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Benveniste O. Inflammatory myopathies in 2024: Better classify them to better treat them. Rev Neurol (Paris) 2024:S0035-3787(24)00595-2. [PMID: 39327213 DOI: 10.1016/j.neurol.2024.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2024] [Revised: 09/09/2024] [Accepted: 09/11/2024] [Indexed: 09/28/2024]
Abstract
The discovery, over the last forty years or so, of specific myositis auto-antibodies (easily dosed in routine nowadays) and the fine clinically and pathologically phenotypic descriptions of affected patients have made it possible to review the classification of inflammatory myopathies. The arrival of "omic" techniques has also led to the discovery of different pathophysiological mechanisms among these different subgroups of myositis. Naturally, therapeutic approaches specifically targeting the representative abnormal pathways of each subgroup are being evaluated. This modern approach to myositis, which is clinical, pathophysiological, and therapeutic in the making, is presented in this review article.
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Affiliation(s)
- O Benveniste
- UMR974, Sorbonne University, AP-HP, Paris, France; Department of Internal Medicine and Clinical Immunology, National Reference Centre for Inflammatory Myopathies, hôpital Pitié-Salpêtrière, Paris, France.
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Musai J, Mammen AL, Pinal-Fernandez I. Recent Updates on the Pathogenesis of Inflammatory Myopathies. Curr Rheumatol Rep 2024:10.1007/s11926-024-01164-7. [PMID: 39316320 DOI: 10.1007/s11926-024-01164-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/04/2024] [Indexed: 09/25/2024]
Abstract
PURPOSE OF REVIEW This review aims to provide a comprehensive and updated overview of autoimmune myopathies, with a special focus on the latest advancements in understanding the role of autoantibodies. We will begin by examining the risk factors and triggers associated with myositis. Next, we will delve into recent research on how autoantibodies contribute to disease pathogenesis. Finally, we will explore the latest innovations in treatment strategies and their implications for our understanding of myositis pathogenesis. RECENT FINDINGS Recent research has revealed that myositis-specific autoantibodies can infiltrate muscle cells and disrupt the function of their target autoantigens, playing a crucial role in disease pathogenesis. Significant advances in treatment include CD19 CAR-T cell therapy, JAK-STAT inhibitors, and novel strategies targeting the type 1 interferon pathway in dermatomyositis. Additionally, the ineffectiveness of complement inhibitors in treating immune-mediated necrotizing myositis has challenged established views on disease mechanisms. Autoimmune myopathies are a collection of disorders significantly influenced by specific autoantibodies that drive disease pathogenesis. This review highlights the critical role of autoantibody research in deepening our understanding of these conditions and discusses recent therapeutic advancements targeting key pathogenic pathways.
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Affiliation(s)
- Jon Musai
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, 50 South Drive, Room 1141, Building 50, MSC 8024, Bethesda, MD, 20892, USA
| | - Andrew L Mammen
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, 50 South Drive, Room 1141, Building 50, MSC 8024, Bethesda, MD, 20892, USA.
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Iago Pinal-Fernandez
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, 50 South Drive, Room 1141, Building 50, MSC 8024, Bethesda, MD, 20892, USA.
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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Yang H, Sun C, Ye L, Xu Y, Lin S, Peng Q, Wang G, Lu X. Association of anti-HMGCR antibodies of the IgM isotype with refractory immune-mediated necrotizing myopathy. Arthritis Res Ther 2024; 26:158. [PMID: 39261921 PMCID: PMC11389351 DOI: 10.1186/s13075-024-03387-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Accepted: 08/25/2024] [Indexed: 09/13/2024] Open
Abstract
OBJECTIVE Anti-3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMGCR) autoantibodies are one of the myositis-specific antibodies which is associated with immune-mediated necrotizing myopathy (IMNM). However, the relationship between anti-HMGCR isotypes and prognosis has not yet been fully investigated. This study was conducted to gain insight into the association between anti-HMGCR isotypes and clinical, and prognosis in IMNM patients who were positive for anti-HMGCR antibodies. METHODS Levels of anti-HMGCR isotypes (IgG, IgA and IgM) were assessed by enzyme-linked immunosorbent assay (ELISA) in 123 consecutive serum samples obtained from 71 patients who were positive for anti-HMGCR IgG at baseline. Disease activity was assessed by manual muscle testing (MMT) 8, Physician's Global Assessment (PGA) visual analog scale (VAS), and muscle VAS. RESULTS Baseline anti-HMGCR IgG levels were correlated with PGA VAS (r = 0.24; p = 0.04), muscle VAS (r = 0.32; p < 0.01), and MMT8(r=-0.24; p = 0.04), and baseline anti-HMGCR IgM levels were positively correlated with PGA VAS (r = 0.27, p = 0.02), muscle VAS (r = 0.24, p = 0.04). Anti-HMGCR IgM positive patients had a lower age of onset [29(25,46) vs. 51(33,65), p = 0.006], and a higher proportion of neck weakness (63.5% vs. 34.6%, p = 0.031) compared with anti-HMGCR IgM negative patients. Longitudinal analysis showed that the changes in anti-HMGCR IgG levels were correlated with the changes in the PGA VAS (β = 3.830; p < 0.0001), muscle VAS (β = 2.893; p < 0.0001), MMT8 (β=-19.368; p < 0.0001), and creatine kinase (CK) levels (β = 3900.05, p < 0.0001). Anti-HMGCR IgM levels were weakly correlated with anti-HMGCR IgA levels at baseline (r = 0.33, p < 0.01), and the variations in anti-HMGCR IgA levels were correlated with the changes in anti-HMGCR IgM levels during follow-up (β = 0.885; p < 0.0001). There were more patients with anti-HMGCR IgM who showed a refractory course than those who were with anti-HMGCR IgM negative (polycyclic course: 40% vs. 25%; chronic continuous course: 46.7% vs. 20.5%, p = 0.018). CONCLUSION In anti-HMGCR IgG-positive IMNM patients, the levels of anti-HMGCR IgG are associated with disease activity, and anti-HMGCR IgM is associated with refractory outcome and poor prognosis.
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Affiliation(s)
- Hongxia Yang
- Department of Rheumatology, Key Lab of Myositis, China-Japan Friendship Hospital, 2 Yinghua Road, Chaoyang District, Beijing, China
- Department of Clinical Laboratory, Peking University First Hospital, Beijing, China
| | - Chao Sun
- Department of Rheumatology, Key Lab of Myositis, China-Japan Friendship Hospital, 2 Yinghua Road, Chaoyang District, Beijing, China
| | - Lifang Ye
- Department of Rheumatology, Key Lab of Myositis, China-Japan Friendship Hospital, 2 Yinghua Road, Chaoyang District, Beijing, China
| | - Yuetong Xu
- Department of Rheumatology, Key Lab of Myositis, China-Japan Friendship Hospital, 2 Yinghua Road, Chaoyang District, Beijing, China
| | - Sang Lin
- Department of Rheumatology, Key Lab of Myositis, China-Japan Friendship Hospital, 2 Yinghua Road, Chaoyang District, Beijing, China
| | - Qinglin Peng
- Department of Rheumatology, Key Lab of Myositis, China-Japan Friendship Hospital, 2 Yinghua Road, Chaoyang District, Beijing, China
| | - Guochun Wang
- Department of Rheumatology, Key Lab of Myositis, China-Japan Friendship Hospital, 2 Yinghua Road, Chaoyang District, Beijing, China
| | - Xin Lu
- Department of Rheumatology, Key Lab of Myositis, China-Japan Friendship Hospital, 2 Yinghua Road, Chaoyang District, Beijing, China.
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Li C, Liu H, Yang L, Liu R, Yin G, Xie Q. Immune-mediated necrotizing myopathy: A comprehensive review of the pathogenesis, clinical features, and treatments. J Autoimmun 2024; 148:103286. [PMID: 39033686 DOI: 10.1016/j.jaut.2024.103286] [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: 03/16/2024] [Revised: 07/10/2024] [Accepted: 07/13/2024] [Indexed: 07/23/2024]
Abstract
Immune-mediated necrotizing myopathy (IMNM) is a rare and newly recognized autoimmune disease within the spectrum of idiopathic inflammatory myopathies. It is characterized by myositis-specific autoantibodies, elevated serum creatine kinase levels, inflammatory infiltrate, and weakness. IMNM can be classified into three subtypes based on the presence or absence of specific autoantibodies: anti-signal recognition particle myositis, anti-3-hydroxy-3-methylglutaryl-coenzyme A reductase myositis, and seronegative IMNM. In recent years, IMNM has gained increasing attention and emerged as a research hotspot. Recent studies have suggested that the pathogenesis of IMNM is linked to aberrant activation of immune system, including immune responses mediated by antibodies, complement, and immune cells, particularly macrophages, as well as abnormal release of inflammatory factors. Non-immune mechanisms such as autophagy and endoplasmic reticulum stress also participate in this process. Additionally, genetic variations associated with IMNM have been identified, providing new insights into the genetic mechanisms of the disease. Progress has also been made in IMNM treatment research, including the use of immunosuppressants and the development of biologics. Despite the challenges in understanding the etiology and treatment of IMNM, the latest research findings offer important guidance and insights for delving deeper into the disease's pathogenic mechanisms and identifying new therapeutic strategies.
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Affiliation(s)
- Changpei Li
- Department of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu, China
| | - Hongjiang Liu
- Department of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu, China
| | - Leiyi Yang
- Department of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu, China
| | - Ruiting Liu
- Department of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu, China
| | - Geng Yin
- Health Management Center, General Practice Medical Center, West China Hospital, Sichuan University, Chengdu, China.
| | - Qibing Xie
- Department of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu, China.
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Wu Y, Luo J, Duan L. Pathogenic mechanisms of disease in idiopathic inflammatory myopathies: autoantibodies as clues. Front Immunol 2024; 15:1439807. [PMID: 39281689 PMCID: PMC11392717 DOI: 10.3389/fimmu.2024.1439807] [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: 05/28/2024] [Accepted: 08/08/2024] [Indexed: 09/18/2024] Open
Abstract
Idiopathic inflammatory myopathies (IIMs) encompass a spectrum of autoimmune diseases characterized by muscle inflammation and systemic involvement. This review aimed to synthesize current evidence on the clinical significance and pathogenic mechanisms underlying autoantibodies associated with IIMs. Autoantibodies targeting aminoacyl-tRNA synthetases (ARS) play a pivotal role in antisynthetase syndrome (ASS), highlighting associations with interstitial lung disease (ILD) and distinctive clinical features. Anti-Mi-2 antibodies in dermatomyositis (DM) are hallmarked by characteristic cutaneous manifestations and favorable prognostic outcomes. Conversely, anti-TIF1 antibodies are correlated with DM and a higher risk of malignancies, implicating CD8+ T cells in its pathogenesis. Anti-MDA5 antibodies signify clinically amyopathic DM (CADM) with severe ILD, linked to dysregulated neutrophil extracellular trap (NET) formation. In immune-mediated necrotizing myopathies (IMNMs), anti-SRP and anti-HMGCR antibodies induce complement-mediated myopathy, typically following statin exposure. Additionally, anti-TRIM72 antibodies emerge as potential diagnostic markers in IIMs. Anti-cN1A autoantibodies are linked to inclusion body myositis (IBM) and play a decisive role in muscle protein degradation. Meanwhile, anti-FHL1 autoantibodies are associated with severe disease manifestations and muscle damage, as established in experimental models. Anti-eIF3 autoantibodies, recently identified in polymyositis (PM) patients, are rarely detected (<1%) and associated with a favorable prognosis. Elucidating these autoantibodies is anticipated to not only assist in early diagnosis and disease stratification but also inform targeted therapeutic interventions, emphasizing the intricate interplay between autoimmunity, cellular dysfunction, and clinical outcomes in IIMs.
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Affiliation(s)
- Yuanhui Wu
- Jiangxi Province Key Laboratory of Immunity and Inflammation, Jiangxi Provincial People's Hospital, Nanchang, China
- Department of Rheumatology and Clinical Immunology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
- JXHC Key Laboratory of Rheumatology and Immunology, Jiangxi Provincial People's Hospital, Nanchang, China
| | - Jiao Luo
- Jiangxi Province Key Laboratory of Immunity and Inflammation, Jiangxi Provincial People's Hospital, Nanchang, China
- Department of Rheumatology and Clinical Immunology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
- JXHC Key Laboratory of Rheumatology and Immunology, Jiangxi Provincial People's Hospital, Nanchang, China
| | - Lihua Duan
- Jiangxi Province Key Laboratory of Immunity and Inflammation, Jiangxi Provincial People's Hospital, Nanchang, China
- Department of Rheumatology and Clinical Immunology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
- JXHC Key Laboratory of Rheumatology and Immunology, Jiangxi Provincial People's Hospital, Nanchang, China
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Zhang H, Shi Y, Fan Y, Zhu D, Qiu Z, Chi H, Hu Q, Xie L, Sun Y, Liu H, Cheng X, Ye J, Shi H, Zhou Z, Meng J, Teng J, Yang C, Jin W, Su Y. Anti-signal recognition particle antibodies induce cardiac diastolic dysfunction via oxidative stress injury. Clin Transl Immunology 2024; 13:e1525. [PMID: 39139496 PMCID: PMC11321054 DOI: 10.1002/cti2.1525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 05/24/2024] [Accepted: 07/28/2024] [Indexed: 08/15/2024] Open
Abstract
Objectives Anti-signal recognition particle (SRP) antibodies, markers of immune-mediated necrotising myopathy, are reportedly related to cardiac involvement; however, whether they are pathogenic to the myocardium remains unclear. We aimed, therefore, to explore the pathogenicity of anti-SRP antibodies against the myocardium through in vivo and in vitro studies. Methods Total immunoglobulin G (IgG), purified from patients with positive anti-SRP antibodies, was passively transferred into C57BL/6 mice. Cardiac function was evaluated via echocardiography and the ventricular pressure-volume loop; cardiac histological changes were analysed using haematoxylin-eosin staining, picrosirius red staining, immunofluorescence and immunohistochemistry. Additionally, reactive oxygen species (ROS) formation was evaluated by dihydroethidium (DHE) staining; mitochondrial morphology and function were evaluated using transmission electron microscopy and seahorse mitochondrial respiration assay, respectively. The myositis cohort at our centre was subsequently reviewed in terms of cardiac assessments. Results After the passive transfer of total IgG from patients with positive anti-SRP antibodies, C57BL/6 mice developed significant left ventricular diastolic dysfunction (LVDD). Transcriptomic analysis and corresponding experiments revealed increased oxidative stress and mitochondrial damage in the hearts of the experimental mice. Cardiomyocytes exposed to anti-SRP-specific IgG, however, recovered normal mitochondrial metabolism after treatment with N-acetylcysteine, an ROS scavenger. Moreover, patients positive for anti-SRP antibodies manifested worse diastolic but equivalent systolic function compared to their counterparts after propensity score matching. Conclusion Anti-SRP antibodies may play a pathogenic role in the development of LVDD by promoting ROS production and subsequent myocardial mitochondrial impairment. The inhibition of oxidative stress was effective in reversing anti-SRP antibody-induced LVDD.
