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Inflammatory Myopathies

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https://www.readbyqxmd.com/read/28524083/idiopathic-inflammatory-myopathies-a-review-of-the-classification-and-impact-of-pathogenesis
#1
REVIEW
Dana E Mandel, Charles J Malemud, Ali D Askari
Idiopathic inflammatory myopathies (IIMs) are a group of autoimmune muscle diseases with significant morbidity and mortality. This review details and updates the pathogenesis and emerging importance of myositis-specific antibodies in the development of IIMs. An increase in the understanding of how these myositis-specific antibodies play a role in IIMs has led to the further categorization of IIMs from the traditional polymyositis versus dermatomyositis, to additional subcategories of IIMs such as necrotizing autoimmune myositis (NAM)...
May 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28523201/sarcoidosis-is-it-a-possible-trigger-of-inclusion-body-myositis
#2
Ali Zakaria, Issam Turk, Kenneth Leung, Ana Capatina-Rata, Waseem Farra
Sarcoidosis is a multisystem disorder of unknown etiology, characterized pathologically by the presence of nonnecrotizing granulomatous inflammation in affected organs. Although skeletal muscle is involved in 50-80 percent of individuals with sarcoidosis, symptomatic myopathy has been shown to be a rare manifestation of the disease. Inclusion body myositis (IBM) is a rare acquired idiopathic inflammatory myopathy with the insidious onset of asymmetric and distal muscle weakness that characteristically involves the quadriceps, tibialis anterior, and forearm flexors...
2017: Case Reports in Rheumatology
https://www.readbyqxmd.com/read/28512504/a-case-report-of-drug-induced-myopathy-involving-extraocular-muscles-after-combination-therapy-with-tremelimumab-and-durvalumab-for-non-small-cell-lung-cancer
#3
William Carrera, Brandon J Baartman, Gregory Kosmorsky
Recently developed anti-tumour therapies targeting immune checkpoints include tremelimumab and durvalumab. These agents have incompletely characterised side effect profiles. The authors report a 68-year-old man treated for non-small cell lung cancer (NSCLC) with a combination of tremelimumab and durvalumab. After treatment he developed diplopia, ptosis, fatigue, weakness, and an inflammatory myopathy affecting the extraocular muscles requiring hospitalisation. Electromyography (EMG) testing and muscle biopsy suggested inflammatory myopathy without sign of myasthenia...
June 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28498142/inflammatory-myopathy-and-axonal-neuropathy-in-a-patient-with-melanoma-following-pembrolizumab-treatment
#4
Panagiotis T Diamantopoulos, Katerina Tsatsou, Olga Benopoulou, Amalia Anastasopoulou, Helen Gogas
Immune-mediated adverse effects of immune checkpoint inhibitors are rather common, but neuromyopathic immune-related adverse events are very rare. In this report, we present a unique case of a patient with a complex neuromyopathic syndrome with axonal neuropathy and inflammatory myopathy after a single dose of pembrolizumab. An 82-year-old patient with a previously untreated stage IIIc melanoma developed ptosis in the left eye, generalized weakness, and neck and shoulder pain 15 days after pembrolizumab administration...
May 11, 2017: Journal of Immunotherapy
https://www.readbyqxmd.com/read/28493173/idiopathic-inflammatory-myopathy-and-the-risk-of-venous-thromboembolism-a-meta-analysis
#5
Young Ho Lee, Gwan Gyu Song
This study aimed at analyzing published data on the association between idiopathic inflammatory myopathy and venous thromboembolism (VTE). We examined studies on VTE risk in patients with polymyositis (PM) and/or dermatomyositis (DM), in the MEDLINE, EMBASE, and Cochrane databases and via manual searches. We performed a meta-analysis on the relative risks (RRs) of VTE, pulmonary embolism (PE), and deep vein thrombosis (DVT) in these patients. Five studies, including 8858 patients with PM/DM met the inclusion criteria...
