1
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Geryk M, Charpentier F. Pathophysiological mechanisms of cardiomyopathies induced by desmin gene variants located in the C-Terminus of segment 2B. J Cell Physiol 2024; 239:e31254. [PMID: 38501553 DOI: 10.1002/jcp.31254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 02/28/2024] [Accepted: 03/05/2024] [Indexed: 03/20/2024]
Abstract
Desmin, the most abundant intermediate filament in cardiomyocytes, plays a key role in maintaining cardiomyocyte structure by interconnecting intracellular organelles, and facilitating cardiomyocyte interactions with the extracellular matrix and neighboring cardiomyocytes. As a consequence, mutations in the desmin gene (DES) can lead to desminopathies, a group of diseases characterized by variable and often severe cardiomyopathies along with skeletal muscle disorders. The basic desmin intermediate filament structure is composed of four segments separated by linkers that further assemble into dimers, tetramers and eventually unit-length filaments that compact radially to give the final form of the filament. Each step in this process is critical for proper filament formation and allow specific interactions within the cell. Mutations within the desmin gene can disrupt filament formation, as seen by aggregate formation, and thus have severe cardiac and skeletal outcomes, depending on the locus of the mutation. The focus of this review is to outline the cardiac molecular consequences of mutations located in the C-terminal part of segment 2B. This region is crucial for ensuring proper desmin filament formation and is a known hotspot for mutations that significantly impact cardiac function.
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Affiliation(s)
- Michelle Geryk
- Nantes Université, CNRS, INSERM, L'institut du thorax, Nantes, F-44000, France
| | - Flavien Charpentier
- Nantes Université, CNRS, INSERM, L'institut du thorax, Nantes, F-44000, France
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2
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Smolina N, Khudiakov A, Knyazeva A, Zlotina A, Sukhareva K, Kondratov K, Gogvadze V, Zhivotovsky B, Sejersen T, Kostareva A. Desmin mutations result in mitochondrial dysfunction regardless of their aggregation properties. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165745. [PMID: 32105824 DOI: 10.1016/j.bbadis.2020.165745] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 02/15/2020] [Accepted: 02/21/2020] [Indexed: 12/31/2022]
Abstract
Desmin, being a major intermediate filament of muscle cells, contributes to stabilization and positioning of mitochondria. Desmin mutations have been reported in conjunction with skeletal myopathies accompanied by mitochondrial dysfunction. Depending on the ability to promote intracellular aggregates formation, mutations can be considered aggregate-prone or non-aggregate-prone. The aim of the present study was to describe how expression of different desmin mutant isoforms effects mitochondria and contributes to the development of myocyte dysfunction. To achieve this goal, two non-aggregate-prone (Des S12F and Des A213V) and four aggregate-prone (Des L345P, Des A357P, Des L370P, Des D399Y) desmin mutations were expressed in skeletal muscle cells. We showed that all evaluated mutations affected the morphology of mitochondrial network, suppressed parameters of mitochondrial respiration, diminished mitochondrial membrane potential, increased ADP/ATP ratio, and enhanced mitochondrial DNA (mtDNA) release. mtDNA was partially secreted through exosomes as demonstrated by GW4869 treatment. Dysfunction of mitochondria was observed regardless the type of mutation: aggregate-prone or non-aggregate-prone. However, expression of aggregate-prone mutations resulted in more prominent phenotype. Thus, in this comparative study of six pathogenic desmin mutations that cause skeletal myopathy development, we confirmed a role of mitochondrial dysfunction and mtDNA release in the pathogenesis of desmin myopathies, regardless of the aggregation capacity of the mutated desmin.
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Affiliation(s)
- Natalia Smolina
- Almazov National Medical Research Centre, Saint Petersburg, Russia; Department of Women's and Children's Health, Karolinska Institute, Stockholm, Sweden.
| | | | | | - Anna Zlotina
- Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Kseniya Sukhareva
- Almazov National Medical Research Centre, Saint Petersburg, Russia; University of Verona, Verona, Italy
| | - Kirill Kondratov
- Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Vladimir Gogvadze
- Faculty of medicine, Lomonosov Moscow State University, Moscow, Russia; Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Boris Zhivotovsky
- Faculty of medicine, Lomonosov Moscow State University, Moscow, Russia; Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Thomas Sejersen
- Department of Women's and Children's Health, Karolinska Institute, Stockholm, Sweden
| | - Anna Kostareva
- Almazov National Medical Research Centre, Saint Petersburg, Russia; Department of Women's and Children's Health, Karolinska Institute, Stockholm, Sweden
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3
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Delort F, Segard BD, Hakibilen C, Bourgois-Rocha F, Cabet E, Vicart P, Huang ME, Clary G, Lilienbaum A, Agbulut O, Batonnet-Pichon S. Alterations of redox dynamics and desmin post-translational modifications in skeletal muscle models of desminopathies. Exp Cell Res 2019; 383:111539. [PMID: 31369751 DOI: 10.1016/j.yexcr.2019.111539] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 07/24/2019] [Accepted: 07/27/2019] [Indexed: 11/24/2022]
Abstract
Desminopathies are a type of myofibrillar myopathy resulting from mutations in DES, encoding the intermediate filament protein desmin. They display heterogeneous phenotypes, suggesting environment influences. Patient muscle proteins show oxidative features linking oxidative stress, protein aggregation, and abnormal protein deposition. To improve understanding of redox balance in desminopathies, we further developed cellular models of four pathological mutants localized in 2B helical domain (the most important region for desmin polymerization) to explore desmin behavior upon oxidative stress. We show that the mutations desQ389P and desD399Y share common stress-induced aggregates, desR406W presents more scattered cytoplasmic aggregative pattern, and pretreatment with N-acetyl-l-cysteine (NAC), an antioxidant molecule, prevents all type of aggregation. Mutants desD399Y and desR406W had delayed oxidation kinetics following H2O2 stress prevented by NAC pretreatment. Further, we used AAV-injected mouse models to confirm in vivo effects of N-acetyl-l-cysteine. AAV-desD399Y-injected muscles displayed similar physio-pathological characteristics as observed in patients. However, after 2 months of NAC treatment, they did not have reduced aggregates. Finally, in both models, stress induced some post-translational modifications changing Isoelectric Point, such as potential hyperphosphorylations, and/or molecular weight of human desmin by proteolysis. However, each mutant presented its own pattern that seemed to be post-aggregative. In conclusion, our results indicate that individual desmin mutations have unique pathological molecular mechanisms partly linked to alteration of redox homeostasis. Integrating these mutant-specific behaviors will be important when considering future therapeutics.
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Affiliation(s)
- Florence Delort
- Université de Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, F-75013, Paris, France
| | - Bertrand-David Segard
- Université de Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, F-75013, Paris, France
| | - Coralie Hakibilen
- Université de Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, F-75013, Paris, France
| | - Fany Bourgois-Rocha
- Université de Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, F-75013, Paris, France
| | - Eva Cabet
- Université de Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, F-75013, Paris, France
| | - Patrick Vicart
- Université de Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, F-75013, Paris, France
| | - Meng-Er Huang
- Institut Curie, PSL Research University, CNRS UMR3348, Université Paris-Sud, Université Paris-Saclay, Orsay, 91405, France
| | - Guilhem Clary
- Inserm U1016, Institut Cochin, CNRS UMR8104, Université Paris-Descartes, Sorbonne Paris Cité, Plateforme Protéomique 3P5, Paris, France
| | - Alain Lilienbaum
- Université de Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, F-75013, Paris, France
| | - Onnik Agbulut
- Sorbonne Université, Institut de Biologie Paris-Seine (IBPS), CNRS UMR 8256, Inserm ERL U1164, Biological Adaptation and Ageing, 75005, Paris, France
| | - Sabrina Batonnet-Pichon
- Université de Paris, Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, F-75013, Paris, France.
