1
|
Shimoyama T, Yoshida K, Muro Y, Ito H, Matsushita T, Oto Y, Ukichi T, Noda K, Kurosaka D. Magnetic Resonance Imaging Patterns Revealing Muscle Pathology and Clinical Features in Idiopathic Inflammatory Myopathies. Rheumatology (Oxford) 2024:keae125. [PMID: 38410065 DOI: 10.1093/rheumatology/keae125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 12/18/2023] [Accepted: 02/12/2024] [Indexed: 02/28/2024] Open
Abstract
OBJECTIVE Idiopathic inflammatory myopathies (IIMs) are autoimmune disorders significantly impacting skeletal muscles; however, the precise correlation between muscle magnetic resonance imaging (MRI) findings, muscle pathology, disease subtypes, and clinical characteristics remains uncertain. Thus, we investigated the association of muscle MRI findings in IIMs with muscle pathology and clinical features. METHODS New-onset IIM patients underwent proximal upper and/or lower limb muscle MRI. Patterns of muscle oedema on MRI were categorised into fascial, honeycomb, peripheral, foggy, dense, or coarse dot patterns and compared with inflammatory cell infiltration sites in corresponding muscle biopsies. The incidence of MRI patterns was examined in patient subgroups using myositis-specific antibodies (MSAs) and 2017 EULAR/ACR classification criteria. Univariate and multivariate analyses were conducted to determine the odds ratios (ORs) of MRI findings for clinical characteristics. RESULTS Fifty-six of 85 patients underwent muscle biopsy. Foggy, honeycomb, and fascial patterns at biopsy sites correlated with inflammatory cell infiltration in the endomysium (OR 11.9, p= 0.005), perimysium (OR 6.0, p= 0.014), and fascia (OR 16.9, p< 0.001), respectively. Honeycomb and foggy patterns were characteristic of patients with anti-TIF1γ or anti-Mi2 antibodies and MSA-negative dermatomyositis, and those with anti-SRP or anti-HMGCR antibodies and MSA-negative polymyositis (PM), respectively. The honeycomb pattern positively correlated with malignancy (OR 6.87, p< 0.001) and Gottron sign (OR 8.05, p= 0.002); the foggy pattern correlated with muscle weakness (OR 11.24, p= 0.005). The dense dot pattern was associated with dysphagia (OR 6.27, p= 0.006) and malignancy (OR 8.49, p= 0.002). CONCLUSION Muscle MRI holds promise in predicting muscle pathology, disease subtypes, and clinical manifestations of IIMs.
Collapse
Affiliation(s)
- Takashi Shimoyama
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | | | - Yoshinao Muro
- Department of Dermatology, Nagoya University, Graduate School of Medicine, Aichi, Japan
| | - Haruyasu Ito
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Takayuki Matsushita
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Yohsuke Oto
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan
| | - Taro Ukichi
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan
| | - Kentaro Noda
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Daitaro Kurosaka
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| |
Collapse
|
2
|
Ghirardello A, Gatto M, Franco C, Zanatta E, Padoan R, Ienna L, Gallo N, Zen M, Lundberg IE, Mahler M, Doria A, Iaccarino L. Detection of Myositis Autoantibodies by Multi-Analytic Immunoassays in a Large Multicenter Cohort of Patients with Definite Idiopathic Inflammatory Myopathies. Diagnostics (Basel) 2023; 13:3080. [PMID: 37835823 PMCID: PMC10572214 DOI: 10.3390/diagnostics13193080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/15/2023] Open
Abstract