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Affiliation(s)
- Hao Zhang
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
- Department of Rheumatology and ImmunologyThe First Hospital of Lanzhou UniversityLanzhouGansuChina
- The First Clinical Medical CollegeLanzhou UniversityLanzhouGansuChina
| | - Yunjing Shi
- Department of Cardiovascular Medicine, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
- Department of Cardiovascular Medicine, Heart Failure Center, Ruijin Hospital, and Ruijin Hospital Lu Wan BranchShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Yingze Fan
- Department of Cardiovascular Medicine, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
- Department of Cardiovascular Medicine, Heart Failure Center, Ruijin Hospital, and Ruijin Hospital Lu Wan BranchShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Dehao Zhu
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Zeping Qiu
- Department of Cardiovascular Medicine, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
- Department of Cardiovascular Medicine, Heart Failure Center, Ruijin Hospital, and Ruijin Hospital Lu Wan BranchShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Huihui Chi
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Qiongyi Hu
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Liangzhe Xie
- Department of Laboratory Medicine, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Yue Sun
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Honglei Liu
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Xiaobing Cheng
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Junna Ye
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Hui Shi
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Zhuochao Zhou
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Jianfen Meng
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Jialin Teng
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Chengde Yang
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Wei Jin
- Department of Cardiovascular Medicine, Heart Failure Center, Ruijin Hospital, and Ruijin Hospital Lu Wan BranchShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Yutong Su
- Department of Rheumatology and Immunology, Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
- Shanghai Hospital of Civil Aviation Administration of ChinaShanghaiChina
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Okiyama N, Konishi R, Ichimura Y. Murine models of idiopathic inflammatory myopathies. J Dermatol 2024; 51:914-919. [PMID: 38321631 DOI: 10.1111/1346-8138.17142] [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: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 02/08/2024]
Abstract
Idiopathic inflammatory myopathies (IIMs) are divided into polymyositis and dermatomyositis (DM) with specific cutaneous manifestation. Several myositis-specific autoantibodies (MSAs) have been identified in IIMs and were found to be associated with distinct clinical features, including anti-synthetase syndrome (ASyS) and immune-mediated necrotizing myopathy (IMNM). Moreover, MSA-related clinical features have been identified even within DM. Although MSAs are valuable for the diagnosis of IIMs, the pathogenic roles of these antibodies remain unknown. To investigate the pathogenesis of IIMs, classical murine models of autoimmune myositis, experimental autoimmune myositis, and C protein-induced myositis have been established by immunization with muscle-specific antigens, myosin, and myosin-binding skeletal C protein, respectively. To according to MSA-related autoimmunity, a murine model of ASyS was generated by immunization with a murine recombinant histidyl-transfer RNA (tRNA) synthetase, Jo-1, in which muscle and lung inflammation are induced depending on acquired immunity. Furthermore, it was found that the transfer of human Immunoglobulin G (IgGs) from patients with IMNM, comprising anti-signal recognition particles and anti-3-hydroxy-3-methylglutaryl coenzyme A reductase antibodies, induced complement-mediated myositis in recipient mice. We found that CD8+ T cell-mediated myositis can be established depending on autoimmunity against transcriptional intermediary factor 1γ (TIF1γ), an autoantigen for MSAs induced by recombinant human TIF1γ immunization. These new murine models reflecting MSA-associated IIMs will reveal the immunological mechanisms underlying IIMs.
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Affiliation(s)
- Naoko Okiyama
- Department of Dermatology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Risa Konishi
- Department of Dermatology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuki Ichimura
- Department of Dermatology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Division of Rheumatology, Department of Internal Medicine, Tokyo Women's Medical University School of Medicine, Tokyo, Japan
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Pinal-Fernandez I, Muñoz-Braceras S, Casal-Dominguez M, Pak K, Torres-Ruiz J, Musai J, Dell'Orso S, Naz F, Islam S, Gutierrez-Cruz G, Cano MD, Matas-Garcia A, Padrosa J, Tobias-Baraja E, Garrabou G, Aldecoa I, Espinosa G, Simeon-Aznar CP, Guillen-Del-Castillo A, Gil-Vila A, Trallero-Araguás E, Christopher-Stine L, Lloyd TE, Liewluck T, Naddaf E, Stenzel W, Greenberg SA, Grau JM, Selva-O'Callaghan A, Milisenda JC, Mammen AL. Pathological autoantibody internalisation in myositis. Ann Rheum Dis 2024:ard-2024-225773. [PMID: 38902010 DOI: 10.1136/ard-2024-225773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 06/11/2024] [Indexed: 06/22/2024]
Abstract
OBJECTIVES Autoantibodies targeting intracellular proteins are common in various autoimmune diseases. In the context of myositis, the pathologic significance of these autoantibodies has been questioned due to the assumption that autoantibodies cannot enter living muscle cells. This study aims to investigate the validity of this assumption. METHODS Confocal immunofluorescence microscopy was employed to localise antibodies and other proteins of interest in myositis muscle biopsies. Bulk RNA sequencing was used to examine the transcriptomic profiles of 669 samples, including those from patients with myositis, disease controls and healthy controls. Additionally, antibodies from myositis patients were introduced into cultured myoblasts through electroporation, and their transcriptomic profiles were analysed using RNA sequencing. RESULTS In patients with myositis autoantibodies, antibodies accumulated inside myofibres in the same subcellular compartment as the autoantigen. Bulk RNA sequencing revealed that muscle biopsies from patients with autoantibodies targeting transcriptional regulators exhibited transcriptomic patterns consistent with dysfunction of the autoantigen. For instance, in muscle biopsies from patients with anti-PM/Scl autoantibodies recognising components of the nuclear RNA exosome complex, an accumulation of divergent transcripts and long non-coding RNAs was observed; these RNA forms are typically degraded by the nuclear RNA exosome complex. Introducing patient antibodies into cultured muscle cells recapitulated the transcriptomic effects observed in human disease. Further supporting evidence suggested that myositis autoantibodies recognising other autoantigens may also disrupt the function of their targets. CONCLUSIONS This study demonstrates that, in myositis, autoantibodies are internalised into living cells, causing biological effects consistent with the disrupted function of their autoantigen.
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Affiliation(s)
- Iago Pinal-Fernandez
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Sandra Muñoz-Braceras
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Maria Casal-Dominguez
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Katherine Pak
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Jiram Torres-Ruiz
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
- Immunology and Rheumatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Jon Musai
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Stefania Dell'Orso
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Faiza Naz
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Shamima Islam
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Gustavo Gutierrez-Cruz
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Maria Dolores Cano
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
| | - Ana Matas-Garcia
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | | | - Ester Tobias-Baraja
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | - Gloria Garrabou
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | - Iban Aldecoa
- Pathology, Neurological Tissue Bank, Hospital Clinic of Barcelona-CDB-IDIBAPS/FCRB-University of Barcelona, Barcelona, Spain
| | - Gerard Espinosa
- Barcelona University, Barcelona, Spain
- Department of Autoimmune Diseases, Reference Centre for Systemic Autoimmune Diseases (UEC/CSUR) of the Catalan and Spanish Health Systems-Member of ERN-ReCONNET, Hospital Clinic, Barcelona, Spain
| | - Carmen Pilar Simeon-Aznar
- Systemic Autoimmune Disease Section, Vall d'Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Alfredo Guillen-Del-Castillo
- Systemic Autoimmune Disease Section, Vall d'Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Albert Gil-Vila
- Systemic Autoimmune Disease Section, Vall d'Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Ernesto Trallero-Araguás
- Systemic Autoimmune Disease Section, Vall d'Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
- Rheumatology Department, Vall d'Hebron Hospital, Barcelona, Spain
| | - Lisa Christopher-Stine
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Thomas E Lloyd
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Teerin Liewluck
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Elie Naddaf
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Werner Stenzel
- Department of Neuropathology, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Berlin, Germany
| | - Steven A Greenberg
- Department of Neurology, Brigham and Women's Hospital and Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Josep Maria Grau
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | - Albert Selva-O'Callaghan
- Systemic Autoimmune Disease Section, Vall d'Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Jose Cesar Milisenda
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | - Andrew Lee Mammen
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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9
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Koumas C, Michelassi F. Immune-Mediated Necrotizing Myopathies: Current Landscape. Curr Neurol Neurosci Rep 2024; 24:141-150. [PMID: 38589696 DOI: 10.1007/s11910-024-01337-y] [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] [Accepted: 03/11/2024] [Indexed: 04/10/2024]
Abstract
PURPOSE OF REVIEW Immune-mediated necrotizing myopathy (IMNM), characterized by acute or subacute onset, severe weakness, and elevated creatine kinase levels, poses diagnostic and therapeutic challenges. This article provides a succinct overview of IMNM, including clinical features, diagnostic strategies, and treatment approaches. RECENT FINDINGS Recent insights highlight the different clinical presentations and therapeutic options of IMNM stratified by autoantibody positivity and type. Additionally, recent findings call into question the reported link between statin use and IMNM. This review synthesizes current knowledge on IMNM, emphasizing its distinct clinical features and challenging management. The evolving understanding of IMNM underscores the need for a comprehensive diagnostic approach that utilizes a growing range of modalities. Early and aggressive immunomodulatory therapy remains pivotal. Ongoing research aims to refine diagnostic tools and therapeutic interventions for this challenging muscle disorder, underscoring the importance of advancing our understanding to enhance patient outcomes.
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Affiliation(s)
- Christoforos Koumas
- Department of Neurology, Columbia University Medical Center, New York, NY, USA.
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10
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Trenque T, Hadjoudj J, Trenque A, Tralongo F, Martin S, Azzouz B. Statins and immune-mediated necrotizing myopathy: Variability in the risk. Therapie 2024; 79:365-370. [PMID: 37625939 DOI: 10.1016/j.therap.2023.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 07/04/2023] [Accepted: 07/20/2023] [Indexed: 08/27/2023]
Abstract
INTRODUCTION Immune-mediated necrotizing myopathy (IMNM) is a form of statin myopathy characterized by the presence of antibodies against 3-hydroxy-3-methylglutaryl-coenzyme A reductase (anti HMGCR). OBJECTIVES The aim of this study was to investigate the relationship between the different statins and the risk of IMNM. METHODS A two-time approach was used. First, we performed a descriptive analysis of the French national pharmacovigilance database (FNPV) for the period from 1985 to december2020. To identify relevant cases, we used Medical Dictionary for Regulatory Activities (MedDRA) preferred terms (PTs) related to IMNM. We performed a quantitative and qualitative review of individual case safety reports (ICSRs) recorded in the french vigilance spontaneous reporting system. In a second time, we performed a comparative analysis with the World Health Organization global individual case safety reports database (Vigibase). The association between IMNM and statins exposure was assessed by calculating the reporting odds ratio (ROR) and its 95% confidence interval. RESULTS After analysis, a total of 25 ICSRs were related to IMNM in the FNPV. The suspected statins were atorvastatin (n=21), simvastatin (n=2), pravastatin (n=1) and rosuvastatin (n=1). In Vigibase, 567 notifications were identified. A significant ROR value was found for atorvastatin, pitavastatin, simvastatin, pravastatin and rosuvastatin. CONCLUSION Atorvastatin presents the highest risk of IMNM. Our data suggest that the occurrence of IMNM is a class effect.
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Affiliation(s)
- Thierry Trenque
- Reims University Hospitals, Regional Centre for Pharmacovigilance and Pharmacoepidemiology, 51092 Reims, France; University of Reims Champagne-Ardenne, Faculty of Medicine, EA 3797, 51095 Reims, France.
| | - Jed Hadjoudj
- Reims University Hospitals, Regional Centre for Pharmacovigilance and Pharmacoepidemiology, 51092 Reims, France
| | - Agathe Trenque
- Reims University Hospitals, Regional Centre for Pharmacovigilance and Pharmacoepidemiology, 51092 Reims, France
| | - Federica Tralongo
- Reims University Hospitals, Regional Centre for Pharmacovigilance and Pharmacoepidemiology, 51092 Reims, France
| | - Salomé Martin
- Reims University Hospitals, Regional Centre for Pharmacovigilance and Pharmacoepidemiology, 51092 Reims, France
| | - Brahim Azzouz
- Reims University Hospitals, Regional Centre for Pharmacovigilance and Pharmacoepidemiology, 51092 Reims, France; University of Reims Champagne-Ardenne, Faculty of Medicine, EA 3797, 51095 Reims, France
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11
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Martínez-Rodríguez P, Escribano-Iglesias M, Crisolino-Pozas ÁP, Cubino-Boveda N, López-Parra M, Marcos M, Chamorro AJ. Plasma Exchange in Anti-Signal Recognition Particle Myopathy: A Systematic Review and Combined Analysis of Patient Individual Data. J Pers Med 2024; 14:461. [PMID: 38793043 PMCID: PMC11122241 DOI: 10.3390/jpm14050461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 04/24/2024] [Accepted: 04/26/2024] [Indexed: 05/26/2024] Open
Abstract
Anti-signal recognition particle myopathy (anti-SRP myopathy) is a rare subtype of immune-mediated inflammatory myopathy characterized by muscle weakness and anti-SRP autoantibodies. Although plasma exchange (PE) is used in severe cases, its role remains unclear. A systematic review was conducted following PRISMA guidelines, identifying 23 patients with anti-SRP myopathy treated with PE. Data on demographics, clinical features, laboratory findings, treatments, and outcomes were analyzed combining individual patient data if available. Sixteen (69.6%) patients were male, with muscle weakness as the predominant symptom in 100% of cases. After PE, most patients showed improvement in symptoms, and the proportion of patients with muscle weakness was reduced (p = 0.001). Relapse occurred in 17.4% of the cases. The incidence of adverse events was low (8.7%). Despite limitations, including a small sample size and heterogeneous data, our systematic review suggests that PE may be effective in inducing remission and controlling symptoms in anti-SRP myopathy, particularly in severe cases. Since evidence on PE in anti-SRP myopathy is limited, further research, including prospective multicenter studies, is warranted to understand better its efficacy and safety and establish its role in treatment algorithms.
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Affiliation(s)
- Pablo Martínez-Rodríguez
- Connective Tissue Diseases Unit, Department of Internal Medicine, University Hospital of Salamanca-IBSAL, 37001 Salamanca, Spain; (P.M.-R.); (Á.-P.C.-P.); (N.C.-B.); (M.M.)
- Department of Medicine, Faculty of Medicine, University of Salamanca, 37001 Salamanca, Spain
| | | | - Ángel-P. Crisolino-Pozas
- Connective Tissue Diseases Unit, Department of Internal Medicine, University Hospital of Salamanca-IBSAL, 37001 Salamanca, Spain; (P.M.-R.); (Á.-P.C.-P.); (N.C.-B.); (M.M.)
| | - Noelia Cubino-Boveda
- Connective Tissue Diseases Unit, Department of Internal Medicine, University Hospital of Salamanca-IBSAL, 37001 Salamanca, Spain; (P.M.-R.); (Á.-P.C.-P.); (N.C.-B.); (M.M.)
- Department of Medicine, Faculty of Medicine, University of Salamanca, 37001 Salamanca, Spain
| | - Miriam López-Parra
- Department of Hematology, University Hospital of Salamanca-IBSAL, 37001 Salamanca, Spain;
| | - Miguel Marcos
- Connective Tissue Diseases Unit, Department of Internal Medicine, University Hospital of Salamanca-IBSAL, 37001 Salamanca, Spain; (P.M.-R.); (Á.-P.C.-P.); (N.C.-B.); (M.M.)
- Department of Medicine, Faculty of Medicine, University of Salamanca, 37001 Salamanca, Spain
| | - Antonio-J. Chamorro
- Connective Tissue Diseases Unit, Department of Internal Medicine, University Hospital of Salamanca-IBSAL, 37001 Salamanca, Spain; (P.M.-R.); (Á.-P.C.-P.); (N.C.-B.); (M.M.)
