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https://www.readbyqxmd.com/read/28523201/sarcoidosis-is-it-a-possible-trigger-of-inclusion-body-myositis
#1
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/28505979/a-systematic-review-and-meta-analysis-of%C3%A2-prevalence-studies-of-sporadic-inclusion-body-myositis
#2
Aoife Callan, Gorana Capkun, Vijayalakshmi Vasanthaprasad, Rita Freitas, Merrilee Needham
BACKGROUND: Sporadic Inclusion Body Myositis (sIBM) is a rare and slowly progressive debilitating muscle disease with symptoms generally developing≥50 years of age. OBJECTIVE: To conduct a systematic review and meta-analysis of the prevalence of sIBM literature, including a methodological quality assessment of the selected papers. METHODS: A systematic search of Medline, Embase, Cochrane Database of Systematic Reviews and major Myositis and Neurological conferences was conducted...
May 6, 2017: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/28493327/burden-of-illness-and-healthcare-resource-use-in-us-patients-with-sporadic-inclusion-body-myositis
#3
Gorana Capkun, Aoife Callan, Haijun Tian, Zhongyuan Wei, Changgeng Zhao, Neetu Agashivala, Victoria Barghout
INTRODUCTION: We analyzed the burden of illness of sporadic Inclusion Body Myositis (sIBM) patients and the costs to the healthcare system. METHODS: A retrospective cohort analysis of 333 sIBM patients aged ≥50 years was performed using United States claims data. sIBM patients were matched in a 1:5 ratio to randomly selected individuals with ≥1 healthcare encounter within the year of index date. RESULTS: sIBM patients presented with higher rates of disease- and muscle-related conditions, such as myalgia, myositis, muscle weakness, dysphagia, pneumonia and falls...
May 10, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28473041/diagnosis-and-management-of-immune-mediated-myopathies
#4
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/28439062/a-rare-case-of-necrotizing-myopathy-and-fibrinous-and-organizing-pneumonia-with-anti-ej-antisynthetase-syndrome-and-ssa-antibodies
#5
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/28424265/effects-of-altered-sialic-acid-biosynthesis-on-n-linked-glycan-branching-and-cell-surface-interactions
#6
Nam D Pham, Poh-Choo Pang, Soumya Krishnamurthy, Amberlyn M Wands, Paola Grassi, Anne Dell, Stuart M Haslam, Jennifer J Kohler
GNE myopathy is a rare muscle disorder associated with aging and is related to sporadic inclusion body myositis (sIBM), the most common acquired muscle disease of aging. While the cause of sIBM is unknown, GNE myopathy is associated with mutations in UDP-GlcNAc 2-epimerase/ManNAc kinase (GNE). GNE harbors two enzymatic activities required for biosynthesis of sialic acid in mammalian cells. Mutations to both GNE domains are linked to GNE myopathy. However, correlation between mutation-associated reductions in sialic acid production and disease severity is imperfect...
April 19, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28384112/inflammatory-myopathies-with-cutaneous-involvement-from-diagnosis-to-therapy
#7
Lyubomir A Dourmishev
The group of idiopathic inflammatory myopathies (IIM) include various disorders of skeletal muscles with or without skin involvement. The most common types are dermatomyositis (DM), polymyositis (PM), inclusion body myositis (IBM) and necrotizing autoimmune myopathy (NAM). Dermatomyositis subdivides into various clinical forms such as juvenile, amyopathic or paraneoplastic dermatomyositis, scleromyositis, overlap or anti-synthetase syndromes, etc. Recently, numerous new antibodies defining the characteristic clinical phenotype have been described as anti-MDA5 antibodies associated with interstitial lung disease and amyopathic dermatomyositis or anti-TIF1γ antibodies as markers for paraneoplastic dermatomyositis...
March 1, 2017: Folia Medica
https://www.readbyqxmd.com/read/28333717/effect-of-resistance-exercise-on-muscle-metabolism-and-autophagy-in-sibm
#8
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/28330496/calcium-dysregulation-functional-calpainopathy-and-endoplasmic-reticulum-stress-in-sporadic-inclusion-body-myositis
#9
David R Amici, Iago Pinal-Fernandez, Davi A G Mázala, Thomas E Lloyd, Andrea M Corse, Lisa Christopher-Stine, Andrew L Mammen, Eva R Chin
Sporadic inclusion body myositis (IBM) is the most common primary myopathy in the elderly, but its pathoetiology is still unclear. Perturbed myocellular calcium (Ca(2+)) homeostasis can exacerbate many of the factors proposed to mediate muscle degeneration in IBM, such as mitochondrial dysfunction, protein aggregation, and endoplasmic reticulum stress. Ca(2+) dysregulation may plausibly be initiated in IBM by immune-mediated membrane damage and/or abnormally accumulating proteins, but no studies to date have investigated Ca(2+) regulation in IBM patients...