BACKGROUND The usefulness of myositis-specific autoantibodies (MSAs) and myositis-associated autoantibodies (MAAs) for the assessment of idiopathic inflammatory myopathies (IIMs) is acknowledged, but laboratory standardization remains a challenge. We detected MSAs/MAAs by multi-analytic line immunoassay (LIA) and particle-based multi-analyte technology (PMAT) in a multicenter cohort of patients with IIMs. METHODS We tested the sera from 411 patients affected with definite IIM, including 142 polymyositis (PM), 147 dermatomyositis (DM), 19 cancer-associated myositis, and 103 overlap myositis syndrome (OM), and from 269 controls. MSAs/MAAs were determined by 16Ags LIA in all sera, and anti-HMGCR by ELISA in 157/411 IIM sera and 91/269 control sera. The analytical specificity of LIA/HMGCR ELISA was compared with that of PMAT in 89 MSA+ IIM sera. RESULTS MSAs/MAAs were positive in 307/411 (75%) IIM patients and 65/269 (24%) controls by LIA (Odds Ratio 9.26, 95% CI 6.43-13.13, p < 0.0001). The sensitivity/specificity of individual MSAs/MAAs were: 20%/100% (Jo-1), 3%/99.3% (PL-7), 4%/98.8% (PL-12), 1%/100% (EJ), 0.7%/100% (OJ), 9%/98% (SRP), 5.6%/99.6% (TIF1γ), 4.6%/99.6% (MDA5), 8%/96% (Mi-2), 1.5%/98% (NXP2), 1.7%/100% (SAE1), 4%/92% (Ku), 8.5%/99% (PM/Scl-100), 8%/96% (PM/Scl-75), and 25.5%/79% (Ro52). Anti-HMGCR was found in 8/157 (5%) IIM patients and 0/176 (0%) controls by ELISA (p = 0.007). Concordance between LIA/HMGCR ELISA and PMAT was found in 78/89 (88%) samples. Individual MSAs detected by LIA were associated with IIM subsets: Jo-1 with PM and OM, PL-12 with OM, Mi-2, TIF1γ, and MDA5 with DM, SRP with PM, and PM/Scl-75/100 with OM (p < 0.001 for all). CONCLUSIONS Since MSAs are mostly mutually exclusive, multi-specific antibody profiling seems effective for a targeted clinical-serologic approach to the diagnosis of IIMs.
Collapse
Affiliation(s)
- Anna Ghirardello
- Rheumatology Unit, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy; (A.G.); (M.G.); (C.F.); (E.Z.); (R.P.); (L.I.); (M.Z.); (L.I.)
| | - Mariele Gatto
- Rheumatology Unit, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy; (A.G.); (M.G.); (C.F.); (E.Z.); (R.P.); (L.I.); (M.Z.); (L.I.)
- Rheumatology Unit, Department of Clinical and Biological Sciences, Mauriziano Hospital, University of Turin, 10124 Turin, Italy
| | - Chiara Franco
- Rheumatology Unit, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy; (A.G.); (M.G.); (C.F.); (E.Z.); (R.P.); (L.I.); (M.Z.); (L.I.)
| | - Elisabetta Zanatta
- Rheumatology Unit, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy; (A.G.); (M.G.); (C.F.); (E.Z.); (R.P.); (L.I.); (M.Z.); (L.I.)
| | - Roberto Padoan
- Rheumatology Unit, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy; (A.G.); (M.G.); (C.F.); (E.Z.); (R.P.); (L.I.); (M.Z.); (L.I.)
| | - Luana Ienna
- Rheumatology Unit, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy; (A.G.); (M.G.); (C.F.); (E.Z.); (R.P.); (L.I.); (M.Z.); (L.I.)
| | - Nicoletta Gallo
- Unit of Laboratory Medicine, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy;
| | - Margherita Zen
- Rheumatology Unit, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy; (A.G.); (M.G.); (C.F.); (E.Z.); (R.P.); (L.I.); (M.Z.); (L.I.)
| | - Ingrid E. Lundberg
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital in Solna, Karolinska Institutet, 171 77 Stockholm, Sweden;
| | | | - Andrea Doria
- Rheumatology Unit, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy; (A.G.); (M.G.); (C.F.); (E.Z.); (R.P.); (L.I.); (M.Z.); (L.I.)
| | - Luca Iaccarino
- Rheumatology Unit, Department of Medicine-DIMED, University Hospital of Padova, 35128 Padova, Italy; (A.G.); (M.G.); (C.F.); (E.Z.); (R.P.); (L.I.); (M.Z.); (L.I.)