- Department of Medicine, Faculty of Medicine, University of Salamanca, 37001 Salamanca, Spain
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12
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Ichimura Y, Konishi R, Shobo M, Tanaka R, Kubota N, Kayama H, Takeda K, Nomura T, Fujimoto M, Okiyama N. Autoimmunity against melanoma differentiation-associated gene 5 induces interstitial lung disease mimicking dermatomyositis in mice. Proc Natl Acad Sci U S A 2024; 121:e2313070121. [PMID: 38588434 PMCID: PMC11032490 DOI: 10.1073/pnas.2313070121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 02/15/2024] [Indexed: 04/10/2024] Open
Abstract
Anti-melanoma differentiation-associated gene 5 (MDA5) antibody-positive dermatomyositis (DM) is characterized by amyopathic DM with interstitial lung disease (ILD). Patients with anti-MDA5 antibody-associated ILD frequently develop rapidly progression and present high mortality rate in the acute phase. Here, we established a murine model of ILD mediated by autoimmunity against MDA5. Mice immunized with recombinant murine MDA5 whole protein, accompanied with complete Freund's adjuvant once a week for four times, developed MDA5-reactive T cells and anti-MDA5 antibodies. After acute lung injury induced by intranasal administration of polyinosinic-polycytidylic acid [poly (I:C)] mimicking viral infection, the MDA5-immunized mice developed fibrotic ILD representing prolonged respiratory inflammation accompanied by fibrotic changes 2 wk after poly (I:C)-administration, while the control mice had quickly and completely recovered from the respiratory inflammation. Treatment with anti-CD4 depleting antibody, but not anti-CD8 depleting antibody, suppressed the severity of MDA5-induced fibrotic ILD. Upregulation of interleukin (IL)-6 mRNA, which was temporarily observed in poly (I:C)-treated mice, was prolonged in MDA5-immunized mice. Treatment with anti-IL-6 receptor antibody ameliorated the MDA5-induced fibrotic ILD. These results suggested that autoimmunity against MDA5 exacerbates toll-like receptor 3-mediated acute lung injury, and prolongs inflammation resulting in the development of fibrotic ILD. IL-6 may play a key role initiating ILD in this model.
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Affiliation(s)
- Yuki Ichimura
- Department of Dermatology, Graduate School of Medicine and Dental Sciences, Tokyo Medical and Dental University, Tokyo113-8519, Japan
- Division of Rheumatology, Department of Internal Medicine, Tokyo Women’s Medical University, Tokyo162-8666, Japan
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba305-8575, Japan
| | - Risa Konishi
- Department of Dermatology, Graduate School of Medicine and Dental Sciences, Tokyo Medical and Dental University, Tokyo113-8519, Japan
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba305-8575, Japan
| | - Miwako Shobo
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba305-8575, Japan
| | - Ryota Tanaka
- Department of Dermatology, Graduate School of Medicine and Dental Sciences, Tokyo Medical and Dental University, Tokyo113-8519, Japan
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba305-8575, Japan
| | - Noriko Kubota
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba305-8575, Japan
| | - Hisako Kayama
- Division of Bioscience, Institute for Advanced Co-Creation Studies, Osaka University, Osaka565-0871, Japan
- Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Osaka565-0871, Japan
| | - Kiyoshi Takeda
- Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Osaka565-0871, Japan
| | - Toshifumi Nomura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba305-8575, Japan
| | - Manabu Fujimoto
- Department of Dermatology, Graduate School of Medicine, Osaka University, Osaka565-0871, Japan
| | - Naoko Okiyama
- Department of Dermatology, Graduate School of Medicine and Dental Sciences, Tokyo Medical and Dental University, Tokyo113-8519, Japan
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13
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Julien S, Challier I, Malleter M, Jouen F, Drouot L, Boyer O. Immune-Mediated Necrotizing Myopathy (IMNM): A Story of Antibodies. Antibodies (Basel) 2024; 13:12. [PMID: 38390873 PMCID: PMC10885118 DOI: 10.3390/antib13010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 01/10/2024] [Accepted: 02/02/2024] [Indexed: 02/24/2024] Open
Abstract
Immune-mediated necrotizing myopathy (IMNM) is a rare and severe disease that corresponds to a specific entity of idiopathic inflammatory myopathy. Patients with IMNM suffer from proximal muscle weakness, and present high levels of creatine kinase and necrotic myofibers. Anti-Signal Recognition Particle (SRP) and anti-3-hydroxy-3-methylglutaryl-coenzyme A reductase autoantibodies (HMGCR) have recently been identified in two thirds of patients with IMNM and are used as a hallmark of the disease. In this review, we provide a detailed description of these antibodies and the tests used to detect them in the serum of patients. Based on in vitro studies and mouse models of IMNM, we discuss the role of autoantibodies in the pathogenesis of the disease. Finally, in the light of the latest knowledge, we conclude with a review of recent therapeutic approaches in IMNM.
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Affiliation(s)
- Sarah Julien
- INSERM U1234, PAn'THER FOCIS Center of Excellence, Université de Rouen, F-76000 Rouen, France
| | - Inès Challier
- Department of Pharmacy, CHU Rouen, F-76000 Rouen, France
| | - Marine Malleter
- INSERM U1234, PAn'THER FOCIS Center of Excellence, Université de Rouen, F-76000 Rouen, France
| | - Fabienne Jouen
- INSERM U1234, PAn'THER FOCIS Center of Excellence, Université de Rouen, F-76000 Rouen, France
- Department of Immunology and Biotherapy, CHU Rouen, F-76000 Rouen, France
| | - Laurent Drouot
- INSERM U1234, PAn'THER FOCIS Center of Excellence, Université de Rouen, F-76000 Rouen, France
| | - Olivier Boyer
- INSERM U1234, PAn'THER FOCIS Center of Excellence, Université de Rouen, F-76000 Rouen, France
- Department of Immunology and Biotherapy, CHU Rouen, F-76000 Rouen, France
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14
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Connolly CM, Gupta L, Fujimoto M, Machado PM, Paik JJ. Idiopathic inflammatory myopathies: current insights and future frontiers. THE LANCET. RHEUMATOLOGY 2024; 6:e115-e127. [PMID: 38267098 DOI: 10.1016/s2665-9913(23)00322-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 10/24/2023] [Accepted: 11/29/2023] [Indexed: 01/26/2024]
Abstract
Idiopathic inflammatory myopathies are a group of autoimmune diseases with a broad spectrum of clinical presentations, primarily characterised by immune-mediated muscle injury. Until recently, there was little insight into the pathogenesis of idiopathic inflammatory myopathies, which challenged the recognition of the breadth of heterogeneity of this group of diseases as well as the development of new therapeutics. However, the landscape of idiopathic inflammatory myopathies is evolving. In the past decade, advances in diagnostic tools have facilitated an enhanced understanding of the underlying disease mechanisms in idiopathic inflammatory myopathies, enabling the expansion of therapeutic trials. The fields of transcriptomics, prot§eomics, and machine learning offer the potential to gain greater insights into the underlying pathophysiology of idiopathic inflammatory myopathies. Harnessing insights gained from these sophisticated tools could contribute to the identification of differences at a molecular level among patients, accelerating the development of targeted, tailored therapies. Bolstered by the validation and standardisation of robust outcome measures, many promising therapies are in clinical trial development. Although challenges remain, there is great optimism in the field due to the progress in innovative diagnostics, outcome measures, and therapeutic approaches. In this Review, we discuss the expanding landscape of idiopathic inflammatory myopathies as the frontier of precision medicine becomes imminent.
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Affiliation(s)
- Caoilfhionn M Connolly
- Division of Rheumatology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Latika Gupta
- Department of Rheumatology, Royal Wolverhampton Hospitals NHS Trust, Wolverhampton, UK; Division of Musculoskeletal and Dermatological Sciences, Centre for Musculoskeletal Research, School of Biological Sciences, The University of Manchester, Manchester, UK; Department of Rheumatology, City Hospital, Sandwell and West Birmingham Hospitals NHS Trust, Birmingham, UK
| | - Manabu Fujimoto
- Department of Dermatology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Pedro M Machado
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, University College London, London, UK; Centre for Rheumatology, University College London, London, UK; National Institute for Health and Care Research University College London Hospitals Biomedical Research Centre, University College London Hospitals NHS Foundation Trust, London, UK; Department of Rheumatology, Northwick Park Hospital, London North West University Healthcare NHS Trust, London, UK
| | - Julie J Paik
- Division of Rheumatology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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15
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Pinal-Fernandez I, Muñoz-Braceras S, Casal-Dominguez M, Pak K, Torres-Ruiz J, Musai J, Dell’Orso S, Naz F, Islam S, Gutierrez-Cruz G, Cano MD, Matas-Garcia A, Padrosa J, Tobías-Baraja E, Garrabou G, Aldecoa I, Espinosa G, Simeon-Aznar CP, Guillen-Del-Castillo A, Gil-Vila A, Trallero-Araguas E, Christopher-Stine L, Lloyd TE, Liewluck T, Naddaf E, Stenzel W, Greenberg SA, Grau JM, Selva-O’Callaghan A, Milisenda JC, Mammen AL. Pathogenic autoantibody internalization in myositis. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.01.15.24301339. [PMID: 38313303 PMCID: PMC10836124 DOI: 10.1101/2024.01.15.24301339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
Objectives Myositis is a heterogeneous family of autoimmune muscle diseases. As myositis autoantibodies recognize intracellular proteins, their role in disease pathogenesis has been unclear. This study aimed to determine whether myositis autoantibodies reach their autoantigen targets within muscle cells and disrupt the normal function of these proteins. Methods Confocal immunofluorescence microscopy was used to localize antibodies and other proteins of interest in myositis muscle biopsies. Bulk RNA sequencing was used to study the transcriptomic profiles of 668 samples from patients with myositis, disease controls, and healthy controls. Antibodies from myositis patients were introduced into cultured myoblasts by electroporation and the transcriptomic profiles of the treated myoblasts were studied by bulk RNA sequencing. Results In patients with myositis autoantibodies, antibodies accumulated inside myofibers in the same subcellular compartment as the autoantigen. Each autoantibody was associated with effects consistent with dysfunction of its autoantigen, such as the derepression of genes normally repressed by Mi2/NuRD in patients with anti-Mi2 autoantibodies, the accumulation of RNAs degraded by the nuclear RNA exosome complex in patients with anti-PM/Scl autoantibodies targeting this complex, and the accumulation of lipids within myofibers of anti-HMGCR-positive patients. Internalization of patient immunoglobulin into cultured myoblasts recapitulated the transcriptomic phenotypes observed in human disease, including the derepression of Mi2/NuRD-regulated genes in anti-Mi2-positive dermatomyositis and the increased expression of genes normally degraded by the nuclear RNA exosome complex in anti-PM/Scl-positive myositis. Conclusions In myositis, autoantibodies are internalized into muscle fibers, disrupt the biological function of their autoantigen, and mediate the pathophysiology of the disease.
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Affiliation(s)
- Iago Pinal-Fernandez
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Sandra Muñoz-Braceras
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Maria Casal-Dominguez
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Katherine Pak
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Jiram Torres-Ruiz
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
- Immunology and Rheumatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Jon Musai
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Stefania Dell’Orso
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Faiza Naz
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Shamima Islam
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Gustavo Gutierrez-Cruz
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Maria Dolores Cano
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
| | - Ana Matas-Garcia
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | | | - Esther Tobías-Baraja
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | - Gloria Garrabou
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | - Iban Aldecoa
- Pathology, Neurological Tissue Bank. Hospital Clinic of Barcelona-CDB-IDIBAPS/FCRB-University of Barcelona, Barcelona, Spain
| | - Gerard Espinosa
- Barcelona University, Barcelona, Spain
- Department of Autoimmune Diseases, Reference Centre for Systemic Autoimmune Diseases (UEC/CSUR) of the Catalan and Spanish Health Systems-Member of ERN-ReCONNET, Hospital Clinic, Barcelona, Spain
| | - Carmen Pilar Simeon-Aznar
- Systemic Autoimmune Disease Section, Vall d’Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Alfredo Guillen-Del-Castillo
- Systemic Autoimmune Disease Section, Vall d’Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Albert Gil-Vila
- Systemic Autoimmune Disease Section, Vall d’Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Ernesto Trallero-Araguas
- Systemic Autoimmune Disease Section, Vall d’Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Lisa Christopher-Stine
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Thomas E. Lloyd
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Teerin Liewluck
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Elie Naddaf
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Werner Stenzel
- Department of Neuropathology, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Berlin, Germany
| | - Steven A. Greenberg
- Department of Neurology, Brigham and Women’s Hospital and Boston Children’s Hospital, Harvard Medical School, MA, USA
| | - Josep Maria Grau
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | - Albert Selva-O’Callaghan
- Systemic Autoimmune Disease Section, Vall d’Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Jose C. Milisenda
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER and IDIBAPS, Barcelona, Spain
| | - Andrew L. Mammen
- Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Autonomous University of Barcelona, Barcelona, Spain
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16
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Sakai K, Takahashi M, Ito Y, Yamada S, Ito T, Higuchi Y, Kameda S. Thrombotic microangiopathy in a patient with anti-signal recognition particle antibody-positive immune-mediated necrotizing myopathy. Int J Rheum Dis 2024; 27:e14942. [PMID: 37828793 DOI: 10.1111/1756-185x.14942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/20/2023] [Accepted: 10/04/2023] [Indexed: 10/14/2023]
Abstract
We describe the case of a 61-year-old woman with anti-signal recognition particle (SRP) antibody-positive immune-mediated necrotizing myopathy (IMNM) who exhibited biopsy-confirmed thrombotic microangiopathy (TMA). The patient developed proximal-dominant muscle weakness and was diagnosed with anti-SRP antibody-positive IMNM based on muscle biopsy results and serological examination. A high-dose corticosteroid prescription was initiated, followed by intravenous methylprednisolone and intravenous immunoglobulin therapy (IVIg). The patient showed IVIg-induced hemolytic anemia with preserved ADAMTS13 activity. Transient oral tacrolimus administration was initiated. Approximately 8 weeks after admission, the serum creatinine levels gradually increased. Renal histological examination revealed TMA, including ischemic changes in the renal tubules, stenosis, and occlusion of the interlobular arteries with fibrinoid necrosis of the afferent arteriolar walls. The arteriolar walls demonstrated an accumulation of C1q and C3c. Myofiber damage in patients with IMNM accounts for the activation of the classical pathway of the complement cascade in the sarcolemma due to antibody deposition. Additionally, a membrane attack complex is observed on capillaries in the muscle tissues of patients with anti-SRP antibody-positive IMNM. Although drug-induced pathomechanisms, such as IVIg and tacrolimus, can trigger the development of TMA, we suggest that the presence of serum anti-SRP antibodies would be implicated in complement-associated kidney vascular damage.
