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idiopathic inflammatory myopathy

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https://www.readbyqxmd.com/read/29651121/classification-of-myositis
#1
REVIEW
Ingrid E Lundberg, Marianne de Visser, Victoria P Werth
The idiopathic inflammatory myopathies (IIMs; also known as myositis) are a heterogeneous group of disorders in which a common feature is chronic inflammation of skeletal muscle, leading to muscle weakness. Other organs are frequently affected in IIMs, such as the skin, joints, lungs, gastrointestinal tract and heart, contributing to morbidity and mortality. Currently, IIMs are most often subclassified into polymyositis, dermatomyositis and inclusion body myositis, but this subclassification has limitations as these subgroups often have overlapping clinical and histopathological features, and outcomes vary within the subgroups; additionally, subgroups without considerable myopathy are not included...
April 12, 2018: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/29651119/update-on-outcome-assessment-in-myositis
#2
REVIEW
Lisa G Rider, Rohit Aggarwal, Pedro M Machado, Jean-Yves Hogrel, Ann M Reed, Lisa Christopher-Stine, Nicolino Ruperto
The adult and juvenile myositis syndromes, commonly referred to collectively as idiopathic inflammatory myopathies (IIMs), are systemic autoimmune diseases with the hallmarks of muscle weakness and inflammation. Validated, well-standardized measures to assess disease activity, known as core set measures, were developed by international networks of myositis researchers for use in clinical trials. Composite response criteria using weighted changes in the core set measures of disease activity were developed and validated for adult and juvenile patients with dermatomyositis and adult patients with polymyositis, with different thresholds for minimal, moderate and major improvement in adults and juveniles...
April 12, 2018: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/29650643/correction-mortality-in-idiopathic-inflammatory-myopathy-results-from-a-swedish-nationwide-population-based-cohort-study
#3
(no author information available yet)
No abstract text is available yet for this article.
May 2018: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29649184/immunopathological-characterization-of-muscle-biopsy-samples-from-immune-mediated-necrotizing-myopathy-patients
#4
Qiong Wang, Yue Li, Suqiong Ji, Fang Feng, Bitao Bu
BACKGROUND Immune-mediated necrotizing myopathy (IMNM) is a relatively new proposed category of idiopathic inflammatory myopathies (IIMs), characterized by the presence of abundant necrotic muscle fibers, myophagocytosis, and sparse inflammatory infiltrates. The aim of our study was to analyze the immunopathological characteristics of IMNM by detecting biopsy samples from a cohort of patients, and to delineate the pathways involved in the pathogenesis. MATERIAL AND METHODS A retrospective evaluation of muscle biopsy samples, clinical and laboratory data, and immunohistochemical analysis of macrophages MHC-I and MAC, was performed for all patients diagnosed as having IMNM but without a prior exposure to statins...
April 12, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29642946/correction-to-identification-of-multiple-cancer-associated-myositis-specific-autoantibodies-in-idiopathic-inflammatory-myopathies-a-large-longitudinal-cohort-study
#5
Hanbo Yang, Qinglin Peng, Liguo Yin, Shanshan Li, Jingli Shi, Yamei Zhang, Xin Lu, Xiaoming Shu, Sigong Zhang, Guochun Wang
After publication of the article [1], it has been brought to our attention that the labels in Fig. 2b have been switched and are as a result incorrect. The label for the red line should have the label "non-CAM" and the yellow line "CAM".
April 11, 2018: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/29623846/immune-mediated-necrotizing-myopathy-where-do-we-stand
#6
Abdel Gaffar A Mohammed, Ayanda Gcelu, Farzana Moosajee, Stella Botha, Ali Asgar Kalla
Immune-mediated necrotizing myopathies (IMNMs) are a group of acquired autoimmune muscle disorders that have been recently defined. They are characterized by proximal muscle weakness, high levels of creatinine kinase, and myopathic findings on electromyogram (EMG). Muscle biopsy in IMNM differentiates it from the other subgroups of idiopathic inflammatory myositis (IIM) by the presence of myofibre necrosis and prominent regeneration without substantial lymphocytic inflammatory infiltrates. Anti-signal recognition particle (SRP) and anti-3hydroxy-3 methylglutaryl-coenzyme A reductase (HMGCR) autoantibodies were found in two thirds of IMNM patients...