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Bazoukis G, Letsas KP, Xia Y, Tse G, Li KHC. A novel desmin mutation causing severe left ventricular arrhythmogenic cardiomyopathy/dysplasia. J Thorac Dis 2018; 10:S3100-S3102. [PMID: 30370089 PMCID: PMC6186622 DOI: 10.21037/jtd.2018.07.83] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 07/16/2018] [Indexed: 11/06/2022]
Affiliation(s)
- George Bazoukis
- Second Department of Cardiology, Laboratory of Cardiac Electrophysiology, “Evangelismos” General Hospital of Athens, Athens, Greece
| | - Konstantinos P. Letsas
- Second Department of Cardiology, Laboratory of Cardiac Electrophysiology, “Evangelismos” General Hospital of Athens, Athens, Greece
| | - Yunlong Xia
- Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian 116011, China
| | - Gary Tse
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China
- Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen 518000, China
| | - Ka Hou Christien Li
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China
- Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
- Faculty of Medicine, Newcastle University, Newcastle, UK
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Beauty and the beat: A complicated case of multifocal ectopic Purkinje-related premature contractions. HeartRhythm Case Rep 2018; 4:429-433. [PMID: 30228971 PMCID: PMC6140614 DOI: 10.1016/j.hrcr.2018.05.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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6
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Brodehl A, Gaertner-Rommel A, Milting H. Molecular insights into cardiomyopathies associated with desmin (DES) mutations. Biophys Rev 2018; 10:983-1006. [PMID: 29926427 DOI: 10.1007/s12551-018-0429-0] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 05/22/2018] [Indexed: 12/15/2022] Open
Abstract
Increasing usage of next-generation sequencing techniques pushed during the last decade cardiogenetic diagnostics leading to the identification of a huge number of genetic variants in about 170 genes associated with cardiomyopathies, channelopathies, or syndromes with cardiac involvement. Because of the biochemical and cellular complexity, it is challenging to understand the clinical meaning or even the relevant pathomechanisms of the majority of genetic sequence variants. However, detailed knowledge about the associated molecular pathomechanism is essential for the development of efficient therapeutic strategies in future and genetic counseling. Mutations in DES, encoding the muscle-specific intermediate filament protein desmin, have been identified in different kinds of cardiac and skeletal myopathies. Here, we review the functions of desmin in health and disease with a focus on cardiomyopathies. In addition, we will summarize the genetic and clinical literature about DES mutations and will explain relevant cell and animal models. Moreover, we discuss upcoming perspectives and consequences of novel experimental approaches like genome editing technology, which might open a novel research field contributing to the development of efficient and mutation-specific treatment options.
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Affiliation(s)
- Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development, Heart and Diabetes Centre NRW, Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany.
| | - Anna Gaertner-Rommel
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development, Heart and Diabetes Centre NRW, Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development, Heart and Diabetes Centre NRW, Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany.
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7
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Bermúdez-Jiménez FJ, Carriel V, Brodehl A, Alaminos M, Campos A, Schirmer I, Milting H, Abril BÁ, Álvarez M, López-Fernández S, García-Giustiniani D, Monserrat L, Tercedor L, Jiménez-Jáimez J. Novel Desmin Mutation p.Glu401Asp Impairs Filament Formation, Disrupts Cell Membrane Integrity, and Causes Severe Arrhythmogenic Left Ventricular Cardiomyopathy/Dysplasia. Circulation 2017; 137:1595-1610. [PMID: 29212896 DOI: 10.1161/circulationaha.117.028719] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 11/09/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND Desmin (DES) mutations cause severe skeletal and cardiac muscle disease with heterogeneous phenotypes. Recently, DES mutations were described in patients with inherited arrhythmogenic right ventricular cardiomyopathy/dysplasia, although their cellular and molecular pathomechanisms are not precisely known. Our aim is to describe clinically and functionally the novel DES-p.Glu401Asp mutation as a cause of inherited left ventricular arrhythmogenic cardiomyopathy/dysplasia. METHODS We identified the novel DES mutation p.Glu401Asp in a large Spanish family with inherited left ventricular arrhythmogenic cardiomyopathy/dysplasia and a high incidence of adverse cardiac events. A full clinical evaluation was performed on all mutation carriers and noncarriers to establish clinical and genetic cosegregation. In addition, desmin, and intercalar disc-related proteins expression were histologically analyzed in explanted cardiac tissue affected by the DES mutation. Furthermore, mesenchymal stem cells were isolated and cultured from 2 family members with the DES mutation (1 with mild and 1 with severe symptomatology) and a member without the mutation (control) and differentiated ex vivo to cardiomyocytes. Then, important genes related to cardiac differentiation and function were analyzed by real-time quantitative polymerase chain reaction. Finally, the p.Glu401Asp mutated DES gene was transfected into cell lines and analyzed by confocal microscopy. RESULTS Of the 66 family members screened for the DES-p.Glu401Asp mutation, 23 of them were positive, 6 were obligate carriers, and 2 were likely carriers. One hundred percent of genotype-positive patients presented data consistent with inherited arrhythmogenic cardiomyopathy/dysplasia phenotype with variable disease severity expression, high-incidence of sudden cardiac death, and absence of skeletal myopathy or conduction system disorders. Immunohistochemistry was compatible with inherited arrhythmogenic cardiomyopathy/dysplasia, and the functional study showed an abnormal growth pattern and cellular adhesion, reduced desmin RNA expression, and some other membrane proteins, as well, and desmin aggregates in transfected cells expressing the mutant desmin. CONCLUSIONS The DES-p.Glu401Asp mutation causes predominant inherited left ventricular arrhythmogenic cardiomyopathy/dysplasia with a high incidence of adverse clinical events in the absence of skeletal myopathy or conduction system disorders. The pathogenic mechanism probably corresponds to an alteration in desmin dimer and oligomer assembly and its connection with membrane proteins within the intercalated disc.
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MESH Headings
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Arrhythmias, Cardiac/diagnosis
- Arrhythmias, Cardiac/genetics
- Arrhythmias, Cardiac/physiopathology
- Cardiomyopathies/diagnosis
- Cardiomyopathies/genetics
- Cardiomyopathies/physiopathology
- Cell Differentiation/genetics
- Cells, Cultured
- Child
- Desmin/genetics
- Desmin/metabolism
- Electrocardiography
- Female
- Genetic Predisposition to Disease
- Heart Defects, Congenital/diagnosis
- Heart Defects, Congenital/genetics
- Heart Defects, Congenital/physiopathology
- Heart Ventricles/abnormalities
- Heart Ventricles/metabolism
- Heart Ventricles/physiopathology
- Heredity
- Heterozygote
- Humans
- Magnetic Resonance Imaging
- Male
- Mesenchymal Stem Cells/metabolism
- Mesenchymal Stem Cells/pathology
- Middle Aged
- Mutation
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Pedigree
- Phenotype
- Spain
- Young Adult
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Affiliation(s)
- Francisco José Bermúdez-Jiménez
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.).
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Víctor Carriel
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Centre North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany (A.B., I.S., H.M.)
| | - Miguel Alaminos
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Antonio Campos
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Ilona Schirmer
- Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Centre North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany (A.B., I.S., H.M.)
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Centre North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany (A.B., I.S., H.M.)
| | - Beatriz Álvarez Abril
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Miguel Álvarez
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Silvia López-Fernández
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | | | - Lorenzo Monserrat
- Cardiology Department, Health in Code, A Coruña, Spain (D.G.-G., L.M.)
| | - Luis Tercedor
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Juan Jiménez-Jáimez
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
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8
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Phenotypic expression of a novel desmin gene mutation: hypertrophic cardiomyopathy followed by systemic myopathy. J Hum Genet 2017; 63:249-254. [DOI: 10.1038/s10038-017-0383-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/07/2017] [Accepted: 10/15/2017] [Indexed: 11/08/2022]
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9
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Even C, Abramovici G, Delort F, Rigato AF, Bailleux V, de Sousa Moreira A, Vicart P, Rico F, Batonnet-Pichon S, Briki F. Mutation in the Core Structure of Desmin Intermediate Filaments Affects Myoblast Elasticity. Biophys J 2017; 113:627-636. [PMID: 28793217 DOI: 10.1016/j.bpj.2017.06.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 06/08/2017] [Accepted: 06/09/2017] [Indexed: 10/19/2022] Open
Abstract
Elastic properties of cells are mainly derived from the actin cytoskeleton. However, intermediate filaments are emerging as major contributors to the mechanical properties of cells. Using atomic force microscopy, we studied the elasticity of mouse myoblasts expressing a mutant form of the gene encoding for desmin intermediate filaments, p.D399Y. This variant produces desmin aggregates, the main pathological symptom of myofibrillar myopathies. Here we show that desmin-mutated cells display a 39% increased median elastic modulus compared to wild-type cells. Desmin-mutated cells required higher forces than wild-type cells to reach high indentation depths, where desmin intermediate filaments are typically located. In addition, heat-shock treatment increased the proportion of cells with aggregates and induced a secondary peak in the distribution of Young's moduli. By performing atomic force microscopy mechanical mapping combined with fluorescence microscopy, we show that higher Young's moduli were measured where desmin aggregates were located, indicating that desmin aggregates are rigid. Therefore, we provide evidence that p.D399Y stiffens mouse myoblasts. Based on these results, we suggest that p.D399Y-related myofibrillar myopathy is at least partly due to altered mechanical properties at the single-cell scale, which are propagated to the tissue scale.