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Affiliation(s)
- Kenji Sakai
- Department of Neurology, Joetsu General Hospital, Joetsu, Japan
| | - Megumi Takahashi
- Department of Nephrology, Joetsu General Hospital, Joetsu, Japan
| | - Yumi Ito
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Shota Yamada
- Department of Neurology, Joetsu General Hospital, Joetsu, Japan
| | - Toru Ito
- Department of Nephrology, Joetsu General Hospital, Joetsu, Japan
| | - Yo Higuchi
- Department of Neurology, Joetsu General Hospital, Joetsu, Japan
| | - Shigemi Kameda
- Department of Nephrology, Joetsu General Hospital, Joetsu, Japan
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17
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Honda M, Shimizu F, Sato R, Nakamori M. Contribution of Complement, Microangiopathy and Inflammation in Idiopathic Inflammatory Myopathies. J Neuromuscul Dis 2024; 11:5-16. [PMID: 38143369 PMCID: PMC10789353 DOI: 10.3233/jnd-230168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2023] [Indexed: 12/26/2023]
Abstract
PURPOSE OF REVIEW Idiopathic inflammatory myopathies (IIMs) are a heterogeneous group characterized by muscle weakness and skin symptoms and are categorized into six subtypes: dermatomyositis (DM), polymyositis (PM), anti-synthetase syndrome (ASS), immune-mediated myopathy (IMNM), inclusion body myopathy (IBM), and overlap myositis. Myositis-specific autoantibodies were detected for the diagnosis and classification of IIM. This review highlights the pathogenic contributions of the complement system, microangiopathy, and inflammation in IIM. RECENT FINDINGS Deposition of complement around capillaries and/or the sarcolemma was observed in muscle biopsy specimens from patients with DM, ASS, and IMNM, suggesting the pathomechanism of complement-dependent muscle and endothelial cell injury. A recent study using human muscle microvascular endothelial cells showed that Jo-1 antibodies from ASS induce complement-dependent cellular cytotoxicity in vitro. Based on both clinical and pathological observations, antibody- and complement-mediated microangiopathy may contribute to the development of DM and anti-Jo-1 ASS. Juvenile DM is characterized by the loss of capillaries, perivascular inflammation, and small-vessel angiopathies, which may be related to microinfarction and perifascicular atrophy. Several serum biomarkers that reflect the IFN1 signature and microangiopathy are elevated in patients with DM. The pathological observation of myxovirus resistance protein A (MxA), which suggests a type 1 interferon (IFN1) signature in DM, supports the diagnosis and further understanding of the pathomechanism of IIM. A recent report showed that an increase in triggering receptor expressed on myeloid cells (TREM-1) around perimysial blood vessels and muscles in patients with IIM plays a role in triggering inflammation and promoting the migration of inflammatory cells by secreting proinflammatory cytokines, such as tumor necrosis factor α. SUMMARY The deposition of complement in muscles and capillaries is a characteristic feature of DM, ASS, and IMNM. Microangiopathy plays a pathogenic role in DM, possibly resulting in perifascicular atrophy. Further understanding of the detailed pathomechanism regarding complement, microangiopathy, and inflammation may lead to novel therapeutic approaches for IIM.
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Affiliation(s)
- Masaya Honda
- Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Fumitaka Shimizu
- Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Ryota Sato
- Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Masayuki Nakamori
- Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
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Tsuzuki Wada T, Yokota K, Inayoshi F, Sakai S, Okumura N, Matsuda M, Osawa I, Araki Y, Funakubo Asanuma Y, Akiyama Y, Mimura T. New-onset Immune-mediated Necrotizing Myopathy and Trigeminal Neuropathy after SARS-CoV-2 mRNA Vaccination in a Patient with Rheumatoid Arthritis and Sjögren's Syndrome. Intern Med 2023; 62:3699-3706. [PMID: 37839879 PMCID: PMC10781545 DOI: 10.2169/internalmedicine.2551-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 08/30/2023] [Indexed: 10/17/2023] Open
Abstract
We present the case of a 42-year-old woman with rheumatoid arthritis and Sjögren's syndrome treated with adalimumab who developed immune-mediated necrotizing myopathy (IMNM) and trigeminal neuropathy after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) mRNA vaccination. Trigeminal neuralgia and elevated serum creatine kinase levels emerged 12 days post-vaccination, followed by myalgia in the femoral muscles. IMNM was histologically diagnosed. The pathogenesis may involve molecular mimicry between the SARS-CoV-2 spike glycoprotein and autologous tissues triggered by vaccination. This case emphasizes the association between SARS-CoV-2 vaccination, tumor necrosis factor inhibitor, IMNM, and trigeminal neuropathy, as well as the importance of monitoring immune-mediated adverse events following SARS-CoV-2 vaccination in patients with autoimmune disease.
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Affiliation(s)
- Takuma Tsuzuki Wada
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
| | - Kazuhiro Yokota
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
| | - Fumito Inayoshi
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
| | - Sakon Sakai
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
| | - Nobuhito Okumura
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
| | - Mayumi Matsuda
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
| | - Iichiro Osawa
- Department of Radiology, Saitama Medical University Hospital, Japan
| | - Yasuto Araki
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
| | - Yu Funakubo Asanuma
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
| | - Yuji Akiyama
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
| | - Toshihide Mimura
- Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan
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Julien S, van der Woning B, De Ceuninck L, Briand E, Jaworski T, Roussel G, Zoubaïri R, Allenbach Y, Benveniste O, Drouot L, Boyer O. Efgartigimod restores muscle function in a humanized mouse model of immune-mediated necrotizing myopathy. Rheumatology (Oxford) 2023; 62:4006-4011. [PMID: 37335864 DOI: 10.1093/rheumatology/kead298] [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: 01/11/2023] [Revised: 04/25/2023] [Accepted: 06/10/2023] [Indexed: 06/21/2023] Open
Abstract
OBJECTIVE Immune-mediated necrotizing myopathies (IMNMs) are severe forms of myositis often associated with pathogenic anti-3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR) autoantibodies (aAbs). Efgartigimod is an engineered human IgG1 Fc fragment that antagonizes the neonatal Fc receptor (FcRn), thereby preventing recycling and promoting lysosomal degradation of IgG, including aAbs. We evaluated the therapeutic effects of IgG reduction by efgartigimod in a humanized murine model of IMNM. METHODS Disease was induced in C5-deficient (C5def) or Rag2-deficient (Rag2-/-) mice receiving co-injections of anti-HMGCR+ IgG from an IMNM patient and human complement. C5def mice were treated in a preventive setting with s.c. injections of efgartigimod and Rag2-/- mice in a curative setting after disease was induced by anti-HMGCR+ IgG injections. Anti-HMGCR aAbs levels were monitored in mouse serum and muscle tissue. Histological analysis was performed on muscle sections. Muscle force was assessed by grip test or measurement of gastrocnemius strength upon electrostimulation. RESULTS Administration of efgartigimod rapidly reduced total IgG levels, including the level of pathogenic anti-HMGCR aAbs, in both serum (P < 0.0001) and muscle (P < 0.001). In the preventive setting, efgartigimod prevented myofibre necrosis (P < 0.05), thus precluding loss of muscle strength (P < 0.05). In the therapeutic setting, efgartigimod prevented further necrosis and allowed muscle fibre regeneration (P < 0.05). Hence, muscle strength returned to normal (P < 0.01). CONCLUSION Efgartigimod reduces circulating IgG levels, including pathogenic anti-HMGCR+ IgG aAbs, in a humanized mouse model of IMNM, preventing further necrosis and allowing muscle fibre regeneration. These results support investigating the therapeutic efficacy of efgartigimod through a clinical trial in IMNM patients.
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Affiliation(s)
- Sarah Julien
- Univ Rouen Normandie, Inserm UMR1234, FOCIS Center of Excellence PAn'THER, Rouen, France
| | | | | | - Emma Briand
- Univ Rouen Normandie, Inserm UMR1234, FOCIS Center of Excellence PAn'THER, Rouen, France
| | - Thara Jaworski
- Univ Rouen Normandie, Inserm UMR1234, FOCIS Center of Excellence PAn'THER, Rouen, France
| | - Gaëlle Roussel
- Univ Rouen Normandie, Inserm UMR1234, FOCIS Center of Excellence PAn'THER, Rouen, France
| | - Rachid Zoubaïri
- Univ Rouen Normandie, Inserm UMR1234, FOCIS Center of Excellence PAn'THER, Rouen, France
| | - Yves Allenbach
- Department of Internal Medicine and Clinical Immunology, AP-HP, Pitié-Salpêtrière University Hospital, Paris, France
| | - Olivier Benveniste
- Department of Internal Medicine and Clinical Immunology, AP-HP, Pitié-Salpêtrière University Hospital, Paris, France
| | - Laurent Drouot
- Univ Rouen Normandie, Inserm UMR1234, FOCIS Center of Excellence PAn'THER, Rouen, France
| | - Olivier Boyer
- Univ Rouen Normandie, Inserm UMR1234, FOCIS Center of Excellence PAn'THER, Rouen, France
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Cappelletti C, Brugnoni R, Bonanno S, Andreetta F, Salerno F, Canioni E, Vattemi GNA, Tonin P, Mantegazza R, Maggi L. Toll-like receptors and IL-7 as potential biomarkers for immune-mediated necrotizing myopathies. Eur J Immunol 2023; 53:e2250326. [PMID: 37562045 DOI: 10.1002/eji.202250326] [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: 12/10/2022] [Revised: 06/05/2023] [Accepted: 08/09/2023] [Indexed: 08/12/2023]
Abstract
We aimed to verify whether the immune system may represent a source of potential biomarkers for the stratification of immune-mediated necrotizing myopathies (IMNMs) subtypes. A group of 22 patients diagnosed with IMNM [7 with autoantibodies against signal recognition particle (SRP) and 15 against 3-hydroxy-3-methyl-glutaryl-coenzyme A reductase (HMGCR)] and 12 controls were included. A significant preponderance of M1 macrophages was observed in both SRP+ and HMGCR+ muscle samples (p < 0.0001 in SRP+ and p = 0.0316 for HMGCR+ ), with higher values for SRP+ (p = 0.01). Despite the significant increase observed in the expression of TLR4 and all endosomal Toll-like receptors (TLRs) at protein level in IMNM muscle tissue, only TLR7 has been shown considerably upregulated compared to controls at transcript level (p = 0.0026), whereas TLR9 was even decreased (p = 0.0223). Within IMNM subgroups, TLR4 (p = 0.0116) mRNA was significantly increased in SRP+ compared to HMGCR+ patients. Within IMNM group, only IL-7 was differentially expressed between SRP+ and HMGCR+ patients, with higher values in SRP+ patients (p = 0.0468). Overall, innate immunity represents a key player in pathological mechanisms of IMNM. TLR4 and the inflammatory cytokine IL-7 represent potential immune biomarkers able to differentiate between SRP+ and HMGCR+ patients.
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Affiliation(s)
- Cristina Cappelletti
- U.O. Neurology IV, Neuroimmunology and Neuromuscular Diseases Unit., Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Raffaella Brugnoni
- U.O. Neurology IV, Neuroimmunology and Neuromuscular Diseases Unit., Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Silvia Bonanno
- U.O. Neurology IV, Neuroimmunology and Neuromuscular Diseases Unit., Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Francesca Andreetta
- U.O. Neurology IV, Neuroimmunology and Neuromuscular Diseases Unit., Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Franco Salerno
- U.O. Neurology IV, Neuroimmunology and Neuromuscular Diseases Unit., Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Eleonora Canioni
- U.O. Neurology IV, Neuroimmunology and Neuromuscular Diseases Unit., Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Gaetano Nicola Alfio Vattemi
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Clinical Neurology, University of Verona, Verona, Italy
| | - Paola Tonin
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Clinical Neurology, University of Verona, Verona, Italy
| | - Renato Mantegazza
- U.O. Neurology IV, Neuroimmunology and Neuromuscular Diseases Unit., Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Lorenzo Maggi
- U.O. Neurology IV, Neuroimmunology and Neuromuscular Diseases Unit., Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
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Reay DP, Tabib T, Wang Y, Oriss TB, Young NA, Lafyatis RA, Jarjour WN, Clemens PR, Ascherman DP. Antigen-driven T cell-macrophage interactions mediate the interface between innate and adaptive immunity in histidyl-tRNA synthetase-induced myositis. Front Immunol 2023; 14:1238221. [PMID: 37809058 PMCID: PMC10556668 DOI: 10.3389/fimmu.2023.1238221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 09/04/2023] [Indexed: 10/10/2023] Open
Abstract
Introduction Previous work in humans has demonstrated that both innate and adaptive immune signaling pathways contribute to the pathogenesis of idiopathic inflammatory myopathy (IIM), a systemic autoimmune disease targeting muscle as well as extra-muscular organs. To better define interactive signaling networks in IIM, we characterized the cellular phenotype and transcriptomic profiles of muscle-infiltrating cells in our established murine model of histidyl-tRNA synthetase (HRS)-induced myositis. Methods Myositis was induced in wild type (WT) and various congenic/mutant strains of C57BL/6 mice through intramuscular immunization with recombinant HRS. Histopathological, immunohistochemical, flow cytometric, and transcriptomic assessments were used to characterize the functional relationship between muscle-infiltrating cell populations in these strains lacking different components of innate and/or adaptive immune signaling. Results RAG1 KO mice developed markedly reduced muscle inflammation relative to WT mice, demonstrating a key requirement for T cells in driving HRS-induced myositis. While the reduction of mononuclear cell infiltrates in CD4-Cre.MyD88fl/fl conditional knockout mice and OT-II TCR transgenic mice highlighted roles for both innate and TCR-mediated/adaptive immune signaling in T cells, diminished inflammation in Lyz2-Cre.MyD88fl/fl conditional knockout mice underscored the importance of macrophage/myeloid cell populations in supporting T cell infiltration. Single cell RNA sequencing-based clustering of muscle-infiltrating subpopulations and associated pathway analyses showed that perturbations of T cell signaling/function alter the distribution and phenotype of macrophages, fibroblasts, and other non-lymphoid cell populations contributing to HRS-induced myositis. Discussion Overall, HRS-induced myositis reflects the complex interplay between multiple cell types that collectively drive a TH1-predominant, pro-inflammatory tissue phenotype requiring antigen-mediated activation of both MyD88- and TCR-dependent T cell signaling pathways.
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Affiliation(s)
- Daniel P Reay
- Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Tracy Tabib
- Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Ying Wang
- Department of Medicine, University of Miami School of Medicine, Miami, FL, United States
| | - Timothy B Oriss
- Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Nicholas A Young
- Department of Medicine, Ohio State University School of Medicine, Columbus, OH, United States
| | - Robert A Lafyatis
- Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Wael N Jarjour
- Department of Medicine, Ohio State University School of Medicine, Columbus, OH, United States
| | - Paula R Clemens
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Dana P Ascherman
- Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
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22
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Gandolfi S, Pileyre B, Drouot L, Dubus I, Auquit-Auckbur I, Martinet J. Stromal vascular fraction in the treatment of myositis. Cell Death Discov 2023; 9:346. [PMID: 37726262 PMCID: PMC10509179 DOI: 10.1038/s41420-023-01605-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 08/01/2023] [Accepted: 08/14/2023] [Indexed: 09/21/2023] Open
Abstract
Muscle regeneration is a physiological process that converts satellite cells into mature myotubes under the influence of an inflammatory environment progressively replaced by an anti-inflammatory environment, with precise crosstalk between immune and muscular cells. If the succession of these phases is disturbed, the immune system can sometimes become auto-reactive, leading to chronic muscular inflammatory diseases, such as myositis. The triggers of these autoimmune myopathies remain mostly unknown, but the main mechanisms of pathogenesis are partially understood. They involve chronic inflammation, which could be associated with an auto-reactive immune response, and gradually with a decrease in the regenerative capacities of the muscle, leading to its degeneration, fibrosis and vascular architecture deterioration. Immunosuppressive treatments can block the first part of the process, but sometimes muscle remains weakened, or even still deteriorates, due to the exhaustion of its capacities. For patients refractory to immunosuppressive therapies, mesenchymal stem cells have shown interesting effects but their use is limited by their availability. Stromal vascular fraction, which can easily be extracted from adipose tissue, has shown good tolerance and possible therapeutic benefits in several degenerative and autoimmune diseases. However, despite the increasing use of stromal vascular fraction, the therapeutically active components within this heterogeneous cellular product are ill-defined and the mechanisms by which this therapy might be active remain insufficiently understood. We review herein the current knowledge on the mechanisms of action of stromal vascular fraction and hypothesise on how it could potentially respond to some of the unmet treatment needs of refractory myositis.