April 5, 2018: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/29623355/clinical-and-laboratory-features-of-patients-with-osteomalacia-initially-presenting-with-neurological-manifestations
#7
S W Kim, N Hong, Y Rhee, Y-C Choi, H Y Shin, S M Kim
Patients with osteomalacia often visit the neurology department with conditions mimicking other myopathies. We analyzed clinical features of osteomalacia patients who visited the neurology department. These patients frequently presented with hypocalcemia, hypovitaminosis D, and pain with less severe weakness. Osteomalacia should be considered when patients present with pain and weakness. INTRODUCTION: Osteomalacia is a disease of bone metabolism; however, some patients with osteomalacia initially visit the neurology department...
April 5, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29595280/-idiopathic-inflammatory-myopathies
#8
Jiří Vencovský
Idiopathic inflammatory myopathies form a heterogeneous group of acquired inflammatory diseases afflicting striated muscles. The disease is frequently accompanied by systemic and organ involvement. Dermatomyositis, polymyositis, cancer associated myositis, immune mediated necrotizing myopathy, myositis in overlap syndromes, juvenile myositis and inclusion body myositis are the most frequently encountered subtypes. The basic manifestation is usually painless muscle weakness brought about by inflammation and by other immune changes at the impacted muscles...
2018: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/29593343/treatment-in-myositis
#9
REVIEW
Chester V Oddis, Rohit Aggarwal
As with the treatment of many immune-mediated diseases, managing myositis encompasses diverse factors, which present a challenge to the physician caring for these patients. The idiopathic inflammatory myopathies (IIMs, also known as myositis), are fundamentally heterogeneous; many contributory immunological perturbations are involved in the pathogenesis of myositis, leading to varying clinical phenotypic presentations. Targeting any one or several of these deleterious pathways with a therapeutic agent might seem reasonable, but the desired response is not uniformly predictable...
March 29, 2018: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/29579357/venous-thromboembolic-events-in-idiopathic-inflammatory-myopathy-occurrence-and-relation-to-disease-onset
#10
Aleksandra Antovic, Antonella Notarnicola, John Svensson, Ingrid E Lundberg, Marie Holmqvist
OBJECTIVES: To assess the incidence of venous thromboembolism (VTE) in patients with idiopathic inflammatory myopathies (IIM), and compare the incidence in IIM to the incidence in the general population. To identify patient categories at high risk and investigate the development of risk in relation to IIM diagnosis. METHODS: Using nationwide registers we identified a cohort of 440 individuals with newly diagnosed IIM and 4459 individuals from the general population...
March 26, 2018: Arthritis Care & Research
https://www.readbyqxmd.com/read/29563381/diagnostic-approach-to-cardiac-involvement-in-idiopathic-inflammatory-myopathies
#11
Fei Chen, Yong Peng, Mao Chen
Cardiac involvement in idiopathic inflammatory myopathies (IIMs) attracts more attention than it ever did because of its morbidity and impact on worse prognosis, although the accurate information needs further epidemiological studies. Early identification and intervention for the diseased heart may help improve the clinical outcomes of IIMs with cardiac involvement. Cardiac troponin assays, allowing for sensitive detection of minor myocardium injury, may provide a new way for early detection for heart involvement in IIMs...
March 20, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29552370/effect-of-adalimumab-on-refractory-arthritis-in-juvenile-idiopathic-inflammatory-myopathy-with-anti-mda5-autoantibody
#12
Takako Miyamae, Takuma Hara, Aki Hanaya, Yumi Tani, Takayuki Kishi, Hisashi Yamanaka
A 10-year-old girl manifested persistent fever, skin rash, leg pain, fatigue, and joint pain. Based on muscle weakness, elevated muscle-derived enzymes, magnetic resonance imaging, and skin biopsy results, the diagnosis was juvenile idiopathic inflammatory myopathies (JIIM). Chest CT was normal; the anti-melanoma differentiation-associated protein-5 (anti-MDA5) autoantibody was positive. Initial manifestations subsided after prednisolone (PSL) and methotrexate treatment. After the PSL dosage was decreased, the patient presented with metacarpophalangeal (MCP) joint pain and swelling in both index fingers, synovial fluid, and signals on power Doppler ultrasound...
