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https://www.readbyqxmd.com/read/29780824/clinical-histological-and-immunohistochemical-findings-in-inclusion-body-myositis
#1
Leonardo Valente de Camargo, Mary Souza de Carvalho, Samuel Katsuyuki Shinjo, Acary Souza Bulle de Oliveira, Edmar Zanoteli
Sporadic inclusion body myositis (sIBM) is considered the most common acquired myopathy aged over 50 years. The disease is characterized by a particular process of muscle degeneration characterized by abnormal deposit of protein aggregates in association with inflammation. The aim of this study was to present clinical and muscle histopathological findings, including immunostaining for LC3B, p62, α -synuclein, and TDP-43, in 18 patients with sIBM. The disease predominated in males (61%) and European descendants, with onset of clinical manifestations around 59 years old...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29775118/blood-flow-restricted-resistance-training-in-patients-with-sporadic-inclusion-body-myositis-a-randomized-controlled-trial
#2
A N Jørgensen, P Aagaard, U Frandsen, E Boyle, L P Diederichsen
OBJECTIVES: To investigate the effect of 12 weeks of low-load blood-flow restricted resistance (BFR) training on self-reported and objective physical function, and maximal muscle strength in patients with sporadic inclusion body myositis (sIBM). METHOD: Twenty-two patients with sIBM were randomized into a training group (BFR group) or a non-exercising control group, according to CONsolidated Standards Of Reporting Trials (CONSORT) guidelines. The BFR group performed 12 weeks of BFR training twice per week...
May 18, 2018: Scandinavian Journal of Rheumatology
https://www.readbyqxmd.com/read/29770361/differential-diagnosis-of-vacuolar-muscle-biopsies-use-of-p62-lc3-and-lamp2-immunohistochemistry
#3
Elisa Vittonatto, Silvia Boschi, Loredana CHIADò-Piat, Valentina Ponzalino, Sara Bortolani, Chiara Brusa, Innocenzo Rainero, Federica Ricci, Liliana Vercelli, Tiziana Mongini
Intrafibral vacuoles are the morphological hallmark in a wide variety of human skeletal muscle disorders with different etiology. In most cases, differential diagnosis is feasible with a routine histochemical work up of muscle biopsy. Ultrastructural analysis is an important confirmatory tool, but it is not widely available. Immunohistochemical stainings for p62, LAMP2 and LC3 are commonly available as tissutal marker for autophagy. We compared the immunohistochemical patterns for autophagic markers p62, LC3 and LAMP2 with routine histochemical markers in 39 biopsies from patients with definite diagnoses of glycogen storage disease type 2 (LOPD or Pompe disease, PD), sporadic inclusion body myositis (sIBM), oculo-pharyngeal muscular dystrophy (OPMD) and necrotizing myopathy (NM)...
December 2017: Acta Myologica: Myopathies and Cardiomyopathies: Official Journal of the Mediterranean Society of Myology
https://www.readbyqxmd.com/read/29766941/idiopathic-inflammatory-myopathies-in-adults-a-comparative-study-of-bohan-and-peter-and-european-neuromuscular-center-2004-criteria
#4
Sundaram Challa, Saumya Jakati, Megha S Uppin, Meena A Kannan, Rajasekhar Liza, M K Murthy Jagarlapudi
Background: Bohan and Peter criteria are widely used for the diagnosis of idiopathic inflammatory myopathies (IIMs). Recently, European Neuromuscular Center (ENMC) formulated criteria to identify subgroups of IIMs. Aim: To compare the two diagnostic criteria in adult IIMs. Materials and Methods: This was a retrospective review of case records of histologically confirmed IIMs in adults between January 2014 and May 2015. Both the Bohan and Peter, and ENMC 2004 criteria were applied in the same group of patients to subgroup the IIMs...
May 2018: Neurology India
https://www.readbyqxmd.com/read/29745890/pattern-of-muscle-involvement-in-inclusion-body-myositis-a-sonographic-study
#5
Jemima Albayda, Lisa Christopher-Stine, Clifton O Bingham Iii, Julie J Paik, Eleni Tiniakou, Seth Billings, O Manny Uy, Philippe Burlina
OBJECTIVES: Imaging plays a role in myositis assessment by detecting muscle changes indicative of pathology. This study was conducted to determine the ultrasonographic pattern of muscle involvement in patients with inclusion body myositis (IBM) through an assessment of muscle echointensity. METHODS: Sixty-two individuals were consecutively studied, 18 with IBM, 16 with polymyositis or dermatomyositis and 28 normal controls. Standardised scans were completed bilaterally for the deltoids, biceps, flexor digitorum profundus (FDP), flexor carpi ulnaris, rectus femoris, tibialis anterior and gastrocnemius assessing for muscle echointensity changes...