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Affiliation(s)
- S Gandolfi
- Univ Rouen Normandie, INSERM U1234, FOCIS Center of Excellence PAn'THER, F-76000, Rouen, France
- Toulouse University Hospital, Department of Plastic and Reconstructive Surgery, F-31000, Toulouse, France
| | - B Pileyre
- Univ Rouen Normandie, INSERM U1234, FOCIS Center of Excellence PAn'THER, F-76000, Rouen, France.
- Centre Henri Becquerel, Department of Pharmacy, F-76000, Rouen, France.
| | - L Drouot
- Univ Rouen Normandie, INSERM U1234, FOCIS Center of Excellence PAn'THER, F-76000, Rouen, France
| | - I Dubus
- Univ Rouen Normandie, INSERM U1234, FOCIS Center of Excellence PAn'THER, F-76000, Rouen, France
| | - I Auquit-Auckbur
- Univ Rouen Normandie, INSERM U1234, FOCIS Center of Excellence PAn'THER, CHU Rouen, Department of Plastic, Reconstructive and Hand Surgery, F-76000, Rouen, France
| | - J Martinet
- Univ Rouen Normandie, INSERM U1234, FOCIS Center of Excellence PAn'THER, CHU Rouen, Department of Immunology and Biotherapy, F-76000, Rouen, France
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Li W, Deng C, Yang H, Tian X, Chen L, Liu Q, Gao C, Lu X, Wang G, Peng Q. Upregulation of the CD155-CD226 Axis Is Associated With Muscle Inflammation and Disease Severity in Idiopathic Inflammatory Myopathies. NEUROLOGY(R) NEUROIMMUNOLOGY & NEUROINFLAMMATION 2023; 10:e200143. [PMID: 37491355 PMCID: PMC10368451 DOI: 10.1212/nxi.0000000000200143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 06/01/2023] [Indexed: 07/27/2023]
Abstract
BACKGROUND AND OBJECTIVES The CD155-CD226/T-cell Ig and immunoreceptor tyrosine-based inhibitory motif (ITIM) domain (TIGIT) pathway plays a critical role in regulating T-cell responses and is being targeted clinically. However, research on the role of this pathway in autoimmune diseases is limited. This study aimed to investigate the expression and tissue-specific roles of CD155-CD226/TIGIT pathway molecules in the inflamed muscles of patients with idiopathic inflammatory myopathies (IIMs). METHODS Immunohistochemistry, Western blot analysis, and polychromatic immunofluorescence staining were performed to examine the expression of CD155, CD226, and TIGIT in skeletal muscle biopsies from 30 patients with dermatomyositis (DM), 10 patients with amyopathic DM (ADM), 20 patients with immune-mediated necrotizing myopathy (IMNM), 5 patients with dysferlinopathy, and 4 healthy controls. Flow cytometry analysis was used to analyze the functions of T cells with different phenotypes. RESULTS Strong expression of CD155 was observed in patients with DM and IMNM, while its expression was largely negative in those with ADM and dysferlinopathy and healthy controls. The costimulatory receptor CD226 was highly expressed on muscle-infiltrating cells, while the coinhibitory receptor TIGIT was expressed at low levels. These infiltrating CD226+ cells were mainly activated effector T cells that localized adjacent to CD155-expressing myofibers, but were faintly detectable within the muscle fascicles lacking CD155. A strong positive correlation between CD155 and CD226 expression scores was also observed. Polychromatic immunofluorescence staining revealed that CD155+ muscle cells coexpressed major histocompatibility complex classes I and II, and tumor necrosis factor alpha expression was detected in CD226+ T cells at their close sites with the myofibers. Furthermore, the expression levels of CD155 and CD226 showed a positive correlation with creatine kinase, lactate dehydrogenase, and the muscle histopathology damage scores and an inverse correlation with the Manual Muscle Testing-8 scores. In addition, CD155 and CD226 expressions were significantly decreased in representative patients who achieved remission posttreatment. DISCUSSION These findings demonstrate that the CD155-CD226 axis is highly activated in inflamed muscle tissues of patients with IIM and is associated with muscle disease severity. Our data uncover the immunopathogenic role of the axis in the pathology of IIMs.
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Affiliation(s)
- Wenli Li
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing.
| | - Chuiwen Deng
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing
| | - Hanbo Yang
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing
| | - Xiaolan Tian
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing
| | - Lida Chen
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing
| | - Qingyan Liu
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing
| | - Chang Gao
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing
| | - Xin Lu
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing
| | - Guochun Wang
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing
| | - Qinglin Peng
- From the Department of Rheumatology (W.L., H.Y., X.T., Q.L., C.G., X.L., G.W., Q.P.), Key Myositis Laboratories, China-Japan Friendship Hospital; Department of Rheumatology and Clinical Immunology (C.D.), Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; and Department of Blood Transfusion (L.C.), China-Japan Friendship Hospital, Beijing.
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Shi Y, Zhang H, Qiu Z, Chen Y, Su X, Chi H, Feng T, Sun Y, Liu H, Cheng X, Ye J, Shi H, Hu Q, Zhou Z, Meng J, Teng J, Yang C, Su Y, Jin W. Value of the HFA-PEFF diagnostic algorithms for heart failure with preserved ejection fraction to the inflammatory myopathy population. Arthritis Res Ther 2023; 25:141. [PMID: 37542301 PMCID: PMC10401815 DOI: 10.1186/s13075-023-03131-6] [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: 06/07/2023] [Accepted: 07/29/2023] [Indexed: 08/06/2023] Open
Abstract
OBJECTIVES The HFA-PEFF score has been validated to hold great diagnostic and prognostic utility for heart failure with preserved ejection fraction (HFpEF). Idiopathic inflammatory myopathy (IIM) is recognized as one of the potential etiologies underlying HFpEF. Here, we intended to investigate the real prevalence of HFpEF in IIM via the HFA-PEFF score and explore the prognostic value of this score. METHODS Two hundred twenty IIM patients were enrolled for assessment. The cohort was divided into low, intermediate and high tertiles of the HFA-PEFF score. Spearman's correlation analysis was used to explore the association between the score and disease activity. Chi-square test was applied to investigate the distribution discrepancy of HFA-PEFF tertiles among patients with different myositis-specific antibodies (MSAs) or myositis-associated antibodies (MAAs). Univariate and multivariate ordinal regression analyses were performed to screen risk factors for high HFA-PEFF scores. Survival curves were obtained using the Kaplan-Meier method and log-rank tests. RESULTS In total, 79 (35.9%), 107 (48.6%) and 34 (15.5%) patients were rated low, intermediate and high probability of HFpEF, respectively. The HFA-PEFF score correlated well with disease activity. Patients with positive AMA-M2 scored higher in the HFA-PEFF score (p = 0.011). During follow-up, patients with positive AMA-M2 or anti-SRP antibody developed an inclination towards concentric hypertrophy on echocardiography. Additionally, palpitation symptom, AMA-M2 positivity and elevated serum levels of LDH, cTnI were independent risk factors for high HFA-PEFF scores. Finally, a high-tertile HFA-PEFF score was related to lower overall survival rate (p < 0.001). Patients with positive AMA-M2 had poorer outcomes (p = 0.002). CONCLUSION HFpEF was prevailing in IIM patients according to the HFA-PEFF score. The HFA-PEFF score correlated well with disease activity and held significant prognostic value. Patients with AMA-M2 antibody were prone to have poor outcomes.
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Affiliation(s)
- Yunjing Shi
- Department of Cardiovascular Medicine, Heart Failure Center, Ruijin Hospital, Ruijin Hospital Lu Wan Branch, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, 149 S. Chongqing Road, Shanghai, 200025, People's Republic of China
| | - Hao Zhang
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Zeping Qiu
- Department of Cardiovascular Medicine, Heart Failure Center, Ruijin Hospital, Ruijin Hospital Lu Wan Branch, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, 149 S. Chongqing Road, Shanghai, 200025, People's Republic of China
| | - Yanjia Chen
- Department of Cardiovascular Medicine, Heart Failure Center, Ruijin Hospital, Ruijin Hospital Lu Wan Branch, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, 149 S. Chongqing Road, Shanghai, 200025, People's Republic of China
| | - Xiuxiu Su
- Department of Cardiovascular Medicine, Heart Failure Center, Ruijin Hospital, Ruijin Hospital Lu Wan Branch, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, 149 S. Chongqing Road, Shanghai, 200025, People's Republic of China
| | - Huihui Chi
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Tienan Feng
- Clinical Research Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yue Sun
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Honglei Liu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Xiaobing Cheng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Junna Ye
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Hui Shi
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Qiongyi Hu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Zhuochao Zhou
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Jianfen Meng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Jialin Teng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Chengde Yang
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China
| | - Yutong Su
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, People's Republic of China.
| | - Wei Jin
- Department of Cardiovascular Medicine, Heart Failure Center, Ruijin Hospital, Ruijin Hospital Lu Wan Branch, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, 149 S. Chongqing Road, Shanghai, 200025, People's Republic of China.
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Pinal-Fernandez I, Milisenda JC, Pak K, Muñoz-Braceras S, Casal-Dominguez M, Torres-Ruiz J, Dell'Orso S, Naz F, Gutierrez-Cruz G, Duque-Jaimez Y, Matas-Garcia A, Padrosa J, Garcia-Garcia FJ, Guitart-Mampel M, Garrabou G, Trallero-Araguás E, Walitt B, Paik JJ, Albayda J, Christopher-Stine L, Lloyd TE, Grau-Junyent JM, Selva-O'Callaghan A, Mammen AL. Transcriptional derepression of CHD4/NuRD-regulated genes in the muscle of patients with dermatomyositis and anti-Mi2 autoantibodies. Ann Rheum Dis 2023; 82:1091-1097. [PMID: 37130727 DOI: 10.1136/ard-2023-223873] [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: 01/09/2023] [Accepted: 04/18/2023] [Indexed: 05/04/2023]
Abstract
OBJECTIVES Myositis is a heterogeneous family of diseases including dermatomyositis (DM), immune-mediated necrotising myopathy (IMNM), antisynthetase syndrome (AS) and inclusion body myositis (IBM). Myositis-specific autoantibodies define different subtypes of myositis. For example, patients with anti-Mi2 autoantibodies targeting the chromodomain helicase DNA-binding protein 4 (CHD4)/NuRD complex (a transcriptional repressor) have more severe muscle disease than other DM patients. This study aimed to define the transcriptional profile of muscle biopsies from anti-Mi2-positive DM patients. METHODS RNA sequencing was performed on muscle biopsies (n=171) from patients with anti-Mi2-positive DM (n=18), DM without anti-Mi2 autoantibodies (n=32), AS (n=18), IMNM (n=54) and IBM (n=16) as well as 33 normal muscle biopsies. Genes specifically upregulated in anti-Mi2-positive DM were identified. Muscle biopsies were stained for human immunoglobulin and protein products corresponding to genes specifically upregulated in anti-Mi2-positive muscle biopsies. RESULTS A set of 135 genes, including SCRT1 and MADCAM1, was specifically overexpressed in anti-Mi2-positive DM muscle. This set was enriched for CHD4/NuRD-regulated genes and included genes that are not otherwise expressed in skeletal muscle. The expression levels of these genes correlated with anti-Mi2 autoantibody titres, markers of disease activity and with the other members of the gene set. In anti-Mi2-positive muscle biopsies, immunoglobulin was localised to the myonuclei, MAdCAM-1 protein was present in the cytoplasm of perifascicular fibres, and SCRT1 protein was localised to myofibre nuclei. CONCLUSIONS Based on these findings, we hypothesise that anti-Mi2 autoantibodies could exert a pathogenic effect by entering damaged myofibres, inhibiting the CHD4/NuRD complex, and subsequently derepressing the unique set of genes defined in this study.
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Affiliation(s)
- Iago Pinal-Fernandez
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jose Cesar Milisenda
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER, Barcelona, Spain
| | - Katherine Pak
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Sandra Muñoz-Braceras
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Maria Casal-Dominguez
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Jiram Torres-Ruiz
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
- Immunology and Rheumatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Stefania Dell'Orso
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Faiza Naz
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Gustavo Gutierrez-Cruz
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Yaiza Duque-Jaimez
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
| | - Ana Matas-Garcia
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER, Barcelona, Spain
| | | | - Francesc J Garcia-Garcia
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER, Barcelona, Spain
| | - Mariona Guitart-Mampel
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER, Barcelona, Spain
| | - Gloria Garrabou
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER, Barcelona, Spain
| | | | - Brian Walitt
- National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - Julie J Paik
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jemima Albayda
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Lisa Christopher-Stine
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Thomas E Lloyd
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Josep Maria Grau-Junyent
- Muscle Research Unit, Internal Medicine Service, Hospital Clinic, Barcelona, Spain
- Barcelona University, Barcelona, Spain
- CIBERER, Barcelona, Spain
| | - Albert Selva-O'Callaghan
- Systemic Autoimmune Disease Unit, Vall d'Hebron Institute of Research, Barcelona, Spain
- Autonomous University of Barcelona, Barcelona, Spain
| | - Andrew Lee Mammen
- Muscle Disease Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Kamiya M, Kimura N, Umezawa N, Hasegawa H, Yasuda S. Muscle fiber necroptosis in pathophysiology of idiopathic inflammatory myopathies and its potential as target of novel treatment strategy. Front Immunol 2023; 14:1191815. [PMID: 37483632 PMCID: PMC10361824 DOI: 10.3389/fimmu.2023.1191815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 06/22/2023] [Indexed: 07/25/2023] Open
Abstract
Idiopathic inflammatory myopathies (IIMs), which are a group of chronic and diverse inflammatory diseases, are primarily characterized by weakness in the proximal muscles that progressively leads to persistent disability. Current treatments of IIMs depend on nonspecific immunosuppressive agents (including glucocorticoids and immunosuppressants). However, these therapies sometimes fail to regulate muscle inflammation, and some patients suffer from infectious diseases and other adverse effects related to the treatment. Furthermore, even after inflammation has subsided, muscle weakness persists in a significant proportion of the patients. Therefore, the elucidation of pathophysiology of IIMs and development of a better therapeutic strategy that not only alleviates muscle inflammation but also improves muscle weakness without increment of opportunistic infection is awaited. Muscle fiber death, which has been formerly postulated as "necrosis", is a key histological feature of all subtypes of IIMs, however, its detailed mechanisms and contribution to the pathophysiology remained to be elucidated. Recent studies have revealed that muscle fibers of IIMs undergo necroptosis, a newly recognized form of regulated cell death, and promote muscle inflammation and dysfunction through releasing inflammatory mediators such as damage-associated molecular patterns (DAMPs). The research on murine model of polymyositis, a subtype of IIM, revealed that the inhibition of necroptosis or HMGB1, one of major DAMPs released from muscle fibers undergoing necroptosis, ameliorated muscle inflammation and recovered muscle weakness. Furthermore, not only the necroptosis-associated molecules but also PGAM5, a mitochondrial protein, and reactive oxygen species have been shown to be involved in muscle fiber necroptosis, indicating the multiple target candidates for the treatment of IIMs acting through necroptosis regulation. This article overviews the research on muscle injury mechanisms in IIMs focusing on the contribution of necroptosis in their pathophysiology and discusses the potential treatment strategy targeting muscle fiber necroptosis.