2018: Case Reports in Rheumatology
https://www.readbyqxmd.com/read/29550929/new-myositis-classification-criteria-what-we-have-learned-since-bohan-and-peter
#13
REVIEW
Valérie Leclair, Ingrid E Lundberg
PURPOSE OF REVIEW: Idiopathic inflammatory myopathy (IIM) classification criteria have been a subject of debate for many decades. Despite several limitations, the Bohan and Peter criteria are still widely used. The aim of this review is to discuss the evolution of IIM classification criteria. RECENT FINDINGS: New IIM classification criteria are periodically proposed. The discovery of myositis-specific and myositis-associated autoantibodies led to the development of clinico-serological criteria, while in-depth description of IIM morphological features improved histopathology-based criteria...
March 17, 2018: Current Rheumatology Reports
https://www.readbyqxmd.com/read/29541951/the-prevalence-and-clinical-significance-of-anti-puf60-antibodies-in-patients-with-idiopathic-inflammatory-myopathy
#14
Ya-Mei Zhang, Han-Bo Yang, Jing-Li Shi, He Chen, Xiao-Ming Shu, Xin Lu, Guo-Chun Wang, Qing-Lin Peng
Autoantibodies against poly-U-binding factor 60 kDa protein (PUF60) have been reported in Caucasian dermatomyositis (DM) patients. However, their clinical significance in idiopathic inflammatory myopathy (IIM) remains to be fully clarified. Our objective was to analyze the prevalence and clinical significance of anti-PUF60 antibodies in a large cohort of Chinese IIM patients. In our study, 388 IIM patients, 301 disease controls, and 167 healthy controls (HCs) were involved. An enzyme-linked immunosorbent assay (ELISA) was developed to detect serum anti-PUF60 levels and was validated using immunoblotting methods...
March 15, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29540998/bench-to-bedside-review-of-myositis-autoantibodies
#15
REVIEW
Boaz Palterer, Gianfranco Vitiello, Alessia Carraresi, Maria Grazia Giudizi, Daniele Cammelli, Paola Parronchi
Idiopathic inflammatory myopathies represent a heterogeneous group of autoimmune diseases with systemic involvement. Even though numerous specific autoantibodies have been recognized, they have not been included, with the only exception of anti-Jo-1, into the 2017 Classification Criteria, thus perpetuating a clinical-serologic gap. The lack of homogeneous grouping based on the antibody profile deeply impacts the diagnostic approach, therapeutic choices and prognostic stratification of these patients. This review is intended to highlight the comprehensive scenario regarding myositis-related autoantibodies, from the molecular characterization and biological significance to target antigens, from the detection tools, with a special focus on immunofluorescence patterns on HEp-2 cells, to their relative prevalence and ethnic diversity, from the clinical presentation to prognosis...
2018: Clinical and Molecular Allergy: CMA
https://www.readbyqxmd.com/read/29538753/using-serum-troponins-to-screen-for-cardiac-involvement-and-assess-disease-activity-in-the-idiopathic-inflammatory-myopathies
#16
James B Lilleker, Axel C P Diederichsen, Søren Jacobsen, Mark Guy, Mark E Roberts, Jamie C Sergeant, Robert G Cooper, Louise P Diederichsen, Hector Chinoy
Objectives: Limitations in the methods available for identifying cardiac involvement and accurately quantifying disease activity in the idiopathic inflammatory myopathies (IIMs) may contribute to poor outcomes. We investigated the utility of different serum muscle damage markers [total creatine kinase (CK), cardiac troponin T (cTnT) and cardiac troponin I (cTnI)] to address these issues. Methods: We assessed disease activity and cardiac involvement using the International Myositis Assessment and Clinical Studies Group core set measures in 123 participants with confirmed adult-onset IIM from the UK and Denmark...
