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Zhou D, King EH, Rothwell S, Krystufkova O, Notarnicola A, Coss S, Abdul-Aziz R, Miller KE, Dang A, Yu GR, Drew J, Lundström E, Pachman LM, Mamyrova G, Curiel RV, De Paepe B, De Bleecker JL, Payton A, Ollier W, O'Hanlon TP, Targoff IN, Flegel WA, Sivaraman V, Oberle E, Akoghlanian S, Driest K, Spencer CH, Wu YL, Nagaraja HN, Ardoin SP, Chinoy H, Rider LG, Miller FW, Lundberg IE, Padyukov L, Vencovský J, Lamb JA, Yu CY. Low copy numbers of complement C4 and C4A deficiency are risk factors for myositis, its subgroups and autoantibodies. Ann Rheum Dis 2023; 82:235-245. [PMID: 36171069 PMCID: PMC9887400 DOI: 10.1136/ard-2022-222935] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 09/02/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND Idiopathic inflammatory myopathies (IIM) are a group of autoimmune diseases characterised by myositis-related autoantibodies plus infiltration of leucocytes into muscles and/or the skin, leading to the destruction of blood vessels and muscle fibres, chronic weakness and fatigue. While complement-mediated destruction of capillary endothelia is implicated in paediatric and adult dermatomyositis, the complex diversity of complement C4 in IIM pathology was unknown. METHODS We elucidated the gene copy number (GCN) variations of total C4, C4A and C4B, long and short genes in 1644 Caucasian patients with IIM, plus 3526 matched healthy controls using real-time PCR or Southern blot analyses. Plasma complement levels were determined by single radial immunodiffusion. RESULTS The large study populations helped establish the distribution patterns of various C4 GCN groups. Low GCNs of C4T (C4T=2+3) and C4A deficiency (C4A=0+1) were strongly correlated with increased risk of IIM with OR equalled to 2.58 (2.28-2.91), p=5.0×10-53 for C4T, and 2.82 (2.48-3.21), p=7.0×10-57 for C4A deficiency. Contingency and regression analyses showed that among patients with C4A deficiency, the presence of HLA-DR3 became insignificant as a risk factor in IIM except for inclusion body myositis (IBM), by which 98.2% had HLA-DR3 with an OR of 11.02 (1.44-84.4). Intragroup analyses of patients with IIM for C4 protein levels and IIM-related autoantibodies showed that those with anti-Jo-1 or with anti-PM/Scl had significantly lower C4 plasma concentrations than those without these autoantibodies. CONCLUSIONS C4A deficiency is relevant in dermatomyositis, HLA-DRB1*03 is important in IBM and both C4A deficiency and HLA-DRB1*03 contribute interactively to risk of polymyositis.
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Affiliation(s)
- Danlei Zhou
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio, USA,Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | - Emily H King
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio, USA,Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | - Simon Rothwell
- National Institute for Health Research Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, The University of Manchester, Manchester, UK,Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Olga Krystufkova
- Institute of Rheumatology and Department of Rheumatology, Charles University, Prague, Czech Republic
| | - Antonella Notarnicola
- Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet, University Hospital Karolinska, Stockholm, Sweden
| | - Samantha Coss
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio, USA,Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | - Rabheh Abdul-Aziz
- Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA,Division of Allergy/Immunology and Rheumatology, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, USA
| | - Katherine E Miller
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio, USA,Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | - Amanda Dang
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - G Richard Yu
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Joanne Drew
- Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | - Emeli Lundström
- Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet, University Hospital Karolinska, Stockholm, Sweden
| | - Lauren M Pachman
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Gulnara Mamyrova
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Rodolfo V Curiel
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Boel De Paepe
- Department of Neurology, Ghent University Hospital, Ghent, Belgium
| | | | - Antony Payton
- Division of Informatics, Imaging and Data Sciences, School of Health Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - William Ollier
- Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
| | - Terrance P O'Hanlon
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health, Bethesda, MD, USA
| | - Ira N Targoff
- Veteran’s Affairs Medical Center, University of Oklahoma Health Sciences Center, and Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Willy A Flegel
- Department of Transfusion Medicine, NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Vidya Sivaraman
- Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | - Edward Oberle
- Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | - Shoghik Akoghlanian
- Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | - Kyla Driest
- Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | | | - Yee Ling Wu
- Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA,Department of Microbiology and Immunology, Loyola University Chicago, Maywood, IL, USA
| | - Haikady N Nagaraja
- Division of Biostatistics, The Ohio State University, Columbus, Ohio, USA
| | - Stacy P Ardoin
- Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
| | - Hector Chinoy
- National Institute for Health Research Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, The University of Manchester, Manchester, UK,Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Lisa G Rider
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health, Bethesda, MD, USA
| | - Frederick W Miller
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health, Bethesda, MD, USA
| | - Ingrid E Lundberg
- Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet, University Hospital Karolinska, Stockholm, Sweden
| | - Leonid Padyukov
- Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet, University Hospital Karolinska, Stockholm, Sweden
| | - Jiří Vencovský
- Institute of Rheumatology and Department of Rheumatology, Charles University, Prague, Czech Republic
| | - Janine A Lamb
- Division of Population Health, Health Services Research and Primary Care, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Chack-Yung Yu
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio, USA,Division of Rheumatology, Nationwide Children’s Hospital and Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
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2
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Curiel RV, Nguyen W, Mamyrova G, Jones D, Ehrlich A, Brindle KA, Haji-Momenian S, Sheets R, Kim H, Jones OY, Rider LG, Chin AY, Dedeoglu F, DeMarco P, Gadina M, Hannan W, Jung L, Katz JD, Kim S, Lu S, Patel A, Ray L, Rouster‐Stevens K, Simon G, Son MB, Ting T, Tsai WL, Weiser P. Improvement in Disease Activity in Refractory Juvenile Dermatomyositis Following Abatacept Therapy. Arthritis Rheumatol 2023. [PMID: 36657109 DOI: 10.1002/art.42450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/29/2022] [Accepted: 01/03/2023] [Indexed: 01/21/2023]
Abstract
OBJECTIVE An open-label 24-week study was conducted to evaluate the safety and efficacy of abatacept in patients with refractory juvenile dermatomyositis (JDM). METHODS Ten patients >7 years of age with moderate disease activity were enrolled in a 24-week study to examine the safety and treatment response of subcutaneous abatacept. The primary endpoint was the International Myositis Assessment and Clinical Studies Group (IMACS) Definition of Improvement (DOI). Secondary endpoints included safety, change in core set activity measures (CSMs) of IMACS and Pediatric Rheumatology International Trials Organization (PRINTO), and the ACR-EULAR response criteria for JDM. Blinded radiologists assessed thigh magnetic resonance imaging (MRI). Interferon gene score (IFNGS) was performed on whole-blood RNA by NanoString and cytokines were assessed by Luminex. RESULTS Five patients achieved DOI at week 12, and nine achieved DOI at week 24, including two with minimal, four moderate, and three with major improvement by ACR-EULAR response criteria using IMACS CSMs. All CSMs improved from baseline at weeks 12 and 24, except muscle enzymes. Daily corticosteroid dose decreased from a mean of 16.7 mg at baseline to 10.2 mg at week 24 (p=0.002). Average MRI muscle edema score decreased from baseline 5.3 to 2.3 at week 24 (p=0.01). Six patients had down-trending IFNGS and galectin-9 at week 24. Decreases in IFNGS, IP-10, galectin-9 and IL-2 correlated with improvement in disease activity and in MRI muscle edema. Eleven Grade 2 or 3 treatment-emergent adverse events were observed. CONCLUSIONS This open-label study demonstrated abatacept may be beneficial for treatment-refractory JDM.