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Gudipati A, Rifat S, Uppin M, Jabeen A, Mathukumalli NL, Yareeda S, Kayidhi S, Pyal A, Dhamne M, Reddy YM. Comparison of Muscle Biopsy Features with Myositis Autoantibodies in Inflammatory Myopathies: A Pilot Experience. Ann Indian Acad Neurol 2023; 26:408-418. [PMID: 37970294 PMCID: PMC10645206 DOI: 10.4103/aian.aian_142_23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/13/2023] [Accepted: 05/23/2023] [Indexed: 11/17/2023] Open
Abstract
Background Idiopathic inflammatory myopathies (IIM), also called autoimmune myositis, are heterogeneous. These include dermatomyositis (DM), inclusion body myositis, immune mediated necrotizing myopathy (IMNM), anti-synthetase syndrome (ASS), and overlap polymyositis. Classification of IIM has evolved from clinical to clinico-pathologic to the recent clinico-sero-pathologic with the discovery of myositis-specific antibodies (MSA) and myositis-associated antibodies. The various antibodies have shown association with specific phenotypes. Objective To analyze muscle biopsy features with respect to each MSA and MAA to understand the frequency of findings in each entity. Materials and Methods Biopsy-proven cases of IIM where myositis profile was available were included in the study after obtaining Institutional Ethics Committee (IEC) approval. In addition to the stains and enzyme histochemistry, immunohistochemistry with MHC class I and II and MxA was performed. Features like perifascicular atrophy, perifascicular necrosis, scattered necrosis, inflammation, etc. were analyzed. Myositis profile was performed by line-blot technique using a 16-antigen panel. Cases were divided into different autoantibody subgroups. Various clinical, demographic, and muscle biopsy features were studied with respect to each MSA and MAA. Results There were a total of 64 cases. Mi2 (N = 18) was the most common autoantibody. Some of the salient observations included PFA with perivascular inflammation in Mi2; pediatric cases and microinfarcts in NXP2; no PFA or inflammation in MDA5; perifascicular necrosis in JO1; extensive necrosis with sparse inflammation in SRP; more inflammation in overlap myositis; MxA positivity in DM; and absent in ASS. Conclusion This is a pilot study documenting differences in biopsy phenotype with each MSA and MAA which is comparable to the literature. These findings can be used to characterize IIM in seronegative biopsies.
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Affiliation(s)
- Archana Gudipati
- Department of Pathology, Nizam’s Institute of Medical Sciences, Hyderabad, Telangana, India
| | - Shaikh Rifat
- Department of Pathology, Nizam’s Institute of Medical Sciences, Hyderabad, Telangana, India
| | - Megha Uppin
- Department of Pathology, Nizam’s Institute of Medical Sciences, Hyderabad, Telangana, India
| | - Afshan Jabeen
- Department of Neurology, Nizam’s Institute of Medical Sciences, Hyderabad, Telangana, India
| | | | - Sireesha Yareeda
- Department of Neurology, Nizam’s Institute of Medical Sciences, Hyderabad, Telangana, India
| | - Sunitha Kayidhi
- Department of Consultant Rheumatologist, Continental Hospital, Hyderabad, Telangana, India
| | - Anjan Pyal
- Department of Consultant Neurologist, Citi Neuro Centre, Hyderabad, Telangana, India
| | - Megha Dhamne
- Department of Consultant, PD Hinduja Hospital, Mumbai, Maharashtra, India
| | - Y Muralidhar Reddy
- Department of Consultant Neurologist, Care Hospital, Banjara Hills, Hyderabad, Telangana, India
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Dallevet CA, Benveniste O, Allenbach Y. Pathogenesis and Treatment in IMNM. CURRENT TREATMENT OPTIONS IN RHEUMATOLOGY 2023. [DOI: 10.1007/s40674-023-00201-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Bandeira M, Dourado E, Melo AT, Martins P, Fraga V, Ferraro JL, Saraiva A, Sousa M, Parente H, Soares C, Correia AM, Almeida DE, Dinis SP, Pinto AS, Oliveira Pinheiro F, Rato MS, Beirão T, Samões B, Santos B, Mazeda C, Chícharo AT, Faria M, Neto A, Lourenço MH, Brites L, Rodrigues M, Silva-Dinis J, Dias JM, Araújo FC, Martins N, Couto M, Valido A, Santos MJ, Barreira SC, Fonseca JE, Campanilho-Marques R. Predictors of cardiac involvement in idiopathic inflammatory myopathies. Front Immunol 2023; 14:1146817. [PMID: 36969246 PMCID: PMC10030705 DOI: 10.3389/fimmu.2023.1146817] [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: 01/17/2023] [Accepted: 02/24/2023] [Indexed: 03/11/2023] Open
Abstract
ObjectivesIdiopathic inflammatory myopathies (IIM) are a group of rare disorders that can affect the heart. This work aimed to find predictors of cardiac involvement in IIM.MethodsMulticenter, open cohort study, including patients registered in the IIM module of the Rheumatic Diseases Portuguese Register (Reuma.pt/Myositis) until January 2022. Patients without cardiac involvement information were excluded. Myo(peri)carditis, dilated cardiomyopathy, conduction abnormalities, and/or premature coronary artery disease were considered.Results230 patients were included, 163 (70.9%) of whom were females. Thirteen patients (5.7%) had cardiac involvement. Compared with IIM patients without cardiac involvement, these patients had a lower bilateral manual muscle testing score (MMT) at the peak of muscle weakness [108.0 ± 55.0 vs 147.5 ± 22.0, p=0.008] and more frequently had oesophageal [6/12 (50.0%) vs 33/207 (15.9%), p=0.009] and lung [10/13 (76.9%) vs 68/216 (31.5%), p=0.001] involvements. Anti-SRP antibodies were more commonly identified in patients with cardiac involvement [3/11 (27.3%) vs 9/174 (5.2%), p=0.026]. In the multivariate analysis, positivity for anti-SRP antibodies (OR 104.3, 95% CI: 2.5-4277.8, p=0.014) was a predictor of cardiac involvement, regardless of sex, ethnicity, age at diagnosis, and lung involvement. Sensitivity analysis confirmed these results.ConclusionAnti-SRP antibodies were predictors of cardiac involvement in our cohort of IIM patients, irrespective of demographical characteristics and lung involvement. We suggest considering frequent screening for heart involvement in anti-SRP-positive IIM patients.
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Affiliation(s)
- Matilde Bandeira
- Serviço de Reumatologia, Centro Hospitalar Universitário Lisboa Norte, Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal
- Unidade de Investigação em Reumatologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, CAML, Lisboa, Portugal
- *Correspondence: Matilde Bandeira,
| | - Eduardo Dourado
- Serviço de Reumatologia, Centro Hospitalar Universitário Lisboa Norte, Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal
- Unidade de Investigação em Reumatologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, CAML, Lisboa, Portugal
| | - Ana Teresa Melo
- Serviço de Reumatologia, Centro Hospitalar Universitário Lisboa Norte, Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal
- Unidade de Investigação em Reumatologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, CAML, Lisboa, Portugal
| | - Patrícia Martins
- Serviço de Reumatologia, Centro Hospitalar Universitário Lisboa Norte, Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal
- Unidade de Investigação em Reumatologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, CAML, Lisboa, Portugal
| | - Vanessa Fraga
- Serviço de Reumatologia, Hospital Garcia de Orta, Almada, Portugal
| | | | - André Saraiva
- Serviço de Reumatologia, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - Marlene Sousa
- Serviço de Reumatologia, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - Hugo Parente
- Serviço de Reumatologia, Unidade Local de Saúde do Alto Minho, Ponte de Lima, Portugal
| | - Catarina Soares
- Serviço de Reumatologia, Unidade Local de Saúde do Alto Minho, Ponte de Lima, Portugal
| | | | | | - Sara Paiva Dinis
- Serviço de Reumatologia, Unidade Local de Saúde da Guarda, Guarda, Portugal
| | - Ana Sofia Pinto
- Serviço de Reumatologia, Unidade Local de Saúde da Guarda, Guarda, Portugal
| | | | - Maria Seabra Rato
- Serviço de Reumatologia, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Tiago Beirão
- Serviço de Reumatologia, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - Beatriz Samões
- Serviço de Reumatologia, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - Bernardo Santos
- Serviço de Reumatologia, Centro Hospitalar do Baixo Vouga, Aveiro, Portugal
| | - Carolina Mazeda
- Serviço de Reumatologia, Centro Hospitalar do Baixo Vouga, Aveiro, Portugal
| | | | - Margarida Faria
- Serviço de Reumatologia, Hospital Nélio Mendonça, Serviços de Saúde da Região Autónoma da Madeira, Funchal, Portugal
| | - Agna Neto
- Serviço de Reumatologia, Hospital Nélio Mendonça, Serviços de Saúde da Região Autónoma da Madeira, Funchal, Portugal
| | | | - Luísa Brites
- Serviço de Reumatologia, Centro Hospitalar de Leiria, Leiria, Portugal
| | - Marília Rodrigues
- Serviço de Reumatologia, Centro Hospitalar de Leiria, Leiria, Portugal
| | - Joana Silva-Dinis
- Serviço de Reumatologia, Centro Hospitalar Universitário de Lisboa Central, Lisboa, Portugal
| | - João Madruga Dias
- Serviço de Reumatologia, Centro Hospitalar de Médio Tejo, Tomar, Portugal
| | - Filipe C. Araújo
- Serviço de Reumatologia, Hospital CUF Cascais, Cascais, Portugal
| | - Nádia Martins
- Serviço de Reumatologia, Centro Hospitalar Tondela-Viseu, Viseu, Portugal
| | - Maura Couto
- Serviço de Reumatologia, Centro Hospitalar Tondela-Viseu, Viseu, Portugal
| | - Ana Valido
- Serviço de Reumatologia, Unidade Local de Saúde do Litoral Alentejano, Santiago do Cacém, Portugal
| | - Maria José Santos
- Unidade de Investigação em Reumatologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, CAML, Lisboa, Portugal
- Serviço de Reumatologia, Hospital Garcia de Orta, Almada, Portugal
| | - Sofia Carvalho Barreira
- Serviço de Reumatologia, Centro Hospitalar Universitário Lisboa Norte, Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal
- Unidade de Investigação em Reumatologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, CAML, Lisboa, Portugal
| | - João Eurico Fonseca
- Serviço de Reumatologia, Centro Hospitalar Universitário Lisboa Norte, Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal
- Unidade de Investigação em Reumatologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, CAML, Lisboa, Portugal
| | - Raquel Campanilho-Marques
- Serviço de Reumatologia, Centro Hospitalar Universitário Lisboa Norte, Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal
- Unidade de Investigação em Reumatologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, CAML, Lisboa, Portugal
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Abstract
Idiopathic inflammatory myopathies (IIMs) are characterized by inflammation of muscles and other organs. Several myositis-specific autoantibodies (MSAs) have been identified in IIMs and were found to be associated with distinct clinical features. Although MSAs are valuable for the diagnosis of IIMs, the pathogenic roles of these antibodies remain unknown. To investigate the pathogenesis of IIMs, several animal models of experimental myositis have been established. Classical murine models of autoimmune myositis, experimental autoimmune myositis, and C protein-induced myositis are established by immunization with muscle-specific antigens, myosin, and skeletal C protein, respectively. Furthermore, a murine model of experimental myositis was generated by immunization with a murine recombinant histidyl-tRNA synthetase, Jo-1, in which muscle and lung inflammation reflecting anti-synthetase syndrome are induced depending on acquired immunity. Recently, the transfer of human IgGs from patients with immune-mediated necrotizing myopathy, comprising anti-signal recognition particles and anti-3-hydroxy-3-methylglutaryl coenzyme A reductase antibodies, was found to induce complement-mediated myositis in recipient mice. CD8+ T cell-mediated myositis can be established depending on autoimmunity against transcriptional intermediary factor 1γ (TIF1γ), an autoantigen for MSAs induced by recombinant human TIF1γ immunization. These new murine models reflecting MSA-related IIMs are useful tools for accurately understanding the pathological mechanisms underlying IIMs.
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Affiliation(s)
- Risa Konishi
- Department of Dermatology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuki Ichimura
- Department of Dermatology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Naoko Okiyama
- Department of Dermatology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Mammen AL, Amato AA, Dimachkie MM, Chinoy H, Hussain Y, Lilleker JB, Pinal-Fernandez I, Allenbach Y, Boroojerdi B, Vanderkelen M, Delicha EM, Koendgen H, Farzaneh-Far R, Duda PW, Sayegh C, Benveniste O. Zilucoplan in immune-mediated necrotising myopathy: a phase 2, randomised, double-blind, placebo-controlled, multicentre trial. THE LANCET. RHEUMATOLOGY 2023; 5:e67-e76. [PMID: 36923454 PMCID: PMC10009502 DOI: 10.1016/s2665-9913(23)00003-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Background Immune-mediated necrotizing myopathy (IMNM) is an autoimmune myopathy characterised by proximal muscle weakness, high creatine kinase (CK) values, and autoantibodies recognizing 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR) or the signal recognition particle (SRP). There are currently no approved therapies for IMNM and many patients experience active disease despite off-label treatment with intravenous immunoglobulin, glucocorticoids, and immunosuppressants. Detection of complement-activating anti-HMGCR and anti-SRP autoantibodies and the presence of complement deposition on the sarcolemma of non-necrotic myofibers led to the hypothesis that complement activation may be pathogenic in IMNM, therefore zilucoplan, a complement component 5 (C5) inhibitor, could be a potential therapy. Methods IMNM01, a phase 2, multicenter, randomised, double-blind, placebo-controlled study (NCT04025632) at 15 sites (four countries) evaluated efficacy, safety, and tolerability of zilucoplan in adult participants with anti-HMGCR or anti-SRP autoantibody-positive IMNM. Participants were randomised 1:1 to receive daily subcutaneous zilucoplan (0·3mg/kg) or placebo for eight weeks; with optional enrolment in the study open-label extension. Primary efficacy endpoint was percent change from baseline to Week 8 in CK levels. Secondary endpoints included safety. Findings Between 07 November 2019 and 07 January 2021, 27 participants (13 female and 14 male) received zilucoplan (n=12) or placebo (n=15) and completed the 8-week main study. At Week 8 there were no clinically relevant or statistically significant differences, despite target engagement based on mode of action, between treatment arms in mean percent change (standard deviation) of CK levels versus baseline (-9·86% [26·06] versus -20·72% [31·22] in zilucoplan [n=10] and placebo arms [n=14], p=0·46, respectively) and no clinically relevant improvement over time within the treatment arm. There were no unexpected adverse safety or tolerability findings. Treatment emergent adverse events (TEAEs) and serious TEAEs were reported in n=9 (75·0%) vs n=13 (86·7%) and n=0 (0%) and n=3 (20·0%) participants, respectively. The most frequent TEAEs were headache (n=4 in both groups [33·3% and 26·7%, respectively]) and nausea (n=3 in both groups [25·0% and 20·0%, respectively]). Interpretation C5 inhibition does not appear to be an effective treatment modality for IMNM. Rather than driving myofiber necrosis, complement activation may be secondary to muscle injury. Funding Study funded by Ra Pharmaceuticals (now part of UCB Pharma).
