baokui Ye
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Binfeng Chen
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Chaohuan Guo
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Ningjing Xiong
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Yuefang Huang
- Department of Pediatrics, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Mengyuan Li
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Yimei Lai
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Jin Li
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Mianjing Zhou
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Shuang Wang
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Shuyi Wang
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Niansheng Yang
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China.
| | - Hui Zhang
- Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China; Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China.
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Labouret M, Trebossen V, Ntorkou A, Bartoli S, Aubart M, Auvin S, Bader-Meunier B, Baudouin V, Corseri O, Dingulu G, Ducrocq C, Dumaine C, Elmaleh M, Fabien N, Faye A, Hau I, Hentgen V, Kwon T, Meinzer U, Ouldali N, Parmentier C, Pouletty M, Renaldo F, Savioz I, Benoist JF, Le Roux E, Ellul P, Melki I. Juvenile neuropsychiatric systemic lupus erythematosus: A specific clinical phenotype and proposal of a probability score. Lupus 2024; 33:328-339. [PMID: 38315109 DOI: 10.1177/09612033241229022] [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] [Indexed: 02/07/2024]
Abstract
OBJECTIVE Juvenile systemic lupus erythematosus (j-SLE) is a rare chronic auto-immune disease involving several organs. Neuropsychiatric (NP) SLE (NPSLE) is frequent in j-SLE and associated with increased morbidity/mortality. Although NPSLE classification criteria exist, attributing NP features to j-SLE remains a major challenge. The study objective is to thoroughly describe j-NPSLE patients and assist in their diagnosis. METHODS This is a 4-year retrospective monocentric study of j-SLE patients. NP events were attributed to j-SLE using standardised diagnostic criteria and multidisciplinary paediatric clinical expertise. Clinical features, brain magnetic resonance imaging (MRI)s and samples analysis including cerebrospinal fluid were assessed. A risk of j-NPSLE score was developed based on multivariable logistic regression analysis. RESULTS Of 39 patients included, 44% were identified as having j-NPSLE. J-NPSLE diagnosis was established at the onset of j-SLE in 59% of patients. In addition to frequent kidney involvement (76%) and chilblains (65%), all j-NPSLE patients displayed psychiatric features: cognitive symptoms (82%), hallucinations (76%), depressed mood (35%), acute confused state (18%) and catatonia (12%). Neurological involvement was often mild and nonspecific, with headache (53%) in about half of the patients. The main features reported on brain MRI were nonspecific T2/FLAIR white matter hyperintensities (65%), and cerebral atrophy (88%). Upon immunosuppressive treatment, clinical improvement of NP features was observed in all j-NPSLE patients. The score developed to attribute j-NPSLE probability, guide further investigations and appropriate treatments is based on hallucinations, memory, sleep and renal involvement (Sensitivity: 0.95 Specificity: 0.85). Cerebrospinal fluid (CSF) neopterin assessment increases the score sensitivity and specificity. CONCLUSION Physicians should carefully and systematically assess the presence of NP features at diagnosis and early stages of j-SLE. For j-NPSLE patients with predominant psychiatric features, a multidisciplinary collaboration, including psychiatrists, is essential for the diagnosis, management and follow-up.