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Affiliation(s)
- Catherine Even
- Laboratoire de Physique des Solides, CNRS, Université Paris Sud, Université Paris-Saclay, Orsay, France.
| | - Gilles Abramovici
- Laboratoire de Physique des Solides, CNRS, Université Paris Sud, Université Paris-Saclay, Orsay, France
| | - Florence Delort
- Unité de Biologie Fonctionnelle et Adaptative,UMR 8251, CNRS, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Anna F Rigato
- Bio AFM Lab, U1006, Inserm, Aix-Marseille Université, Marseille, France
| | - Virginie Bailleux
- Laboratoire de Physique des Solides, CNRS, Université Paris Sud, Université Paris-Saclay, Orsay, France
| | - Abel de Sousa Moreira
- Laboratoire de Physique des Solides, CNRS, Université Paris Sud, Université Paris-Saclay, Orsay, France
| | - Patrick Vicart
- Unité de Biologie Fonctionnelle et Adaptative,UMR 8251, CNRS, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Felix Rico
- Bio AFM Lab, U1006, Inserm, Aix-Marseille Université, Marseille, France
| | - Sabrina Batonnet-Pichon
- Unité de Biologie Fonctionnelle et Adaptative,UMR 8251, CNRS, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Fatma Briki
- Laboratoire de Physique des Solides, CNRS, Université Paris Sud, Université Paris-Saclay, Orsay, France.
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10
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Charrier EE, Asnacios A, Milloud R, De Mets R, Balland M, Delort F, Cardoso O, Vicart P, Batonnet-Pichon S, Hénon S. Desmin Mutation in the C-Terminal Domain Impairs Traction Force Generation in Myoblasts. Biophys J 2016; 110:470-480. [PMID: 26789769 DOI: 10.1016/j.bpj.2015.11.3518] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 11/06/2015] [Accepted: 11/23/2015] [Indexed: 02/08/2023] Open
Abstract
The cytoskeleton plays a key role in the ability of cells to both resist mechanical stress and generate force, but the precise involvement of intermediate filaments in these processes remains unclear. We focus here on desmin, a type III intermediate filament, which is specifically expressed in muscle cells and serves as a skeletal muscle differentiation marker. By using several complementary experimental techniques, we have investigated the impact of overexpressing desmin and expressing a mutant desmin on the passive and active mechanical properties of C2C12 myoblasts. We first show that the overexpression of wild-type-desmin increases the overall rigidity of the cells, whereas the expression of a mutated E413K desmin does not. This mutation in the desmin gene is one of those leading to desminopathies, a subgroup of myopathies associated with progressive muscular weakness that are characterized by the presence of desmin aggregates and a disorganization of sarcomeres. We show that the expression of this mutant desmin in C2C12 myoblasts induces desmin network disorganization, desmin aggregate formation, and a small decrease in the number and total length of stress fibers. We finally demonstrate that expression of the E413K mutant desmin also alters the traction forces generation of single myoblasts lacking organized sarcomeres.
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Affiliation(s)
- Elisabeth E Charrier
- Unité de Biologie Fonctionnelle et Adaptative, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR 8251, Paris, France; Matière et Systèmes Complexes, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR 7057, Paris, France
| | - Atef Asnacios
- Matière et Systèmes Complexes, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR 7057, Paris, France
| | - Rachel Milloud
- LIPhy Université Grenoble 1, CNRS, UMR 5588, Grenoble, France
| | - Richard De Mets
- LIPhy Université Grenoble 1, CNRS, UMR 5588, Grenoble, France
| | - Martial Balland
- LIPhy Université Grenoble 1, CNRS, UMR 5588, Grenoble, France
| | - Florence Delort
- Unité de Biologie Fonctionnelle et Adaptative, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR 8251, Paris, France
| | - Olivier Cardoso
- Matière et Systèmes Complexes, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR 7057, Paris, France
| | - Patrick Vicart
- Unité de Biologie Fonctionnelle et Adaptative, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR 8251, Paris, France
| | - Sabrina Batonnet-Pichon
- Unité de Biologie Fonctionnelle et Adaptative, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR 8251, Paris, France
| | - Sylvie Hénon
- Matière et Systèmes Complexes, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR 7057, Paris, France.
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11
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Antioxidant Treatment and Induction of Autophagy Cooperate to Reduce Desmin Aggregation in a Cellular Model of Desminopathy. PLoS One 2015; 10:e0137009. [PMID: 26333167 PMCID: PMC4557996 DOI: 10.1371/journal.pone.0137009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 08/11/2015] [Indexed: 11/19/2022] Open
Abstract
Desminopathies, a subgroup of myofibrillar myopathies (MFMs), the progressive muscular diseases characterized by the accumulation of granulofilamentous desmin-positive aggregates, result from mutations in the desmin gene (DES), encoding a muscle-specific intermediate filament. Desminopathies often lead to severe disability and premature death from cardiac and/or respiratory failure; no specific treatment is currently available. To identify drug-targetable pathophysiological pathways, we performed pharmacological studies in C2C12 myoblastic cells expressing mutant DES. We found that inhibition of the Rac1 pathway (a G protein signaling pathway involved in diverse cellular processes), antioxidant treatment, and stimulation of macroautophagy reduced protein aggregation by up to 75% in this model. Further, a combination of two or three of these treatments was more effective than any of them alone. These results pave the way towards the development of the first treatments for desminopathies and are potentially applicable to other muscle or brain diseases associated with abnormal protein aggregation.
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12
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Weihl CC, Baloh RH, Lee Y, Chou TF, Pittman SK, Lopate G, Allred P, Jockel-Balsarotti J, Pestronk A, Harms MB. Targeted sequencing and identification of genetic variants in sporadic inclusion body myositis. Neuromuscul Disord 2015; 25:289-96. [PMID: 25617006 DOI: 10.1016/j.nmd.2014.12.009] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 12/15/2014] [Accepted: 12/28/2014] [Indexed: 12/14/2022]
Abstract
Sporadic inclusion body myositis (sIBM) has clinical, pathologic and pathomechanistic overlap with some inherited muscle and neurodegenerative disorders. In this study, DNA from 79 patients with sIBM was collected and the sequencing of 38 genes associated with hereditary inclusion body myopathy (IBM), myofibrillar myopathy, Emery-Dreifuss muscular dystrophy, distal myopathy, amyotrophic lateral sclerosis and dementia along with C9orf72 hexanucleotide repeat analysis was performed. No C9orf72 repeat expansions were identified, but; 27 rare (minor allele frequency <1%) missense coding variants in several other genes were identified. One patient carried a p.R95C missense mutation in VCP and another carried a previously reported p.I27V missense mutation in VCP. Mutations in VCP cause IBM associated with Paget's disease of the bone (PDB) and fronto-temporal dementia (IBMPFD). Neither patient had a family history of weakness or manifested other symptoms reported with VCP mutations such as PDB or dementia. In vitro analysis of these VCP variants found that they both disrupted autophagy similar to other pathogenic mutations. Although no clear genetic etiology has been implicated in sIBM pathogenesis, our study suggests that genetic evaluation in sIBM may be clinically meaningful and lend insight into its pathomechanism.
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Affiliation(s)
- Conrad C Weihl
- Department of Neurology, Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO 63110, United States.
| | - Robert H Baloh
- Department of Neurology, Regenerative Medicine Institute, Cedars-Sinai Medical Center, 8730 Alden Drive, Los Angeles, CA 90048, United States
| | - Youjin Lee
- Department of Neurology, Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO 63110, United States
| | - Tsui-Fen Chou
- Division of Medical Genetics, Department of Pediatrics, Harbor-UCLA Medical Centre, Los Angeles Biomedical Research Institute, Torrance, CA 90502, United States
| | - Sara K Pittman
- Department of Neurology, Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO 63110, United States
| | - Glenn Lopate
- Department of Neurology, Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO 63110, United States
| | - Peggy Allred
- Department of Neurology, Regenerative Medicine Institute, Cedars-Sinai Medical Center, 8730 Alden Drive, Los Angeles, CA 90048, United States
| | - Jennifer Jockel-Balsarotti
- Department of Neurology, Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO 63110, United States
| | - Alan Pestronk
- Department of Neurology, Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO 63110, United States
| | - Matthew B Harms
- Department of Neurology, Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO 63110, United States
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13
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Weihl CC, Iyadurai S, Baloh RH, Pittman SK, Schmidt RE, Lopate G, Pestronk A, Harms MB. Autophagic vacuolar pathology in desminopathies. Neuromuscul Disord 2014; 25:199-206. [PMID: 25557463 DOI: 10.1016/j.nmd.2014.12.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 11/11/2014] [Accepted: 12/08/2014] [Indexed: 01/14/2023]
Abstract
Autophagic vacuolar myopathies are an emerging group of muscle diseases with common pathologic features. These include autophagic vacuoles containing both lysosomal and autophagosomal proteins sometimes lined with sarcolemmal proteins such as dystrophin. These features have been most clearly described in patients with Danon's disease due to LAMP2 deficiency and X-linked myopathy with excessive autophagy (XMEA) due to mutations in VMA21. Disruptions of these proteins lead to lysosomal dysfunction and subsequent autophagic vacuolar pathology. We performed whole exome sequencing on two families with autosomal dominantly inherited myopathies with autophagic vacuolar pathology and surprisingly identified a p.R454W tail domain mutation and a novel p.S6W head domain mutation in desmin, DES. In addition, re-evaluation of muscle tissue from another family with a novel p.I402N missense DES mutation also identified autophagic vacuoles. We suggest that autophagic vacuoles may be an underappreciated pathology present in desminopathy patient muscle. Moreover, autophagic vacuolar pathology can be due to genetic etiologies unrelated to primary defects in the lysosomes or autophagic machinery. Specifically, cytoskeletal derangement and the accumulation of aggregated proteins such as desmin may activate the autophagic system leading to the pathologic features of an autophagic vacuolar myopathy.
