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Inclusion body myopathy

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https://www.readbyqxmd.com/read/29770361/differential-diagnosis-of-vacuolar-muscle-biopsies-use-of-p62-lc3-and-lamp2-immunohistochemistry
#1
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
#2
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/29754758/novel-valosin-containing-protein-mutations-associated-with-multisystem-proteinopathy
#3
Sejad Al-Tahan, Ebaa Al-Obeidi, Hiroshi Yoshioka, Anita Lakatos, Lan Weiss, Marjorie Grafe, Johanna Palmio, Matt Wicklund, Yadollah Harati, Molly Omizo, Bjarne Udd, Virginia Kimonis
Over fifty missense mutations in the gene coding for valosin-containing protein (VCP) are associated with a unique autosomal dominant adult-onset progressive disease associated with combinations of proximo-distal inclusion body myopathy (IBM), Paget's disease of bone (PDB), frontotemporal dementia (FTD), and amyotrophic lateral sclerosis (ALS). We report the clinical, histological, and molecular findings in four new patients/families carrying novel VCP mutations: c.474 G > A (p.M158I); c.478 G > C (p...
April 17, 2018: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/29669460/current-diagnosis-and-treatment-of-polymyositis-and-dermatomyositis
#4
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
#5
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
#6
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/29595280/-idiopathic-inflammatory-myopathies
#7
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/29522204/revisiting-pathological-classification-criteria-for-adult-idiopathic-inflammatory-myopathies-in-depth-analysis-of-muscle-biopsies-and-correlation-between-pathological-diagnosis-and-clinical-manifestations
#8
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/29465613/what-is-in-the-myopathy-literature
#9
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/29402601/mitophagy-in-three-cases-of-immune-mediated-necrotizing-myopathy-associated-with-anti-3-hydroxy-3-methylglutaryl-coenzyme-a-reductase-autoantibodies-ultrastructural-and-immunohistochemical-studies
#10
Shiro Matsubara, Kota Bokuda, Yuri Asano, Ryo Morishima, Keizo Sugaya, Kazuhito Miyamoto, Reiji Koide, Takashi Komori, Shigeaki Suzuki, Ichizo Nishino
Immune-mediated necrotizing myopathy (IMNM) associated with anti-3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMGCR) autoantibodies occurs in patients both with and without history of statin-intake. The mechanisms of muscle fiber degeneration in this condition remain unknown. We studied pathological changes in muscle biopsies from three patients lacking history of statin-intake. Ultrastructural observations showed accumulation of degenerating mitochondria, glycogen granules and autophagic vacuoles, forming large composites in three cases, along with various nonspecific changes...
March 2018: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/29396013/coexistence-of-anti-jo1-and-anti-signal-recognition-particle-antibodies-in-a-polymyositis-patient
#11
Enrique Melguizo Madrid, Patricia Fernández Riejos, Francisco Javier Toyos Sáenz de Miera, Berta Fernández Pérez, Concepción González Rodríguez
Idiopathic inflammatory myopathies are a heterogeneous group of potentially treatable myopathies. They are classified, on the basis of clinical and histopathological features, into four subtypes: dermatomyositis, polymyositis, necrotizing autoimmune myositis and inclusion-body myositis. Myositis-associated antibodies and myositis-specific autoantibodies are frequently found in patients with idiopathic inflammatory myopathies, and are useful in the diagnosis and classification. Anti-histidyl transfer RNA synthetase antibody is the most widely prevalent and is highly specific for polymyositis...
January 25, 2018: Reumatología Clinica
https://www.readbyqxmd.com/read/29310658/the-involvement-of-endoplasmic-reticulum-formation-and-protein-synthesis-efficiency-in-vcp-and-atl1-related-neurological-disorders
#12
REVIEW
Yu-Tzu Shih, Yi-Ping Hsueh
The endoplasmic reticulum (ER) is the biggest organelle in cells and is involved in versatile cellular processes. Formation and maintenance of ER morphology are regulated by a series of proteins controlling membrane fusion and curvature. At least six different ER morphology regulators have been demonstrated to be involved in neurological disorders-including Valosin-containing protein (VCP), Atlastin-1 (ATL1), Spastin (SPAST), Reticulon 2 (RTN2), Receptor expression enhancing protein 1 (REEP1) and RAB10-suggesting a critical role of ER formation in neuronal activity and function...