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Affiliation(s)
- Mathilde Labouret
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
- Sorbonne Université, Paris, France
| | - Vincent Trebossen
- Department of Child and Adolescent Psychiatry, Robert Debré Mother-Child University Hospital, AP-HP, Paris, France
- Université Paris Cité, UFR de Médecine Paris Nord, Paris, France
| | - Alexandra Ntorkou
- Department of Paediatric Radiology, Robert Debré Mother-Child University Hospital, AP-HP, Paris, France
| | - Sophie Bartoli
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
| | - Mélodie Aubart
- Paediatric Neurology Department, Necker-Enfants Malades Hospital, University of Paris-Cité, AP-HP, Paris, France
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, French Institute of Health and Medical Research U1163, Imagine Institute, University of Paris-Cité, Paris, France
| | - Stéphane Auvin
- Department of Paediatric Neurology, Center for Rare Epilepsies & Epilepsy Unit, Robert Debré Mother-Child University Hospital, AP-HP, Paris, France
- Université Paris Cité, INSERM NeuroDiderot, Paris, France
- Institut Universitaire de France (IUF), Paris, France
| | - Brigitte Bader-Meunier
- Department of Paediatric Haematology-Immunology And Rheumatology, Necker-Enfants-Malades University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
- Laboratory of Immunogenetics of Paediatric Autoimmune Diseases, Imagine Institute, INSERM UMR 1163, Université Paris Cité, Paris, France
| | - Véronique Baudouin
- Department of Paediatric Nephrology, Robert Debré Mother-Child University Hospital, AP-HP, Paris, France
| | - Olivier Corseri
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
| | - Glory Dingulu
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
| | - Camille Ducrocq
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
| | - Cécile Dumaine
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
| | - Monique Elmaleh
- Department of Paediatric Radiology, Robert Debré Mother-Child University Hospital, AP-HP, Paris, France
| | - Nicole Fabien
- Immunology Department, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Lyon, France
| | - Albert Faye
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
- Université Paris Cité, UFR de Médecine Paris Nord, Paris, France
- UMR1123 Inserm, Université Paris Cité, Paris, France
| | - Isabelle Hau
- Department of General Paediatrics, Centre Hospitalier Intercommunal de Créteil, Créteil, France
| | - Véronique Hentgen
- Department of General Paediatrics, French Reference centre for Autoinflammatory diseases and amyloidosis (CEREMAIA), Versailles Hospital, Le Chesnay, France
| | - Théresa Kwon
- Department of Paediatric Nephrology, Robert Debré Mother-Child University Hospital, AP-HP, Paris, France
| | - Ulrich Meinzer
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
- Université Paris Cité, UFR de Médecine Paris Nord, Paris, France
- Center for Research on Inflammation, INSERM, Université Paris Cité, Paris, France
- Biology and Genetics of Bacterial Cell Wall Unit, Pasteur Institute, Paris, France
| | - Naim Ouldali
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
- Université Paris Cité, UFR de Médecine Paris Nord, Paris, France
| | - Cyrielle Parmentier
- Department of Paediatric Nephrology, Armand-Trousseau Childrens' Hospital, AP-HP, Paris, France
| | - Marie Pouletty
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
| | - Florence Renaldo
- Department of Paediatric Neurology, Center for Neurogenetic Diseases, Armand-Trousseau Childrens' Hospital, AP-HP, Paris, France
| | - Isabelle Savioz
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
| | - Jean-François Benoist
- Metabolic Biochemistry Laboratory, Reference Centre for Inherited Metabolic Diseases, Necker-Enfants-Malades University Hospital, AP-HP, Paris, France
- Université Paris Saclay, UFR Pharmacie, France
| | - Enora Le Roux
- UMR1123 Inserm, Université Paris Cité, Paris, France
- Unité d'Épidémiologie Clinique, Inserm, CIC 1426, Robert Debré Mother-Child University Hospital, Nord-Université Paris Cité, AP-HP, Paris, France
| | - Pierre Ellul
- Department of Child and Adolescent Psychiatry, Robert Debré Mother-Child University Hospital, AP-HP, Paris, France
- Immunology-Immunopathology-Immunotherapy (i3), Sorbonne Université, Paris, France
| | - Isabelle Melki
- General Paediatrics, Department of Infectious Disease and Internal Medicine, Robert Debré Mother-Child University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
- Department of Paediatric Haematology-Immunology And Rheumatology, Necker-Enfants-Malades University Hospital, Reference Centre for Rheumatic, AutoImmune and Systemic Diseases in Children (RAISE), AP-HP, Paris, France