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Affiliation(s)
- Rodolfo V Curiel
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - William Nguyen
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Gulnara Mamyrova
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Derek Jones
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Alison Ehrlich
- Department of Dermatology, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Kathleen A Brindle
- Department of Radiology, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Shahriar Haji-Momenian
- Department of Radiology, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Robert Sheets
- Division of Allergy, Immunology and Rheumatology, Department of Pediatrics, University of California San-Diego, Rady Children's Hospital, San Diego, CA
| | - Hanna Kim
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC.,Juvenile Myositis Therapeutic and Translation Studies Unit (JMPTU), Pediatric Translation Research Branch (PTRB), National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) , National Institutes of Health (NIH), Bethesda, MD
| | - Olcay Y Jones
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC.,Division of Pediatric Rheumatology, Walter Reed National Military Medical Center, Bethesda, MD
| | - Lisa G Rider
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC.,Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences (NIEHS) , NIH, Bethesda, MD
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3
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Deakin CT, Bowes J, Rider LG, Miller FW, Pachman LM, Sanner H, Rouster-Stevens K, Mamyrova G, Curiel R, Feldman BM, Huber AM, Reed AM, Schmeling H, Cook CG, Marshall LR, Wilkinson MGL, Eyre S, Raychaudhuri S, Wedderburn LR. Association with HLA-DRβ1 position 37 distinguishes juvenile Dermatomyositis from adult-onset myositis. Hum Mol Genet 2022; 31:2471-2481. [PMID: 35094092 PMCID: PMC9307311 DOI: 10.1093/hmg/ddac019] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 01/14/2022] [Accepted: 01/17/2022] [Indexed: 11/13/2022] Open
Abstract
Abstract
Objectives
Juvenile dermatomyositis (JDM) is a rare, severe autoimmune disease and the most common idiopathic inflammatory myopathy (IIM) of children. JDM and adult-onset dermatomyositis (DM) have similar clinical, biological and serological features, although these features differ in prevalence between childhood-onset and adult-onset disease, suggesting age of disease onset may influence pathogenesis. Therefore, a JDM-focused genetic analysis was performed using the largest collection of JDM samples to date.
Methods
Caucasian JDM samples (n = 952) obtained via international collaboration were genotyped using the Illumina HumanCoreExome chip. Additional non-assayed HLA loci and genome-wide SNPs were imputed.
Results
HLA-DRB1*03:01 was confirmed as the classical HLA allele most strongly associated with JDM (OR 1.66; 95% CI 1.46, 1.89; P = 1.4 × 10−14), with an independent association at HLA-C*02:02 (OR = 1.74; 95% CI 1.42, 2.13, P = 7.13 × 10−8). Analyses of amino acid positions within HLA-DRB1 indicated the strongest association was at position 37 (omnibus P = 3.3 × 10−19), with suggestive evidence this association was independent of position 74 (omnibus P = 5.1 × 10−5), the position most strongly associated with adult-onset DM. Conditional analyses also suggested the association at position 37 of HLA-DRB1 was independent of some alleles of the Caucasian HLA 8.1 ancestral haplotype (AH8.1) such as HLA-DQB1*02:01 (OR = 1.62; 95% CI 1.36, 1.93; P = 8.70 × 10−8), but not HLA-DRB1*03:01 (OR = 1.49; 95% CR 1.24, 1.80; P = 2.24 × 10−5). No associations outside the HLA region were identified.
Conclusions
Our findings confirm previous associations with AH8.1 and HLA-DRB1*03:01, HLA-C*02:02 and identify a novel association with amino acid position 37 within HLA-DRB1 which may distinguish JDM from adult DM.
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Affiliation(s)
- Claire T Deakin
- Infection, Immunity and Inflammation Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, UK
- Centre for Adolescent Rheumatology Versus Arthritis at UCL, UCL Hospital and Great Ormond Street Hospital, London, UK
- NIHR Biomedical Research Centre at Great Ormond Street Hospital, London, UK
| | - John Bowes
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester, UK
| | - Lisa G Rider
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, Maryland, USA
| | - Frederick W Miller
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, Maryland, USA
| | - Lauren M Pachman
- Ann & Robert H. Lurie Children’s Hospital of Chicago, Northwestern University, Feinberg School of Medicine, Chicago, Illinois, USA
| | - Helga Sanner
- Department of Rheumatology, University of Oslo, Oslo, Norway
- Oslo New University College, Oslo, Norway
| | | | - Gulnara Mamyrova
- Division of Rheumatology, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Rodolfo Curiel
- Division of Rheumatology, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Brian M Feldman
- Division of Rheumatology, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Adam M Huber
- IWK Health Centre and Dalhousie University, Halifax, Nova Scotia, Canada
| | - Ann M Reed
- Pediatrics, Duke University, Durham, North Carolina, USA
| | - Heinrike Schmeling
- Alberta Children's Hospital and Department of Pediatrics, University of Calgary, Calgary, Alberta, Canada
| | - Charlotte G Cook
- Infection, Immunity and Inflammation Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, UK
| | - Lucy R Marshall
- Infection, Immunity and Inflammation Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, UK
- Centre for Adolescent Rheumatology Versus Arthritis at UCL, UCL Hospital and Great Ormond Street Hospital, London, UK
- NIHR Biomedical Research Centre at Great Ormond Street Hospital, London, UK
| | - Meredyth G Ll Wilkinson
- Infection, Immunity and Inflammation Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, UK
- Centre for Adolescent Rheumatology Versus Arthritis at UCL, UCL Hospital and Great Ormond Street Hospital, London, UK
- NIHR Biomedical Research Centre at Great Ormond Street Hospital, London, UK
| | - Stephen Eyre
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester, UK
| | - Soumya Raychaudhuri
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester, UK
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Lucy R Wedderburn
- Infection, Immunity and Inflammation Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, UK
- Centre for Adolescent Rheumatology Versus Arthritis at UCL, UCL Hospital and Great Ormond Street Hospital, London, UK
- NIHR Biomedical Research Centre at Great Ormond Street Hospital, London, UK
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4
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Mamyrova G, McBride E, Yao L, Shrader JA, Jain M, Yao J, Curiel RV, Miller FW, Harris-Love MO, Rider LG. Preliminary Validation of Muscle Ultrasound in Juvenile Dermatomyositis (JDM). Rheumatology (Oxford) 2021; 61:SI48-SI55. [PMID: 34791066 DOI: 10.1093/rheumatology/keab833] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 05/02/2021] [Accepted: 10/21/2021] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE To compare muscle ultrasound (MUS) parameters in patients with juvenile dermatomyositis (JDM) and healthy controls, and examine their association with JDM disease activity measures and magnetic resonance imaging (MRI). METHODS MUS of the right mid-rectus femoris was performed in 21 patients with JDM meeting probable or definite Bohan and Peter criteria and 28 demographically-matched healthy control subjects. MUS parameters were quantitated by digital image processing, and correlated with JDM disease activity measures and semi-quantitative thigh MRI short tau inversion recovery (STIR) and T1 scores. RESULTS Rectus femoris MUS echogenicity was increased (median 47.8 vs 38.5, p= 0.002) in patients with JDM compared with controls. Rectus femoris MUS echogenicity correlated with Physician Global Activity (PGA), Manual Muscle Testing (MMT), and Childhood Myositis Assessment Scale (CMAS) (rs 0.4-0.54). Some MUS parameters correlated with functional quantitative measures of muscle strength: resting RF area on MUS strongly correlated with knee extension quantitative muscle testing (QMT) (rs 0.76), and contracted area correlated with proximal MMT, knee extension QMT, and CMAS (rs 0.71-0.80). MUS echogenicity correlated with both STIR and T1 MRI (rs 0.43), and T1 MRI correlated inversely with RF contracted area (rs -0.49) on MUS. There were differences in pre- and post-exercise vascular power and colour Doppler on MUS in patients with JDM vs controls, with the percentage change of post-exercise vascular power Doppler lower in JDM compared with controls (7.1% vs 100.0%). CONCLUSIONS These data suggest MUS may be a valuable imaging modality to assess JDM disease activity and damage.