March 22, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28318044/pathomechanisms-of-anti-cytosolic-5-nucleotidase-1a-autoantibodies-in-sporadic-inclusion-body-myositis
#10
Nozomu Tawara, Satoshi Yamashita, Xiao Zhang, Mai Korogi, Ziwei Zhang, Tsukasa Doki, Yoshimasa Matsuo, Shunya Nakane, Yasushi Maeda, Kazuma Sugie, Naoki Suzuki, Masashi Aoki, Yukio Ando
OBJECTIVE: Sporadic inclusion body myositis (sIBM), an intractable progressive muscle disease, frequently occurs in older persons. sIBM pathogenesis may involve protein degradation dysfunction and immune abnormalities. Autoantibodies recognizing cytosolic 5'-nucleotidase 1A (cN1A) were found in plasma and serum from sIBM patients. However, whether anti-cN1A autoantibodies play a pathogenic role in sIBM is controversial. This study investigated the pathogenic properties of anti-cN1A autoantibodies in sIBM pathogenesis...
April 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28318035/inclusion-body-myositis-pathogenesis-steady-progress
#11
Steven A Greenberg
No abstract text is available yet for this article.
April 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28283597/overlapping-features-of-polymyositis-and-inclusion-body-myositis-in-hiv-infected-patients
#12
Thomas E Lloyd, Iago Pinal-Fernandez, E Harlan Michelle, Lisa Christopher-Stine, Katherine Pak, Ned Sacktor, Andrew L Mammen
OBJECTIVE: To characterize patients with myositis with HIV infection. METHODS: All HIV-positive patients with myositis seen at the Johns Hopkins Myositis Center from 2003 to 2013 were included in this case series. Muscle biopsy features, weakness pattern, serum creatine kinase (CK) level, and anti-nucleotidase 1A (NT5C1A) status of HIV-positive patients with myositis were assessed. RESULTS: Eleven of 1,562 (0.7%) patients with myositis were HIV-positive...
April 11, 2017: Neurology
https://www.readbyqxmd.com/read/28279643/follistatin-gene-therapy-for-sporadic-inclusion-body-myositis-improves-functional-outcomes
#13
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...
April 5, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28259850/blood-flow-restriction-training-in-clinical-musculoskeletal-rehabilitation-a-systematic-review-and-meta-analysis
#14
REVIEW
Luke Hughes, Bruce Paton, Ben Rosenblatt, Conor Gissane, Stephen David Patterson
BACKGROUND AND OBJECTIVE: Low-load exercise training with blood flow restriction (BFR) can increase muscle strength and may offer an effective clinical musculoskeletal (MSK) rehabilitation tool. The aim of this review was to systematically analyse the evidence regarding the effectiveness of this novel training modality in clinical MSK rehabilitation. DESIGN: This is a systematic review and meta-analysis of peer-reviewed literature examining BFR training in clinical MSK rehabilitation (Research Registry; researchregistry91)...
March 4, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28221303/a-case-of-asymptomatic-inclusion-body-myositis
#15
Rey Bello, Tulio Bertorini, Kartheek Ganta, William Mays
OBJECTIVES: To present a case of asymptomatic inclusion body myositis. METHODS: The authors report a case of a 67-year-old man who presented with idiopathic hyperCKemia. Physical examination including a complete neurological evaluation was unremarkable. Systemic causes of hyperCKemia, including medication side effects, metabolic and endocrine disorders, and connective tissue disorders, were ruled out with various indicated tests. RESULTS: Two and a half years after initial consultation, the patient reported left knee pain...
March 2017: Journal of Clinical Neuromuscular Disease
https://www.readbyqxmd.com/read/28215761/fist-sign-in-inclusion-body-myositis
#16
Zen Kobayashi, Emi Fukatsu, Sakiko Itaya, Miho Akaza, Kiyobumi Ota, Yoshiyuki Numasawa, Satoru Ishibashi, Hiroyuki Tomimitsu, Shuzo Shintani
No abstract text is available yet for this article.
January 25, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28187529/physical-function-and-muscle-strength-in-sporadic-inclusion-body-myositis
#17
Anders N Jørgensen, Per Aagaard, Jakob L Nielsen, Mette Christiansen, Lars G Hvid, Ulrik Frandsen, Louise P Diederichsen
INTRODUCTION: Self-reported physical function, functional capacity, and isolated muscle function were investigated in sporadic inclusion body myositis (sIBM) patients. METHODS: SF-36 health survey and 2-min Walk test (2MWT), Timed Up & Go test (TUG), and 30-sec Chair Stand performance were evaluated. Additionally, patients were tested for knee extensor muscle strength (KinCom) and leg extension power (Nottingham Power Rig). RESULTS: TUG performance was the strongest predictor of self-reported physical function (r(2) =0...
February 10, 2017: Muscle & Nerve
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
#18
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
#19
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/28159418/the-role-of-p62-sqstm1-in-sporadic-inclusion-body-myositis
#20
Satoshi Nakano, Mitsuaki Oki, Hirofumi Kusaka
We examined selective autophagy against ubiquitinated protein aggregates in sporadic inclusion body myositis (s-IBM) patients. The form of autophagy requires phosphorylation of serine 403 in p62/SQSTM1 to bind to Lys63-linked ubiquitin and the binding of the p62-ubiquitinated protein conjugates to LC3. In muscle biopsy specimens from 16 s-IBM patients, we compared the distribution of p62 (aa120-440) with 1) Ser403-phosphorylated p62 (S403-pp62), 2) Lys63-linked ubiquitin and 3) LC3 in double-colour immunofluorescence microscopy...
December 29, 2016: Neuromuscular Disorders: NMD
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