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Affiliation(s)
- Conrad C Weihl
- Department of Neurology and Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO, USA.
| | - Stanley Iyadurai
- Department of Neurology, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Robert H Baloh
- Department of Neurology, Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Sara K Pittman
- Department of Neurology and Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO, USA
| | - Robert E Schmidt
- Department of Pathology, Washington University School of Medicine, Saint Louis, MO, USA
| | - Glenn Lopate
- Department of Neurology and Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO, USA
| | - Alan Pestronk
- Department of Neurology and Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO, USA
| | - Matthew B Harms
- Department of Neurology and Hope Center for Neurologic Disorders, Washington University School of Medicine, Saint Louis, MO, USA
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14
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Narayanaswami P, Weiss M, Selcen D, David W, Raynor E, Carter G, Wicklund M, Barohn RJ, Ensrud E, Griggs RC, Gronseth G, Amato AA. Evidence-based guideline summary: diagnosis and treatment of limb-girdle and distal dystrophies: report of the guideline development subcommittee of the American Academy of Neurology and the practice issues review panel of the American Association of Neuromuscular & Electrodiagnostic Medicine. Neurology 2014; 83:1453-63. [PMID: 25313375 DOI: 10.1212/wnl.0000000000000892] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
OBJECTIVE To review the current evidence and make practice recommendations regarding the diagnosis and treatment of limb-girdle muscular dystrophies (LGMDs). METHODS Systematic review and practice recommendation development using the American Academy of Neurology guideline development process. RESULTS Most LGMDs are rare, with estimated prevalences ranging from 0.07 per 100,000 to 0.43 per 100,000. The frequency of some muscular dystrophies varies based on the ethnic background of the population studied. Some LGMD subtypes have distinguishing features, including pattern of muscle involvement, cardiac abnormalities, extramuscular involvement, and muscle biopsy findings. The few published therapeutic trials were not designed to establish clinical efficacy of any treatment. PRINCIPAL RECOMMENDATIONS For patients with suspected muscular dystrophy, clinicians should use a clinical approach to guide genetic diagnosis based on clinical phenotype, inheritance pattern, and associated manifestations (Level B). Clinicians should refer newly diagnosed patients with an LGMD subtype and high risk of cardiac complications for cardiology evaluation even if they are asymptomatic from a cardiac standpoint (Level B). In patients with LGMD with a known high risk of respiratory failure, clinicians should obtain periodic pulmonary function testing (Level B). Clinicians should refer patients with muscular dystrophy to a clinic that has access to multiple specialties designed specifically to care for patients with neuromuscular disorders (Level B). Clinicians should not offer patients with LGMD gene therapy, myoblast transplantation, neutralizing antibody to myostatin, or growth hormone outside of a research study designed to determine efficacy and safety of the treatment (Level R). Detailed results and recommendations are available on the Neurology® Web site at Neurology.org.
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Affiliation(s)
- Pushpa Narayanaswami
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Michael Weiss
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Duygu Selcen
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - William David
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Elizabeth Raynor
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Gregory Carter
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Matthew Wicklund
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Richard J Barohn
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Erik Ensrud
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Robert C Griggs
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Gary Gronseth
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
| | - Anthony A Amato
- From the Department of Neurology (P.N., E.R.), Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA; the Department of Neurology (M.W.), University of Washington Medical Center, Seattle; the Department of Neurology (D.S.), Mayo Clinic, Rochester, MN; the Department of Neurology (W.D.), Massachusetts General Hospital/Harvard Medical School, Boston; St Luke's Rehabilitation Institute (G.C.), Spokane, WA; the Department of Neurology (M.W.), Penn State Hershey Medical Center, PA; the Department of Neurology (R.J.B., G.G.), University of Kansas Medical Center, Kansas City; the Neuromuscular Center (E.E.), Boston VA Medical Center, MA; the Department of Neurology (R.C.G.), University of Rochester Medical Center, NY; and the Department of Neurology (E.E., A.A.A.), Brigham and Women's Hospital/Harvard Medical School, Boston, MA
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Sequence-resolved free energy profiles of stress-bearing vimentin intermediate filaments. Proc Natl Acad Sci U S A 2014; 111:11359-64. [PMID: 25049381 DOI: 10.1073/pnas.1403122111] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Intermediate filaments (IFs) are key to the mechanical strength of metazoan cells. Their basic building blocks are dimeric coiled coils mediating hierarchical assembly of the full-length filaments. Here we use single-molecule force spectroscopy by optical tweezers to assess the folding and stability of coil 2B of the model IF protein vimentin. The coiled coil was unzipped from its N and C termini. When pulling from the C terminus, we observed that the coiled coil was resistant to force owing to the high stability of the C-terminal region. Pulling from the N terminus revealed that the N-terminal half is considerably less stable. The mechanical pulling assay is a unique tool to study and control seed formation and structure propagation of the coiled coil. We then used rigorous theory-based deconvolution for a model-free extraction of the energy landscape and local stability profiles. The data obtained from the two distinct pulling directions complement each other and reveal a tripartite stability of the coiled coil: a labile N-terminal half, followed by a medium stability section and a highly stable region at the far C-terminal end. The different stability regions provide important insight into the mechanics of IF assembly.
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16
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N-acetyl-L-cysteine prevents stress-induced desmin aggregation in cellular models of desminopathy. PLoS One 2013; 8:e76361. [PMID: 24098483 PMCID: PMC3788106 DOI: 10.1371/journal.pone.0076361] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 08/24/2013] [Indexed: 11/19/2022] Open
Abstract
Mutations within the human desmin gene are responsible for a subcategory of myofibrillar myopathies called desminopathies. However, a single inherited mutation can produce different phenotypes within a family, suggesting that environmental factors influence disease states. Although several mouse models have been used to investigate organ-specific desminopathies, a more general mechanistic perspective is required to advance our knowledge toward patient treatment. To improve our understanding of disease pathology, we have developed cellular models to observe desmin behaviour in early stages of disease pathology, e.g., upon formation of cytoplasmic desmin aggregates, within an isogenic background. We cloned the wildtype and three mutant desmin cDNAs using a Tet-On Advanced® expression system in C2C12 cells. Mutations were selected based on positioning within desmin and capacity to form aggregates in transient experiments, as follows: DesS46Y (head domain; low aggregation), DesD399Y (central rod domain; high aggregation), and DesS460I (tail domain; moderate aggregation). Introduction of these proteins into a C2C12 background permitted us to compare between desmin variants as well as to determine the role of external stress on aggregation. Three different types of stress, likely encountered during muscle activity, were introduced to the cell models-thermal (heat shock), redox-associated (H2O2 and cadmium chloride), and mechanical (stretching) stresses-after which aggregation was measured. Cells containing variant DesD399Y were more sensitive to stress, leading to marked cytoplasmic perinuclear aggregations. We then evaluated the capacity of biochemical compounds to prevent this aggregation, applying dexamethasone (an inducer of heat shock proteins), fisetin or N-acetyl-L-cysteine (antioxidants) before stress induction. Interestingly, N-acetyl-L-cysteine pre-treatment prevented DesD399Y aggregation during most stress. N-acetyl-L-cysteine has recently been described as a promising antioxidant in myopathies linked to selenoprotein N or ryanodin receptor defects. Our findings indicate that this drug warrants further study in animal models to speed its potential development as a therapy for DesD399Y-linked desminopathies.