- Imagine Institute, Laboratory of Neurogenetics and Neuroinflammation, INSERM UMR 1163, Université Paris Cité, Paris, France
- Paediatrics, Rheumatology and Paediatric Internal Medicine, Children's Hospital, Bordeaux, France
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Schanzenbacher J, Hendrika Kähler K, Mesler E, Kleingarn M, Marcel Karsten C, Leonard Seiler D. The role of C5a receptors in autoimmunity. Immunobiology 2023; 228:152413. [PMID: 37598588 DOI: 10.1016/j.imbio.2023.152413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/04/2023] [Accepted: 06/10/2023] [Indexed: 08/22/2023]
Abstract
The complement system is an essential component of the innate immune response and plays a vital role in host defense and inflammation. Dysregulation of the complement system, particularly involving the anaphylatoxin C5a and its receptors (C5aR1 and C5aR2), has been linked to several autoimmune diseases, indicating the potential for targeted therapies. C5aR1 and C5aR2 are seven-transmembrane receptors with distinct signaling mechanisms that play both partially overlapping and opposing roles in immunity. Both receptors are expressed on a broad spectrum of immune and non-immune cells and are involved in cellular functions and physiological processes during homeostasis and inflammation. Dysregulated C5a-mediated inflammation contributes to autoimmune diseases such as rheumatoid arthritis, systemic lupus erythematosus, multiple sclerosis, epidermolysis bullosa acquisita, antiphospholipid syndrome, and others. Therefore, targeting C5a or its receptors may yield therapeutic innovations in these autoimmune diseases by reducing the recruitment and activation of immune cells that lead to tissue inflammation and injury, thereby exacerbating the autoimmune response. Clinical trials focused on the inhibition of C5 cleavage or the C5a/C5aR1-axis using small molecules or monoclonal antibodies hold promise for bringing novel treatments for autoimmune diseases into practice. However, given the heterogeneous nature of (systemic) autoimmune diseases, there are still several challenges, such as patient selection, optimal dosing, and treatment duration, that require further investigation and development to realize the full therapeutic potential of C5a receptor inhibition, ideally in the context of a personalized medicine approach. Here, we aim to provide a brief overview of the current knowledge on the function of C5a receptors, the involvement of C5a receptors in autoimmune disorders, the molecular mechanisms underlying C5a receptor-mediated autoimmunity, and the potential for targeted therapies to modulate their activity.
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Affiliation(s)
- Jovan Schanzenbacher
- Institute for Systemic Inflammation Research (ISEF), University of Lübeck, Lübeck, Germany
| | - Katja Hendrika Kähler
- Institute for Systemic Inflammation Research (ISEF), University of Lübeck, Lübeck, Germany
| | - Evelyn Mesler
- Institute for Systemic Inflammation Research (ISEF), University of Lübeck, Lübeck, Germany
| | - Marie Kleingarn
- Institute for Systemic Inflammation Research (ISEF), University of Lübeck, Lübeck, Germany
| | | | - Daniel Leonard Seiler
- Institute for Systemic Inflammation Research (ISEF), University of Lübeck, Lübeck, Germany.
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Ghosh M, Rana S. The anaphylatoxin C5a: Structure, function, signaling, physiology, disease, and therapeutics. Int Immunopharmacol 2023; 118:110081. [PMID: 36989901 DOI: 10.1016/j.intimp.2023.110081] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 03/06/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023]
Abstract
The complement system is one of the oldest known tightly regulated host defense systems evolved for efficiently functioning cell-based immune systems and antibodies. Essentially, the complement system acts as a pivot between the innate and adaptive arms of the immune system. The complement system collectively represents a cocktail of ∼50 cell-bound/soluble glycoproteins directly involved in controlling infection and inflammation. Activation of the complement cascade generates complement fragments like C3a, C4a, and C5a as anaphylatoxins. C5a is the most potent proinflammatory anaphylatoxin, which is involved in inflammatory signaling in a myriad of tissues. This review provides a comprehensive overview of human C5a in the context of its structure and signaling under several pathophysiological conditions, including the current and future therapeutic applications targeting C5a.
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Affiliation(s)
- Manaswini Ghosh
- Chemical Biology Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Odisha 752050, India
| | - Soumendra Rana
- Chemical Biology Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Odisha 752050, India.