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Affiliation(s)
- Andrew L Mammen
- Muscle Disease Unit, Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Anthony A Amato
- Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Mazen M Dimachkie
- Department of Neurology, University of Kansas Medical Center, Kansas City, Kansas USA
| | - Hector Chinoy
- National Institute for Health Research Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, The University of Manchester, Manchester, UK; Department of Rheumatology, Salford Royal Hospital, Northern Care Alliance NHS Foundation Trust, Manchester Academic Health Science Centre, Salford, UK
| | - Yessar Hussain
- Austin Neuromuscular Center, The University of Texas Dell Medical School, Austin, Texas, USA
| | - James B Lilleker
- Centre for Musculoskeletal Research, Division of Musculoskeletal and Dermatological Sciences, School of Biological Sciences, The University of Manchester, Manchester, UK; Manchester Centre for Clinical Neurosciences, Northern Care Alliance NHS Foundation Trust, Manchester Academic Health Science Centre, Salford, UK
| | - Iago Pinal-Fernandez
- Muscle Disease Unit, Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Yves Allenbach
- Department of Internal Medicine and Clinical Immunology, Sorbonne Université, Assistance Publique Hôpitaux de Paris, Pitié-Salpêtrière University Hospital, Paris, France; Institut National de la Santé et de la Recherche Médicale, Association Institut de Myologie, Centre de Recherche en Myologie, UMRS974, Paris, France
| | | | | | | | | | | | | | | | - Olivier Benveniste
- Department of Internal Medicine and Clinical Immunology, Sorbonne Université, Assistance Publique Hôpitaux de Paris, Pitié-Salpêtrière University Hospital, Paris, France; Institut National de la Santé et de la Recherche Médicale, Association Institut de Myologie, Centre de Recherche en Myologie, UMRS974, Paris, France
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Limaye VS. Preventing myofibre necrosis in immune-mediated necrotising myopathy-is complement inhibition effective? THE LANCET. RHEUMATOLOGY 2023; 5:e60-e61. [PMID: 38251538 DOI: 10.1016/s2665-9913(23)00002-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 12/20/2022] [Indexed: 01/26/2023]
Affiliation(s)
- Vidya Sadanand Limaye
- Rheumatology Department, Royal Adelaide Hospital, Adelaide, SA 5000, Australia; Department of Medicine, University of Adelaide, Adelaide, SA, Australia.
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Qiu R, Wang Z, Wei X, Sui H, Jiang Z, Yu XF. The pathogenesis of anti-signal recognition particle necrotizing myopathy: A Review. Biomed Pharmacother 2022; 156:113936. [DOI: 10.1016/j.biopha.2022.113936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/22/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022] Open
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Tanemoto M, Oda R, Toyama Y, Shizukawa H, Yokokawa K, Saito T, Suzuki S, Matsumura A, Hisahara S. Anti-signal Recognition Particle Antibody-positive Immune-mediated Myopathy after mRNA-1273 SARS-CoV-2 Vaccination. Intern Med 2022; 61:3605-3609. [PMID: 36104199 PMCID: PMC9790798 DOI: 10.2169/internalmedicine.0404-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
A 26-year-old Japanese woman developed a fever, myalgia and gait disturbance one day after receiving the second dose of the mRNA-1273 severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine. A neurological examination revealed symmetrical weakness and myalgia in proximal lower limbs, and a blood examination showed prominent elevation of creatinine kinase. Magnetic resonance imaging (MRI) revealed a high signal intensity in the thigh muscles on short-tau inversion recovery images, and antibody testing revealed positive findings for anti-signal recognition particle (SRP) antibody. Thus, anti-SRP antibody-positive immune-mediated myopathy was diagnosed. We initiated immunotherapy, and she was ultimately able to walk stably.
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Affiliation(s)
- Masanobu Tanemoto
- Department of Neurology, Sapporo Medical University School of Medicine, Japan
| | - Ryosuke Oda
- Department of Neurology, Sapporo Kosei General Hospital, Japan
| | - Yuichiro Toyama
- Department of Neurology, Sapporo Kosei General Hospital, Japan
| | | | - Kazuki Yokokawa
- Department of Neurology, Sapporo Medical University School of Medicine, Japan
| | - Taro Saito
- Department of Neurology, Sapporo Medical University School of Medicine, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, Sapporo Medical University School of Medicine, Japan
| | - Akihiro Matsumura
- Department of Neurology, Sapporo Medical University School of Medicine, Japan
| | - Shin Hisahara
- Department of Neurology, Sapporo Medical University School of Medicine, Japan
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Xu J, Liang C, Li J. A signal recognition particle-related joint model of LASSO regression, SVM-RFE and artificial neural network for the diagnosis of systemic sclerosis-associated pulmonary hypertension. Front Genet 2022; 13:1078200. [PMID: 36518216 PMCID: PMC9742487 DOI: 10.3389/fgene.2022.1078200] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 11/17/2022] [Indexed: 08/18/2023] Open
Abstract
Background: Systemic sclerosis-associated pulmonary hypertension (SSc-PH) is one of the most common causes of death in patients with systemic sclerosis (SSc). The complexity of SSc-PH and the heterogeneity of clinical features in SSc-PH patients contribute to the difficulty of diagnosis. Therefore, there is a pressing need to develop and optimize models for the diagnosis of SSc-PH. Signal recognition particle (SRP) deficiency has been found to promote the progression of multiple cancers, but the relationship between SRP and SSc-PH has not been explored. Methods: First, we obtained the GSE19617 and GSE33463 datasets from the Gene Expression Omnibus (GEO) database as the training set, GSE22356 as the test set, and the SRP-related gene set from the MSigDB database. Next, we identified differentially expressed SRP-related genes (DE-SRPGs) and performed unsupervised clustering and gene enrichment analyses. Then, we used least absolute shrinkage and selection operator (LASSO) regression and support vector machine-recursive feature elimination (SVM-RFE) to identify SRP-related diagnostic genes (SRP-DGs). We constructed an SRP scoring system and a nomogram model based on the SRP-DGs and established an artificial neural network (ANN) for diagnosis. We used receiver operating characteristic (ROC) curves to identify the SRP-related signature in the training and test sets. Finally, we analyzed immune features, signaling pathways, and drugs associated with SRP and investigated SRP-DGs' functions using single gene batch correlation analysis-based GSEA. Results: We obtained 30 DE-SRPGs and found that they were enriched in functions and pathways such as "protein targeting to ER," "cytosolic ribosome," and "coronavirus disease-COVID-19". Subsequently, we identified seven SRP-DGs whose expression levels and diagnostic efficacy were validated in the test set. As one signature, the area under the ROC curve (AUC) values for seven SRP-DGs were 0.769 and 1.000 in the training and test sets, respectively. Predictions made using the nomogram model are likely beneficial for SSc-PH patients. The AUC values of the ANN were 0.999 and 0.860 in the training and test sets, respectively. Finally, we discovered that some immune cells and pathways, such as activated dendritic cells, complement activation, and heme metabolism, were significantly associated with SRP-DGs and identified ten drugs targeting SRP-DGs. Conclusion: We constructed a reliable SRP-related ANN model for the diagnosis of SSc-PH and investigated the possible role of SRP in the etiopathogenesis of SSc-PH by bioinformatics methods to provide a basis for precision and personalized medicine.
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Affiliation(s)
- Jingxi Xu
- North Sichuan Medical College, Nanchong, China
- Department of Rheumatology and Immunology, The First People’s Hospital of Yibin, Yibin, China
| | - Chaoyang Liang
- Department of Rheumatology and Immunology, The First People’s Hospital of Yibin, Yibin, China
| | - Jiangtao Li
- Department of Rheumatology and Immunology, The First People’s Hospital of Yibin, Yibin, China
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Ma X, Bu BT. Anti-SRP immune-mediated necrotizing myopathy: A critical review of current concepts. Front Immunol 2022; 13:1019972. [PMID: 36311711 PMCID: PMC9612835 DOI: 10.3389/fimmu.2022.1019972] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 09/12/2022] [Indexed: 11/18/2022] Open
Abstract
Purpose of review This review aims to describe clinical and histological features, treatment, and prognosis in patients with anti-signal recognition particle (SRP) autoantibodies positive immune-mediated necrotizing myopathy (SRP-IMNM) based on previous findings. Previous findings Anti-SRP autoantibodies are specific in IMNM. Humoral autoimmune and inflammatory responses are the main autoimmune characteristics of SRP-IMNM. SRP-IMNM is clinically characterized by acute or subacute, moderately severe, symmetrical proximal weakness. Younger patients with SRP-IMNM tend to have more severe clinical symptoms. Patients with SRP-IMNM may be vulnerable to cardiac involvement, which ought to be regularly monitored and cardiac magnetic resonance imaging is the recommended detection method. The pathological features of SRP-IMNM are patchy or diffuse myonecrosis and myoregeneration accompanied by a paucity of inflammatory infiltrates. Endoplasmic reticulum stress-induced autophagy pathway and necroptosis are activated in skeletal muscle of SRP-IMNM. Treatment of refractory SRP-IMNM encounters resistance and warrants further investigation. Summary Anti-SRP autoantibodies define a unique population of IMNM patients. The immune and non-immune pathophysiological mechanisms are involved in SRP-IMNM.
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Affiliation(s)
- Xue Ma
- Department of Neurology, Tangdu Hospital, Air Force Medical University, Xi’an, China
| | - Bi-Tao Bu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Bi-Tao Bu,
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Casal-Dominguez M, Pinal-Fernández I, Mammen AL. Utility of Myositis-Specific Autoantibodies for Treatment Selection in Myositis. CURRENT TREATMENT OPTIONS IN RHEUMATOLOGY 2022. [DOI: 10.1007/s40674-022-00198-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Prevention of Anti-HMGCR Immune-Mediated Necrotising Myopathy by C5 Complement Inhibition in a Humanised Mouse Model. Biomedicines 2022; 10:biomedicines10082036. [PMID: 36009583 PMCID: PMC9405589 DOI: 10.3390/biomedicines10082036] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/10/2022] [Accepted: 08/17/2022] [Indexed: 11/16/2022] Open
Abstract
Introduction: immune-mediated necrotising myopathy (IMNM) is associated with pathogenic anti-signal recognition particle (SRP) or 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR) antibodies, at least partly through activation of the classical pathway of the complement. We evaluated zilucoplan, an investigational drug, and a macrocyclic peptide inhibitor of complement component 5 (C5), in humanized mouse models of IMNM. Methods: purified immunoglobulin G (IgG) from an anti-HMGCR+ IMNM patient was co-injected intraperitoneally with human complement in C57BL/6, C5-deficient B10 (C5def) and Rag2 deficient (Rag2−/−) mice. Zilucoplan was administered subcutaneously in a preventive or interventional paradigm, either injected daily throughout the duration of the experiment in C57BL/6 and C5def mice or 8 days after disease induction in Rag2−/− mice. Results: prophylactic administration of zilucoplan prevented muscle strength loss in C5def mice (anti-HMGCR+ vs. anti-HMGCR+ + zilucoplan: p = 0.0289; control vs. anti-HMGCR+ + zilucoplan: p = 0.4634) and wild-type C57BL/6 (anti-HMGCR+ vs. anti-HMGCR+ + zilucoplan: p = 0.0002; control vs. anti-HMGCR+ + zilucoplan: p = 0.0939) with corresponding reduction in C5b-9 deposits on myofibres and number of regenerated myofibres. Interventional treatment of zilucoplan after disease induction reduced the complement deposits and number of regenerated myofibres in muscles of Rag2−/− mice, although to a lesser extent. In this latter setting, C5 inhibition did not significantly ameliorate muscle strength. Conclusion: Early administration of zilucoplan prevents the onset of myopathy at the clinical and histological level in a humanized mouse model of IMNM.
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Abstract
A 72-year-old woman presented with gradually-worsening myalgia and muscle weakness of the proximal lower limbs as well as elevated serum creatine kinase level. Based on a clinicoseropathological examination including a muscle biopsy, she was diagnosed with anti-signal recognition particle (SRP) myopathy. Although the myopathy relapsed two times in two years under oral prednisolone and intravenous immunoglobulin therapy, the myopathy remained in remission for more than three years after resection of gastric cancer. Although the anti-SRP myopathy is not considered to be cancer-associated in general, we should note that some cases of anti-SRP myopathy may be ameliorated with appropriate cancer treatment.
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Affiliation(s)
- Yoshihide Sehara
- Department of Neurology, Haga Red Cross Hospital, Japan
- Division of Genetic Therapeutics, Center for Molecular Medicine, Jichi Medical University, Japan
| | - Kyoichiro Tsuchiya
- Department of Diabetes and Endocrinology, University of Yamanashi Hospital, Japan
| | - Ichizo Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Japan
- Department of Genome Medicine Development, Medical Genome Center, National Center of Neurology and Psychiatry (NCNP), Japan
| | - Hirotake Sato
- Department of Surgery, Haga Red Cross Hospital, Japan
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40
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Chen J, Lin DL, Lin AY. A case of meningoencephalomyelitis associated with immune-mediated necrotizing myopathy. Neurol Sci 2022; 43:6585-6588. [DOI: 10.1007/s10072-022-06279-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/11/2022] [Indexed: 10/16/2022]
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Galindo-Feria AS, Wang G, Lundberg IE. Autoantibodies: Pathogenic or epiphenomenon. Best Pract Res Clin Rheumatol 2022; 36:101767. [PMID: 35810122 DOI: 10.1016/j.berh.2022.101767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Idiopathic inflammatory myopathies (IIM) are heterogeneous autoimmune diseases. There are distinct subgroups, including antisynthetase syndrome, dermatomyositis, polymyositis, immune-mediated necrotizing myopathy, and sporadic inclusion body myositis. In patients with IIM, autoantibodies are present in up to 80% of the patients. These autoantibodies are often characterized as myositis-specific autoantibodies (MSA) or myositis-associated autoantibodies (MAA). The recognition of the importance of autoantibodies, especially MSA, is increasing in recent years. In this chapter, we provide an overview of the MSAs, including some new autoantibodies of interest as they target mainly muscle-specific autoantigen, in clinical classification, the measurement of the disease activity, and a possible role in the pathogenesis in the patients with IIM.
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Affiliation(s)
- Angeles S Galindo-Feria
- Division of Rheumatology, Department of Medicine, Karolinska Institutet, Solna, Stockholm, Sweden; Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Solna, Sweden.
| | - Guochun Wang
- Department of Rheumatology, Key Laboratory of Myositis, China-Japan Friendship Hospital, Beijing, 100029, China.
| | - Ingrid E Lundberg
- Division of Rheumatology, Department of Medicine, Karolinska Institutet, Solna, Stockholm, Sweden; Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Solna, Sweden.
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Kellogg MK, Tikhonova EB, Karamyshev AL. Signal Recognition Particle in Human Diseases. Front Genet 2022; 13:898083. [PMID: 35754847 PMCID: PMC9214365 DOI: 10.3389/fgene.2022.898083] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 05/05/2022] [Indexed: 01/14/2023] Open
Abstract
The signal recognition particle (SRP) is a ribonucleoprotein complex with dual functions. It co-translationally targets proteins with a signal sequence to the endoplasmic reticulum (ER) and protects their mRNA from degradation. If SRP is depleted or cannot recognize the signal sequence, then the Regulation of Aberrant Protein Production (RAPP) is activated, which results in the loss of secretory protein mRNA. If SRP recognizes the substrates but is unable to target them to ER, they may mislocalize or degrade. All these events lead to dramatic consequence for protein biogenesis, activating protein quality control pathways, and creating pressure on cell physiology, and might lead to the pathogenesis of disease. Indeed, SRP dysfunction is involved in many different human diseases, including: congenital neutropenia; idiopathic inflammatory myopathy; viral, protozoal, and prion infections; and cancer. In this work, we analyze diseases caused by SRP failure and discuss their possible molecular mechanisms.