| |
Collapse
|
3
|
Rams A, Kosałka-Węgiel J, Kuszmiersz P, Matyja-Bednarczyk A, Polański S, Zaręba L, Bazan-Socha S. Characteristics of idiopathic inflammatory myopathies with novel myositis-specific autoantibodies. ADV CLIN EXP MED 2021; 30:1239-1248. [PMID: 34610217 DOI: 10.17219/acem/141181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND In recent years, many novel myositis-specific autoantibodies (MSAs) have been identified. However, their links with the pathogenesis and clinical manifestations of inflammatory myopathies remain uncertain. OBJECTIVES To characterize the population of adult dermatomyositis (DM) and polymyositis (PM) patients treated at our center for autoimmune diseases using clinical and laboratory measures. MATERIAL AND METHODS According to the Bohan and Peter criteria, we retrospectively analyzed patients who fulfilled diagnostic criteria for DM or PM. Myositis-specific autoantibodies and myositis-associated autoantibodies (MAAs) were identified using immunoblot assays. RESULTS Fifty-one PM (71% women) and 36 DM (67% women) Caucasian patients with a median age of 58 (range: 21-88) years who met the definite or probable diagnostic criteria for myositis were included in the study. Myositis-specific autoantibodies were identified in 63 (72%) patients, whereas MAAs were observed in 43 (49%) of them. Interstitial lung disease (ILD) was characteristic of PM patients (67%, χ2 with Yates's correction (χc2) = 13.8078, df = 1, p = 0.0002), being associated with anti-Jo-1 or anti-PL-12 antibodies (fraction comparison test (FCT) 6.4878, p < 0.0001, 6.8354, p = 0.0003, respectively). Interestingly, among patients with anti-MDA5 antibodies (n = 8, 9.2%), all but one had an amyopathic form, with more frequent ILD, skin changes and arthralgias than observed in other patients (FCT 4.7029, p = 0.0228 and p = 7.7986, p = 0.0357, p = 4.7029 and p = 0.0228, respectively). Anti-signal recognition particle (SRP) was strongly associated with the Raynaud's phenomenon (FCT 4.1144, p = 0.0289) and the highest muscle injury markers (Mann-Whitney U test, z = 2.5293, p = 0.0114). Malignancy was recorded in 14 (16%) patients and was equally common in those with PM and DM. The anti-TIF-1γ was the most frequently related to cancer χ2 = 14.7691, df = 1, p < 0.0001). The anti-Mi-2α, similarly prevalent in DM and PM, was typically accompanied by skin changes (FCT 7.7986, p = 0.0357) but not ILD (FCT 8.7339, p = 0.0026). CONCLUSIONS Identification of MSAs might help to predict the clinical course of the autoimmune myopathy and malignancy risk. However, these antibodies were absent in about 30% of patients with typical PM or DM manifestations, which encourages further research in this area.
Collapse
Affiliation(s)
- Anna Rams
- Department of Pulmonology and Allergology, University Hospital, Kraków, Poland
| | | | - Piotr Kuszmiersz
- Department of Rheumatology and Immunology, University Hospital, Kraków, Poland
| | | | - Stanisław Polański
- Faculty of Medicine, Jagiellonian University, Medical College, Kraków, Poland
| | - Lech Zaręba
- Faculty of Medicine, Jagiellonian University, Medical College, Kraków, Poland
| | | |
Collapse
|
4
|
Ichimura Y, Konishi R, Shobo M, Inoue S, Okune M, Maeda A, Tanaka R, Kubota N, Matsumoto I, Ishii A, Tamaoka A, Shimbo A, Mori M, Morio T, Kishi T, Miyamae T, Tanboon J, Inoue M, Nishino I, Fujimoto M, Nomura T, Okiyama N. Anti-nuclear matrix protein 2 antibody-positive inflammatory myopathies represent extensive myositis without dermatomyositis-specific rash. Rheumatology (Oxford) 2021; 61:1222-1227. [PMID: 34152410 DOI: 10.1093/rheumatology/keab518] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 06/15/2021] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Myositis-specific autoantibodies (MSAs) define distinct clinical subsets of idiopathic inflammatory myopathies (IIMs). The anti-nuclear matrix protein 2 (NXP2) antibody, a MSA detected in juvenile/adult IIMs, has been reported to be associated with a high risk of subcutaneous calcinosis, subcutaneous oedema, and internal malignancies. The study aimed to clarify the clinical features of anti-NXP2 antibody-positive IIMs in detail. METHODS This multi-centre retrospective observational study on 76 anti-NXP2 antibody-positive patients. The antibody was detected via a serological assay using immunoprecipitation and western blotting. The patients were selected from 162 consecutive Japanese patients with IIMs. RESULTS The cohort of anti-NXP2 antibody-positive