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Kuboi Y, Suzuki Y, Motoi S, Matsui C, Toritsuka N, Nakatani T, Tahara K, Takahashi Y, Ida Y, Tomimatsu A, Soejima M, Imai T. Identification of potent siRNA targeting complement C5 and its robust activity in pre-clinical models of myasthenia gravis and collagen-induced arthritis. MOLECULAR THERAPY. NUCLEIC ACIDS 2023; 31:339-351. [PMID: 36789273 PMCID: PMC9900455 DOI: 10.1016/j.omtn.2023.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 01/10/2023] [Indexed: 01/15/2023]
Abstract
Complement component 5 (C5), an important molecule in the complement cascade, blockade by antibodies shows clinical efficacy in treating complement-mediated disorders. However, insufficient blockading induced by single-nucleotide polymorphisms in the C5 protein or frequent development of "breakthrough" intravascular hemolysis in patients with paroxysmal nocturnal hemoglobinuria treated with eculizumab have been reported. Herein, we developed a lipid nanoparticle (LNP)-formulated siRNA targeting C5 that was efficiently delivered to the liver and silenced C5 expression. We identified a potent C5-siRNA with an in vitro IC50 of 420 pM and in vivo ED50 of 0.017 mg/kg following a single administration. Single or repeated administrations of the LNP-formulated C5-siRNA allowed robust and durable suppression of liver C5 expression in mice. Complement C5 silencing ameliorated C5b-dependent anti-acetylcholine receptor antibody-induced myasthenia gravis and C5a-dependent collagen-induced arthritis symptoms. Similarly, in nonhuman primates, a single administration of C5-siRNA/LNP-induced dose-dependent plasma C5 suppression and concomitantly inhibited serum complement activity; complement activity recovered to the pre-treatment levels at 65 days post administration, thus indicating that the complement activity can be controlled for a specific period. Our findings provide the foundation for further developing C5-siRNA delivered via LNPs as a potential therapeutic for complement-mediated diseases.
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Affiliation(s)
- Yoshikazu Kuboi
- KAN Research Institute, Inc., 6-8-2 Minatojima minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
- Corresponding author: Yoshikazu Kuboi, MS, KAN Research Institute, Inc., 6-8-2 Minatojima minamimachi, Kobe, Hyogo 650-0047, Japan.
| | - Yuta Suzuki
- Tsukuba Research Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Sotaro Motoi
- KAN Research Institute, Inc., 6-8-2 Minatojima minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Chiyuki Matsui
- KAN Research Institute, Inc., 6-8-2 Minatojima minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Naoki Toritsuka
- Tsukuba Research Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Tomoya Nakatani
- KAN Research Institute, Inc., 6-8-2 Minatojima minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Kazuhiro Tahara
- Tsukuba Research Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Yoshinori Takahashi
- Tsukuba Research Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan
| | - Yoko Ida
- KAN Research Institute, Inc., 6-8-2 Minatojima minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Ayaka Tomimatsu
- KAN Research Institute, Inc., 6-8-2 Minatojima minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Motohiro Soejima
- KAN Research Institute, Inc., 6-8-2 Minatojima minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Toshio Imai
- KAN Research Institute, Inc., 6-8-2 Minatojima minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
- Advanced Therapeutic Target Discovery, Kobe University Graduate School of Medicine, 1-5-6 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
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McDonnell T, Amarnani R, Spicer C, Jbari H, Pericleous C, Spiteri VA, Wincup C, Artim-Esen B, Mackie I, Botto M, Rahman A, Giles I. Antibodies to FXa and thrombin in patients with SLE differentially regulate C3 and C5 cleavage. Lupus Sci Med 2022; 9:e000738. [PMID: 36007979 PMCID: PMC9422842 DOI: 10.1136/lupus-2022-000738] [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: 05/30/2022] [Accepted: 08/08/2022] [Indexed: 12/03/2022]
Abstract
OBJECTIVES The significance of antibodies directed against activated factor X (FXa) and thrombin (Thr) in patients with SLE and/or antiphospholipid syndrome (APS) is unknown. FXa and Thr are coregulated by antithrombin (AT) and activate complement. Therefore, we studied the ability of anti activated factor X (aFXa) and/or anti-(a)Thr IgG from patients with SLE±APS to modulate complement activation. METHODS Patients with SLE±APS were selected on the basis of known aThr and/or aFXa IgG positivity, and the effects of affinity-purified aFXa/aThr IgG on FXa and Thr-mediated C3 and C5 activation were measured ±AT. Structural analyses of FXa and Thr and AT-FXa and AT-Thr complexes were analysed in conjunction with the in vitro ability of AT to regulate aFXa-FXa and aThr-Thr-mediated C3/C5 activation. RESULTS Using affinity-purified IgG from n=14 patients, we found that aThr IgG increased Thr-mediated activation of C3 and C5, while aFXa IgG did not increase C3 or C5 activation. Structural analysis identified potential epitopes and predicted a higher likelihood of steric hindrance of AT on FXa by aFXa IgG compared with the AT-Thr-aThr IgG complex that was confirmed by in vitro studies. Longitudinal analysis of 58 patients with SLE (±APS) did not find a significant association between positivity for aFXa or aTHr IgG and C3 levels or disease activity, although there was a trend for patients positive for aFXa IgG alone or both aFXa and aThr IgG to have lower levels of C3 compared with aThr IgG alone during clinical visits. CONCLUSIONS We propose a novel method of complement regulation in patients with SLE±APS whereby aFXa and aThr IgG may have differential effects on complement activation.
