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Martínez Olorón P, Alegría I, Cesar S, del Olmo B, Martínez-Barrios E, Carrera-García L, Natera-de Benito D, Nascimento A, Campuzano O, Sarquella-Brugada G. Congenital LMNA-Related Muscular Dystrophy in Paediatrics: Cardiac Management in Monozygotic Twins. Int J Mol Sci 2024; 25:5836. [PMID: 38892025 PMCID: PMC11171958 DOI: 10.3390/ijms25115836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 05/22/2024] [Accepted: 05/24/2024] [Indexed: 06/21/2024] Open
Abstract
Pathogenic variants in LMNA have been associated with a wide spectrum of muscular conditions: the laminopathies. LMNA-related congenital muscular dystrophy is a laminopathy characterised by the early onset of symptoms and often leads to a fatal outcome at young ages. Children face a heightened risk of malignant arrhythmias. No established paediatric protocols for managing this condition are available. We review published cases and provide insights into disease progression in two twin sisters with LMNA-related muscular dystrophy. Our objective is to propose a cardiac surveillance and management plan tailored specifically for paediatric patients. We present a family of five members, including two twin sisters with LMNA-related muscular dystrophy. A comprehensive neuromuscular and cardiac work-up was performed in all family members. Genetic analysis using massive sequencing technology was performed in both twins. Clinical assessment showed that only the twins showed diagnoses of LMNA-related muscular dystrophy. Follow-up showed an early onset of symptoms and life-threatening arrhythmias, with differing disease progressions despite both twins passing away. Genetic analysis identified a de novo rare missense deleterious variant in the LMNA gene. Other additional rare variants were identified in genes associated with myasthenic syndrome. Early-onset neuromuscular symptoms could be related to a prognosis of worse life-threatening arrhythmias in LMNA related muscular dystrophy. Being a carrier of other rare variants may be a modifying factor in the progression of the phenotype, although further studies are needed. There is a pressing need for specific cardiac recommendations tailored to the paediatric population to mitigate the risk of malignant arrhythmias.
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Affiliation(s)
- Patricia Martínez Olorón
- Unidad de Cardiología Infantil, Hospital Universtario de Navarra, 31008 Pamplona, Spain;
- Departamento de Pediatría, Facultad de Ciencias de la Salud, Universidad Pública de Navarra, 31006 Pamplona, Spain
| | - Iosune Alegría
- Unidad de Cardiología Infantil, Hospital Universtario de Navarra, 31008 Pamplona, Spain;
| | - Sergi Cesar
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain; (S.C.); (E.M.-B.); (G.S.-B.)
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort Sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
| | - Bernat del Olmo
- Institut d’Investigació Biomèdiques de Girona (IDIBGI-CERCA), 17190 Salt, Spain; (B.d.O.); (O.C.)
- Centro Investigación Biomédica en Red-Cardiovascular (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Estefanía Martínez-Barrios
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain; (S.C.); (E.M.-B.); (G.S.-B.)
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort Sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
| | - Laura Carrera-García
- Neuromuscular Unit, Department of Neurology, Hospital Sant Joan de Déu, 08950 Barcelona, Spain; (L.C.-G.); (D.N.-d.B.); (A.N.)
- Investigación Aplicada en Enfermedades Neuromusculares Neurociències, Institut de Recerca Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
| | - Daniel Natera-de Benito
- Neuromuscular Unit, Department of Neurology, Hospital Sant Joan de Déu, 08950 Barcelona, Spain; (L.C.-G.); (D.N.-d.B.); (A.N.)
- Investigación Aplicada en Enfermedades Neuromusculares Neurociències, Institut de Recerca Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
- Instituto Nacional de Investigación Biomédica de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Andrés Nascimento
- Neuromuscular Unit, Department of Neurology, Hospital Sant Joan de Déu, 08950 Barcelona, Spain; (L.C.-G.); (D.N.-d.B.); (A.N.)
- Investigación Aplicada en Enfermedades Neuromusculares Neurociències, Institut de Recerca Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
- Instituto Nacional de Investigación Biomédica de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Oscar Campuzano
- Institut d’Investigació Biomèdiques de Girona (IDIBGI-CERCA), 17190 Salt, Spain; (B.d.O.); (O.C.)
- Centro Investigación Biomédica en Red-Cardiovascular (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Medical Science Department, School of Medicine, Universitat de Girona, 17003 Girona, Spain
| | - Georgia Sarquella-Brugada
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain; (S.C.); (E.M.-B.); (G.S.-B.)