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Affiliation(s)
- Gulnara Mamyrova
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Erica McBride
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Lawrence Yao
- Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Joseph A Shrader
- Rehabilitation Medicine Department, Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Minal Jain
- Rehabilitation Medicine Department, Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Jianhua Yao
- Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Rodolfo V Curiel
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Frederick W Miller
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD, USA
| | - Michael O Harris-Love
- Rehabilitation Medicine Department, Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Lisa G Rider
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD, USA
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5
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Mamyrova G, Kishi T, Shi M, Targoff IN, Huber AM, Curiel RV, Miller FW, Rider LG. Anti-MDA5 autoantibodies associated with juvenile dermatomyositis constitute a distinct phenotype in North America. Rheumatology (Oxford) 2021; 60:1839-1849. [PMID: 33140079 DOI: 10.1093/rheumatology/keaa429] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 03/04/2020] [Revised: 06/03/2020] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE Myositis-specific autoantibodies have defined distinct phenotypes of patients with juvenile myositis (JIIM). We assessed the frequency and clinical significance of anti-melanoma differentiation-associated gene 5 (MDA5) autoantibody-associated JIIM in a North American registry. METHODS Retrospective examination of the characteristics of 35 JIIM patients with anti-MDA5 autoantibodies was performed, and differences from other myositis-specific autoantibody groups were evaluated. RESULTS Anti-MDA5 autoantibodies were present in 35/453 (7.7%) of JIIM patients and associated with older age at diagnosis, and lower serum creatine kinase and aldolase levels. Patients with anti-MDA5 autoantibodies had more frequent weight loss, adenopathy, arthritis, interstitial lung disease (ILD), and less frequent falling compared with anti-transcriptional intermediary factor 1 (TIF1), anti-nuclear matrix protein 2 (NXP2) and myositis-specific autoantibody/myositis-associated autoantibody-negative patients. They had a different season of diagnosis and less frequent mechanic's hands and ILD compared with those with anti-synthetase autoantibodies. Anti-MDA5 patients received fewer medications compared with anti-TIF1, and corticosteroid treatment was shorter compared with anti-TIF1 and anti-nuclear matrix protein 2 autoantibody groups. The frequency of remission was higher in anti-MDA5 than anti-synthetase autoantibody-positive JIIM. In multivariable analyses, weight loss, arthritis and arthralgia were most strongly associated with anti-MDA5 autoantibody-positive JIIM. CONCLUSION Anti-MDA5 JIIM is a distinct subset, with frequent arthritis, weight loss, adenopathy and less severe myositis, and is also associated with ILD. Anti-MDA5 is distinguished from anti-synthetase autoantibody-positive JIIM by less frequent ILD, lower creatine kinase levels and differing seasons of diagnosis. Anti-MDA5 has comparable outcomes, but with the ability to discontinue steroids more rapidly and less frequent flares compared with anti-TIF1 autoantibodies, and more frequent remission compared with anti-synthetase JIIM patients.
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Affiliation(s)
- Gulnara Mamyrova
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Takayuki Kishi
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD, USA
| | - Min Shi
- Biostatistics & Computational Biology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Ira N Targoff
- Veteran's Affairs Medical Center, University of Oklahoma Health Sciences Center, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Adam M Huber
- IWK Health Centre and Dalhousie University, Halifax, NS, Canada
| | - Rodolfo V Curiel
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Frederick W Miller
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD, USA
| | - Lisa G Rider
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD, USA
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6
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Tsaltskan V, Aldous A, Serafi S, Yakovleva A, Sami H, Mamyrova G, Targoff IN, Schiffenbauer A, Miller FW, Simmens SJ, Curiel R, Jones OY, Rider LG. Long-term outcomes in Juvenile Myositis patients. Semin Arthritis Rheum 2020; 50:149-155. [PMID: 31303436 PMCID: PMC6934928 DOI: 10.1016/j.semarthrit.2019.06.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/10/2019] [Accepted: 06/21/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Juvenile idiopathic inflammatory myopathies (JIIM) are rare, chronic autoimmune muscle diseases of childhood, with the potential for significant morbidity. Data on long-term outcomes is limited. In this study we investigate correlations between clinical and demographic features with long-term outcomes in a referral population of adult patients with JIIM. METHODS Forty-nine adults with JIIM were assessed at two referral centers between 1994 and 2016. Features of active disease and damage at a cross-sectional assessment were obtained. Regression modeling was used to examine factors associated with long-term outcomes, defined by the presence of calcinosis or a higher adjusted Myositis Damage Index (MDI) score. A multivariable model of MDI was constructed using factors that were statistically significant in bivariate models. RESULTS At a median of 11.5 [IQR 4.5-18.9] years following diagnosis, median American College of Rheumatology (ACR) functional class was 2 [1.5-3.0], Health Assessment Questionnaire (HAQ) score was 0.4 out of 3.0 [0.0-1.0], and manual muscle testing (MMT) score was 229 out of 260 [212.6-256.8]. Median MDI score was 6.0 [3.5-8.9], with the most commonly damaged organ systems being cutaneous and musculoskeletal. Factors associated with an elevated MDI score were the presence of erythroderma and other cutaneous manifestations, disease duration, and ACR functional class. Calcinosis was present in 55% of patients. The strongest predictors of calcinosis were disease duration, periungual capillary changes, and younger age at diagnosis. CONCLUSION In a tertiary referral population, long-term functional outcomes of JIIM are generally favorable, with HAQ scores indicative of mild disability. Although most patients had mild disease activity and virtually all had significant disease damage, severe or systemic damage was rare. Certain clinical features are associated with long-term damage and calcinosis.
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Affiliation(s)
- Vladislav Tsaltskan
- Division of Rheumatology, Department of Medicine, George Washington University, Washington, DC, United States
| | - Annette Aldous
- Department of Epidemiology and Biostatistics, George Washington University Milken Institute School of Public Health, Washington, DC, United States
| | - Sam Serafi
- Division of Rheumatology, Department of Medicine, George Washington University, Washington, DC, United States
| | - Anna Yakovleva
- Department of Epidemiology and Biostatistics, George Washington University Milken Institute School of Public Health, Washington, DC, United States
| | - Heidi Sami
- Division of Rheumatology, Department of Medicine, George Washington University, Washington, DC, United States
| | - Gulnara Mamyrova
- Division of Rheumatology, Department of Medicine, George Washington University, Washington, DC, United States
| | - Ira N Targoff
- Veterans Affairs Medical Center, University of Oklahoma Health Sciences Center, United States; Oklahoma Medical Research Foundation, Oklahoma City, OK, United States
| | - Adam Schiffenbauer
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD, United States
| | - Frederick W Miller
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD, United States
| | - Samuel J Simmens
- Department of Epidemiology and Biostatistics, George Washington University Milken Institute School of Public Health, Washington, DC, United States
| | - Rodolfo Curiel
- Division of Rheumatology, Department of Medicine, George Washington University, Washington, DC, United States
| | - Olcay Y Jones
- Division of Rheumatology, Department of Medicine, George Washington University, Washington, DC, United States; Department of Pediatrics, Walter Reed National Military Medical Center, Bethesda, MD, United States
| | - Lisa G Rider
- Division of Rheumatology, Department of Medicine, George Washington University, Washington, DC, United States; Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD, United States.