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Affiliation(s)
| | - Raj Amarnani
- Department of Rheumatology, University College London, London, UK
| | | | - Hajar Jbari
- Department of Rheumatology, University College London, London, UK
| | - Charis Pericleous
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Valentina A Spiteri
- Department of Structural and Molecular Biology, University College London, London, UK
| | - Chris Wincup
- Department of Rheumatology, University College London, London, UK
| | - Bahar Artim-Esen
- Department of Internal Medicine, Istanbul University, Fatih, Turkey
| | - Ian Mackie
- Department of Haematology, University College London, London, UK
| | - Marina Botto
- National Heart and Lung Institute, Imperial College London, London, UK
- Imperial College Healthcare NHS Trust, London, UK
| | - Anisur Rahman
- Department of Rheumatology, University College London, London, UK
| | - Ian Giles
- Department of Rheumatology, University College London, London, UK
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7
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Zhang L, Zhang M, Chen X, He Y, Chen R, Zhang J, Huang J, Ouyang C, Shi G. Identification of the tubulointerstitial infiltrating immune cell landscape and immune marker related molecular patterns in lupus nephritis using bioinformatics analysis. ANNALS OF TRANSLATIONAL MEDICINE 2021; 8:1596. [PMID: 33437795 PMCID: PMC7791250 DOI: 10.21037/atm-20-7507] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Background Systemic lupus erythematosus (SLE) is a multisystem autoimmune disease that commonly affects the kidneys. Research into markers that can predict the prognosis of tubulointerstitial lupus nephritis (LN) has been impeded by the lack of well-designed studies. Methods In this study, we selected and merged 3 sets of renal biopsy tubulointerstitial data from GSE32591, GSE69438, and GSE127797, including 95 LN and 15 living healthy donors. CIBERSORTx was utilized for differentially infiltrating immune cell (DIIC) analysis. Weighted Gene Co-Expression network analysis (WGCNA) was employed to explore differentially expressed gene (DEG) related modules. Combined WGCNA hub genes and protein-protein interaction (PPI) validation was used for immune marker identification. Lastly, unsupervised clustering was carried out to validate the correlation between these markers and clinical characteristics. Results Our findings unveiled TYROBP, C1QB, LAPTM5, CTSS, PTPRC as the 5 immune markers, which were negatively correlated with glomerular filtration rate (GFR). Specifically, the expression levels of TYROBP and C1QB were significantly different between proliferative LN (PLN) and membranous LN (MLN). Unsupervised clustering could aggregate LN by these immune marker expression spectrums. Conclusions This study is the first to identify infiltrating immune cells and associated molecular patterns in the tubulointerstitium of LN by utilizing bioinformatics methods. These findings contribute to a better understanding of the mechanisms behind LN, and promote more precise diagnosis.