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort Sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
- Institut d’Investigació Biomèdiques de Girona (IDIBGI-CERCA), 17190 Salt, Spain; (B.d.O.); (O.C.)
- Pediatrics Department, School of Medicine, Universitat de Barcelona, 08007 Barcelona, Spain
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2
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Gregory EF, Kalra S, Brock T, Bonne G, Luxton GWG, Hopkins C, Starr DA. Caenorhabditis elegans models for striated muscle disorders caused by missense variants of human LMNA. PLoS Genet 2023; 19:e1010895. [PMID: 37624850 PMCID: PMC10484454 DOI: 10.1371/journal.pgen.1010895] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 09/07/2023] [Accepted: 08/01/2023] [Indexed: 08/27/2023] Open
Abstract
Striated muscle laminopathies caused by missense mutations in the nuclear lamin gene LMNA are characterized by cardiac dysfunction and often skeletal muscle defects. Attempts to predict which LMNA variants are pathogenic and to understand their physiological effects lag behind variant discovery. We created Caenorhabditis elegans models for striated muscle laminopathies by introducing pathogenic human LMNA variants and variants of unknown significance at conserved residues within the lmn-1 gene. Severe missense variants reduced fertility and/or motility in C. elegans. Nuclear morphology defects were evident in the hypodermal nuclei of many lamin variant strains, indicating a loss of nuclear envelope integrity. Phenotypic severity varied within the two classes of missense mutations involved in striated muscle disease, but overall, variants associated with both skeletal and cardiac muscle defects in humans lead to more severe phenotypes in our model than variants predicted to disrupt cardiac function alone. We also identified a separation of function allele, lmn-1(R204W), that exhibited normal viability and swimming behavior but had a severe nuclear migration defect. Thus, we established C. elegans avatars for striated muscle laminopathies and identified LMNA variants that offer insight into lamin mechanisms during normal development.
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Affiliation(s)
- Ellen F. Gregory
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
| | - Shilpi Kalra
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
| | - Trisha Brock
- InVivo Biosystems, Eugene, Oregon, United States of America
| | - Gisèle Bonne
- Sorbonne Université, Inserm, Institut de Myologie, Centre de Recherche en Myologie, Paris, France
| | - G. W. Gant Luxton
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
| | | | - Daniel A. Starr
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
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Cesar S, Campuzano O, Cruzalegui J, Fiol V, Moll I, Martínez-Barrios E, Zschaeck I, Natera-de Benito D, Ortez C, Carrera L, Expósito J, Berrueco R, Bautista-Rodriguez C, Dabaj I, Gómez García-de-la-Banda M, Quijano-Roy S, Brugada J, Nascimento A, Sarquella-Brugada G. Characterization of cardiac involvement in children with LMNA-related muscular dystrophy. Front Cell Dev Biol 2023; 11:1142937. [PMID: 36968203 PMCID: PMC10036759 DOI: 10.3389/fcell.2023.1142937] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 02/27/2023] [Indexed: 03/12/2023] Open
Abstract
Introduction: LMNA-related muscular dystrophy is a rare entity that produce "laminopathies" such as Emery-Dreifuss muscular dystrophy (EDMD), limb-girdle muscular dystrophy type 1B (LGMD1B), and LMNA-related congenital muscular dystrophy (L-CMD). Heart failure, malignant arrhythmias, and sudden death may occur. No consensus exists on cardiovascular management in pediatric laminopathies. The aim was to perform an exhaustive cardiologic follow-up in pediatric patients diagnosed with LMNA-related muscular dystrophy. Methods: Baseline cardiac work-up consisted of clinical assessment, transthoracic Doppler echocardiography, 12-lead electrocardiogram, electrophysiological study, and implantation of a long-term implantable cardiac loop recorder (ILR). Results: We enrolled twenty-eight pediatric patients diagnosed with EDMD (13 patients), L-CMD (11 patients), LGMD1B (2 patients), and LMNA-related mild weakness (2 patients). Follow-up showed dilated cardiomyopathy (DCM) in six patients and malignant arrhythmias in five (four concomitant with DCM) detected by the ILR that required implantable cardioverter defibrillator (ICD) implantation. Malignant arrhythmias were detected in 20% of our cohort and early-onset EDMD showed worse cardiac prognosis. Discussion: Patients diagnosed with early-onset EDMD are at higher risk of DCM, while potentially life-threatening arrhythmias without DCM appear earlier in L-CMD patients. Early onset neurologic symptoms could be related with worse cardiac prognosis. Specific clinical guidelines for children are needed to prevent sudden death.