May 8, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29706410/muscle-shear-wave-elastography-in-inclusion-body-myositis-feasibility-reliability-and-relationships-with-muscle-impairments
#6
Damien Bachasson, Guillaume J R Dubois, Yves Allenbach, Olivier Benveniste, Jean-Yves Hogrel
Degenerative muscle changes may be associated with changes in muscle mechanical properties. Shear wave elastography (SWE) allows direct quantification of muscle shear modulus (MSM). The aim of this study was to evaluate the feasibility and reliability of SWE in the severely disordered muscle as observed in inclusion body myositis. To explore the clinical relevance of SWE, potential relationships between MSM values and level muscle impairments (weakness and ultrasound-derived muscle thickness and echo intensity) were investigated...
April 26, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29669460/current-diagnosis-and-treatment-of-polymyositis-and-dermatomyositis
#7
Hirokazu Sasaki, Hitoshi Kohsaka
Idiopathic inflammatory myopathies (IIMs) are heterogeneous disorders that affect the skeletal muscles. Polymyositis, dermatomyositis, and inclusion body myositis are major IIM subsets. Immune-mediated necrotizing myopathy became recognized as a potentially new IIM subset. Since the new classification criteria published by the International Myositis Classification Criteria Project have higher sensitivity and specificity for IIM classification and subclassification than the previous criteria, they should help precise diagnosis...
April 18, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/29663456/label-free-identification-of-myopathological-features-with-coherent-anti-stokes-raman-scattering
#8
Daniel Niedieker, Frederik Großerüschkamp, Anja Schreiner, Katalin Barkovits, Carsten Kötting, Katrin Marcus, Klaus Gerwert, Matthias Vorgerd
INTRODUCTION: The aim of this study was the label-free identification of distinct myopathological features with coherent anti-Stokes Raman scattering (CARS) imaging, which leaves the sample intact for further analysis. METHODS: The protein distribution was determined without labels by CARS at 2930 cm-1 and was compared with the results of standard histological staining. RESULTS: CARS imaging enabled the visualization of glycogen accumulation in glycogen storage disease type 5 (McArdle) and of internal nuclei in centronuclear myopathy...
April 16, 2018: Muscle & Nerve
https://www.readbyqxmd.com/read/29651121/classification-of-myositis
#9
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/29611059/new-developments-in-the-genetics-of-inclusion-body-myositis
#10
REVIEW
Kyla A Britson, Stephanie Y Yang, Thomas E Lloyd
PURPOSE OF REVIEW: Our goal is to review the recent literature pertaining to the genetics of sporadic inclusion body myositis (IBM). RECENT FINDINGS: In a study of 252 IBM patients, the class II MHC allele HLA-DRB1*03:01 showed the most significant association with IBM, and that risk could be largely attributed to amino acids within the peptide-binding pocket. Candidate gene sequencing identified rare missense variants in proteins regulating protein homeostasis including VCP and SQSTM1...
April 2, 2018: Current Rheumatology Reports
https://www.readbyqxmd.com/read/29607961/a-patient-with-hcv-infection-and-a-sustained-virological-response-to-direct-acting-antiviral-treatment-who-developed-inclusion-body-myositis
#11
Toru Kuwano, Norio Akuta, Fumitaka Suzuki, Shunichiro Fujiyama, Yusuke Kawamura, Hitomi Sezaki, Tetsuya Hosaka, Satoshi Saitoh, Masahiro Kobayashi, Yoshiyuki Suzuki, Mariko Kobayashi, Yasuji Arase, Kenji Ikeda, Hiromitsu Kumada
We report the case of a 75-year-old woman who was found to have hepatitis C virus (HCV) infection in 1987. Before treatment in 2016, she was found to have mixed cryoglobulinemia (MC). Direct-acting antiviral (DAA) treatment produced a sustained virological response 12 (SVR12). She noticed gradual muscle weakness in 2015 and the gradual development of dysarthria and dysphagia in 2017. We performed a muscle biopsy that showed inclusion body myositis (IBM). To the best of our knowledge, this is first case of a patient with HCV infection, MC, and IBM, in which MC and IBM did not improve after an SVR12 was obtained by DAA treatment...
March 30, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29595280/-idiopathic-inflammatory-myopathies
#12
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/29579291/sporadic-inclusion-body-myositis-magnetic-resonance-imaging-and-ultrasound-characteristics
#13
Kazuto Tsukita, Kaoru Yagita, Haruhi Sakamaki-Tsukita, Toshihiko Suenaga
No abstract text is available yet for this article.