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Affiliation(s)
- Lu Zhang
- Department of Nephrology, The First Affiliated Hospital of Xiamen University, Xiamen, China.,The Fifth Hospital of Xiamen, Xiang'an Branch, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Mengqin Zhang
- Department of Rheumatology, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Xing Chen
- Department of Nephrology, The First Affiliated Hospital of Xiamen University, Xiamen, China.,The Fifth Hospital of Xiamen, Xiang'an Branch, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Yan He
- Department of Rheumatology, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Rongjuan Chen
- Department of Rheumatology, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Jun Zhang
- Department of Nephrology, The First Affiliated Hospital of Xiamen University, Xiamen, China.,The Fifth Hospital of Xiamen, Xiang'an Branch, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Jiyi Huang
- Department of Nephrology, The First Affiliated Hospital of Xiamen University, Xiamen, China.,The Fifth Hospital of Xiamen, Xiang'an Branch, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Chun Ouyang
- Department of Nephrology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Guixiu Shi
- Department of Rheumatology, The First Affiliated Hospital of Xiamen University, Xiamen, China
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8
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Ort M, Dingemanse J, van den Anker J, Kaufmann P. Treatment of Rare Inflammatory Kidney Diseases: Drugs Targeting the Terminal Complement Pathway. Front Immunol 2020; 11:599417. [PMID: 33362783 PMCID: PMC7758461 DOI: 10.3389/fimmu.2020.599417] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 11/09/2020] [Indexed: 12/15/2022] Open
Abstract
The complement system comprises the frontline of the innate immune system. Triggered by pathogenic surface patterns in different pathways, the cascade concludes with the formation of a membrane attack complex (MAC; complement components C5b to C9) and C5a, a potent anaphylatoxin that elicits various inflammatory signals through binding to C5a receptor 1 (C5aR1). Despite its important role in pathogen elimination, priming and recruitment of myeloid cells from the immune system, as well as crosstalk with other physiological systems, inadvertent activation of the complement system can result in self-attack and overreaction in autoinflammatory diseases. Consequently, it constitutes an interesting target for specialized therapies. The paradigm of safe and efficacious terminal complement pathway inhibition has been demonstrated by the approval of eculizumab in paroxysmal nocturnal hematuria. In addition, complement contribution in rare kidney diseases, such as lupus nephritis, IgA nephropathy, atypical hemolytic uremic syndrome, C3 glomerulopathy, or antineutrophil cytoplasmic antibody-associated vasculitis has been demonstrated. This review summarizes the involvement of the terminal effector agents of the complement system in these diseases and provides an overview of inhibitors for complement components C5, C5a, C5aR1, and MAC that are currently in clinical development. Furthermore, a link between increased complement activity and lung damage in severe COVID-19 patients is discussed and the potential for use of complement inhibitors in COVID-19 is presented.
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Affiliation(s)
- Marion Ort
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Allschwil, Switzerland.,Pediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel (UKBB), University of Basel, Basel, Switzerland
| | - Jasper Dingemanse
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Allschwil, Switzerland
| | - John van den Anker
- Pediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel (UKBB), University of Basel, Basel, Switzerland.,Division of Clinical Pharmacology, Children's National Hospital, Washington, DC, United States
| | - Priska Kaufmann
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Allschwil, Switzerland
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9
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Tsubouchi S, Hayashi H, Tahara K, Ishii K, Yasuda T, Yamamoto Y, Mizuuchi T, Mori H, Tago M, Kato E, Sawada T. Clinical presentation of a neuropsychiatric lupus patient with symmetrical basal ganglia lesions containing cytotoxic oedema cores surrounded by vasogenic oedema. Mod Rheumatol Case Rep 2020; 4:39-46. [PMID: 33086978 DOI: 10.1080/24725625.2019.1651955] [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] [Indexed: 01/18/2023]
Abstract
Neuropsychiatric (NP) manifestations of systemic lupus erythematosus (SLE) are diverse, but involvement of basal ganglia is rare. We describe here a 28-year-old woman with NPSLE presenting aseptic meningitis accompanied by elevated interleukin-6 levels in the cerebrospinal fluid, who developed symmetrical basal ganglia lesions, containing a cytotoxic oedematous core, surrounded by vasogenic oedema upon magnetic resonance imaging. We were able to observe these lesions from a de novo appearance during the disease onset to its disappearance during immunosuppressive treatment. Reversibility upon immunosuppressive treatment indicated that autoimmune mediated mechanisms could contribute to the basal ganglia lesions in NPSLE.
