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Inflammatory myositis

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https://www.readbyqxmd.com/read/28333717/effect-of-resistance-exercise-on-muscle-metabolism-and-autophagy-in-sibm
#1
Jae-Hoon Jeong, Dae-Seung Yang, Dong-Ju Hwang, Joon-Yong Cho, Eun-Bum Kang
PURPOSE: Sporadic inclusion body myositis (sIBM), a muscular degenerative disease in the elderly, is an inflammatory myopathy characterized by muscle weakness in the wrist flexor, quadriceps, and tibialis anterior muscles. We aimed to identify the therapeutic effect of resistance exercise (RE) in improving sIBM symptoms in an sIBM animal model. METHODS: Six-week-old male Wistar rats were divided into a sham group (sham, n = 12), chloroquine-control group (CQ-con, n = 12), and chloroquine-RE group (CQ-RE, n = 12)...
March 23, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28293456/acute-digital-ischemia-a-rare-presentation-of-antisynthetase-syndrome
#2
Jin Ei Chan, Sandeep Palakodeti, Matthew J Koster
Antisynthetase syndrome (ASS) is recognized as a subgroup of idiopathic inflammatory myopathies (IIMs). It is associated with autoantibodies directed against aminoacyl-transfer ribonucleic acid (tRNA) synthetase enzymes. We report the first case of anti-PL-7/anti-SSA 52kD ASS presenting as acute digital ischemia, an association not described previously. Occlusive vasculopathy is a rare but serious manifestation that can be seen at presentation in patients with ASS and may herald the onset of severe interstitial lung disease (ILD)...
March 2017: European Journal of Rheumatology
https://www.readbyqxmd.com/read/28292255/subcutaneous-igg-in-the-myositis-spectrum-disorders
#3
Maria Giovanna Danieli, Chiara Gelardi, Veronica Pedini, Francesco Logullo, Armando Gabrielli
The efficacy of subcutaneous immunoglobulin is reported in several neurological disorders and, more recently, its use has been extended to other inflammatory diseases, such as the idiopathic inflammatory myopathies, including polymyositis and dermatomyositis. Due to the rarity of these disorders, the role of immunoglobulin, administered intravenously or subcutaneously, remains unclear and poorly investigated. We report our experience about the use of subcutaneous immunoglobulin in myositis spectrum disorders, from idiopathic inflammatory myopathies to more complex conditions, such as overlap and cancer-associated myositis or pregnancy...
March 14, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28285286/necrotizing-polyarteritis-nodosa-like-vasculitis-in-a-child-with-systemic-lupus-erythematosus
#4
Ritambhra Nada, Joseph L Matthews, Sagar Bhattad, Anju Gupta, Surjit Singh
A 10-year-old child presented with prolonged fever, lymphadenopathy, weight loss, oral ulcers, alopecia and parotitis. She later developed arterial thrombosis, poly-serositis, nephritis, myocarditis, sacro-ilitis, autoimmune hemolytic anemia and refractory thrombocytopenia. Though anti-dsDNA was negative, she was diagnosed to have systemic lupus erythematosus (SLE). Terminally, she had pulmonary symptoms and succumbed to her illness. The autopsy showed lupus nephritis-Class II, polyserositis, myocarditis, inflammatory myositis, immune mediated vasculitis involving renal, coronary, pancreatic, adrenal, dermal and intramuscular arteries, and pulmonary hemorrhages and edema...
February 15, 2017: Indian Pediatrics
https://www.readbyqxmd.com/read/28279643/follistatin-gene-therapy-for-sporadic-inclusion-body-myositis-improves-functional-outcomes
#5
Jerry R Mendell, Zarife Sahenk, Samiah Al-Zaidy, Louise R Rodino-Klapac, Linda P Lowes, Lindsay N Alfano, Katherine Berry, Natalie Miller, Mehmet Yalvac, Igor Dvorchik, Melissa Moore-Clingenpeel, Kevin M Flanigan, Kathleen Church, Kim Shontz, Choumpree Curry, Sarah Lewis, Markus McColly, Mark J Hogan, Brian K Kaspar
Sporadic inclusion body myositis, a variant of inflammatory myopathy, has features distinct from polymyositis/dermatomyositis. The disease affects men more than women, most commonly after age 50. Clinical features include weakness of the quadriceps, finger flexors, ankle dorsiflexors, and dysphagia. The distribution of weakness is similar to Becker muscular dystrophy, where we previously reported improvement following intramuscular injection of an isoform of follistatin (FS344) by AAV1. For this clinical trial, rAAV1...