January 8, 2018: Journal of Biomedical Science
https://www.readbyqxmd.com/read/29172005/cytokine-profiling-of-serum-allows-monitoring-of-disease-progression-in-inclusion-body-myositis
#13
Umesh A Badrising, Roula Tsonaka, Monika Hiller, Erik H Niks, Teresinha Evangelista, Hanns Lochmüller, Jan Jgm Verschuuren, Annemieke Aartsma-Rus, Pietro Spitali
BACKGROUND: Inclusion body myositis is a late onset inflammatory myopathy lacking reliable serum biomarkers for diagnosis and for disease progression. OBJECTIVE: To identify diagnostic and predictive biomarkers, cytokine profiling is used to assess the potential of cytokines to discriminate between cases and controls and to assess whether treatment with methotrexate can influence biomarkers associated with disease progression. METHODS: The diagnostic and follow-up potential of 48 cytokines was tested using Bioplex-assay and ELISA in sera of healthy individuals, IBM patients and patients with other neuromuscular disorders...
2017: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/29151520/dropped-head-syndrome-and-the-presence-of-rimmed-vacuoles-in-a-muscle-biopsy-in-scleroderma-polymyositis-overlap-syndrome-associated-with-anti-ku-antibody
#14
Yoshida Takeshi, Yoshida Mai, Mitsuyo Kinjo, Jonosono Manabu, Higuchi Itsuro
A 66-year-old woman with a history of interstitial lung disease presented with a 3-month history of dropped head syndrome (DHS), followed by camptocormia and extremity weakness. A clinical examination revealed Raynaud phenomenon, arthralgia, distal skin sclerosis, and microbleeds in the nailfold capillaries. An anti-Ku antibody test was positive. A muscle biopsy revealed inflammatory myopathy with rimmed vacuoles (RVs). The diagnosis of scleroderma-polymyositis (SSc-PM) overlap syndrome was made. RVs on a muscle biopsy in a patient with inflammatory myositis involving axial muscles may be seen either in inclusion body myositis or SSc-PM overlap syndrome...
November 20, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29131108/genetic-and-pathological-assessment-of-hnrnpa1-hnrnpa2-b1-and-hnrnpa3-in-familial-and-sporadic-amyotrophic-lateral-sclerosis
#15
Jennifer A Fifita, Katharine Y Zhang, Jasmin Galper, Kelly L Williams, Emily P McCann, Alison L Hogan, Neil Saunders, Denis Bauer, Ingrid S Tarr, Roger Pamphlett, Garth A Nicholson, Dominic Rowe, Shu Yang, Ian P Blair
BACKGROUND: Mutations in the genes encoding the heterogeneous nuclear ribonucleoproteins hnRNPA1 and hnRNPA2/B1 have been reported in a multisystem proteinopathy that includes amyotrophic lateral sclerosis (ALS) and inclusion body myopathy associated with Paget disease of the bone and frontotemporal dementia. Mutations were also described in the prion-like domain of hnRNPA1 in patients with classic ALS. Another hnRNP protein, hnRNPA3, has been found to be associated with the ALS/frontotemporal dementia protein C9orf72...
2017: Neuro-degenerative Diseases
https://www.readbyqxmd.com/read/29127544/a-brazilian-family-with-inclusion-body-myopathy-associated-with-paget-s-disease-of-bone-and-frontotemporal-dementia-linked-to-the-vcp-pgly97glu-mutation
#16
REVIEW
Samuel Katsuyuki Shinjo, Sueli Mieko Oba-Shinjo, Antonio Marcondes Lerario, Suely Kazue Nagahashi Marie
The objective of this study is to report a Brazilian patient and his family with inclusion body myopathy associated with Paget's disease of bone and frontotemporal dementia (IBMPFD). A systematic review of the literature on the valosin-containing protein (VCP) mutation was also performed. The proband (patient) was initially treated as a case of possible refractory polymyositis with Paget's disease and later as an inclusion body myopathy. However, after admission to our service, and considering his personal and familial antecedents, whole exome sequencing was performed revealing valosin-containing protein (VCP) c...