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Affiliation(s)
- Sergi Cesar
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
- European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart (ERN GUARD-Heart), Amsterdam, Netherlands
| | - Oscar Campuzano
- Medical Science Department, School of Medicine, Universitat de Girona, Girona, Spain
- Cardiovascular Genetics Center, University of Girona-IDIBGI, Girona, Spain
- Centro de Investigación Biomédica en Red, Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Jose Cruzalegui
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
- European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart (ERN GUARD-Heart), Amsterdam, Netherlands
| | - Victori Fiol
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
- European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart (ERN GUARD-Heart), Amsterdam, Netherlands
| | - Isaac Moll
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
- European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart (ERN GUARD-Heart), Amsterdam, Netherlands
| | - Estefania Martínez-Barrios
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
- European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart (ERN GUARD-Heart), Amsterdam, Netherlands
| | - Irene Zschaeck
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
- European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart (ERN GUARD-Heart), Amsterdam, Netherlands
- Neuromuscular Unit, Department of Neurology, Hospital Sant Joan de Déu, Barcelona, Spain
- Investigación Aplicada en Enfermedades Neuromusculares, Neurociències, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain
| | - Daniel Natera-de Benito
- Neuromuscular Unit, Department of Neurology, Hospital Sant Joan de Déu, Barcelona, Spain
- Investigación Aplicada en Enfermedades Neuromusculares, Neurociències, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain
| | - Carlos Ortez
- Neuromuscular Unit, Department of Neurology, Hospital Sant Joan de Déu, Barcelona, Spain
- Investigación Aplicada en Enfermedades Neuromusculares, Neurociències, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain
| | - Laura Carrera
- Neuromuscular Unit, Department of Neurology, Hospital Sant Joan de Déu, Barcelona, Spain
- Investigación Aplicada en Enfermedades Neuromusculares, Neurociències, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain
| | - Jessica Expósito
- Neuromuscular Unit, Department of Neurology, Hospital Sant Joan de Déu, Barcelona, Spain
- Investigación Aplicada en Enfermedades Neuromusculares, Neurociències, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain
| | - Rubén Berrueco
- Servicio de Hematología Pediátrica, Hospital Sant Joan de Déu Barcelona, Institut de Recerca Pediàtrica, Hospital Sant Joan de Déu de Barcelona (IRP-HSJD), Universitat de Barcelona, Barcelona, Spain
| | - Carles Bautista-Rodriguez
- Paediatric Cardiology Services, Royal Brompton Hospital, Guy’s and St Thomas NHS Foundation Trust, London, United Kingdom
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Ivana Dabaj
- Neuromuscular Unit, Pediatric Neurology and ICU Department, Raymond Poincaré Hospital (UVSQ), AP-HP Université Paris-Saclay, Garches, France
| | - Marta Gómez García-de-la-Banda
- Neuromuscular Unit, Pediatric Neurology and ICU Department, Raymond Poincaré Hospital (UVSQ), AP-HP Université Paris-Saclay, Garches, France
| | - Susana Quijano-Roy
- Neuromuscular Unit, Pediatric Neurology and ICU Department, Raymond Poincaré Hospital (UVSQ), AP-HP Université Paris-Saclay, Garches, France
| | - Josep Brugada
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
- European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart (ERN GUARD-Heart), Amsterdam, Netherlands
- Centro de Investigación Biomédica en Red, Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
- Arrhythmia Section, Cardiology Service, Hospital Clínic, Barcelona, Spain
| | - Andrés Nascimento
- Neuromuscular Unit, Department of Neurology, Hospital Sant Joan de Déu, Barcelona, Spain
- Investigación Aplicada en Enfermedades Neuromusculares, Neurociències, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain
- Instituto Nacional de Investigación Biomédica de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, España
| | - Georgia Sarquella-Brugada
- Pediatric Arrhythmias, Inherited Cardiac Diseases and Sudden Death Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
- Arrítmies Pediàtriques, Cardiologia Genètica i Mort sobtada, Malalties Cardiovasculars en el Desenvolupament, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
- European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart (ERN GUARD-Heart), Amsterdam, Netherlands
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Battey E, Ross JA, Hoang A, Wilson DGS, Han Y, Levy Y, Pollock RD, Kalakoutis M, Pugh JN, Close GL, Ellison-Hughes GM, Lazarus NR, Iskratsch T, Harridge SDR, Ochala J, Stroud MJ. Myonuclear alterations associated with exercise are independent of age in humans. J Physiol 2023. [PMID: 36597809 DOI: 10.1113/jp284128] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 12/19/2022] [Indexed: 01/05/2023] Open
Abstract