March 6, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28275598/bilateral-ocular-myositis-associated-with-whipple-s-disease
#6
Vivak Parkash, Hardeep Singh Mudhar, Bart E Wagner, Didier Raoult, Ruth Batty, Hubert Lepidi, John Burke, Paul Collini, Thushan de Silva
PURPOSE: To describe the clinical features of a Caucasian female patient with a history of treated gastrointestinal Whipple's disease (WD) who developed new-onset diplopia, with a description of the histopathological features of the extraocular muscle biopsies. METHODS: A previously fit 38-year-old Caucasian female presented with acute-onset diplopia after being on a sustained medication regime for biopsy-proven gastrointestinal WD. A magnetic resonance imaging scan of her orbits with gadolinium revealed diffuse enhancement of the bellies of the extraocular muscles bilaterally, particularly the medial rectus, superior rectus, and superior oblique muscles, consistent with an infiltrative myositis...
January 2017: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/28251541/profile-of-pediatric-idiopathic-inflammatory-myopathies-from-a-tertiary-care-center-of-eastern-india
#7
Sumantra Sarkar, Tanushree Mondal, Arpan Saha, Rakesh Mondal, Supratim Datta
OBJECTIVES: To report data on Idiopathic inflammatory myopathies (IIM) from eastern India. METHODS: All IIM patients diagnosed over the last 5 y (2011-2016) were included through a retrospective review of records from the hospital and specialty clinic at Institute of Postgraduate Medical Education & Research (I.P.G.M.E.&R.), Kolkata. RESULTS: Out of the 11 IIM patients, 9 had Juvenile dermatomyositis (JDM) and 2 had overlap myositis (OM) [with systemic lupus erythematosus (SLE) and scleroderma]...
March 2, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28224635/infections-and-vaccinations-as-possible-triggers-of-inflammatory-myopathies
#8
Vidya Limaye, Caroline Smith, Barbara Koszyca, Peter Blumbergs, Sophia Otto
INTRODUCTION: The role of vaccinations and infections in triggering idiopathic inflammatory myopathies (IIM) has not been confirmed. METHODS: Among patients with histologically-confirmed myositis, infections or vaccinations administered prior to myositis onset were determined. The characteristics of this group were compared with controls (myositis patients without prior infection or vaccination). RESULTS: The frequency of IIM with a prior vaccination was 20 of 206, (9...
February 22, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28209124/rna-seq-and-metabolomic-analyses-of-akt1-mediated-muscle-growth-reveals-regulation-of-regenerative-pathways-and-changes-in-the-muscle-secretome
#9
Chia-Ling Wu, Yoshinori Satomi, Kenneth Walsh
BACKGROUND: Skeletal muscle is a major regulator of systemic metabolism as it serves as the major site for glucose disposal and the main reservoir for amino acids. With aging, cachexia, starvation, and myositis, there is a preferential loss of fast glycolytic muscle fibers. We previously reported a mouse model in which a constitutively-active Akt transgene is induced to express in a subset of muscle groups leading to the hypertrophy of type IIb myofibers with an accompanying increase in strength...
February 16, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28202739/anti-hmgcr-autoantibodies-in-juvenile-idiopathic-inflammatory-myopathies-identify-a-rare-but-clinically-important-subset-of-patients
#10
Sarah L Tansley, Zoe E Betteridge, Stefania Simou, Thomas S Jacques, Clarissa Pilkington, Mark Wood, Kishore Warrier, Lucy R Wedderburn, Neil J McHugh
OBJECTIVE: We aimed to establish the prevalence and clinical associations of anti-HMG-CoA-reductase (anti-HMGCR) in a large UK cohort with juvenile myositis. METHODS: There were 381 patients investigated for anti-HMGCR using ELISA. RESULTS: Anti-HMGCR autoantibodies were detected in 4 patients (1%). These children had no or minimal rash and significant muscle disease. Muscle biopsies were considered distinctive, with widespread variation in fiber size, necrotic fibers, and chronic inflammatory cell infiltrates; all had prolonged elevation of creatine kinase and all ultimately received biologic therapies...
