Abstract Number: 0085 • ACR Convergence 2020
Classifications of Inflammatory Myopathies: Differentially Expressed Membrane-Bound Complement Regulators Allow Specific Patterns of Membrane Attack Complex Deposition
Background/Purpose: Idiopathic inflammatory myopathies (IIM) are a group of heterogeneous disorders that typically present with proximal muscle weakness. According to the classification criteria, IMs are…Abstract Number: 1086 • ACR Convergence 2020
The Diagnostic Value and Clinical Significance of Myositis-Specific Antibodies in Patients Suspected to Have Autoimmune Myopathies and/or Autoimmune Rheumatic Diseases
Background/Purpose: Myositis-specific antibodies (MSA) are thought to be highly specific in patients with idiopathic inflammatory myopathies.[1] However, in clinical practice these antibodies are frequently found…Abstract Number: 0932 • ACR Convergence 2020
Skeletal Muscle Involvement in Systemic Sclerosis Predisposes to Severe Gastrointestinal Tract and Cardiac Muscle Disease
Background/Purpose: Tissues containing muscle cells are affected in systemic sclerosis (SSc) patients in different organ systems: skeletal muscle, cardiac muscle and gastrointestinal (GI) smooth muscle. …Abstract Number: 1088 • ACR Convergence 2020
Recruitment Rates of Virtual Remote Research (Tele-Research) in Myositis
Background/Purpose: There is a paucity of randomized, controlled clinical trials in myositis. Subject enrollment and retention in clinical trials for this rare, heterogeneous disease has…Abstract Number: 0933 • ACR Convergence 2020
Advanced Multiparametric Magnetic Resonance Imaging of Muscle for Detection and Quantification of Muscle Disease in Systemic Sclerosis
Background/Purpose: Skeletal myopathy in systemic sclerosis (SSc) is underappreciated yet an important manifestation of SSc. While it has been reported that there are distinct histopathologic…Abstract Number: 1096 • ACR Convergence 2020
Assessing Interstitial Lung Disease in a Racially Diverse Population with Idiopathic Inflammatory Myositis
Background/Purpose: Interstitial lung disease (ILD) is a common extra-muscular manifestation of Idiopathic Inflammatory Myositis (IIM) and increases risk of mortality. Prior studies and registries have focused on either smaller cohorts or predominantly Caucasian/European populations. Our aim was to better characterize the…Abstract Number: 0958 • ACR Convergence 2020
Tocilizumab in Myositis: Results of a Phase IIb Double-Blind Randomized Controlled Trial
Background/Purpose: To assess the efficacy and tolerability of tocilizumab (anti-IL-6R, TCZ), in a multi-center, randomized, double blind, placebo-controlled trial in refractory adult dermatomyositis (DM) and…Abstract Number: 1097 • ACR Convergence 2020
Immunophenotypic Characterization of Myeloid Derived Supressor Cells (MDSCs) and Their Relationship to the Clinical Characteristics of Patients with Inflammatory Myopathies
Background/Purpose: Myeloid derived suppressor cells (MDSCs) including their granulocyte (Gr-MDSCs) and monocyte (Mo-MDSCs) subtypes constitute a cellular subset with potent immune regulatory capacity. An augmented…Abstract Number: 0995 • ACR Convergence 2020
Jo-1-Binding B Cells Undergo Limited Class-Switching but Are Biased Towards Autoreactive-Prone and Memory B Cell Subsets in Anti-histidyl-tRNA Synthetase Syndrome
Background/Purpose: Idiopathic inflammatory myopathies (IIM) are systemic autoimmune diseases traditionally classified as dermatomyositis or polymyositis, but these disorders are increasingly defined by the presence of…Abstract Number: 1098 • ACR Convergence 2020
Anti-cortactin Autoantibodies Are Associated with Key Clinical Features in Adult Myositis but Are Rarely Present in Juvenile Myositis
Background/Purpose: To define the prevalence and clinical phenotype of anti-cortactin autoantibodies in adult and juvenile myositis.Methods: In this longitudinal cohort study, anti-cortactin autoantibody tiers were…Abstract Number: 1057 • ACR Convergence 2020
Earlier Cancer Diagnosis After Idiopathic Inflammatory Myopathy Onset Is Associated with Improved Long Term Survival – Results from Four European Cohorts
Background/Purpose: The idiopathic inflammatory myopathies (IIMs) are strongly associated with the development of clinically detectable cancer. Cancer screening has therefore been advocated in newly diagnosed…Abstract Number: 1060 • ACR Convergence 2020
B-cell-rich Inflammatory Myopathies in Adults: Striking Association with Connective Tissue Diseases
Background/Purpose: Myositis with significant B-cell infiltrates on muscle biopsy has scarcely been described in adults. Radke (2018) found B cells in adult dermatomyositis (DM) and…Abstract Number: 1061 • ACR Convergence 2020
Daily Myositis Symptom Changes Collected via a Smartphone-Based App Are Associated with Flare Occurrence – Providing Evidence of Potential Digital Biomarkers
Background/Purpose: The concept of idiopathic inflammatory myopathy (IIM) flare is widely used, although no consensus definition exists. Studies have demonstrated the feasibility and utility of…Abstract Number: 1062 • ACR Convergence 2020
Dermatomyositis: A Dermatology-Rheumatology Clinic Retrospective Analysis
Background/Purpose: Dermatomyositis (DM) can be categorized into two major subtypes: clinically amyopathic dermatomyositis (CADM) and classic dermatomyositis (CDM). In this study, we aimed to identify characteristics…Abstract Number: 1064 • ACR Convergence 2020
Anti-SMN Autoantibodies Are Associated with Systemic Sclerosis Small Bowel Involvement in anti-U1RNP Positive Autoimmune Myositis
Background/Purpose: The survival of motor neuron (SMN)/gemin proteins are components of a multifunctional protein complex that plays an essential role in RNA metabolism. SMN is…
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