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Affiliation(s)
- Syoko Tsubouchi
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Haeru Hayashi
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Koichiro Tahara
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Kayo Ishii
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Takuya Yasuda
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Yusuke Yamamoto
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Takahiro Mizuuchi
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Hiroaki Mori
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Mayu Tago
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Eri Kato
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
| | - Tetsuji Sawada
- Department of Rheumatology, Tokyo Medical University Hospital, Tokyo, Japan
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10
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Hiepe F. Neue Erkenntnisse zur Pathogenese des SLE und ihre Auswirkungen auf
die Entwicklung neuer Therapie-Konzepte. AKTUEL RHEUMATOL 2020. [DOI: 10.1055/a-1210-2259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
ZusammenfassungAutoantikörper sind essentiell in der Pathogenese des SLE. Sie sind das
Ergebnis einer Störung des erworbenen (adaptiven) Immunsystems mit
fehlender Toleranz gegen Selbst. Eine Typ-I Interferon-Signatur, die im
angeborenen (innaten) Immunsystem ihren Ursprung hat, ist ein wesentlicher
Treiber dieser Störung. Autoantikörper können sowohl von
kurzlebigen, proliferierenden Plasmablasten, die B-Zell-Hyperaktivität
widerspiegeln, als auch von langlebigen, nicht-proliferierenden
Gedächtnis-Plasmazellen sezerniert werden.
Gedächtnis-Plasmazellen, die in Nischen im Knochenmark und im
entzündeten Gewebe lokalisiert sind, lassen sich nicht durch
konventionelle Immunsuppressiva und Therapien mit B-Zellen als Target
eliminieren. Konzepte, die auf die Depletion von Gedächtnis-Plasmazellen
abzielen, können im Zusammenspiel mit Targets, die eine Aktivierung von
autoreaktiven B-Zellen verhindern, ein kuratives Potenzial haben.
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Affiliation(s)
- Falk Hiepe
- Medizinische Klinik mit Schwerpunkt Rheumatologie und klin.
Immunologie, Charité – Universitätsmedizin Berlin;
Deutsches Rheumaforschungszentrum – ein Institut der
Leibniz-Gemeinschaft, Berlin
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11
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Schwartz N, Stock AD, Putterman C. Neuropsychiatric lupus: new mechanistic insights and future treatment directions. Nat Rev Rheumatol 2020; 15:137-152. [PMID: 30659245 DOI: 10.1038/s41584-018-0156-8] [Citation(s) in RCA: 207] [Impact Index Per Article: 51.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Patients with systemic lupus erythematosus (SLE) frequently show symptoms of central nervous system (CNS) involvement, termed neuropsychiatric SLE (NPSLE). The CNS manifestations of SLE are diverse and have a broad spectrum of severity and prognostic implications. Patients with NPSLE typically present with nonspecific symptoms, such as headache and cognitive impairment, but might also experience devastating features, such as memory loss, seizures and stroke. Some features of NPSLE, in particular those related to coagulopathy, have been characterized and an evidence-based treatment algorithm is available. The cognitive and affective manifestations of NPSLE, however, remain poorly understood. Various immune effectors have been evaluated as contributors to its pathogenesis, including brain-reactive autoantibodies, cytokines and cell-mediated inflammation. Additional brain-intrinsic elements (such as resident microglia, the blood-brain barrier and other neurovascular interfaces) are important facilitators of NPSLE. As yet, however, no unifying model has been found to underlie the pathogenesis of NPSLE, suggesting that this disease has multiple contributors and perhaps several distinct aetiologies. This heterogeneity presents a challenge for clinicians who have traditionally relied on empirical judgement in choosing treatment modalities for patients with NPSLE. Improved understanding of this manifestation of SLE might yield further options for managing this disease.
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Affiliation(s)
- Noa Schwartz
- Division of Rheumatology, Hospital for Special Surgery, New York, NY, USA
| | - Ariel D Stock
- Department of Microbiology & Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Chaim Putterman
- Department of Microbiology & Immunology, Albert Einstein College of Medicine, Bronx, NY, USA. .,Division of Rheumatology, Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, NY, USA.