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17
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Maerkens A, Kley RA, Olivé M, Theis V, van der Ven PFM, Reimann J, Milting H, Schreiner A, Uszkoreit J, Eisenacher M, Barkovits K, Güttsches AK, Tonillo J, Kuhlmann K, Meyer HE, Schröder R, Tegenthoff M, Fürst DO, Müller T, Goldfarb LG, Vorgerd M, Marcus K. Differential proteomic analysis of abnormal intramyoplasmic aggregates in desminopathy. J Proteomics 2013; 90:14-27. [PMID: 23639843 DOI: 10.1016/j.jprot.2013.04.026] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 04/03/2013] [Accepted: 04/18/2013] [Indexed: 11/27/2022]
Abstract
UNLABELLED Desminopathy is a subtype of myofibrillar myopathy caused by desmin mutations and characterized by protein aggregates accumulating in muscle fibers. The aim of this study was to assess the protein composition of these aggregates. Aggregates and intact myofiber sections were obtained from skeletal muscle biopsies of five desminopathy patients by laser microdissection and analyzed by a label-free spectral count-based proteomic approach. We identified 397 proteins with 22 showing significantly higher spectral indices in aggregates (ratio >1.8, p<0.05). Fifteen of these proteins not previously reported as specific aggregate components provide new insights regarding pathomechanisms of desminopathy. Results of proteomic analysis were supported by immunolocalization studies and parallel reaction monitoring. Three mutant desmin variants were detected directly on the protein level as components of the aggregates, suggesting their direct involvement in aggregate-formation and demonstrating for the first time that proteomic analysis can be used for direct identification of a disease-causing mutation in myofibrillar myopathy. Comparison of the proteomic results in desminopathy with our previous analysis of aggregate composition in filaminopathy, another myofibrillar myopathy subtype, allows to determine subtype-specific proteomic profile that facilitates identification of the specific disorder. BIOLOGICAL SIGNIFICANCE Our proteomic analysis provides essential new insights in the composition of pathological protein aggregates in skeletal muscle fibers of desminopathy patients. The results contribute to a better understanding of pathomechanisms in myofibrillar myopathies and provide the basis for hypothesis-driven studies. The detection of specific proteomic profiles in different myofibrillar myopathy subtypes indicates that proteomic analysis may become a useful tool in differential diagnosis of protein aggregate myopathies.
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Affiliation(s)
- A Maerkens
- Department of Neurology, Neuromuscular Centre Ruhrgebiet, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany
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Lorenzon A, Beffagna G, Bauce B, De Bortoli M, Li Mura IE, Calore M, Dazzo E, Basso C, Nava A, Thiene G, Rampazzo A. Desmin mutations and arrhythmogenic right ventricular cardiomyopathy. Am J Cardiol 2013; 111:400-5. [PMID: 23168288 PMCID: PMC3554957 DOI: 10.1016/j.amjcard.2012.10.017] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Revised: 10/09/2012] [Accepted: 10/09/2012] [Indexed: 01/28/2023]
Abstract
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited heart muscle disease characterized by fibrofatty replacement of the myocardium and ventricular arrhythmias, associated with mutations in the desmosomal genes. Only a missense mutation in the DES gene coding for desmin, the intermediate filament protein expressed by cardiac and skeletal muscle cells, has been recently associated with ARVC. We screened 91 ARVC index cases (53 negative for mutations in desmosomal genes and an additional 38 carrying desmosomal gene mutations) for DES mutations. Two rare missense variants were identified. The heterozygous p.K241E substitution was detected in 1 patient affected with a severe form of ARVC who also carried the p.T816RfsX10 mutation in plakophilin-2 gene. This DES substitution, showing an allele frequency of <0.01 in the control population, is predicted to cause an intolerant amino acid change in a highly conserved protein domain. Thus, it can be considered a rare variant with a possible modifier effect on the phenotypic expression of the concomitant mutation. The previously known p.A213V substitution was identified in 1 patient with ARVC who was negative for mutations in the desmosomal genes. Because a greater prevalence of p.A213V has been reported in patients with heart dilation than in control subjects, the hypothesis that this rare variant could have an unfavorable effect on cardiac remodeling cannot be ruled out. In conclusion, our data help to establish that, in the absence of skeletal muscle involvement suggestive of a desminopathy, the probability of DES mutations in ARVC is very low. These findings have important implications in the mutation screening strategy for patients with ARVC.
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Affiliation(s)
| | | | - Barbara Bauce
- Department of Cardiothoracic-Vascular Sciences, University of Padua, Padua, Italy
| | | | | | - Martina Calore
- Department of Biology, University of Padua, Padua, Italy
| | - Emanuela Dazzo
- Department of Biology, University of Padua, Padua, Italy
| | - Cristina Basso
- Department of Cardiothoracic-Vascular Sciences, University of Padua, Padua, Italy
| | - Andrea Nava
- Department of Cardiothoracic-Vascular Sciences, University of Padua, Padua, Italy
| | - Gaetano Thiene
- Department of Cardiothoracic-Vascular Sciences, University of Padua, Padua, Italy
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Tse HF, Ho JCY, Choi SW, Lee YK, Butler AW, Ng KM, Siu CW, Simpson MA, Lai WH, Chan YC, Au KW, Zhang J, Lay KWJ, Esteban MA, Nicholls JM, Colman A, Sham PC. Patient-specific induced-pluripotent stem cells-derived cardiomyocytes recapitulate the pathogenic phenotypes of dilated cardiomyopathy due to a novel DES mutation identified by whole exome sequencing. Hum Mol Genet 2013; 22:1395-403. [PMID: 23300193 DOI: 10.1093/hmg/dds556] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In this paper, we report a novel heterozygous mutation of A285V codon conversion on exon 4 of the desmin (DES), using whole exome sequencing (WES) in an isolated proband with documented dilated cardiomyopathy (DCM). This mutation is predicted to cause three-dimensional structure changes of DES. Immunohistological and electron microscopy studies demonstrated diffuse abnormal DES aggregations in DCM-induced-pluripotent stem cell (iPSC)-derived cardiomyocytes, and control-iPSC-derived cardiomyocytes transduced with A285V-DES. DCM-iPSC-derived cardiomyocytes also exhibited functional abnormalities in vitro. This is the first demonstration that patient-specific iPSC-derived cardiomyocytes can be used to provide histological and functional confirmation of a suspected genetic basis for DCM identified by WES.
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Affiliation(s)
- Hung-Fat Tse
- Cardiology Division, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China.
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20
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Desminopathies: pathology and mechanisms. Acta Neuropathol 2013; 125:47-75. [PMID: 23143191 PMCID: PMC3535371 DOI: 10.1007/s00401-012-1057-6] [Citation(s) in RCA: 162] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Revised: 10/15/2012] [Accepted: 10/18/2012] [Indexed: 12/22/2022]
Abstract
The intermediate filament protein desmin is an essential component of the extra-sarcomeric cytoskeleton in muscle cells. This three-dimensional filamentous framework exerts central roles in the structural and functional alignment and anchorage of myofibrils, the positioning of cell organelles and signaling events. Mutations of the human desmin gene on chromosome 2q35 cause autosomal dominant, autosomal recessive, and sporadic myopathies and/or cardiomyopathies with marked phenotypic variability. The disease onset ranges from childhood to late adulthood. The clinical course is progressive and no specific treatment is currently available for this severely disabling disease. The muscle pathology is characterized by desmin-positive protein aggregates and degenerative changes of the myofibrillar apparatus. The molecular pathophysiology of desminopathies is a complex, multilevel issue. In addition to direct effects on the formation and maintenance of the extra-sarcomeric intermediate filament network, mutant desmin affects essential protein interactions, cell signaling cascades, mitochondrial functions, and protein quality control mechanisms. This review summarizes the currently available data on the epidemiology, clinical phenotypes, myopathology, and genetics of desminopathies. In addition, this work provides an overview on the expression, filament formation processes, biomechanical properties, post-translational modifications, interaction partners, subcellular localization, and functions of wild-type and mutant desmin as well as desmin-related cell and animal models.
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21
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Leccia E, Batonnet-Pichon S, Tarze A, Bailleux V, Doucet J, Pelloux M, Delort F, Pizon V, Vicart P, Briki F. Cyclic stretch reveals a mechanical role for intermediate filaments in a desminopathic cell model. Phys Biol 2012; 10:016001. [PMID: 23234811 DOI: 10.1088/1478-3975/10/1/016001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Mechanics is now recognized as crucial in cell function. To date, the mechanical properties of cells have been inferred from experiments which investigate the roles of actin and microtubules ignoring the intermediate filaments (IFs) contribution. Here, we analyse myoblasts behaviour in the context of myofibrillar myopathy resulting from p.D399Y desmin mutation which disorganizes the desmin IF network in muscle cells. We compare the response of myoblasts expressing either mutated or wild-type desmin to cyclic stretch. Cells are cultivated on supports submitted to periodic uniaxial stretch of 20% elongation amplitude and 0.3 Hz frequency. We show that during stretching cycles, cells expressing mutated desmin reduce their mean amplitude both for the elongation and spreading area compared to those expressing wild-type desmin. Even more unexpected, the reorientation angles are altered in the presence of p.D399Y desmin. Yet, at rest, the whole set of those parameters are similar for the two cell populations. Thus, we demonstrate that IFs affect the mechanical properties and the dynamics of cell reorientation. Since these processes are known due to actin cytoskeleton, these results suggest the IFs implication in mechanics signal transduction. Further studies may lead to better understanding of their contribution to this process.