IIMs included 29 juvenile patients and 47 adult patients. Twenty-seven (35.5%) patients presented with polymyositis phenotype without dermatomyositis-specific skin manifestations (heliotrope rash or Gottron sign/papules); this was more common in the adults than children (48.9% vs. 15.8%, P < 0.01). Nine (11.8%) patients had subcutaneous calcinosis, and 20 (26.3%) patients had subcutaneous oedema. In addition, the proportion of patients with muscle weakness extending to the distal limbs was high (36 patients [47.4%]) in this cohort. Adult patients had a higher prevalence of malignancy than the general population (age-standardised incidence ratio of malignancies: 22.4). CONCLUSION Anti-NXP2 antibody-positive IIMs, which include dermatomyositis sine dermatitis, are characterised by atypical skin manifestations and extensive muscular involvement.
Collapse
Affiliation(s)
- Yuki Ichimura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Risa Konishi
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Miwako Shobo
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Sae Inoue
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Mari Okune
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Akemi Maeda
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Ryota Tanaka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Noriko Kubota
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Isao Matsumoto
- Division of Rheumatology, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Akiko Ishii
- Division of Neurology, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Akira Tamaoka
- Division of Neurology, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Asami Shimbo
- Department of Pediatrics and Development Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Masaaki Mori
- Department of Lifetime Clinical Immunology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tomohiro Morio
- Department of Pediatrics and Development Biology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Kishi
- Institute of Rheumatology, Tokyo Women's Medical University, Tokyo, Japan.,Department of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan
| | - Takako Miyamae
- Institute of Rheumatology, Tokyo Women's Medical University, Tokyo, Japan.,Department of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan
| | - Jantima Tanboon
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Michio Inoue
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Ichizo Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan.,Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Manabu Fujimoto
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan.,Department of Dermatology, Course of Integrated Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Toshifumi Nomura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Naoko Okiyama
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| |
Collapse
|
5
|
Rodríguez-Tejero A, López-Espadafor B, Montero-Vílchez T, Sánchez-Díaz M, Arias-Santiago S, Molina-Leyva A. Treatment challenges in clinically amyopathic dermatomyositis: A case series and review of new therapeutic options for skin involvement. Dermatol Ther 2021; 34:e14942. [PMID: 33719170 DOI: 10.1111/dth.14942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 02/21/2021] [Accepted: 03/11/2021] [Indexed: 11/29/2022]
Abstract
The term clinically amyopathic dermatomyositis (CADM) is used to represent a subgroup of patients with the typical cutaneous features of dermatomyositis (DM) in the absence of muscle involvement. Similar to classic DM, CADM can be associated with other connective tissue disorders and systemic manifestations such as interstitial lung disease and malignancy. Owing to the frequent discordance between muscle response and skin disease, the therapeutic approach to CADM represents a challenge. The current literature suggests that CADM treatment should follow a specific protocol, influenced by visceral involvement and the expression of certain myositis-specific antibodies, and different from the recommendation in the presence of myositis. Here, we present five new cases of CADM. We describe the available therapeutic options for skin manifestations in this type of DM, and we propose a step-by-step therapeutic scheme, using the cutaneous dermatomyositis disease area and severity index to assess response. Our literature review establishes mycophenolate mofetil and intravenous immunoglobulin as the most frequently successful therapies in refractory skin disease.