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Mamyrova G, Kishi T, Targoff IN, Ehrlich A, Curiel RV, Rider LG. Features distinguishing clinically amyopathic juvenile dermatomyositis from juvenile dermatomyositis. Rheumatology (Oxford) 2018; 57:1956-1963. [PMID: 30016492 PMCID: PMC6199536 DOI: 10.1093/rheumatology/key190] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 05/25/2018] [Indexed: 11/12/2022] Open
Abstract
Objective We examined features of clinically amyopathic JDM (CAJDM), in which patients have characteristic rashes with little to no evidence of muscle involvement, to determine whether this is a distinct phenotype from JDM. Methods Demographic, clinical, laboratory and treatment data from 12 (9 hypomyopathic, 3 amyopathic) patients meeting modified Sontheimer criteria for CAJDM and from 60 matched JDM patients meeting Bohan and Peter criteria were examined. Differences were evaluated by Fisher's exact and Mann-Whitney tests, random forests and logistic regression analysis. Results Nine (75%) CAJDM patients had anti-p155/140 (transcriptional intermediary factor 1), one (8.3%) anti-melanoma differentiation-associated gene 5 autoantibodies and two (16.7%) were myositis autoantibody negative. CAJDM patients were younger at diagnosis and frequently had mild disease at onset. CAJDM patients had less frequent myalgias, arthritis, contractures, calcinosis, dysphagia, abdominal pain and fatigue. The muscle, skeletal and overall clinical scores were lower in CAJDM. Serum muscle enzymes were less frequently increased in CAJDM, and peak values were lower. CAJDM patients received fewer medications compared with JDM patients. Only 50% of CAJDM patients received oral prednisone, but the maximum dose and treatment duration did not differ from JDM. At a median follow-up of 2.9 years, CAJDM patients had no documented functional disability, and none developed weakness, calcinosis, interstitial lung disease or lipodystrophy. Multivariable modelling revealed a lower skeletal score and less frequent myalgias as the most important factors in distinguishing CAJDM from JDM. Conclusion CAJDM may be distinguished from JDM, in that they often have p155/140 (transcriptional intermediary factor 1) autoantibodies, have fewer systemic manifestations and receive less therapy.
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Affiliation(s)
- Gulnara Mamyrova
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Takayuki Kishi
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD
| | - Ira N Targoff
- Veteran’s Affairs Medical Center, University of Oklahoma Health Sciences Center, and Oklahoma Medical Research Foundation, Oklahoma City, OK
| | - Alison Ehrlich
- Department of Dermatology, George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Rodolfo V Curiel
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Lisa G Rider
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD
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Kishi T, Bayat N, Ward MM, Huber AM, Wu L, Mamyrova G, Targoff IN, Warren-Hicks WJ, Miller FW, Rider LG. Medications received by patients with juvenile dermatomyositis. Semin Arthritis Rheum 2018; 48:513-522. [PMID: 29773230 DOI: 10.1016/j.semarthrit.2018.03.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [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: 11/16/2017] [Revised: 02/12/2018] [Accepted: 03/26/2018] [Indexed: 10/17/2022]
Abstract
OBJECTIVE Few controlled studies are available to guide treatment decisions in juvenile dermatomyositis (JDM). This study evaluated therapies received, changes of treatment over time, and factors associated with medication choices in JDM. METHODS We performed a retrospective analysis of the number and type of therapies and duration of treatment for 320 patients with JDM enrolled in a North American registry. Kaplan-Meier and logistic regression analysis were used to assess the association of demographic and clinical features and autoantibodies with medication usage. RESULTS High-dose oral prednisone was the primary therapy given to 99% of patients. 1997 was determined to be a threshold year for increasing usage of medications other than prednisone. The median time to half the initial oral prednisone dose was shorter in patients diagnosed after vs. before 1997 (10 vs. 19 months, P < 0.01). Patients received intravenous methylprednisolone (IVMP), methotrexate, intravenous immunoglobulin, antimalarial drugs, and combination therapy more frequently when diagnosed after 1997. IVMP was frequently received by patients with severe illness onset, anti-p155/140 (anti-TIF1) and anti-MJ (anti-NXP2) autoantibodies. Treatment with methotrexate was associated with older age at diagnosis and anti-MJ autoantibodies, while antimalarial therapy was associated with anti-p155/140 autoantibodies and mild onset severity. CONCLUSION Oral prednisone has been the mainstay of therapy in JDM, and prednisone was reduced faster in patients diagnosed after 1997 when there was also an increase in other medications. Specific medications received by patients with JDM correlated with year and age at diagnosis, myositis autoantibodies, onset severity, and illness features.
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Affiliation(s)
- Takayuki Kishi
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Building 10, Rm 4-2352, MSC 1301, 10 Center Drive, Bethesda, MD 20892-1301
| | - Nastaran Bayat
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Building 10, Rm 4-2352, MSC 1301, 10 Center Drive, Bethesda, MD 20892-1301
| | - Michael M Ward
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD
| | - Adam M Huber
- Division of Rheumatology, IWK Health Centre and Dalhousie University, Halifax, Nova Scotia, Canada
| | - Lan Wu
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Building 10, Rm 4-2352, MSC 1301, 10 Center Drive, Bethesda, MD 20892-1301
| | - Gulnara Mamyrova
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine, Washington, DC
| | - Ira N Targoff
- VA Medical Center, University of Oklahoma Health Sciences Center, and Oklahoma Medical Research Foundation, Oklahoma City, OK
| | | | - Frederick W Miller
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Building 10, Rm 4-2352, MSC 1301, 10 Center Drive, Bethesda, MD 20892-1301
| | - Lisa G Rider
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Building 10, Rm 4-2352, MSC 1301, 10 Center Drive, Bethesda, MD 20892-1301.
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Mamyrova G, Rider LG, Ehrlich A, Jones O, Pachman LM, Nickeson R, Criscone-Schreiber LG, Jung LK, Miller FW, Katz JD. Environmental factors associated with disease flare in juvenile and adult dermatomyositis. Rheumatology (Oxford) 2017; 56:1342-1347. [PMID: 28444299 DOI: 10.1093/rheumatology/kex162] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [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: 09/16/2016] [Indexed: 11/13/2022] Open
Abstract
Objective The aim was to assess environmental factors associated with disease flare in juvenile and adult dermatomyositis (DM). Methods An online survey of DM patients from the USA and Canada examined smoking, sun exposure, infections, medications, vaccines, stressful life events and physical activity during the 6 months before flares, or in the past 6 months in patients without flares. Differences were evaluated by χ 2 and Fisher's exact tests, and significant univariable results were examined in multivariable logistic regression. Residential locations before flare were correlated with the National Weather Service UV index. Results Of 210 participants (164 juvenile and 46 adult DM), 134 (63.8%) experienced a disease flare within 2 years of the survey. Subjects more often reported disease flare after sun exposure [odds ratio (OR) = 2.0, P = 0.03], although use of photoprotective measures did not differ between those with and without flare. Urinary tract infections (OR = 16.4, P = 0.005) and gastroenteritis (OR = 3.2, P = 0.04) were more frequent in the preceding 6 months in those who flared. Subjects who flared recently used NSAIDS (OR = 3.0, P = 0.0003), blood pressure medicines (OR = 3.5, P = 0.049) or medication for depression or mood changes (OR = 12.9, P = 0.015). Moving to a new house (OR = 10.3, P = 0.053) was more common in those who flared. Only sun exposure (OR = 2.2) and NSAIDs (OR = 1.9) were significant factors in multivariable analysis. Conclusion Certain classes of environmental agents that have been associated with the initiation of DM, including sun exposure and medications, may also play a role in disease flares.