March 12, 2018: Rheumatology
https://www.readbyqxmd.com/read/29534337/differential-clinical-associations-of-anti-nuclear-matrix-protein-2-autoantibodies-in-patients-with-idiopathic-inflammatory-myopathies
#17
Hanbo Yang, Xin Lu, Qinglin Peng, Wei Jiang, Jingli Shi, Yamei Zhang, He Chen, Guochun Wang
OBJECTIVE: To investigate the associations between anti-NXP-2 autoantibody levels and disease activity as well as calcinosis severity. METHODS: The serum levels of anti-NXP-2 autoantibodies were determined in 709 idiopathic inflammatory myopathies (IIMs) and also serially measured by an in-house enzyme-linked immunosorbent assay using recombinant MORC3. Patients with anti-NXP-2 autoantibodies were divided into two subgroups: with or without calcinosis. The associations of anti-NXP-2 autoantibody levels with organ-specific disease activity, serum creatine kinase (CK) levels, and calcinosis severity were investigated in cross-sectional and longitudinal analyses...
March 13, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29532710/myositis-specific-autoantibodies-in-japanese-patients-with-juvenile-idiopathic-inflammatory-myopathies
#18
Masahiro Ueki, Ichiro Kobayashi, Shunichiro Takezaki, Yusuke Tozawa, Yuka Okura, Masafumi Yamada, Masataka Kuwana, Tadashi Ariga
OBJECTIVES: The aim of our study is to clarify the association of myositis-specific autoantibodies (MSAs) with clinical and laboratory features in Japanese patients with juvenile idiopathic inflammatory myopathies (JIIMs). METHODS: We retrospectively analyzed the frequency of MSAs and their association with clinical or laboratory findings in 25 Japanese patients with JIIMs in Hokkaido district. RESULTS: Eighteen of 25 patients (72%) were positive for MSAs; seven with anti-melanoma differentiation associated gene (MDA) 5 (28%), 5 with anti-transcriptional intermediary factor (TIF)-1γ (20%), 4 with anti-MJ/nuclear matrix protein (NXP)-2 (16%), 2 with anti-Jo-1 (8%), 1 with anti- HMG-CoA reductase, 1 with anti-signal recognition peptide (SRP) antibodies (4% each), including co-existence and transition of MSAs in one patient each...
March 13, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/29526638/skeletal-muscle-cells-actively-shape-auto-immune-responses
#19
REVIEW
Ali Maisam Afzali, Thomas Müntefering, Heinz Wiendl, Sven G Meuth, Tobias Ruck
Histopathological analyses of muscle specimens from myositis patients indicate that skeletal muscle cells play an active role in the interaction with immune cells. Research over the last few decades has shown that skeletal muscle cells exhibit immunobiological properties that perfectly define them as non-professional antigen presenting cells. They are able to present antigens via major histocompatibility complex molecules, exhibit costimulatory molecules and secrete soluble molecules that actively shape the immune response in an either pro- or anti-inflammatory manner...
March 8, 2018: Autoimmunity Reviews
https://www.readbyqxmd.com/read/29522204/revisiting-pathological-classification-criteria-for-adult-idiopathic-inflammatory-myopathies-in-depth-analysis-of-muscle-biopsies-and-correlation-between-pathological-diagnosis-and-clinical-manifestations
#20
Ying Hou, Yue-Bei Luo, Tingjun Dai, Kai Shao, Wei Li, Yuying Zhao, Jian-Qiang Lu, Chuanzhu Yan
The European Neuromuscular Centre (ENMC) pathological classification criteria of idiopathic inflammatory myopathies (IIMs) are debatable. The aim of this study was to explore their practicability and reproducibility. We conducted a retrospective analysis of 57 cases of IIMs excluding dermatomyositis (DM) and sporadic inclusion body myositis (sIBM) by in-depth analysis of muscle biopsies and comparisons of the clinical characteristics among polymyositis (PM), non-specific myositis (NSM) and necrotizing autoimmune myopathy (NAM)...
March 7, 2018: Journal of Neuropathology and Experimental Neurology
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