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12
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Yoneda M, Imamura R, Nitta H, Taniguchi K, Saito F, Kikuchi K, Ogi H, Tanaka T, Katabuchi H, Nakayama H, Imamura T. Enhancement of cancer invasion and growth via the C5a-C5a receptor system: Implications for cancer promotion by autoimmune diseases and association with cervical cancer invasion. Oncol Lett 2018; 17:913-920. [PMID: 30655847 PMCID: PMC6313068 DOI: 10.3892/ol.2018.9715] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 10/26/2018] [Indexed: 02/07/2023] Open
Abstract
Autoimmune diseases are caused by immune complex-induced activation of the complement system and subsequent inflammation. Recent studies have revealed an association between autoimmune diseases and worse survival in patients with cancer; however, the underlying mechanism is still unknown. The C5a-C5a receptor (C5aR) system has been shown to enhance cancer activity and recruit myeloid-derived suppressor cells (MDSCs) that suppress the anti-tumor immune response. The Arthus reaction is inflammation caused by complement system activation by the immune complex and thus is a model of autoimmune diseases. To explore the effect of the Arthus reaction on cancer progression, mouse cancer cells were inoculated in syngeneic mouse skin, where the Arthus reaction was induced simultaneously. The Arthus reaction enhanced invasion and tumor growth of C5aR-positive cancer cells, but not control cells, and induced MDSC recruitment. Intravenous injection of C5a-stimulated C5aR-positive cancer cells into nude mice resulted in more lung nodules than injection of nontreated C5aR-positive cells and C5a-stimulated C5aR-negative cells, supporting C5a-C5aR-mediated enhancement of cancer growth. C5aR expression in uterine cervical carcinoma stage I cells, which invade into the deeper tissues, was significantly higher than that in CIN3 cells, which remain in the epithelium. These results indicate that cancer promotion by the C5a-C5aR system may underlie poor prognosis in cancer patients with autoimmune diseases, particularly in patients with C5aR-positive cancer, and may be associated with cervical cancer invasion. The enhancement of cancer cell invasion and growth by the C5a-C5aR system suggests that this system is a possible target of cancer therapy.
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Affiliation(s)
- Masakazu Yoneda
- Department of Molecular Pathology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.,Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Ryuji Imamura
- Department of Molecular Pathology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.,Department of Urology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Hidetoshi Nitta
- Department of Gastroenterological Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Keisuke Taniguchi
- Pharmaceutical Research Department, Yakult Central Institute for Microbiological Research, Tokyo 186-8650, Japan
| | - Fumitaka Saito
- Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Ken Kikuchi
- Operations Division, Sakurajyuji Hospital, Kumamoto 861-4173, Japan
| | - Hidenao Ogi
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Takuya Tanaka
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Hidetaka Katabuchi
- Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Hideki Nakayama
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Takahisa Imamura
- Department of Molecular Pathology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
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Abstract
Systemic lupus erythematosus (SLE) is a representative systemic autoimmune disease that has various types of manifestations in multiple organs. Additionally, SLE is one of the most variable diseases in its epidemiology and etiology with heterogenous types of immune dysfunction. Since the word 'lupus' has first appeared in the literature in the Middle Ages, clinical/pathological knowledges have massively accumulated that contributed to the establishments and improvements of classification criteria, therapeutic agents or assessments of disease activity. Along with them, the survival rate of patients with SLE has dramatically improved. However, the mortality rate is still higher compared with the healthy population and the progress in basic, translational and clinical research are expected to lead to new insights into pathogenesis and identifying novel targets for therapy.
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Affiliation(s)
- Kenji Oku
- a Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine , Hokkaido University , Sapporo , Japan
| | - Tatsuya Atsumi
- a Department of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine and Faculty of Medicine , Hokkaido University , Sapporo , Japan
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14
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Umehara H, Kawano M. Response to: 'Serum complement factor C5a in IgG4-related disease' by Fukui et al. Ann Rheum Dis 2018; 78:e66. [PMID: 29875098 DOI: 10.1136/annrheumdis-2018-213729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 05/17/2018] [Indexed: 11/03/2022]
Affiliation(s)
- Hisanori Umehara
- Division of RA and Autoimmune Diseases, Nagahama City Hospital, Shiga, Japan
| | - Mitsuhiro Kawano
- Division of Rheumatology, Department of Internal Medicine, Graduate School of Medical Science, Kanazawa University, Ishikawa, Japan
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