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Affiliation(s)
- Gulnara Mamyrova
- Division of Rheumatology, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Lisa G Rider
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD
| | - Alison Ehrlich
- Department of Dermatology, George Washington University, Washington, DC
| | - Olcay Jones
- Pediatric Rheumatology, Department of Pediatrics, Walter Reed National Military Medical Center, Bethesda, MD
| | - Lauren M Pachman
- Pediatric Rheumatology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | | | | | - Lawrence K Jung
- Rheumatology, Children's National Medical Centre, Washington, DC
| | - Frederick W Miller
- Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Bethesda, MD
| | - James D Katz
- Division of Rheumatology, George Washington University School of Medicine and Health Sciences, Washington, DC.,National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
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10
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Habers GEA, Huber AM, Mamyrova G, Targoff IN, O'Hanlon TP, Adams S, Pandey JP, Boonacker C, van Brussel M, Miller FW, van Royen-Kerkhof A, Rider LG. Brief Report: Association of Myositis Autoantibodies, Clinical Features, and Environmental Exposures at Illness Onset With Disease Course in Juvenile Myositis. Arthritis Rheumatol 2016; 68:761-8. [PMID: 26474155 DOI: 10.1002/art.39466] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 10/01/2015] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To identify early factors associated with disease course in patients with juvenile idiopathic inflammatory myopathies (IIMs). METHODS Univariable and multivariable multinomial logistic regression analyses were performed in a large juvenile IIM registry (n = 365) and included demographic characteristics, early clinical features, serum muscle enzyme levels, myositis autoantibodies, environmental exposures, and immunogenetic polymorphisms. RESULTS Multivariable associations with chronic or polycyclic courses compared to a monocyclic course included myositis-specific autoantibodies (multinomial odds ratio [OR] 4.2 and 2.8, respectively), myositis-associated autoantibodies (multinomial OR 4.8 and 3.5), and a documented infection within 6 months of illness onset (multinomial OR 2.5 and 4.7). A higher overall clinical symptom score at diagnosis was associated with chronic or monocyclic courses compared to a polycyclic course. Furthermore, severe illness onset was associated with a chronic course compared to monocyclic or polycyclic courses (multinomial OR 2.1 and 2.6, respectively), while anti-p155/140 autoantibodies were associated with chronic or polycyclic courses compared to a monocyclic course (multinomial OR 3.9 and 2.3, respectively). Additional univariable associations of a chronic course compared to a monocyclic course included photosensitivity, V-sign or shawl sign rashes, and cuticular overgrowth (OR 2.2-3.2). The mean ultraviolet index and highest ultraviolet index in the month before diagnosis were associated with a chronic course compared to a polycyclic course in boys (OR 1.5 and 1.3), while residing in the Northwest was less frequently associated with a chronic course (OR 0.2). CONCLUSION Our findings indicate that myositis autoantibodies, in particular anti-p155/140, and a number of early clinical features and environmental exposures are associated with a chronic course in patients with juvenile IIM. These findings suggest that early factors, which are associated with poorer outcomes in juvenile IIM, can be identified.
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Affiliation(s)
| | - Adam M Huber
- IWK Health Center and Dalhousie University, Halifax, Nova Scotia, Canada
| | | | - Ira N Targoff
- VAMC, University of Oklahoma Health Sciences Center, and Oklahoma Medical Research Foundation, Oklahoma City
| | | | | | | | | | | | | | | | - Lisa G Rider
- National Institute of Environmental Health Sciences, NIH, Bethesda, MD
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11
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Huber AM, Mamyrova G, Lachenbruch PA, Lee JA, Katz JD, Targoff IN, Miller FW, Rider LG. Early illness features associated with mortality in the juvenile idiopathic inflammatory myopathies. Arthritis Care Res (Hoboken) 2014; 66:732-40. [PMID: 24151254 DOI: 10.1002/acr.22212] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 10/15/2013] [Indexed: 01/09/2023]
Abstract
OBJECTIVE Because juvenile idiopathic inflammatory myopathies (IIMs) are potentially life-threatening systemic autoimmune diseases, we examined risk factors for juvenile IIM mortality. METHODS Mortality status was available for 405 patients (329 with juvenile dermatomyositis [DM], 30 with juvenile polymyositis [PM], and 46 with juvenile connective tissue disease-associated myositis [CTM]) enrolled in nationwide protocols. Standardized mortality ratios (SMRs) were calculated using US population statistics. Cox regression analysis was used to assess univariable associations with mortality, and random survival forest (RSF) classification and Cox regression analysis were used for multivariable associations. RESULTS Of 17 deaths (4.2% overall mortality), 8 (2.4%) were in juvenile DM patients. Death was related to the pulmonary system (primarily interstitial lung disease [ILD]) in 7 patients, gastrointestinal system in 3, and multisystem in 3, and of unknown etiology in 4 patients. The SMR for juvenile IIMs overall was 14.4 (95% confidence interval [95% CI] 12.2-16.5) and was 8.3 (95% CI 6.4-10.3) for juvenile DM. The top mortality risk factors in the univariable analysis included clinical subgroup (juvenile CTM, juvenile PM), antisynthetase autoantibodies, older age at diagnosis, ILD, and Raynaud's phenomenon at diagnosis. In multivariable analyses, clinical subgroup, illness severity at onset, age at diagnosis, weight loss, and delay to diagnosis were the most important predictors from RSF; clinical subgroup and illness severity at onset were confirmed by multivariable Cox regression analysis. CONCLUSION Overall mortality was higher in juvenile IIM patients, and several early illness features were identified as risk factors. Clinical subgroup, antisynthetase autoantibodies, older age at diagnosis, and ILD are also recognized as mortality risk factors in adult myositis.
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Affiliation(s)
- Adam M Huber
- IWK Health Centre and Dalhousie University, Halifax, Nova Scotia, Canada
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12
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Habers GEA, Huber AM, Mamyrova G, O'Hanlon TP, Adams S, Pandey JP, Miller FW, Boonacker C, van Royen-Kerkhof A, Rider LG. A25: The Association of Immunogenetic and Environmental Factors with Disease Course in Patients with Juvenile Idiopathic Inflammatory Myopathies. Arthritis Rheumatol 2014. [DOI: 10.1002/art.38441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- G. Esther A. Habers
- Child Development and Exercise Center, Wilhelmina Children's Hospital, University Medical Center Utrecht; Utrecht Netherlands
| | | | - Gulnara Mamyrova
- Division of Rheumatology, Department of Medicine, George Washington University School of Medicine; Washington, D.C. MD
| | | | | | | | | | - Chantal Boonacker
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht; Utrecht Netherlands
| | - Annet van Royen-Kerkhof
- Department of Pediatric Immunology & Rheumatology, Wilhelmina Children's Hospital, University Medical Center Utrecht; Utrecht Netherlands
| | - Lisa G. Rider
- Environmental Autoimmunity Group, NIEHS, NIH; Bethesda MD
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Mamyrova G, Katz JD, Jones RV, Targoff IN, Lachenbruch PA, Jones OY, Miller FW, Rider LG. Clinical and laboratory features distinguishing juvenile polymyositis and muscular dystrophy. Arthritis Care Res (Hoboken) 2014; 65:1969-75. [PMID: 23925923 DOI: 10.1002/acr.22088] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Accepted: 07/26/2013] [Indexed: 01/17/2023]
Abstract
OBJECTIVE To differentiate juvenile polymyositis (PM) and muscular dystrophy, both of which may present with chronic muscle weakness and inflammation. METHODS We studied 39 patients with probable or definite juvenile PM and 9 patients with muscular dystrophies who were initially misdiagnosed as having juvenile PM. Differences in demographic, clinical, and laboratory results; outcomes; and treatment responses were evaluated by Fisher's exact and rank sum tests. Random forests classification analysis and logistic regression were performed to examine significant differences in multivariable models. RESULTS Clinical features and serum muscle enzyme levels were similar between juvenile PM and dystrophy patients, except 89% of dystrophy patients had muscle atrophy compared with 46% of juvenile PM patients. Dystrophy patients had a longer delay to diagnosis (median 12 versus 4 months) and were less frequently hospitalized than juvenile PM patients (22% versus 74%). No dystrophy patients, but 54% of juvenile PM patients, had a myositis autoantibody. Dystrophy patients more frequently had myopathic features on muscle biopsy, including diffuse variation of myofiber size, fiber hypertrophy, and myofiber fibrosis (44-100% versus 8-53%). Juvenile PM patients more frequently had complex repetitive discharges on electromyography and a complete response to treatment with prednisone or other immunosuppressive agents than dystrophy patients (44% versus 0%). Random forests analysis revealed that the most important features in distinguishing juvenile PM from dystrophies were myositis autoantibodies, clinical muscle atrophy, and myofiber size variation on biopsy. Logistic regression confirmed muscle atrophy, myofiber fibrosis, and hospitalization as significant predictors. CONCLUSION Muscular dystrophy can present similarly to juvenile PM. Selected clinical and laboratory features are helpful in combination in distinguishing these conditions.