Age-related decline in skeletal muscle structure and function can be mitigated by regular exercise. However, the precise mechanisms that govern this are not fully understood. The nucleus plays an active role in translating forces into biochemical signals (mechanotransduction), with the nuclear lamina protein lamin A regulating nuclear shape, nuclear mechanics and ultimately gene expression. Defective lamin A expression causes muscle pathologies and premature ageing syndromes, but the roles of nuclear structure and function in physiological ageing and in exercise adaptations remain obscure. Here, we isolated single muscle fibres and carried out detailed morphological and functional analyses on myonuclei from young and older exercise-trained individuals. Strikingly, myonuclei from trained individuals were more spherical, less deformable, and contained a thicker nuclear lamina than those from untrained individuals. Complementary to this, exercise resulted in increased levels of lamin A and increased myonuclear stiffness in mice. We conclude that exercise is associated with myonuclear remodelling, independently of age, which may contribute to the preservative effects of exercise on muscle function throughout the lifespan. KEY POINTS: The nucleus plays an active role in translating forces into biochemical signals. Myonuclear aberrations in a group of muscular dystrophies called laminopathies suggest that the shape and mechanical properties of myonuclei are important for maintaining muscle function. Here, striking differences are presented in myonuclear shape and mechanics associated with exercise, in both young and old humans. Myonuclei from trained individuals were more spherical, less deformable and contained a thicker nuclear lamina than untrained individuals. It is concluded that exercise is associated with age-independent myonuclear remodelling, which may help to maintain muscle function throughout the lifespan.
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Affiliation(s)
- E Battey
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - J A Ross
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
| | - A Hoang
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
| | - D G S Wilson
- School of Engineering and Materials Science, Queen Mary University of London, London, UK
| | - Y Han
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Y Levy
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - R D Pollock
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - M Kalakoutis
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
- Randall Centre for Cell and Molecular Biophysics, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - J N Pugh
- School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - G L Close
- School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - G M Ellison-Hughes
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - N R Lazarus
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - T Iskratsch
- School of Engineering and Materials Science, Queen Mary University of London, London, UK
- Randall Centre for Cell and Molecular Biophysics, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - S D R Harridge
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - J Ochala
- Centre for Human & Applied Physiological Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - M J Stroud
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, King's College London, London, UK
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Genotype-Phenotype Correlations in Human Diseases Caused by Mutations of LINC Complex-Associated Genes: A Systematic Review and Meta-Summary. Cells 2022; 11:cells11244065. [PMID: 36552829 PMCID: PMC9777268 DOI: 10.3390/cells11244065] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Mutations in genes encoding proteins associated with the linker of nucleoskeleton and cytoskeleton (LINC) complex within the nuclear envelope cause different diseases with varying phenotypes including skeletal muscle, cardiac, metabolic, or nervous system pathologies. There is some understanding of the structure of LINC complex-associated proteins and how they interact, but it is unclear how mutations in genes encoding them can cause the same disease, and different diseases with different phenotypes. Here, published mutations in LINC complex-associated proteins were systematically reviewed and analyzed to ascertain whether patterns exist between the genetic sequence variants and clinical phenotypes. This revealed LMNA is the only LINC complex-associated gene in which mutations commonly cause distinct conditions, and there are no clear genotype-phenotype correlations. Clusters of LMNA variants causing striated muscle disease are located in exons 1 and 6, and metabolic disease-associated LMNA variants are frequently found in the tail of lamin A/C. Additionally, exon 6 of the emerin gene, EMD, may be a mutation "hot-spot", and diseases related to SYNE1, encoding nesprin-1, are most often caused by nonsense type mutations. These results provide insight into the diverse roles of LINC-complex proteins in human disease and provide direction for future gene-targeted therapy development.