May 10, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28488045/-musculoskeletal-manifestations-of-sarcoidosis
#6
REVIEW
P Korsten, G Chehab
Musculoskeletal manifestations in the context of sarcoidosis are frequently observed. The rheumatologist regularly encounters this disease in clinical practice. In the present review, we aim to give a current overview of the manifestations and treatments relevant to the practicing rheumatologist. The most frequently encountered manifestation is Lofgren's syndrome, which is characterized by bilateral ankle periarthritis, bilateral hilar lymphadenopathy, and erythema nodosum and has an excellent prognosis. Chronic arthropathy most commonly manifests as oligoarthritis, which sometimes hampers its differentiation from spondylarthropathies, especially when sacroiliitis, enthesitis or dactylitis are simultaneously present...
May 9, 2017: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/28479486/integrated-diagnosis-project-for-inflammatory-myopathies-an-association-between-autoantibodies-and-muscle-pathology
#7
REVIEW
Shigeaki Suzuki, Akinori Uruha, Norihiro Suzuki, Ichizo Nishino
Inflammatory myopathies are a heterogeneous group of immune-mediated diseases that involve skeletal muscle as well as many other organs. The classification of inflammatory myopathies has been based on clinical diagnoses, pathological diagnoses, and autoantibodies, independently. The clinical phenotypes of inflammatory myopathies are characterized by various autoantibodies that are originally detected by RNA or protein immunoprecipitation. However, since the correlation between histological features and autoantibodies had not been fully elucidated, we created the "Integrated Diagnosis Project for Inflammatory Myopathies" in October 2010...
May 4, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28473041/diagnosis-and-management-of-immune-mediated-myopathies
#8
REVIEW
Margherita Milone
Immune-mediated myopathies (IMMs) are a heterogeneous group of acquired muscle disorders characterized by muscle weakness, elevated creatine kinase levels, and myopathic electromyographic findings. Most IMMs feature the presence of inflammatory infiltrates in muscle. However, the inflammatory exudate may be absent. Indeed, necrotizing autoimmune myopathy (NAM), also called immune-mediated necrotizing myopathy, is characterized by a necrotizing pathologic process with no or minimal inflammation in muscle. The recent discovery of antibodies associated with specific subtypes of autoimmune myopathies has played a major role in characterizing these diseases...
May 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28469265/inflammatory-myopathies-adult-and-paediatric-experts-unite-for-new-response-criteria
#9
Joanna Collison
No abstract text is available yet for this article.
May 4, 2017: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/28460448/anti-mda5-antibody-as-a-potential-diagnostic-and-prognostic-biomarker-in-patients-with-dermatomyositis
#10
Liubing Li, Qian Wang, Funing Yang, Chanyuan Wu, Si Chen, Xiaoting Wen, Chenxi Liu, Yongzhe Li
The presence of anti-MDA5 antibodies in serum represents an important biomarker in the diagnosis and prediction of prognosis for patients with idiopathic inflammatory myopathies (IIMs). Due to conflicting results that have been reported regarding the detection of anti-MDA5 antibodies, the goal of this study was to assess a potential association between the presence of anti-MDA5 antibodies and dermatomyositis/polymyositis (DM/PM), as well as the diagnostic and prognostic values of anti-MDA5 antibodies for DM/PM...
April 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28456937/muscle-microdialysis-to-investigate-inflammatory-biomarkers-in-facioscapulohumeral-muscular-dystrophy
#11
Giorgio Tasca, Mauro Monforte, Maddalena Corbi, Giuseppe Granata, Donatella Lucchetti, Alessandro Sgambato, Enzo Ricci
Recent progresses in the understanding of facioscapulohumeral muscular dystrophy (FSHD) genetics opened the way to the development of targeted therapies. However, knowledge about pathophysiology of muscle damage is still limited and there is increasing need to identify biomarkers of disease activity in the perspective of clinical trial readiness.We analyzed inflammatory mediators in the interstitial fluid of muscles with different MRI signal in FSHD patients, comparing muscles displaying early lesions on short-tau inversion recovery (STIR) sequences with normal ones...