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Affiliation(s)
- Morgana K Kellogg
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX, United States
| | - Elena B Tikhonova
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX, United States
| | - Andrey L Karamyshev
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX, United States
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43
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Connolly CM, Plomp L, Paik JJ, Allenbach Y. Possible future avenues for myositis therapeutics: DM, IMNM and IBM. Best Pract Res Clin Rheumatol 2022; 36:101762. [PMID: 35778272 DOI: 10.1016/j.berh.2022.101762] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Idiopathic inflammatory myopathies (IIMs) represent a heterogeneous group of systemic autoimmune diseases characterized by immune-mediated muscle injury. As insights into pathogenesis of IIM evolve, novel therapeutic strategies have become available to optimize outcomes. Herein, we summarize novel and emerging strategies in the management of dermatomyositis (DM), immunemediated necrotizing myopathy (IMNM), and inclusion body myositis (IBM).
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Affiliation(s)
- Caoilfhionn M Connolly
- Division of Rheumatology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Lotta Plomp
- Department of Internal Medicine and Clinical Immunology, Pitié Salpêtrière Hospital, Sorbonne University, Paris, France
| | - Julie J Paik
- Division of Rheumatology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Yves Allenbach
- Department of Internal Medicine and Clinical Immunology, Pitié Salpêtrière Hospital, Sorbonne University, Paris, France.
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A Case Report of Statin-Induced Immune-Mediated Necrotizing Myopathy Treatment Challenges. Case Rep Rheumatol 2022; 2022:4647227. [PMID: 35685894 PMCID: PMC9173901 DOI: 10.1155/2022/4647227] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 05/16/2022] [Indexed: 12/02/2022] Open
Abstract
Statin-induced necrotizing autoimmune myopathy is an immune-mediated necrotizing myopathy related to the use of statins. It is a very rare disease, which usually presents with proximal muscle weakness and frank elevation in creatine kinase levels. Stopping statin and the use of immunosuppressive therapy are considered the mainstay therapy. Use of steroids in patients with inflammatory myopathy can be complicated by steroid-induced myopathy. Herein, we present a case of a 55-year-old patient with statin-induced necrotizing autoimmune myopathy based on the presence of proximal muscle weakness, magnetic resonance findings, suggestive muscle biopsy features, and positive anti-HMGCR autoantibodies. The patient was treated with triple immunosuppressive therapy with a particularly good response to intravenous immunoglobulin. This report highlights the importance of timely diagnosis and early use of combined immunosuppressive therapy to improve patients' outcome affected by this rare disease.
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Szczesny P, Barsotti S, Nennesmo I, Danielsson O, Dastmalchi M. Screening for Anti-HMGCR Antibodies in a Large Single Myositis Center Reveals Infrequent Exposure to Statins and Diversiform Presentation of the Disease. Front Immunol 2022; 13:866701. [PMID: 35603214 PMCID: PMC9114810 DOI: 10.3389/fimmu.2022.866701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 03/29/2022] [Indexed: 11/13/2022] Open
Abstract
Background The objective of this study is to assess the frequency of autoantibodies against 3-hydroxy-3-methyl-glutaryl-coenzyme A reductase (HMGCR) in a single center myositis cohort and to analyze associations with statin exposure, clinical features, and outcome of disease course. Methods A total of 312 patients with idiopathic inflammatory myopathies (IIMs) followed at the rheumatology clinic, Karolinska University Hospital, were identified in the Euromyositis registry between 1988 and 2014 and were classified according to the 2017 European Alliance of Associations for Rheumatology/American College of Rheumatology (EULAR/ACR) criteria. Available serum samples were analyzed for anti-HMGCR autoantibodies by ELISA. Positive sera were confirmed by immunoprecipitation. Clinical data were extracted from Euromyositis registry and medical records. Muscle samples were examined by two pathologists blinded to the subjects' autoantibody status. Results Of 312 patients, 13 (4.3%) were positive for anti-HMGCR. Two of the 13 (15%) anti-HMGCR-positive patients had histories of statin use versus 12 (4.2%) in the anti-HMGCR-negative group. In the anti-HMGCR-positive group, five (38%) had a clinical phenotype compatible with dermatomyositis. Muscle biopsies of patients with HMGCR autoantibodies showed findings consistent with immune-mediated necrotizing myopathy in all cases except for one. Five (38%) patients required treatment with intravenous immunoglobulin compared to seven (2.3%) without this antibody. At the last visit, seven patients had chronic, active disease course, and five of 13 patients were in remission, including three without treatment. Conclusions Patients with IIM related to anti-HMGCR autoantibodies may present with a wide range of symptoms, more than previously anticipated. When a broad approach to screening for these antibodies is applied, only a minority of patients was found to have previous statin exposure. The results of this study justify the addition of anti-HMGCR autoantibodies to routine diagnostic procedures in patients with myositis.
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Affiliation(s)
- Piotr Szczesny
- Department of Rheumatology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland
| | - Simone Barsotti
- Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
- Rheumatology Outpatient Clinic, Livorno Hospital, Livorno, Italy
| | - Inger Nennesmo
- Department of Laboratory Medicine Karolinska Institutet, Stockholm, Sweden
| | - Olof Danielsson
- Division of Neurology, Department of Biomedical and Clinical Sciences, Faculty of Medicine and Health Sciences, Linkoping University, Linkoping, Sweden
| | - Maryam Dastmalchi
- Division of Rheumatology, Department of Medicine, Karolinska Institutet, Solna, Sweden
- Division of Rheumatology, Karolinska University Hospital, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
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Yeo CH, Yaakub A, Wang MCL, Shim SA, Chong PL, Khalil MAM, Telisinghe PU, Lim KC, Tan J, Chong VH. Refractory Statin-Induced Immune-Mediated Necrotizing Myositis: Challenges and Perils in Its Management. Cureus 2022; 14:e24778. [PMID: 35676976 PMCID: PMC9167579 DOI: 10.7759/cureus.24778] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2022] [Indexed: 12/22/2022] Open
Abstract
Statin or 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMGCR) inhibitor is widely used and plays a vital role in the management of cardiovascular and cerebrovascular diseases. Statin is generally safe and its side effects are mostly mild and self-limiting. Immune-mediated necrotizing myositis (IMNM) is a rare and serious side effect characterized by the presence of anti-HMGCR inhibitor and myositis. Long-term immunosuppressive therapy is often required to manage it, and in refractory cases, the treatment can be very challenging. We report the case of a 55-year-old female with underlying diabetes mellitus and hyperlipidemia who developed refractory statin-induced IMNM despite being administered prednisolone, methotrexate, azathioprine, and immunoglobulin. After the introduction of rituximab, steroids were able to be tapered down to the lowest maintenance dose. Unfortunately, the patient subsequently succumbed to severe coronary artery disease (CAD) likely caused by the long-term steroid therapy, highlighting the difficulty and complications associated with the treatment of IMNM, especially in patients with cardiovascular risk factors.
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Affiliation(s)
- Chong Hsien Yeo
- Department of Medicine, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, BRN
| | - Aziman Yaakub
- Department of Medicine, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, BRN
| | | | - Sylvester Andrew Shim
- Department of Medicine, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, BRN
| | - Pui L Chong
- Department of Medicine, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, BRN
| | | | - Pemasiri U Telisinghe
- Department of Pathology, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, BRN
| | - Kian C Lim
- Department of Radiology, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, BRN
| | - Jackson Tan
- Department of Renal Medicine, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, BRN
| | - Vui H Chong
- Department of Medicine, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, BRN.,Department of Medicine, Pengiran Muda Mahkota Pengiran Muda Haji Al-Muhtadee Billah Hospital, Tutong, BRN
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47
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Pathophysiological Mechanisms and Treatment of Dermatomyositis and Immune Mediated Necrotizing Myopathies: A Focused Review. Int J Mol Sci 2022; 23:ijms23084301. [PMID: 35457124 PMCID: PMC9030619 DOI: 10.3390/ijms23084301] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 03/31/2022] [Accepted: 04/05/2022] [Indexed: 12/15/2022] Open
Abstract
Idiopathic inflammatory myopathies (IIM), collectively known as myositis, are a composite group of rare autoimmune diseases affecting mostly skeletal muscle, although other organs or tissues may also be involved. The main clinical feature of myositis is subacute, progressive, symmetrical muscle weakness in the proximal arms and legs, whereas subtypes of myositis may also present with extramuscular features, such as skin involvement, arthritis or interstitial lung disease (ILD). Established subgroups of IIM include dermatomyositis (DM), immune-mediated necrotizing myopathy (IMNM), anti-synthetase syndrome (ASyS), overlap myositis (OM) and inclusion body myositis (IBM). Although these subgroups have overlapping clinical features, the widespread variation in the clinical manifestations of IIM suggests different pathophysiological mechanisms. Various components of the immune system are known to be important immunopathogenic pathways in IIM, although the exact pathophysiological mechanisms causing the muscle damage remain unknown. Current treatment, which consists of glucocorticoids and other immunosuppressive or immunomodulating agents, often fails to achieve a sustained beneficial response and is associated with various adverse effects. New therapeutic targets have been identified that may improve outcomes in patients with IIM. A better understanding of the overlapping and diverging pathophysiological mechanisms of the major subgroups of myositis is needed to optimize treatment. The aim of this review is to report on recent advancements regarding DM and IMNM.
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Shimada T, Higashida-Konishi M, Akiyama M, Hama S, Izumi K, Matsubara S, Oshima H, Okano Y. Immune-mediated necrotizing myopathy which showed deposition of C5b-9 in the necrotic muscle fibers and was successfully treated with intensive combined therapy with high-dose glucocorticoids, tacrolimus, and intravenous immunoglobulins. Immunol Med 2022; 45:175-179. [PMID: 35389818 DOI: 10.1080/25785826.2022.2060169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Currently, no standard treatment strategy has been established for immune-mediated necrotizing myopathy (IMNM). Here we present a case of IMNM which was successfully treated with intensive combined therapy with high-dose glucocorticoids, tacrolimus, and intravenous immunoglobulins. Her muscle weakness was rapidly progressive and severe so that she became bedridden one week after admission. She was complicated with dysphagia and had serum myogenic enzymes elevation, ventricular diastolic dysfunction, and interstitial lung disease. Serum anti-SRP antibody was positive and her muscle biopsy revealed many necrotic fibers with minimal inflammation. Further histological analysis demonstrated infiltration of phagocytic macrophages with deposition of membrane attack complex (C5b-9) in the necrotic muscle fibers, suggesting activation of complement pathway and macrophages as a pathomechanism of this disease. She was diagnosed as IMNM and was immediately initiated a combination therapy described above, which led to dramatic clinical improvements. Recent studies suggest that intravenous immunoglobulins and tacrolimus can inhibit the activation of complement pathway and macrophages. Our present case suggests that early initiation of intensive combined therapy including intravenous immunoglobulins and tacrolimus might be effective for preventing irreversible muscle damages by disrupting a pathogenic activation of complement and macrophages in IMNM.
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Affiliation(s)
- Tatsuya Shimada
- Department of Medicine, Division of Rheumatology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan.,Department of Internal Medicine, Division of Rheumatology, Keio University School of Medicine, Tokyo, Japan
| | - Misako Higashida-Konishi
- Department of Medicine, Division of Rheumatology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Mitsuhiro Akiyama
- Department of Medicine, Division of Rheumatology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan.,Department of Internal Medicine, Division of Rheumatology, Keio University School of Medicine, Tokyo, Japan
| | - Satoshi Hama
- Department of Medicine, Division of Rheumatology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Keisuke Izumi
- Department of Medicine, Division of Rheumatology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan.,Department of Internal Medicine, Division of Rheumatology, Keio University School of Medicine, Tokyo, Japan
| | - Shiro Matsubara
- Department of Neurology, Tokyo Metropolitan Neurological Hospital, Tokyo, Japan
| | - Hisaji Oshima
- Department of Medicine, Division of Rheumatology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Yutaka Okano
- Department of Medicine, Division of Rheumatology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
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49
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Zeng R, Glaubitz S, Schmidt J. Antibody Therapies in Autoimmune Inflammatory Myopathies: Promising Treatment Options. Neurotherapeutics 2022; 19:911-921. [PMID: 35394612 PMCID: PMC9294121 DOI: 10.1007/s13311-022-01220-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2022] [Indexed: 12/29/2022] Open
Abstract
Inflammatory myopathies, including polymyositis (PM), dermatomyositis (DM), inclusion body myositis (IBM), necrotizing myopathy (NM), antisynthetase syndrome (ASS) and overlap myositis (OM), in short myositis, are rare diseases. All forms of myositis have progressive muscle weakness in common, with each subtype characterized by different autoantibody profiles, histological findings and extramuscular manifestations. Due to better understanding of the pathogenesis of the muscle inflammation in myositis, new molecular pathways for targeted therapy have been discovered. Current therapies aim at different components of the innate or the adaptive immune response. Additionally, non-inflammatory mechanisms in myositis have come into focus as possible treatment targets. The use of therapeutical antibodies in myositis has been examined in various clinical studies, several of them randomized controlled ones: Depletion of B-cells by rituximab has been established as treatment of refractory myositis. IVIG, an antibody therapy in the wider sense, has now been licensed for DM following a recent positive clinical trial. Negative study results were reported in randomized trials with infliximab, sifalimumab and bimagrumab. Studies on basiliximab and eculizumab are currently underway, and are expected to yield results in a couple of years. Despite some promising results of clinical studies with antibody therapy in myositis, further research is crucial to optimize the treatment for this debilitating disease and to find treatment alternatives for treatment-refractory patients.
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Affiliation(s)
- Rachel Zeng
- Muscle Immunobiology Group, Neuromuscular Center, Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Stefanie Glaubitz
- Muscle Immunobiology Group, Neuromuscular Center, Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Jens Schmidt
- Muscle Immunobiology Group, Neuromuscular Center, Department of Neurology, University Medical Center Göttingen, Göttingen, Germany.
- Department of Neurology and Pain Treatment, Immanuel Klinik Rüdersdorf, University Hospital of the Brandenburg Medical School Theodor Fontane, Rüdersdorf bei Berlin, Germany.
- Faculty of Health Sciences Brandenburg, Brandenburg Medical School Theodor Fontane, Rüdersdorf bei Berlin, Germany.
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50
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Ganta N, Alnabwani D, Bommu VJL, Hechter S, Shah V, Cheriyath P. Statin Induced Autoimmune Necrotizing Myopathy (SIANM): An Alarming Adverse Event of a Familiar Medication. Cureus 2022; 14:e22273. [PMID: 35350496 PMCID: PMC8933139 DOI: 10.7759/cureus.22273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2022] [Indexed: 11/17/2022] Open
Abstract
Statins are a widely prescribed medication that lowers serum cholesterol by inhibiting the HMG-CoA reductase enzyme, a rate-limiting step in cholesterol synthesis. Myopathy is one of the well-known adverse effects of statins, mainly when prescribed with the fibrates. However, statin-induced autoimmune necrotizing myopathy (SIANM) is an infrequent and severe complication. Hence, all clinicians should be more vigilant regarding this complication and treat it early to prevent acute kidney injury (AKI).
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