February 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28183315/pyruvate-kinase-m2-and-the-mitochondrial-atpase-inhibitory-factor-1-provide-novel-biomarkers-of-dermatomyositis-a-metabolic-link-to-oncogenesis
#11
Fulvio Santacatterina, María Sánchez-Aragó, Marc Catalán-García, Glòria Garrabou, Cristina Nuñez de Arenas, Josep M Grau, Francesc Cardellach, José M Cuezva
BACKGROUND: Metabolic alterations play a role in the development of inflammatory myopathies (IMs). Herein, we have investigated through a multiplex assay whether proteins of energy metabolism could provide biomarkers of IMs. METHODS: A cohort of thirty-two muscle biopsies and forty plasma samples comprising polymyositis (PM), dermatomyositis (DM) and sporadic inclusion body myositis (sIBM) and control donors was interrogated with monoclonal antibodies against proteins of energy metabolism using reverse phase protein microarrays (RPPA)...
February 10, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28167851/il-1%C3%AE-induced-accumulation-of-amyloid-macroautophagy-in-skeletal-muscle-depends-on-erk
#12
Karsten Schmidt, Magdalena Wienken, Christian W Keller, Peter Balcarek, Christian Münz, Jens Schmidt
The pathology of inclusion body myositis (IBM) involves an inflammatory response and β-amyloid deposits in muscle fibres. It is believed that MAP kinases such as the ERK signalling pathway mediate the inflammatory signalling in cells. Further, there is evidence that autophagic activity plays a crucial role in the pathogenesis of IBM. Using a well established in vitro model of IBM, the autophagic pathway, MAP kinases, and accumulation of β-amyloid were examined. We demonstrate that stimulation of muscle cells with IL-1β and IFN-γ led to an increased phosphorylation of ERK...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28137500/interstitial-lung-disease-and-myositis-specific-and-associated-autoantibodies-clinical-manifestations-survival-and-the-performance-of-the-new-ats-ers-criteria-for-interstitial-pneumonia-with-autoimmune-features-ipaf
#13
Mayra Mejía, Denisse Herrera-Bringas, Diana I Pérez-Román, Hermes Rivero, Heidegger Mateos-Toledo, Pedro Castorena-García, José E Figueroa, Jorge Rojas-Serrano
OBJECTIVE: to describe the clinical manifestations and survival of patients with ILD and myositis-specific and associated autoantibodies, and to evaluate the performance of the new ATS/ERS classification criteria for IPAF. PATIENTS AND METHODS: Patients with ILD and positive in at least one of the following autoantibodies: anti-Jo-1, anti-Ej, anti-PL7, anti-PL 12, anti-PM/SCL 75 and anti-PM/SCL100 were included. Patients were separated into three groups according to their autoantibody profile: 1...
February 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28132973/non-granulomatous-myositis-in-a-patient-with-ulcerative-colitis-who-showed-symptoms-resembling-gastrocnemius-myalgia-syndrome
#14
Masayoshi Yamamoto, Manabu Inoue, Naoko Tachibana, Koji Tsuzaki, Yoko Shibata, Toshiaki Hamano
The patient was a 36-year-old man. His initial symptom was bilateral thigh and calf pain. When he developed ulcerative colitis in the following year, he also noticed wasting of the calf muscles. The clinical feature is similar to gastrocnemius myalgia syndrome, although the left upper limb was also involved. A high-intensity lesion in the left calf and soleus muscles was observed on MRI, which was lead to the diagnosis of non-granulomatous myositis with infiltration of CD68-positive cells based on muscle biopsy...
February 25, 2017: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/28129093/immune-mediated-muscle-diseases-of-the-horse
#15
S A Durward-Akhurst, S J Valberg
In horses, immune-mediated muscle disorders can arise from an overzealous immune response to concurrent infections or potentially from an inherent immune response to host muscle antigens. Streptococcus equi ss. equi infection or vaccination can result in infarctive purpura hemorrhagica (IPH) in which vascular deposition of IgA-streptococcal M protein complexes produces ischemia and complete focal infarction of skeletal muscle and internal organs. In Quarter Horse-related breeds with immune-mediated myositis, an apparent abnormal immune response to muscle antigens results in upregulation of major histocompatibility complex class (MHC) I and II on muscle cell membranes, lymphocytic infiltration of lumbar and gluteal myofibers, and subsequent gross muscle atrophy...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28127151/electromyogram-evoked-focal-myositis
#16
Avery Smith, George Snipes, Carolyn Quan
Focal myositis is a rarely reported inflammatory disease of skeletal muscle, particularly of an extremity. It is often misinterpreted as an infectious syndrome, leading to prolonged antibiotic use and a delay in immunosuppressive therapy. Without a confirmed etiology to date, we present a case of recurrent focal myositis following an electromyogram.