April 29, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28456665/a-novel-paradigm-links-mitochondrial-dysfunction-with-muscle-stem-cell-impairment-in-sepsis
#12
REVIEW
Laurent Chatre, Franck Verdonk, Pierre Rocheteau, Clément Crochemore, Fabrice Chrétien, Miria Ricchetti
Sepsis is an acute systemic inflammatory response of the body to microbial infection and a life threatening condition associated with multiple organ failure. Survivors may display long-term disability with muscle weakness that remains poorly understood. Recent data suggest that long-term myopathy in sepsis survivors is due to failure of skeletal muscle stem cells (satellite cells) to regenerate the muscle. Satellite cells impairment in the acute phase of sepsis is linked to unusual mitochondrial dysfunctions, characterized by a dramatic reduction of the mitochondrial mass and hyperactivity of residual organelles...
April 26, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28447208/squamous-cell-carcinoma-of-the-lung-associated-with-anti-jo1-antisynthetase-syndrome-a-case-report-and-review-of-the-literature
#13
REVIEW
G Boleto, J-M Perotin, J-P Eschard, J-H Salmon
Antisynthetase syndrome is a heterogeneous idiopathic inflammatory myopathy. Anti-Jo1 is the most common antibody found in this condition. Dermatomyositis is known to be associated with malignancy, but the association between antisynthetase syndrome and malignancy is not clearly established. We report a case of an association of squamous cell carcinoma of the lung and anti-Jo1 antisynthetase syndrome. A 67-year-old man presented with polyarthritis, muscle weakness of the pelvic girdle, "mechanic's hands," and weight loss...
April 26, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28446710/linear-ubiquitin-chains-enzymes-mechanisms-and-biology
#14
REVIEW
Katrin Rittinger, Fumiyo Ikeda
Ubiquitination is a versatile post-translational modification that regulates a multitude of cellular processes. Its versatility is based on the ability of ubiquitin to form multiple types of polyubiquitin chains, which are recognized by specific ubiquitin receptors to induce the required cellular response. Linear ubiquitin chains are linked through Met 1 and have been established as important players of inflammatory signalling and apoptotic cell death. These chains are generated by a ubiquitin E3 ligase complex called the linear ubiquitin chain assembly complex (LUBAC) that is thus far the only E3 ligase capable of forming linear ubiquitin chains...
April 2017: Open Biology
https://www.readbyqxmd.com/read/28441765/distinct-fiber-type-signature-in-mouse-muscles-expressing-a-mutant-lamin-a-responsible-for-congenital-muscular-dystrophy-in-a-patient
#15
Alice Barateau, Nathalie Vadrot, Onnik Agbulut, Patrick Vicart, Sabrina Batonnet-Pichon, Brigitte Buendia
Specific mutations in LMNA, which encodes nuclear intermediate filament proteins lamins A/C, affect skeletal muscle tissues. Early-onset LMNA myopathies reveal different alterations of muscle fibers, including fiber type disproportion or prominent dystrophic and/or inflammatory changes. Recently, we identified the p.R388P LMNA mutation as responsible for congenital muscular dystrophy (L-CMD) and lipodystrophy. Here, we asked whether viral-mediated expression of mutant lamin A in murine skeletal muscles would be a pertinent model to reveal specific muscle alterations...
April 24, 2017: Cells
https://www.readbyqxmd.com/read/28439062/a-rare-case-of-necrotizing-myopathy-and-fibrinous-and-organizing-pneumonia-with-anti-ej-antisynthetase-syndrome-and-ssa-antibodies
#16
Muhammad Kashif, Divya Arya, Masooma Niazi, Misbahuddin Khaja
BACKGROUND Idiopathic inflammatory myopathies are autoimmune disorders that can involve the skin, joints, muscles, and lungs. The most common of these disorders are dermatomyositis, polymyositis, overlap syndrome, and inclusion body myositis. Necrotizing autoimmune myopathy is an idiopathic inflammatory myopathy that is rarely associated with Sjögren's syndrome. The most common lung findings associated with anti-EJ antisynthetase syndrome are nonspecific interstitial pneumonia and usual interstitial pneumonia; this condition is rarely associated with fibrinous and organizing pneumonia...