March 22, 2018: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29546591/endoplasmic-reticulum-stress-induces-myostatin-high-molecular-weight-aggregates-and-impairs-mature-myostatin-secretion
#14
Rishibha Sachdev, Karin Kappes-Horn, Lydia Paulsen, Yvonne Duernberger, Catharina Pleschka, Philip Denner, Bishwajit Kundu, Jens Reimann, Ina Vorberg
Sporadic inclusion body myositis (sIBM) is the most prevalent acquired muscle disorder in the elderly with no defined etiology or effective therapy. Endoplasmic reticulum stress and deposition of myostatin, a secreted negative regulator of muscle growth, have been implicated in disease pathology. The myostatin signaling pathway has emerged as a major target for symptomatic treatment of muscle atrophy. Here, we systematically analyzed the maturation and secretion of myostatin precursor MstnPP and its metabolites in a human muscle cell line...
March 15, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29529264/rapamycin-for-inclusion-body-myositis-targeting-non-inflammatory-mechanisms
#15
James B Lilleker, Marwan Bukhari, Hector Chinoy
No abstract text is available yet for this article.
February 26, 2018: Rheumatology
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
#16
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)...
May 1, 2018: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29515464/localization-and-expression-of-nuclear-factor-of-activated-t-cells-5-in-myoblasts-exposed-to-pro-inflammatory-cytokines-or-hyperosmolar-stress-and-in-biopsies-from-myositis-patients
#17
Sandrine Herbelet, Elly De Vlieghere, Amanda Gonçalves, Boel De Paepe, Karsten Schmidt, Eline Nys, Laurens Weynants, Joachim Weis, Gert Van Peer, Jo Vandesompele, Jens Schmidt, Olivier De Wever, Jan L De Bleecker
Aims: Regeneration in skeletal muscle relies on regulated myoblast migration and differentiation, in which the transcription factor nuclear factor of activated T-cells 5 (NFAT5) participates. Impaired muscle regeneration and chronic inflammation are prevalent in myositis. Little is known about the impact of inflammation on NFAT5 localization and expression in this group of diseases. The goal of this study was to investigate NFAT5 physiology in unaffected myoblasts exposed to cytokine or hyperosmolar stress and in myositis...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29482084/electromyographic-findings-in-sporadic-inclusion-body-myositis
#18
Monika Nojszewska, Malgorzata Gawel, Biruta Kierdaszuk, Janusz Sierdziński, Elżbieta Szmidt-Sałkowska, Andrzej Seroka, Anna M Kamińska, Anna Kostera-Pruszczyk
INTRODUCTION: Clinically oriented diagnostic criteria can be as specific for diagnosis of sporadic inclusion body myositis (sIBM) as pathological criteria, especially at the time of presentation. EMG may provide an convincing proof that a muscle biopsy should be performed. AIMS: To compare the EMG results in patients with sIBM divided into subgroups based on the newest ENMC criteria for sIBM and to obtain the utility of EMG in the diagnostic process at the time of presentation...
April 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29465613/what-is-in-the-myopathy-literature
#19
David Lacomis
This review is focused on recent reports of sporadic inclusion body myositis (sIBM), myopathy in patients with human immunodeficiency virus type 1 (HIV) infection, and necrotizing autoimmune myopathy with antibodies to signal recognition particle. The sIBM articles cover associations with certain genetic polymorphisms, the possible pathogenic role of anti-cytosolic 5'-nucleotidase 1A antibody, and disease-related burden and health care costs. Another article addressed the possible pathogenic role of signal recognition particle antibody in necrotizing myopathy...
March 2018: Journal of Clinical Neuromuscular Disease
https://www.readbyqxmd.com/read/29428167/local-texture-anisotropy-as-an-estimate-of-muscle-quality-in-ultrasound-imaging
#20
Guillaume J R Dubois, Damien Bachasson, Lilian Lacourpaille, Olivier Benveniste, Jean-Yves Hogrel
This study introduces local pattern texture anisotropy as a novel parameter to differentiate healthy and disordered muscle and to gauge the severity of muscle impairments based on B-mode ultrasound images. Preliminary human results are also presented. A local pattern texture anisotropy index (TAI) was computed in one region of interest in the short head of the biceps brachii. The effects of gain settings and box sizes required for TAI computation were investigated. Between-day reliability was studied in patients with sporadic inclusion body myositis (n = 26)...
May 2018: Ultrasound in Medicine & Biology
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