January 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28121924/autoimmune-diseases-and-hiv-infection-a-cross-sectional-study
#17
Emilie Virot, Antoine Duclos, Leopold Adelaide, Patrick Miailhes, Arnaud Hot, Tristan Ferry, Pascal Seve
To describe the clinical manifestations, treatments, prognosis, and prevalence of autoimmune diseases (ADs) in human immunodeficiency virus (HIV)-infected patients.All HIV-infected patients managed in the Infectious Diseases Department of the Lyon University Hospitals, France, between January 2003 and December 2013 and presenting an AD were retrospectively included.Thirty-six ADs were found among 5186 HIV-infected patients which represents a prevalence of 0.69% including immune thrombocytopenic purpura (n = 15), inflammatory myositis (IM) (n = 4), sarcoidosis (n = 4), Guillain-Barré syndrome (GBS) (n = 4), myasthenia gravis (n = 2), Graves' disease (n = 2), and 1 case of each following conditions: systemic lupus erythematosus, rheumatoid arthritis, autoimmune hepatitis, Hashimoto thyroiditis and autoimmune hemolytic anemia...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28118525/predictors-of-reduced-health-related-quality-of-life-in-adult-patients-with-idiopathic-inflammatory-myopathies
#18
Michal Feldon, Payam Noroozi Farhadi, Hermine I Brunner, Lukasz Itert, Bob Goldberg, Abdullah Faiq, Jesse Wilkerson, Kathryn M Rose, Lisa G Rider, Frederick W Miller, Edward H Giannini
OBJECTIVE: Extensive studies on health-related quality of life (HRQOL) in idiopathic inflammatory myopathies (IIM) are lacking. Our objective was to document HRQOL and to identify factors associated with a reduced HRQOL in IIM patients. METHODS: A total of 1,715 patients (median age 49.9, 70% female, 87% Caucasian) who met probable or definite Bohan and Peter or Griggs criteria for myositis were included from the MYOVISION registry. HRQOL was ascertained via the SF-12v2® Health Survey questionnaire...
January 24, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28111778/sporadic-inclusion-body-myositis-a-myodegenerative-disease-or-an-inflammatory-myopathy
#19
REVIEW
C C Weihl, A L Mammen
Sporadic inclusion body myositis (sIBM) is an insidious late-onset progressive myopathy that typically affects patients over the age of 50. Clinically, patients develop a characteristic pattern of weakness that affects the forearm flexors and knee extensors. Muscle biopsy, often utilized in the diagnosis, demonstrates a chronic myopathy with mixed pathologies harbouring intramyofiber protein inclusions and endomysial inflammation. The co-existence of these pathologic features (that is, inflammation and protein aggregation) has divided the field of sIBM research into two opposing (albeit slowly unifying) camps regarding disease pathogenesis...
February 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/28076913/use-of-intravenous-immunoglobulin-therapy-for-myositis-an-audit-in-south-australian-patients
#20
Caroline Foreman, Paul Russo, Noelene Davies, Pravin Hissaria, Susanna Proudman, Tiffany Hughes, Vidya Limaye
In South Australia, between 2000 and 2014, 57 patients with idiopathic inflammatory myositis (IIM) were treated with intravenous immunoglobulin (IVIg). We reviewed disease characteristics to determine predictors of response to therapy and IVIg dosing and duration to identify opportunities to rationalise IVIg use. Patients with dermatomyositis/polymyositis had a response rate of 77% and were more likely than inclusion body myositis to respond to therapy. Consideration should be given to the use of the lowest possible dose of IVIg and to the undertaking of trials of cessation of IVIg in patients with stable IIM...
January 2017: Internal Medicine Journal
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