April 25, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28424681/the-spontaneous-autoimmune-neuromyopathy-in-icosl-nod-mice-is-cd4-t-cell-and-interferon-%C3%AE-dependent
#17
Claire Briet, Gwladys Bourdenet, Ute C Rogner, Chantal Becourt, Isabelle Tardivel, Laurent Drouot, Christophe Arnoult, Jean-Claude do Rego, Nicolas Prevot, Charbel Massaad, Olivier Boyer, Christian Boitard
Abrogation of ICOS/ICOS ligand (ICOSL) costimulation prevents the onset of diabetes in the non-obese diabetic (NOD) mouse but, remarkably, yields to the development of a spontaneous autoimmune neuromyopathy. At the pathological level, ICOSL(-/-) NOD mice show stronger protection from insulitis than their ICOS(-/-) counterparts. Also, the ICOSL(-/-) NOD model carries a limited C57BL/6 region containing the Icosl nul mutation, but, in contrast to ICOS(-/-) NOD mice, no gene variant previously reported as associated to NOD diabetes...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28422672/aiimds-an-integrated-framework-of-automatic-idiopathic-inflammatory-myopathy-diagnosis-for-muscle
#18
Manish Sapkota, Fujun Liu, Yuanpu Xie, Hai Su, Fuyong Xing, Lin Yang
Idiopathic Inflammatory Myopathy (IIM) is a common skeletal muscle disease that relates to weakness and inflammation of muscle. Early diagnosis and prognosis of different types of IIMs will guide the effective treatment. Interpretation of digitized images of the cross section muscle biopsy, which is currently done manually, provides the most reliable diagnostic information. With the increasing volume of images, the management and manual interpretation of the digitized muscle images suffer from low efficiency and high interobserver variabilities...
April 13, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28414153/inflammatory-myopathy-associated-with-myasthenia-gravis-with-and-without-thymic-pathology-report-of-four-cases-and-literature-review
#19
REVIEW
Ernestina Santos, Ester Coutinho, Ana Martins da Silva, António Marinho, Carlos Vasconcelos, Ricardo Taipa, Manuel Melo Pires, Guilherme Gonçalves, Carlos Lopes, Maria Isabel Leite
INTRODUCTION: The association of myasthenia gravis (MG) and inflammatory myopathy is rare and often only one of the diseases is diagnosed. Thymus pathology may be in the origin of such disease association. METHODS: We described four patients with both MG and inflammatory myopathy. RESULTS: These cases correspond to 2.3% of our MG cohort. Case 1: MG, polymyositis and thymolipoma; case 2: MG and necrotizing myopathy without thymic pathology on a background of scleroderma, Raynaud's phenomenon, esophageal dysmotility, sclerodactyly, telangiectasia (CREST); case 3: MG and dermatomyositis without thymic pathology; case 4: MG and dermatomyositis with type C thymoma...
April 13, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28405484/thyroid-associated-ophthalmopathy
#20
REVIEW
Esra Şahlı, Kaan Gündüz
Thyroid-associated ophthalmopathy is the most frequent extrathyroidal involvement of Graves' disease but it sometimes occurs in euthyroid or hypothyroid patients. Thyroid-associated ophthalmopathy is an autoimmune disorder, but its pathogenesis is not completely understood. Autoimmunity against putative antigens shared by the thyroid and the orbit plays a role in the pathogenesis of disease. There is an increased volume of extraocular muscles, orbital connective and adipose tissues. Clinical findings of thyroid-associated ophthalmopathy are soft tissue involvement, eyelid retraction, proptosis, compressive optic neuropathy, and restrictive myopathy...
April 2017: Turkish Journal of Ophthalmology
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