Collapse
Affiliation(s)
| | | | | | - Manuel Sánchez-Díaz
- Servicio de Dermatología, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | - Salvador Arias-Santiago
- Servicio de Dermatología, Hospital Universitario Virgen de las Nieves, Granada, Spain.,Departamento de Dermatología, Facultad de Medicina, Universidad de Granada, Granada, Spain
| | | |
Collapse
|
6
|
Leung AKC, Lam JM, Alobaida S, Leong KF, Wong AHC. Juvenile Dermatomyositis: Advances in Pathogenesis, Assessment, and Management. Curr Pediatr Rev 2021; 17:273-287. [PMID: 33902423 DOI: 10.2174/1573396317666210426105045] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 02/15/2021] [Accepted: 02/18/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Juvenile dermatomyositis is the most common inflammatory myopathy in the pediatric age group and a major cause of mortality and morbidity in individuals with childhood rheumatic diseases. Mounting evidence suggests that early diagnosis and timely aggressive treatment are associated with better outcomes. OBJECTIVE The purpose of this article is to provide readers with an update on the evaluation, diagnosis, and the treatment of juvenile dermatomyositis. METHODS A PubMed search was performed in Clinical Queries using the key term "juvenile dermatomyositis" in the search engine. The search strategy included meta-analyses, randomized controlled trials, clinical trials, observational studies, and reviews. The search was restricted to English literature. The information retrieved from the above search was used in the compilation of the present article. RESULTS Juvenile dermatomyositis is a chronic autoimmune inflammatory condition characterized by systemic capillary vasculopathy that primarily affects the skin and muscles with possible involvement of other organs. In 2017, the European League Against Rheumatism (EULAR) and the American College of Rheumatology (ACR) developed diagnostic criteria for juvenile idiopathic inflammatory myopathies and juvenile dermatomyositis. In the absence of muscle biopsies which are infrequently performed in children, scores (in brackets) are assigned to four variables related to muscle weakness, three variables related to skin manifestations, one variable related to other clinical manifestations, and two variables related to laboratory measurements to discriminate idiopathic inflammatory myopathies from non-idiopathic inflammatory myopathies as follows: objective symmetric weakness, usually progressive, of the proximal upper extremities (0.7); objective symmetric weakness, usually progressive, of the proximal lower extremities (0.8); neck flexors relatively weaker than neck extensors (1.9); leg proximal muscles relatively weaker than distal muscles (0.9); heliotrope rash (3.1); Gottron papules (2.1); Gottron sign (3.3); dysphagia or esophageal dysmotility (0.7); the presence of anti-Jo-1 autoantibody (3.9); and elevated serum levels of muscle enzymes (1.3). In the absence of muscle biopsy, a definite diagnosis of idiopathic inflammatory myopathy can be made if the total score is ≥7.5. Patients whose age at onset of symptoms is less than 18 years and who meet the above criteria for idiopathic inflammatory myopathy and have a heliotrope rash, Gottron papules or Gottron sign are deemed to have juvenile dermatomyositis. The mainstay of therapy at the time of diagnosis is a high-dose corticosteroid (oral or intravenous) in combination with methotrexate. CONCLUSION For mild to moderate active muscle disease, early aggressive treatment with high-dose oral prednisone alone or in combination with methotrexate is the cornerstone of management. Pulse intravenous methylprednisolone is often preferred to oral prednisone in more severely affected patients, patients who respond poorly to oral prednisone, and those with gastrointestinal vasculopathy. Other steroid-sparing immunosuppressive agents such as cyclosporine and cyclophosphamide are reserved for patients with contraindications or intolerance to methotrexate and for refractory cases, as the use of these agents is associated with more adverse events. Various biological agents have been used in the treatment of juvenile dermatomyositis. Data on their efficacy are limited, and their use in the treatment of juvenile dermatomyositis is considered investigational.