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Affiliation(s)
- E Leccia
- Université Paris Sud, Paris 11, Laboratoire de Physique des solides, Bat 510-91405 Orsay Cedex, France
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22
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Saini-Chohan HK, Mitchell RW, Vaz FM, Zelinski T, Hatch GM. Delineating the role of alterations in lipid metabolism to the pathogenesis of inherited skeletal and cardiac muscle disorders: Thematic Review Series: Genetics of Human Lipid Diseases. J Lipid Res 2011; 53:4-27. [PMID: 22065858 DOI: 10.1194/jlr.r012120] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
As the specific composition of lipids is essential for the maintenance of membrane integrity, enzyme function, ion channels, and membrane receptors, an alteration in lipid composition or metabolism may be one of the crucial changes occurring during skeletal and cardiac myopathies. Although the inheritance (autosomal dominant, autosomal recessive, and X-linked traits) and underlying/defining mutations causing these myopathies are known, the contribution of lipid homeostasis in the progression of these diseases needs to be established. The purpose of this review is to present the current knowledge relating to lipid changes in inherited skeletal muscle disorders, such as Duchenne/Becker muscular dystrophy, myotonic muscular dystrophy, limb-girdle myopathic dystrophies, desminopathies, rostrocaudal muscular dystrophy, and Dunnigan-type familial lipodystrophy. The lipid modifications in familial hypertrophic and dilated cardiomyopathies, as well as Barth syndrome and several other cardiac disorders associated with abnormal lipid storage, are discussed. Information on lipid alterations occurring in these myopathies will aid in the design of improved methods of screening and therapy in children and young adults with or without a family history of genetic diseases.
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Affiliation(s)
- Harjot K Saini-Chohan
- Department of Pharmacology and Therapeutics, Academic Medical Center, Amsterdam, The Netherlands
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23
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Joanne P, Chourbagi O, Agbulut O. [Desmin filaments and their disorganization associated with myofibrillar myopathies]. Biol Aujourdhui 2011; 205:163-77. [PMID: 21982405 DOI: 10.1051/jbio/2011016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Indexed: 11/14/2022]
Abstract
Desmin, the muscle-specific intermediate filament protein, is one of the earliest markers expressed in all muscle tissues during development. It forms a three-dimensional scaffold around the myofibril Z-disc and connects the entire contractile apparatus to the subsarcolemmal cytoskeleton, the nuclei and other cytoplasmic organelles. Desmin is essential for tensile strength and muscle integrity. In humans, disorganization of the desmin network is associated with cardiac and/or skeletal myopathies characterized by accumulation of desmin-containing aggregates in the cells. Currently, 49 mutations have been identified in desmin gene. The majority of these mutations alter desmin filament assembly process through different molecular mechanisms and also its interaction with its protein partners. Here, we will give an overview of desmin network organization as well as the impact of desmin mutations on this process. Furthermore, we will discuss the different molecular mechanisms implicated in perturbation of the desmin filament assembly process.
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Affiliation(s)
- Pierre Joanne
- Université Paris Diderot, Sorbonne Paris Cité, France
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24
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Favre B, Schneider Y, Lingasamy P, Bouameur JE, Begré N, Gontier Y, Steiner-Champliaud MF, Frias MA, Borradori L, Fontao L. Plectin interacts with the rod domain of type III intermediate filament proteins desmin and vimentin. Eur J Cell Biol 2011; 90:390-400. [PMID: 21296452 DOI: 10.1016/j.ejcb.2010.11.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Revised: 11/16/2010] [Accepted: 11/22/2010] [Indexed: 12/26/2022] Open
Abstract
Plectin is a versatile cytolinker protein critically involved in the organization of the cytoskeletal filamentous system. The muscle-specific intermediate filament (IF) protein desmin, which progressively replaces vimentin during differentiation of myoblasts, is one of the important binding partners of plectin in mature muscle. Defects of either plectin or desmin cause muscular dystrophies. By cell transfection studies, yeast two-hybrid, overlay and pull-down assays for binding analysis, we have characterized the functionally important sequences for the interaction of plectin with desmin and vimentin. The association of plectin with both desmin and vimentin predominantly depended on its fifth plakin repeat domain and downstream linker region. Conversely, the interaction of desmin and vimentin with plectin required sequences contained within the segments 1A-2A of their central coiled-coil rod domain. This study furthers our knowledge of the interaction between plectin and IF proteins important for maintenance of cytoarchitecture in skeletal muscle. Moreover, binding of plectin to the conserved rod domain of IF proteins could well explain its broad interaction with most types of IFs.
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Affiliation(s)
- Bertrand Favre
- Department of Dermatology, Inselspital, Bern University Hospital and University of Bern, 3010 Bern, Switzerland
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25
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Abstract
PURPOSE Genetic tests for the most commonly mutated genes in dilated cardiomyopathy (DCM) can confirm a clinical diagnosis in the proband and inform family management. Presymptomatic family members can be identified, allowing for targeted clinical monitoring to minimize adverse outcomes. However, the marked locus and allelic heterogeneity associated with DCM have made clinical genetic testing challenging. Novel sequencing platforms have now opened up avenues for more comprehensive diagnostic testing while simultaneously decreasing test cost and turn around time. METHODS By using a custom design based on triplicate resequencing and separate genotyping of known disease-causing variants, we developed the DCM CardioChip for efficient analysis of 19 genes previously implicated in causing DCM. RESULTS The chip's analytical sensitivity for known and novel substitution variants is 100% and 98%, respectively. In screening 73 previously tested DCM patients who did not carry clinically significant variants in 10 genes, 7 variants of likely clinical significance were identified in the remaining 9 genes included on the chip. Compared with traditional Sanger-based sequencing, test cost and turn around time were reduced by approximately 50%. CONCLUSIONS The DCM CardioChip is a highly efficient screening test with a projected clinical sensitivity of 26-29%.
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26
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van Spaendonck-Zwarts KY, van Hessem L, Jongbloed JDH, de Walle HEK, Capetanaki Y, van der Kooi AJ, van Langen IM, van den Berg MP, van Tintelen JP. Desmin-related myopathy. Clin Genet 2010; 80:354-66. [PMID: 20718792 DOI: 10.1111/j.1399-0004.2010.01512.x] [Citation(s) in RCA: 145] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Desmin-related myopathy (DRM) is an autosomally inherited skeletal and cardiac myopathy, mainly caused by dominant mutations in the desmin gene (DES). We provide (i) a literature review on DRM, including clinical manifestations, inheritance, molecular genetics, myopathology and management and (ii) a meta-analysis of reported DES mutation carriers, focusing on their clinical characteristics and potential genotype-phenotype correlations. Meta-analysis: DES mutation carriers (n = 159) with 40 different mutations were included. Neurological signs were present in 74% and cardiological signs in 74% of carriers (both neurological and cardiological signs in 49%, isolated neurological signs in 22%, and isolated cardiological signs in 22%). More than 70% of carriers exhibited myopathy or muscular weakness, with normal creatine kinase levels present in one third of them. Up to 50% of carriers had cardiomyopathy and around 60% had cardiac conduction disease or arrhythmias, with atrioventricular block as an important hallmark. Symptoms generally started during the 30s; a quarter of carriers died at a mean age of 49 years. Sudden cardiac death occurred in two patients with a pacemaker, suggesting a ventricular tachyarrhythmia as cause of death. The majority of DES mutations were missense mutations, mostly located in the 2B domain. Mutations in the 2B domain were predominant in patients with an isolated neurological phenotype, whereas head and tail domain mutations were predominant in patients with an isolated cardiological phenotype.