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Abstract
The juvenile idiopathic inflammatory myopathies (JIIM) are systemic autoimmune diseases characterized by skeletal muscle weakness, characteristic rashes, and other systemic features. In follow-up to our study defining the major clinical subgroup phenotypes of JIIM, we compared demographics, clinical features, laboratory measures, and outcomes among myositis-specific autoantibody (MSA) subgroups, as well as with published data on adult idiopathic inflammatory myopathy patients enrolled in a separate natural history study. In the present study, of 430 patients enrolled in a nationwide registry study who had serum tested for myositis autoantibodies, 374 had either a single specific MSA (n = 253) or no identified MSA (n = 121) and were the subject of the present report. Following univariate analysis, we used random forest classification and exact logistic regression modeling to compare autoantibody subgroups. Anti-p155/140 autoantibodies were the most frequent subgroup, present in 32% of patients with juvenile dermatomyositis (JDM) or overlap myositis with JDM, followed by anti-MJ autoantibodies, which were seen in 20% of JIIM patients, primarily in JDM. Other MSAs, including anti-synthetase, anti-signal recognition particle (SRP), and anti-Mi-2, were present in only 10% of JIIM patients. Features that characterized the anti-p155/140 autoantibody subgroup included Gottron papules, malar rash, "shawl-sign" rash, photosensitivity, cuticular overgrowth, lowest creatine kinase (CK) levels, and a predominantly chronic illness course. The features that differed for patients with anti-MJ antibodies included muscle cramps, dysphonia, intermediate CK levels, a high frequency of hospitalization, and a monocyclic disease course. Patients with anti-synthetase antibodies had higher frequencies of interstitial lung disease, arthralgia, and "mechanic's hands," and had an older age at diagnosis. The anti-SRP group, which had exclusively juvenile polymyositis, was characterized by high frequencies of black race, severe onset, distal weakness, falling episodes, Raynaud phenomenon, cardiac involvement, high CK levels, chronic disease course, frequent hospitalization, and wheelchair use. Characteristic features of the anti-Mi-2 subgroup included Hispanic ethnicity, classic dermatomyositis and malar rashes, high CK levels, and very low mortality. Finally, the most common features of patients without any currently defined MSA or myositis-associated autoantibodies included linear extensor erythema, arthralgia, and a monocyclic disease course. Several demographic and clinical features were shared between juvenile and adult idiopathic inflammatory myopathy subgroups, but with several important differences. We conclude that juvenile myositis is a heterogeneous group of illnesses with distinct autoantibody phenotypes defined by varying clinical and demographic characteristics, laboratory features, and outcomes.
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Affiliation(s)
- Lisa G Rider
- From Environmental Autoimmunity Group (LGR, MS, GM, FWM), Program of Clinical Research, National Institute of Environmental Health Sciences, National Institutes of Health, DHHS, Bethesda, Maryland; Department of Epidemiology and Biostatistics (MS, MMR) and Division of Rheumatology, Department of Medicine (GM), George Washington University School of Medicine, Washington, DC; Veteran's Affairs Medical Center (INT), University of Oklahoma Health Sciences Center, and Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States; and IWK Health Center and Dalhousie University (AMH), Halifax, Nova Scotia, Canada
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Abstract
The juvenile idiopathic inflammatory myopathies (JIIM) are systemic autoimmune diseases characterized by skeletal muscle weakness, characteristic rashes, and other systemic features. Although juvenile dermatomyositis (JDM), the most common form of JIIM, has been well studied, the other major clinical subgroups of JIIM, including juvenile polymyositis (JPM) and juvenile myositis overlapping with another autoimmune or connective tissue disease (JCTM), have not been well characterized, and their similarity to the adult clinical subgroups is unknown. We enrolled 436 patients with JIIM, including 354 classified as JDM, 33 as JPM, and 49 as JCTM, in a nationwide registry study. The aim of the study was to compare demographics; clinical features; laboratory measures, including myositis autoantibodies; and outcomes among these clinical subgroups, as well as with published data on adult patients with idiopathic inflammatory myopathies (IIM) enrolled in a separate natural history study. We used random forest classification and logistic regression modeling to compare clinical subgroups, following univariate analysis. JDM was characterized by typical rashes, including Gottron papules, heliotrope rash, malar rash, periungual capillary changes, and other photosensitive and vasculopathic skin rashes. JPM was characterized by more severe weakness, higher creatine kinase levels, falling episodes, and more frequent cardiac disease. JCTM had more frequent interstitial lung disease, Raynaud phenomenon, arthralgia, and malar rash. Differences in autoantibody frequency were also evident, with anti-p155/140, anti-MJ, and anti-Mi-2 seen more frequently in patients with JDM, anti-signal recognition particle and anti-Jo-1 in JPM, and anti-U1-RNP, PM-Scl, and other myositis-associated autoantibodies more commonly present in JCTM. Mortality was highest in patients with JCTM, whereas hospitalizations and wheelchair use were highest in JPM patients. Several demographic and clinical features were shared between juvenile and adult IIM subgroups. However, JDM and JPM patients had a lower frequency of interstitial lung disease, Raynaud phenomenon, "mechanic's hands" and carpal tunnel syndrome, and lower mortality than their adult counterparts. We conclude that juvenile myositis is a heterogeneous group of illnesses with distinct clinical subgroups, defined by varying clinical and demographic characteristics, laboratory features, and outcomes.
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Affiliation(s)
- Mona Shah
- From the Environmental Autoimmunity Group (MS, GM, FWM, LGR), Program of Clinical Research, National Institute of Environmental Health Sciences; Center for Information Technology (JDM), National Institutes of Health, DHHS, Bethesda, Maryland; Department of Epidemiology and Biostatistics (MS, MMR) and Division of Rheumatology, Department of Medicine(GM), George Washington University School of Medicine, Washington, DC; IWK Health Center and Dalhousie University (AMH), Halifax, Nova Scotia, Canada; and Veteran's Affairs Medical Center (INT), University of Oklahoma Health Sciences Center, and Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
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Katz JD, Mamyrova G, Agarwal S, Jones OY, Bollar H, Huber AM, Rider LG, White PH. Parents' perception of self-advocacy of children with myositis: an anonymous online survey. Pediatr Rheumatol Online J 2011; 9:10. [PMID: 21649897 PMCID: PMC3118375 DOI: 10.1186/1546-0096-9-10] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Accepted: 06/07/2011] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Children with complex medical issues experience barriers to the transition of care from pediatric to adult providers. We sought to identify these barriers by elucidating the experiences of patients with idiopathic inflammatory muscle disorders. METHODS We collected anonymous survey data using an online website. Patients and their families were solicited from the US and Canada through established clinics for children with idiopathic inflammatory muscle diseases as well as with the aid of a nonprofit organization for the benefit of such individuals. The parents of 45 older children/young adults suffering from idiopathic inflammatory muscle diseases were surveyed. As a basis of comparison, we similarly collected data from the parents of 207 younger children with inflammatory muscle diseases. The survey assessed transition of care issues confronting families of children and young adults with chronic juvenile myositis. RESULTS Regardless of age of the patient, respondents were unlikely to have a designated health care provider assigned to aid in transition of care and were unlikely to be aware of a posted policy concerning transition of care at their pediatrician's office. Additionally, regardless of age, patients and their families were unlikely to have a written plan for moving to adult care. CONCLUSIONS We identified deficiencies in the health care experiences of families as pertain to knowledge, self-advocacy, policy, and vocational readiness. Moreover, as children with complex medical issues grow up, parents attribute less self-advocacy to their children's level of independence.