November 10, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/29037990/roles-for-the-vcp-co-factors-npl4-and-ufd1-in-neuronal-function-in-drosophila-melanogaster
#17
Dwayne J Byrne, Mark J Harmon, Jeremy C Simpson, Craig Blackstone, Niamh C O'Sullivan
The VCP-Ufd1-Npl4 complex regulates proteasomal processing within cells by delivering ubiquitinated proteins to the proteasome for degradation. Mutations in VCP are associated with two neurodegenerative diseases, amyotrophic lateral sclerosis (ALS) and inclusion body myopathy with Paget's disease of the bone and frontotemporal dementia (IBMPFD), and extensive study has revealed crucial functions of VCP within neurons. By contrast, little is known about the functions of Npl4 or Ufd1 in vivo. Using neuronal-specific knockdown of Npl4 or Ufd1 in Drosophila melanogaster, we infer that Npl4 contributes to microtubule organization within developing motor neurons...
October 20, 2017: Journal of Genetics and Genomics, Yi Chuan Xue Bao
https://www.readbyqxmd.com/read/28970065/valosin-containing-protein-vcp-is-a-novel-iq-motif-containing-gtpase-activating-protein-1-iqgap1-interacting-protein
#18
Norimichi Itoh, Taku Nagai, Takashi Watanabe, Kentaro Taki, Toshitaka Nabeshima, Kozo Kaibuchi, Kiyofumi Yamada
Scaffold proteins play a pivotal role in making protein complexes, and organize binding partners into a functional unit to enhance specific signaling pathways. IQ motif-containing GTPase activating protein 1 (IQGAP1) is an essential protein for spine formation due to its role in scaffolding multiple signal complexes. However, it remains unclear how IQGAP1 interacts within the brain. In the present study, we screened novel IQGAP1-interacting proteins by a proteomic approach. As a novel IQGAP1-interacting protein, we identified valosin-containing protein (VCP) which is a causative gene in patients with inclusion body myopathy with Paget's disease of bone and frontotemporal dementia (IBMPFD)...
December 2, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28915917/translocation-of-molecular-chaperones-to-the-titin-springs-is-common-in-skeletal-myopathy-patients-and-affects-sarcomere-function
#19
Andreas Unger, Lisa Beckendorf, Pierre Böhme, Rudolf Kley, Marion von Frieling-Salewsky, Hanns Lochmüller, Rolf Schröder, Dieter O Fürst, Matthias Vorgerd, Wolfgang A Linke
Myopathies encompass a wide variety of acquired and hereditary disorders. The pathomechanisms include structural and functional changes affecting, e.g., myofiber metabolism and contractile properties. In this study, we observed increased passive tension (PT) of skinned myofibers from patients with myofibrillar myopathy (MFM) caused by FLNC mutations (MFM-filaminopathy) and limb-girdle muscular dystrophy type-2A due to CAPN3 mutations (LGMD2A), compared to healthy control myofibers. Because the giant protein titin determines myofiber PT, we measured its molecular size and the titin-to-myosin ratio, but found no differences between myopathies and controls...
September 15, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28855174/the-euromyositis-registry-an-international-collaborative-tool-to-facilitate-myositis-research
#20
James B Lilleker, Jiri Vencovsky, Guochun Wang, Lucy R Wedderburn, Louise Pyndt Diederichsen, Jens Schmidt, Paula Oakley, Olivier Benveniste, Maria Giovanna Danieli, Katalin Danko, Nguyen Thi Phuong Thuy, Monica Vazquez-Del Mercado, Helena Andersson, Boel De Paepe, Jan L deBleecker, Britta Maurer, Liza J McCann, Nicolo Pipitone, Neil McHugh, Zoe E Betteridge, Paul New, Robert G Cooper, William E Ollier, Janine A Lamb, Niels Steen Krogh, Ingrid E Lundberg, Hector Chinoy
AIMS: The EuroMyositis Registry facilitates collaboration across the idiopathic inflammatory myopathy (IIM) research community. This inaugural report examines pooled Registry data. METHODS: Cross-sectional analysis of IIM cases from 11 countries was performed. Associations between clinical subtypes, extramuscular involvement, environmental exposures and medications were investigated. RESULTS: Of 3067 IIM cases, 69% were female. The most common IIM subtype was dermatomyositis (DM) (31%)...
August 30, 2017: Annals of the Rheumatic Diseases
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