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Affiliation(s)
- K Y van Spaendonck-Zwarts
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
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27
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Desmin myopathy with severe cardiomyopathy in a Uruguayan family due to a codon deletion in a new location within the desmin 1A rod domain. Neuromuscul Disord 2010; 20:178-87. [DOI: 10.1016/j.nmd.2010.01.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Revised: 12/17/2009] [Accepted: 01/05/2010] [Indexed: 11/17/2022]
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28
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Herrmann H, Strelkov SV, Burkhard P, Aebi U. Intermediate filaments: primary determinants of cell architecture and plasticity. J Clin Invest 2009; 119:1772-83. [PMID: 19587452 DOI: 10.1172/jci38214] [Citation(s) in RCA: 225] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Intermediate filaments (IFs) are major constituents of the cytoskeleton and nuclear boundary in animal cells. They are of prime importance for the functional organization of structural elements. Depending on the cell type, morphologically similar but biochemically distinct proteins form highly viscoelastic filament networks with multiple nanomechanical functions. Besides their primary role in cell plasticity and their established function as cellular stress absorbers, recently discovered gene defects have elucidated that structural alterations of IFs can affect their involvement both in signaling and in controlling gene regulatory networks. Here, we highlight the basic structural and functional properties of IFs and derive a concept of how mutations may affect cellular architecture and thereby tissue construction and physiology.
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Affiliation(s)
- Harald Herrmann
- Group Functional Architecture of the Cell, German Cancer Research Center, Heidelberg, Germany.
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29
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Goldfarb LG, Dalakas MC. Tragedy in a heartbeat: malfunctioning desmin causes skeletal and cardiac muscle disease. J Clin Invest 2009; 119:1806-13. [PMID: 19587455 PMCID: PMC2701871 DOI: 10.1172/jci38027] [Citation(s) in RCA: 160] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Muscle fiber deterioration resulting in progressive skeletal muscle weakness, heart failure, and respiratory distress occurs in more than 20 inherited myopathies. As discussed in this Review, one of the newly identified myopathies is desminopathy, a disease caused by dysfunctional mutations in desmin, a type III intermediate filament protein, or alphaB-crystallin, a chaperone for desmin. The range of clinical manifestations in patients with desminopathy is wide and may overlap with those observed in individuals with other myopathies. Awareness of this disease needs to be heightened, diagnostic criteria reliably outlined, and molecular testing readily available; this would ensure prevention of sudden death from cardiac arrhythmias and other complications.
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Affiliation(s)
- Lev G. Goldfarb
- National Institute of Neurological Disorders and Stroke, NIH, Bethesda, Maryland, USA.
Imperial College London, Hammersmith Hospital Campus, London, United Kingdom
| | - Marinos C. Dalakas
- National Institute of Neurological Disorders and Stroke, NIH, Bethesda, Maryland, USA.
Imperial College London, Hammersmith Hospital Campus, London, United Kingdom
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30
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Davis J, Westfall MV, Townsend D, Blankinship M, Herron TJ, Guerrero-Serna G, Wang W, Devaney E, Metzger JM. Designing heart performance by gene transfer. Physiol Rev 2008; 88:1567-651. [PMID: 18923190 DOI: 10.1152/physrev.00039.2007] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The birth of molecular cardiology can be traced to the development and implementation of high-fidelity genetic approaches for manipulating the heart. Recombinant viral vector-based technology offers a highly effective approach to genetically engineer cardiac muscle in vitro and in vivo. This review highlights discoveries made in cardiac muscle physiology through the use of targeted viral-mediated genetic modification. Here the history of cardiac gene transfer technology and the strengths and limitations of viral and nonviral vectors for gene delivery are reviewed. A comprehensive account is given of the application of gene transfer technology for studying key cardiac muscle targets including Ca(2+) handling, the sarcomere, the cytoskeleton, and signaling molecules and their posttranslational modifications. The primary objective of this review is to provide a thorough analysis of gene transfer studies for understanding cardiac physiology in health and disease. By comparing results obtained from gene transfer with those obtained from transgenesis and biophysical and biochemical methodologies, this review provides a global view of cardiac structure-function with an eye towards future areas of research. The data presented here serve as a basis for discovery of new therapeutic targets for remediation of acquired and inherited cardiac diseases.
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Affiliation(s)
- Jennifer Davis
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, Minnesota 55455, USA
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31
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Fischer D, Kley RA, Strach K, Meyer C, Sommer T, Eger K, Rolfs A, Meyer W, Pou A, Pradas J, Heyer CM, Grossmann A, Huebner A, Kress W, Reimann J, Schröder R, Eymard B, Fardeau M, Udd B, Goldfarb L, Vorgerd M, Olivé M. Distinct muscle imaging patterns in myofibrillar myopathies. Neurology 2008; 71:758-65. [PMID: 18765652 DOI: 10.1212/01.wnl.0000324927.28817.9b] [Citation(s) in RCA: 167] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To compare muscle imaging findings in different subtypes of myofibrillar myopathies (MFM) in order to identify characteristic patterns of muscle alterations that may be helpful to separate these genetic heterogeneous muscular disorders. METHODS Muscle imaging and clinical findings of 46 patients with MFM were evaluated (19 desminopathy, 12 myotilinopathy, 11 filaminopathy, 1 alphaB-crystallinopathy, and 3 ZASPopathy). The data were collected retrospectively in 43 patients and prospectively in 3 patients. RESULTS In patients with desminopathy, the semitendinosus was at least equally affected as the biceps femoris, and the peroneal muscles were never less involved than the tibialis anterior (sensitivity of these imaging criteria to detect desminopathy in our cohort 100%, specificity 95%). In most of the patients with myotilinopathy, the adductor magnus showed more alterations than the gracilis muscle, and the sartorius was at least equally affected as the semitendinosus (sensitivity 90%, specificity 93%). In filaminopathy, the biceps femoris and semitendinosus were at least equally affected as the sartorius muscle, and the medial gastrocnemius was more affected than the lateral gastrocnemius. The semimembranosus mostly showed more alterations than the adductor magnus (sensitivity 88%, specificity 96%). Early adult onset and cardiac involvement was most often associated with desminopathy. In patients with filaminopathy, muscle weakness typically beginning in the 5th decade of life was mostly pronounced proximally, while late adult onset (>50 years) with distal weakness was more often present in myotilinopathy. CONCLUSIONS Muscle imaging in combination with clinical data may be helpful for separation of distinct myofibrillar myopathy subtypes and in scheduling of genetic analysis.
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Affiliation(s)
- D Fischer
- Department of Neurology, University Hospital Basel, Switzerland.
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Mavroidis M, Panagopoulou P, Kostavasili I, Weisleder N, Capetanaki Y. A missense mutation in desmin tail domain linked to human dilated cardiomyopathy promotes cleavage of the head domain and abolishes its Z-disc localization. FASEB J 2008; 22:3318-27. [PMID: 18539904 DOI: 10.1096/fj.07-088724] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A missense mutation (Ile 451 to Met) at the tail domain of the muscle-specific intermediate filament protein desmin has been suggested to be a genetic cause of dilated cardiomyopathy. The Ile451Met mutation is located inside a conserved motif in the desmin tail domain, believed to have a potential role in the lateral packing of type III intermediate filaments. Nevertheless, the role of the type III intermediate filament tail domain remains elusive. To further study the role of this domain in the function of cardiomyocytes and in the development of cardiomyopathy, we generated transgenic mice expressing the mutant desmin(I451M) in the cardiac tissue. Analysis of hearts from transgenic animals revealed that mutant desmin loses its Z-disc localization but it can still associate with the intercalated discs, which, however, have an altered architecture, resembling other examples of dilated cardiomyopathy. This is the first report demonstrating a critical role of the desmin head and tail domains in the formation of the IF scaffold around Z discs. It is further suggested that in cardiomyocytes, an interplay between desmin tail and head domains is taking place, which potentially protects the amino terminus of desmin from specific proteases. The fact that the association with intercalated discs seems unchanged suggests that this association must take place through the desmin tail, in contrast to the head domain that is most possibly involved in the Z-disc binding.
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Affiliation(s)
- Manolis Mavroidis
- Cell Biology Division, Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens, Greece
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33
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Strach K, Sommer T, Grohé C, Meyer C, Fischer D, Walter MC, Vorgerd M, Reilich P, Bär H, Reimann J, Reuner U, Germing A, Goebel HH, Lochmüller H, Wintersperger B, Schröder R. Clinical, genetic, and cardiac magnetic resonance imaging findings in primary desminopathies. Neuromuscul Disord 2008; 18:475-82. [PMID: 18504128 DOI: 10.1016/j.nmd.2008.03.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2007] [Revised: 03/08/2008] [Accepted: 03/16/2008] [Indexed: 01/25/2023]
Abstract
We report the clinical, genetic and cardiac magnetic resonance imaging (MRI) findings in 11 German patients with heterozygous E245D, D339Y, R350P and L377P desmin mutations and without cardiac symptoms. Clinical evaluation revealed a marked variability of skeletal muscle, respiratory and cardiac involvement even between patients with identical mutations, ranging from asymptomatic to severely affected. While echocardiography did not show any pathological findings in all 11 patients, cine MRI revealed focal left ventricular hypertrophy in 2 patients and MR delayed enhancement imaging displayed intramyocardial fibrosis in the left ventricle in 4 patients indicating early myocardial involvement. Our data argue against distinct genotype-phenotype correlations and suggest that comprehensive cardiac MRI is superior to conventional echocardiography for the detection of early and clinically asymptomatic stages of cardiomyopathy in desminopathy patients. Therefore, cardiac MRI may serve as a screening tool to identify patients at risk, which might benefit from early pharmacological and/or interventional (e.g. implantable cardioverter-defibrillator devices) therapy.