Collapse
Affiliation(s)
- Alexander K C Leung
- Department of Pediatrics, The University of Calgary, Alberta Children's Hospital, Calgary, Alberta,Canada
| | - Joseph M Lam
- Department of Pediatrics and Department of Dermatology and Skin Sciences, The University of British Columbia, Vancouver, British Columbia,Canada
| | - Saud Alobaida
- Department of Dermatology, King Faisal Specialist Hospital & Research Centre, Riyadh,Saudi Arabia
| | - Kin F Leong
- Pediatric Institute, Kuala Lumpur General Hospital, Kuala Lumpur,Malaysia
| | - Alex H C Wong
- Department of Family Medicine, The University of Calgary, Calgary, Alberta,Canada
| |
Collapse
|
7
|
Abstract
The discovery of novel autoantibodies related to idiopathic inflammatory myopathies (collectively referred to as myositis) has not only advanced our understanding of the clinical, serological, and pathological correlation in the disease spectrum but also played a role in guiding management and prognosis. One group of the myositis-specific autoantibodies is anti-aminoacyl-tRNA synthetase (anti-ARS or anti-synthetase) which defines a syndrome with predominant interstitial lung disease, arthritis, and myositis. Autoantibodies to eight aminoacyl-tRNA synthetases have been identified with anti-Jo1 the most common in all of idiopathic inflammatory myopathies. Disease presentation and prognosis vary depending on which anti-aminoacyl-tRNA synthetase antibody is present. In this review, we will discuss the clinical characteristics, overlap features with other autoimmune diseases, prognostic factors, and management of the antisynthetase syndrome.
Collapse
Affiliation(s)
- Kun Huang
- Division of Rheumatology, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Rohit Aggarwal
- Arthritis and Autoimmunity Center and UPMC Myositis Center, Division of Rheumatology and Clinical Immunology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| |
Collapse
|
8
|
Pancheri E, Lanzafame M, Zamò A, Angheben A, Sartoris S, Zorzi A, Boaretti M, Signoretto C, Guglielmi V, Ferrari S, Tonin P, Vattemi G. Benign acute viral myositis in African migrants: A clinical, serological, and pathological study. Muscle Nerve 2019; 60:586-590. [PMID: 31443116 DOI: 10.1002/mus.26679] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 08/17/2019] [Accepted: 08/20/2019] [Indexed: 11/06/2022]
Abstract
BACKGROUND Several viruses have been described as causes of acquired inflammatory myopathies; however, the mechanisms by which they cause muscle disease are still unclear. The aim of this study was to describe the laboratory features of benign acute myositis in a small case series. METHODS A detailed pathological and serological analysis was performed in five African migrants who developed an acute viral myositis complicated by rhabdomyolysis. RESULTS Muscle biopsies clearly documented an inflammatory myopathy with histological features similar to polymyositis including CD8+ T cells surrounding and invading nonnecrotic muscle fibers, CD68+ macrophages and major histocompatibility complex class I antigen upregulation. In addition, positivity for myositis-specific antibodies (MSA), in particular anti-aminoacyl tRNA synthetases, was found in the serum of two patients. CONCLUSIONS Our study demonstrated that T-cell mediated injury occurs in muscle of patients with acute viral myositis, and that MSA may be present in the serum of these patients.
Collapse
Affiliation(s)
- Elia Pancheri
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Clinical Neurology, University of Verona, Verona, Italy
| | - Massimiliano Lanzafame
- Department of General Medicine, Infectious Diseases and Tropical medicine Section, University of Verona, Verona, Italy
| | - Alberto Zamò
- Department of Pathology and Diagnostics, Section of Pathology, University of Verona, Verona, Italy
| | - Andrea Angheben
- Centre for Tropical Diseases, Sacro Cuore-Don Calabria Hospital, Negrar, Verona, Italy
| | - Silvia Sartoris
- Department of Medicine, Immunology Section, University of Verona, Italy
| | - Antonella Zorzi
- Department of Pathology and Diagnostics, Virology and Microbiology Unit, University of Verona, Italy
| | - Marzia Boaretti
- Department of Pathology and Diagnostics, Virology and Microbiology Unit, University of Verona, Italy
| | - Caterina Signoretto
- Department of Pathology and Diagnostics, Virology and Microbiology Unit, University of Verona, Italy
| | - Valeria Guglielmi
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Clinical Neurology, University of Verona, Verona, Italy
| | - Sergio Ferrari
- 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
| | - Gaetano Vattemi
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Clinical Neurology, University of Verona, Verona, Italy
| |
Collapse
|
9
|
Affiliation(s)
- Ignacio García-De La Torre
- Department of Immunology and Rheumatology, Hospital General de Occidente de la Secretaría de Salud, University of Guadalajara , Zapopan , México
| |
Collapse
|