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Affiliation(s)
- James D Katz
- Division of Rheumatology, The George Washington University, Washington, DC, USA.
| | - Gulnara Mamyrova
- Division of Rheumatology, The George Washington University, Washington, DC, USA
| | - Shilpi Agarwal
- Glendale Adventist Family Medicine Residency, Glendale, CA 91205, USA
| | - Olcay Y Jones
- Walter Reed Army Medical Center, Washington, DC 20307, USA
| | | | - Adam M Huber
- IWK Health Centre and Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | | | - Patience H White
- Division of Rheumatology, The George Washington University, Washington, DC, USA
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Rider LG, Wu L, Mamyrova G, Targoff IN, Miller FW. Environmental factors preceding illness onset differ in phenotypes of the juvenile idiopathic inflammatory myopathies. Rheumatology (Oxford) 2010; 49:2381-90. [PMID: 20802007 PMCID: PMC2981509 DOI: 10.1093/rheumatology/keq277] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Objective. To assess whether certain environmental factors temporally associated with the onset of juvenile idiopathic inflammatory myopathies (JIIMs) differ between phenotypes. Methods. Physicians completed questionnaires regarding documented infections, medications, immunizations and an open-ended question about other noted exposures within 6 months before illness onset for 285 patients with probable or definite JIIM. Medical records were reviewed for 81% of the patients. Phenotypes were defined by standard clinical and laboratory measures. Results. Sixty per cent of JIIM patients had a reported exposure within 6 months before illness onset. Most patients (62%) had one recorded exposure, 26% had two and 12% had three to five exposures. Patients older than the median age at diagnosis, those with a longer delay to diagnosis and those with anti-signal recognition particle autoantibodies had a higher frequency of documented exposures [odds ratios (ORs) 95% CI 3.4, 31]. Infections were the most common exposure and represented 44% of the total number of reported exposures. Non-infectious exposures included medications (18%), immunizations (11%), stressful life events (11%) and unusual sun exposure (7%). Exposures varied by age at diagnosis, race, disease course and the presence of certain myositis autoantibodies. Conclusion. The JIIMs may be related to multiple exposures and these appear to vary among phenotypes.
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Affiliation(s)
- Lisa G Rider
- Environmental Autoimmunity Group, National Institute of Environmental Sciences, National Institutes of Health, DHHS, Clinical Research Center Room 4-2352, 10 Center Drive, MSC 1301, Bethesda, MD 20892-1301, USA.
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Abstract
Mechanisms are needed to assess learning in the context of graduate medical education. In general, research in this regard is focused on the individual learner. At the level of the group, learning assessment can also inform practice-based learning and may provide the foundation for whole systems improvement. The authors present the results of a random forests classification analysis of the diagnostic skill of rheumatology trainees as compared with rheumatology attendings. A random forests classification analysis is a novel statistical approach that captures the strength of alignment of thinking between student and teacher. It accomplishes this by providing information about the strength and correlation of multiple variables.
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Affiliation(s)
- James D Katz
- The George Washington University, Washington, DC 20037, USA.
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Mamyrova G, O'Hanlon TP, Sillers L, Malley K, James-Newton L, Parks CG, Cooper GS, Pandey JP, Miller FW, Rider LG. Cytokine gene polymorphisms as risk and severity factors for juvenile dermatomyositis. ACTA ACUST UNITED AC 2009; 58:3941-50. [PMID: 19035492 DOI: 10.1002/art.24039] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE To study tumor necrosis factor alpha (TNFalpha) and interleukin-1 (IL-1) cytokine polymorphisms as possible risk and protective factors, define their relative importance, and examine these as severity factors in patients with juvenile dermatomyositis (DM). METHODS TNFalpha and IL-1 cytokine polymorphism and HLA typing were performed in 221 Caucasian patients with juvenile DM, and the results were compared with those in 203 ethnically matched healthy volunteers. RESULTS The genotypes TNFalpha -308AG (odds ratio [OR] 3.6), TNFalpha -238GG (OR 3.5), and IL-1alpha +4845TT (OR 2.2) were risk factors, and TNFalpha -308GG (OR 0.26) as well as TNFalpha -238AG (OR 0.22) were protective, for the development of juvenile DM. Carriage of a single copy of the TNFalpha -308A (OR 3.8) or IL-1beta +3953T (OR 1.7) allele was a risk factor, and the TNFalpha -238A (OR 0.29) and IL-1alpha +4845G (OR 0.46) alleles were protective, for juvenile DM. Random Forests classification analysis showed HLA-DRB1*03 and TNFalpha -308A to have the highest relative importance as risk factors for juvenile DM compared with the other alleles (Gini scores 100% and 90.7%, respectively). TNFalpha -308AA (OR 7.3) was a risk factor, and carriage of the TNFalpha -308G (OR 0.14) and IL-1alpha -889T (OR 0.41) alleles was protective, for the development of calcinosis. TNFalpha -308AA (OR 7.0) was a possible risk factor, and carriage of the TNFalpha -308G allele (OR 0.14) was protective, for the development of ulcerations. None of the studied TNFalpha, IL-1alpha, and IL-1beta polymorphisms were associated with the disease course, disease severity at the time of diagnosis, or the patient's sex. CONCLUSION TNFalpha and IL-1 genetic polymorphisms contribute to the development of juvenile DM and may also be indicators of disease severity.
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Affiliation(s)
- Gulnara Mamyrova
- National Institute of Environmental Health Sciences, NIH, Bethesda, Maryland 20892-1301, USA
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Bingham A, Mamyrova G, Rother KI, Oral E, Cochran E, Premkumar A, Kleiner D, James-Newton L, Targoff IN, Pandey JP, Carrick DM, Sebring N, O’Hanlon TP, Ruiz-Hidalgo M, Turner M, Gordon LB, Laborda J, Bauer SR, Blackshear PJ, Imundo L, Miller FW, Rider LG. Predictors of acquired lipodystrophy in juvenile-onset dermatomyositis and a gradient of severity. Medicine (Baltimore) 2008; 87:70-86. [PMID: 18344805 PMCID: PMC2674585 DOI: 10.1097/md.0b013e31816bc604] [Citation(s) in RCA: 123] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We describe the clinical features of 28 patients with juvenile dermatomyositis (JDM) and 1 patient with adult-onset dermatomyositis (DM), all of whom developed lipodystrophy (LD) that could be categorized into 1 of 3 phenotypes, generalized, partial, or focal, based on the pattern of fat loss distribution. LD onset was often delayed, beginning a median of 4.6 years after diagnosis of DM. Calcinosis, muscle atrophy, joint contractures, and facial rash were DM disease features found to be associated with LD. Panniculitis was associated with focal lipoatrophy while the anti-p155 autoantibody, a newly described myositis-associated autoantibody, was more associated with generalized LD. Specific LD features such as acanthosis nigricans, hirsutism, fat redistribution, and steatosis/nonalcoholic steatohepatitis were frequent in patients with LD, in a gradient of frequency and severity among the 3 sub-phenotypes. Metabolic studies frequently revealed insulin resistance and hypertriglyceridemia in patients with generalized and partial LD. Regional fat loss from the thighs, with relative sparing of fat loss from the medial thighs, was more frequent in generalized than in partial LD and absent from DM patients without LD. Cytokine polymorphisms, the C3 nephritic factor, insulin receptor antibodies, and lamin mutations did not appear to play a pathogenic role in the development of LD in our patients. LD is an under-recognized sequela of JDM, and certain DM patients with a severe, prolonged clinical course and a high frequency of calcinosis appear to be at greater risk for the development of this complication. High-risk JDM patients should be screened for metabolic abnormalities, which are common in generalized and partial LD and result in much of the LD-associated morbidity. Further study is warranted to investigate the pathogenesis of acquired LD in patients with DM.