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Affiliation(s)
- Katharina Strach
- Department of Radiology, University Hospital Bonn, Sigmund-Freud-Str. 25, 53105 Bonn, Germany.
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34
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Goldfarb LG, Olivé M, Vicart P, Goebel HH. Intermediate filament diseases: desminopathy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2008; 642:131-64. [PMID: 19181099 PMCID: PMC2776705 DOI: 10.1007/978-0-387-84847-1_11] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Desminopathy is one of the most common intermediate filament human disorders associated with mutations in closely interacting proteins, desmin and alphaB-crystallin. The inheritance pattern in familial desminopathy is characterized as autosomal dominant or autosomal recessive, but many cases have no family history. At least some and likely most sporadic desminopathy cases are associated with de novo DES mutations. The age of disease onset and rate of progression may vary depending on the type of inheritance and location of the causative mutation. Typically, the illness presents with lower and later upper limb muscle weakness slowly spreading to involve truncal, neck-flexor, facial and bulbar muscles. Skeletal myopathy is often combined with cardiomyopathy manifested by conduction blocks, arrhythmias and chronic heart failure resulting in premature sudden death. Respiratory muscle weakness is a major complication in some patients. Sections of the affected skeletal and cardiac muscles show abnormal fibre areas containing chimeric aggregates consisting of desmin and other cytoskeletal proteins. Various DES gene mutations: point mutations, an insertion, small in-frame deletions and a larger exon-skipping deletion, have been identified in desminopathy patients. The majority of these mutations are located in conserved alpha-helical segments, but additional mutations have recently been identified in the tail domain. Filament and network assembly studies indicate that most but not all disease-causing mutations make desmin assembly-incompetent and able to disrupt a pre-existing filamentous network in dominant-negative fashion. AlphaB-crystallin serves as a chaperone for desmin preventing its aggregation under various forms of stress; mutant CRYAB causes cardiac and skeletal myopathies identical to those resulting from DES mutations.
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Affiliation(s)
- Lev G Goldfarb
- National Institutes of Health, Bethesda, MD 20892-9404, USA.
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35
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Abstract
Mutations of the human desmin gene on chromosome 2q35 cause a familial or sporadic form of skeletal myopathy frequently associated with cardiac abnormalities. Skeletal and cardiac muscle from patients with primary desminopathies characteristically display cytoplasmic accumulation of desmin-immunoreactive material and myofibrillar changes. However, desmin-positive protein aggregates in conjunction with myofibrillar abnormalities are also the morphological hallmark of the large group of secondary desminopathies (synonyms: myofibrillar myopathies, desmin-related myopathies), which comprise sporadic and familial neuromuscular conditions of considerable clinical and genetic heterogeneity. Here, we will give an overview on the functional role of desmin in striated muscle as well as the main clinical, myopathological, genetic and patho-physiological aspects of primary desminopathies. Furthermore, we will discuss recent genetic and biochemical advances in distinguishing primary from secondary desminopathies.
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Affiliation(s)
- Rolf Schröder
- Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany.
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36
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Olivé M, Armstrong J, Miralles F, Pou A, Fardeau M, Gonzalez L, Martínez F, Fischer D, Martínez Matos JA, Shatunov A, Goldfarb L, Ferrer I. Phenotypic patterns of desminopathy associated with three novel mutations in the desmin gene. Neuromuscul Disord 2007; 17:443-50. [PMID: 17418574 PMCID: PMC5127195 DOI: 10.1016/j.nmd.2007.02.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2006] [Revised: 02/09/2007] [Accepted: 02/15/2007] [Indexed: 10/23/2022]
Abstract
Desminopathy represents a subgroup of myofibrillar myopathies caused by mutations in the desmin gene. Three novel disease-associated mutations in the desmin gene were identified in unrelated Spanish families affected by cardioskeletal myopathy. A selective pattern of muscle involvement, which differed from that observed in myofibrillar myopathy resulting from mutations in the myotilin gene, was observed in each of the three families with novel mutations and each of three desminopathy patients with known desmin mutations. Prominent joint retractions at the ankles and characteristic nasal speech were observed early in the course of illness. These findings suggest that muscle imaging in combination with routine clinical and pathological examination may be helpful in distinguishing desminopathy from other forms of myofibrillar myopathy and ordering appropriate molecular investigations.
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Affiliation(s)
- Montse Olivé
- Institut de Neuropatologia, IDIBELL-Hospital de Bellvitge, Hospitalet de Llobregat, Barcelona, Spain.
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37
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Capetanaki Y, Bloch RJ, Kouloumenta A, Mavroidis M, Psarras S. Muscle intermediate filaments and their links to membranes and membranous organelles. Exp Cell Res 2007; 313:2063-76. [PMID: 17509566 DOI: 10.1016/j.yexcr.2007.03.033] [Citation(s) in RCA: 203] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2007] [Revised: 03/20/2007] [Accepted: 03/29/2007] [Indexed: 12/17/2022]
Abstract
Intermediate filaments (IFs) play a key role in the integration of structure and function of striated muscle, primarily by mediating mechanochemical links between the contractile apparatus and mitochondria, myonuclei, the sarcolemma and potentially the vesicle trafficking apparatus. Linkage of all these membranous structures to the contractile apparatus, mainly through the Z-disks, supports the integration and coordination of growth and energy demands of the working myocyte, not only with force transmission, but also with de novo gene expression, energy production and efficient protein and lipid trafficking and targeting. Desmin, the most abundant and intensively studied muscle intermediate filament protein, is linked to proper costamere organization, myoblast and stem cell fusion and differentiation, nuclear shape and positioning, as well as mitochondrial shape, structure, positioning and function. Similar links have been established for lysosomes and lysosome-related organelles, consistent with the presence of widespread links between IFs and membranous structures and the regulation of their fusion, morphology and stabilization necessary for cell survival.
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Affiliation(s)
- Yassemi Capetanaki
- Cell Biology Division, Center of Basic Research, Biomedical Research Foundation Academy of Athens, Soranou Efessiou 4, 12965 Athens, Greece.
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38
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Bär H, Goudeau B, Wälde S, Casteras-Simon M, Mücke N, Shatunov A, Goldberg YP, Clarke C, Holton JL, Eymard B, Katus HA, Fardeau M, Goldfarb L, Vicart P, Herrmann H. Conspicuous involvement of desmin tail mutations in diverse cardiac and skeletal myopathies. Hum Mutat 2007; 28:374-86. [PMID: 17221859 DOI: 10.1002/humu.20459] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Myofibrillar myopathy (MFM) encompasses a genetically heterogeneous group of human diseases caused by mutations in genes coding for structural proteins of muscle. Mutations in the intermediate filament (IF) protein desmin (DES), a major cytoskeletal component of myocytes, lead to severe forms of "desminopathy," which affects cardiac, skeletal, and smooth muscle. Most mutations described reside in the central alpha-helical rod domain of desmin. Here we report three novel mutations--c.1325C>T (p.T442I), c.1360C>T (p.R454W), and c.1379G>T (p.S460I)--located in desmin's non-alpha-helical carboxy-terminal "tail" domain. We have investigated the impact of these and four--c.1237G>A (p.E413K), c.1346A>C (p.K449T), c.1353C>G (p.I451M), and c.1405G>A (p.V469M)--previously described "tail" mutations on in vitro filament formation and on the generation of ordered cytoskeletal arrays in transfected myoblasts. Although all but two mutants (p.E413K, p.R454W) assembled into IFs in vitro and all except p.E413K were incorporated into IF arrays in transfected C2C12 cells, filament properties differed significantly from wild-type desmin as revealed by viscometric assembly assays. Most notably, when coassembled with wild-type desmin, these mutants revealed a severe disturbance of filament-formation competence and filament-filament interactions, indicating an inherent incompatibility of mutant and wild-type protein to form mixed filaments. The various clinical phenotypes observed may reflect altered interactions of desmin's tail domain with different components of the myoblast cytoskeleton leading to diminished biomechanical properties and/or altered metabolism of the individual myocyte. Our in vitro assembly regimen proved to be a very sensible tool to detect if a particular desmin mutation is able to cause filament abnormalities.
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Affiliation(s)
- Harald Bär
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
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