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Mamyrova G, Kleiner DE, James-Newton L, Shaham B, Miller FW, Rider LG. Late-onset gastrointestinal pain in juvenile dermatomyositis as a manifestation of ischemic ulceration from chronic endarteropathy. ACTA ACUST UNITED AC 2007; 57:881-4. [PMID: 17530691 PMCID: PMC2099313 DOI: 10.1002/art.22782] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gulnara Mamyrova
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, Department of Health and Human Services, Bethesda, MD
| | - David E. Kleiner
- National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD
| | - Laura James-Newton
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, Department of Health and Human Services, Bethesda, MD
| | - Bracha Shaham
- University of Southern California School of Medicine, Division of Rheumatology, Children's Hospital, Los Angeles, California
| | - Frederick W. Miller
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, Department of Health and Human Services, Bethesda, MD
| | - Lisa G. Rider
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, Department of Health and Human Services, Bethesda, MD
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Mamyrova G, O’Hanlon TP, Monroe JB, Carrick DM, Malley JD, Adams S, Reed AM, Shamim EA, James‐Newton L, Miller FW, Rider LG. Immunogenetic risk and protective factors for juvenile dermatomyositis in Caucasians. ACTA ACUST UNITED AC 2007; 54:3979-87. [PMID: 17133612 PMCID: PMC2063456 DOI: 10.1002/art.22216] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To define the relative importance (RI) of class II major histocompatibility complex (MHC) alleles and peptide binding motifs as risk or protective factors for juvenile dermatomyositis (DM), and to compare these with HLA associations in adult DM. METHODS DRB1 and DQA1 typing was performed in 142 Caucasian patients with juvenile DM, and the results were compared with HLA typing data from 193 patients with adult DM and 797 race-matched controls. Random Forests classification and multiple logistic regression were used to assess the RI of the HLA associations. RESULTS The HLA-DRB1*0301 allele was a primary risk factor (odds ratio [OR] 3.9), while DQA1*0301 (OR 2.8), DQA1*0501 (OR 2.1), and homozygosity for DQA1*0501 (OR 3.2) were additional risk factors for juvenile DM. These risk factors were not present in patients with adult DM without defined autoantibodies. DQA1 alleles *0201 (OR 0.37), *0101 (OR 0.38), and *0102 (OR 0.51) were identified as novel protective factors for juvenile DM, the latter 2 also being protective factors in adult DM. The peptide binding motif DRB1 (9)EYSTS(13) was a risk factor, and DQA1 motifs F(25), S(26), and (45)(V/A)W(R/K)(47) were protective. Random Forests classification analysis revealed that among the identified risk factors for juvenile DM, DRB1*0301 had a higher RI (100%) than DQA1*0301 (RI 57%), DQA1*0501 (RI 42%), or the peptide binding motifs. In a logistic regression model, DRB1*0301 and DQA1*0201 were the strongest risk and protective factors, respectively, for juvenile DM. CONCLUSION DRB1*0301 is ranked higher in RI than DQA1*0501 as a risk factor for juvenile DM. DQA1*0301 is a newly identified HLA risk factor for juvenile DM, while 3 of the DQA1 alleles studied are newly identified protective factors for juvenile DM.
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Affiliation(s)
- Gulnara Mamyrova
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, DHHS, Bethesda, MD
| | - Terrance P. O’Hanlon
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, DHHS, Bethesda, MD
| | - Jason B. Monroe
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, DHHS, Bethesda, MD
| | | | | | - Sharon Adams
- Department of Transfusion Medicine, National Institutes of Health, DHHS, Bethesda, MD
| | | | - Ejaz A. Shamim
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, DHHS, Bethesda, MD
| | - Laura James‐Newton
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, DHHS, Bethesda, MD
| | - Frederick W. Miller
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, DHHS, Bethesda, MD
| | - Lisa G. Rider
- Environmental Autoimmunity Group, National Institute of Environmental Health Sciences, DHHS, Bethesda, MD
- Corresponding Author and Reprint Requests: Lisa G. Rider, MD, Environmental Autoimmunity Group, National Institute of Environmental Sciences, National Institutes of Health, DHHS, Clinical Research Center Room 4‐2352, 10 Center Drive, MSC 1301, Bethesda, MD 20892‐1301, Phone: (301) 451‐6272, Fax: (301) 451‐5588,
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O'Hanlon TP, Rider LG, Mamyrova G, Targoff IN, Arnett FC, Reveille JD, Carrington M, Gao X, Oddis CV, Morel PA, Malley JD, Malley K, Shamim EA, Chanock SJ, Foster CB, Bunch T, Reed AM, Love LA, Miller FW. HLA polymorphisms in African Americans with idiopathic inflammatory myopathy: allelic profiles distinguish patients with different clinical phenotypes and myositis autoantibodies. ACTA ACUST UNITED AC 2006; 54:3670-81. [PMID: 17075818 DOI: 10.1002/art.22205] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate possible associations of HLA polymorphisms with idiopathic inflammatory myopathy (IIM) in African Americans, and to compare this with HLA associations in European American IIM patients with IIM. METHODS Molecular genetic analyses of HLA-A, B, Cw, DRB1, and DQA1 polymorphisms were performed in a large population of African American patients with IIM (n = 262) in whom the major clinical and autoantibody subgroups were represented. These data were compared with similar information previously obtained from European American patients with IIM (n = 571). RESULTS In contrast to European American patients with IIM, African American patients with IIM, in particular those with polymyositis, had no strong disease associations with HLA alleles of the 8.1 ancestral haplotype; however, African Americans with dermatomyositis or with anti-Jo-1 autoantibodies shared the risk factor HLA-DRB1*0301 with European Americans. We detected novel HLA risk factors in African American patients with myositis overlap (DRB1*08) and in African American patients producing anti-signal recognition particle (DQA1*0102) and anti-Mi-2 autoantibodies (DRB1*0302). DRB1*0302 and the European American-, anti-Mi-2-associated risk factor DRB1*0701 were found to share a 4-amino-acid sequence motif, which was predicted by comparative homology analyses to have identical 3-dimensional orientations within the peptide-binding groove. CONCLUSION These data demonstrate that North American IIM patients from different ethnic groups have both shared and distinct immunogenetic susceptibility factors, depending on the clinical phenotype. These findings, obtained from the largest cohort of North American minority patients with IIM studied to date, add additional support to the hypothesis that the myositis syndromes comprise multiple, distinct disease entities, perhaps arising from divergent pathogenic mechanisms and/or different gene-environment interactions.
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Affiliation(s)
- Terrance P O'Hanlon
- National Institute of Environmental Health Sciences, Bethesda, Maryland 20892, USA.
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Targoff IN, Mamyrova G, Trieu EP, Perurena O, Koneru B, O'Hanlon TP, Miller FW, Rider LG. A novel autoantibody to a 155-kd protein is associated with dermatomyositis. ACTA ACUST UNITED AC 2006; 54:3682-9. [PMID: 17075819 DOI: 10.1002/art.22164] [Citation(s) in RCA: 313] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE In polymyositis and dermatomyositis (DM), identified autoantibodies occur in <50% of adult patients and in a smaller proportion of children. This study was undertaken as part of a larger effort to define novel autoantibodies that assist in the clinical evaluation of myositis. METHODS Sera from children and adults satisfying criteria for idiopathic inflammatory myopathies and from patients with other connective tissue diseases (CTDs), patients with noninflammatory myopathies, and healthy individuals were tested for autoantibodies by immunoprecipitation (IP). A previously unrecognized autoantibody that immunoprecipitated a 155-kd protein along with a weaker 140-kd protein was seen. When the presence of this anti-p155 autoantibody in test sera was suggested based on IP results, it was confirmed by immunoblotting of immunoprecipitates. RESULTS Sera from 51 of 244 myositis patients (21%), including 30 with juvenile DM (29%), 5 with juvenile CTD-associated myositis (33%), 8 with adult DM (21%), 6 with cancer-associated DM (75%), and 2 with adult CTD-associated myositis (15%), were found to have anti-p155 autoantibody. One of 49 patients with lupus, and none of 89 others without myositis, had anti-p155. Caucasian patients with anti-p155 had a unique HLA risk factor, DQA1*0301 (odds ratio 5.4, corrected P = 0.004). In adults with anti-p155, of several clinical features assessed only the frequency of V-sign rash was increased, but patients with this antibody were clinically distinct from those with autoantibodies to aminoacyl-transfer RNA synthetases. CONCLUSION A newly recognized autoantibody, anti-p155, is associated with DM and cancer-associated DM, and is one of the most common autoantibodies in this condition, occurring as frequently in children as in adults. The clinical features and immunogenetics associated with anti-p155 differ from those associated with antisynthetases.
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