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The N-Terminal Part of the 1A Domain of Desmin Is a Hot Spot Region for Putative Pathogenic DES Mutations Affecting Filament Assembly. Cells 2022; 11:cells11233906. [PMID: 36497166 PMCID: PMC9738904 DOI: 10.3390/cells11233906] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 11/29/2022] [Indexed: 12/09/2022] Open
Abstract
Desmin is the major intermediate filament protein of all three muscle cell types, and connects different cell organelles and multi-protein complexes such as the cardiac desmosomes. Several pathogenic mutations in the DES gene cause different skeletal and cardiac myopathies. However, the significance of the majority of DES missense variants is currently unknown, since functional data are lacking. To determine whether desmin missense mutations within the highly conserved 1A coil domain cause a filament assembly defect, we generated a set of variants with unknown significance and systematically analyzed the filament assembly using confocal microscopy in transfected SW-13, H9c2 cells and cardiomyocytes derived from induced pluripotent stem cells. We found that mutations in the N-terminal part of the 1A coil domain affect filament assembly, leading to cytoplasmic desmin aggregation. In contrast, mutant desmin in the C-terminal part of the 1A coil domain forms filamentous structures comparable to wild-type desmin. Our findings suggest that the N-terminal part of the 1A coil domain is a hot spot for pathogenic desmin mutations, which affect desmin filament assembly. This study may have relevance for the genetic counselling of patients carrying variants in the 1A coil domain of the DES gene.
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Tan D, Ge L, Fan Y, Wei C, Yang H, Liu A, Xiao J, Xiong H, Zhu Y. Muscle magnetic resonance imaging in patients with LAMA2-related muscular dystrophy. Neuromuscul Disord 2021; 31:1144-1153. [PMID: 34702656 DOI: 10.1016/j.nmd.2021.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 09/14/2021] [Accepted: 09/16/2021] [Indexed: 10/20/2022]
Abstract
LAMA2-related muscular dystrophy (LAMA2-MD) is classified into congenital muscular dystrophy type 1A (MDC1A) and autosomal recessive limb-girdle muscular dystrophy-23 (LGMDR23). The purpose of this study was to identify the involvement pattern of thigh muscles of LAMA2-MD patients on magnetic resonance imaging. Fourteen MDC1A and 3 LGMDR23 patients were included, with 21 known and 8 novel LAMA2 disease-causing variants. In LAMA2-MD, the gluteus maximus, anterior (quadriceps femoris) and posterior (adductor magnus and biceps femoris) thigh muscles were extensively and severely affected with fatty infiltration, with relatively sparing of the adductor longus. The pattern of muscle involvement was similar between MDC1A and LGMDR23, but more severe in MDC1A, as well as in LAMA2-MD patients without ambulation. The rather peculiar pattern of the adductor magnus and long head of the biceps femoris first and severely affected in the mid-thigh level was found in LGMDR23. Strong correlation between fatty infiltration and age as well as disease duration was observed for the adductor longus in MDC1A. Edema and atrophy selectively involved in some muscles. The pattern of fatty infiltration on thigh muscle MRI of LAMA2-MD could provide important information for the diagnosis, differential diagnosis and assessment of clinical severity.
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Affiliation(s)
- Dandan Tan
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing 100034, China
| | - Lin Ge
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing 100034, China
| | - Yanbin Fan
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing 100034, China
| | - Cuijie Wei
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing 100034, China
| | - Haipo Yang
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing 100034, China
| | - Aijie Liu
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing 100034, China
| | - Jiangxi Xiao
- Department of Radiology, Peking University First Hospital, No.8 Xishiku Street, West District, Beijing 100034, China
| | - Hui Xiong
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing 100034, China.
| | - Ying Zhu
- Department of Radiology, Peking University First Hospital, No.8 Xishiku Street, West District, Beijing 100034, China.
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8
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Myocardial and Arrhythmic Spectrum of Neuromuscular Disorders in Children. Biomolecules 2021; 11:biom11111578. [PMID: 34827576 PMCID: PMC8615674 DOI: 10.3390/biom11111578] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/02/2021] [Accepted: 10/14/2021] [Indexed: 12/30/2022] Open
Abstract
Neuromuscular disorders (NMDs) are highly heterogenous from both an etiological and clinical point of view. Their signs and symptoms are often multisystemic, with frequent cardiac involvement. In fact, childhood onset forms can predispose a person to various progressive cardiac abnormalities including cardiomyopathies (CMPs), valvulopathies, atrioventricular conduction defects (AVCD), supraventricular tachycardia (SVT) and ventricular arrhythmias (VA). In this review, we selected and described five specific NMDs: Friedreich’s Ataxia (FRDA), congenital and childhood forms of Myotonic Dystrophy type 1 (DM1), Kearns Sayre Syndrome (KSS), Ryanodine receptor type 1-related myopathies (RYR1-RM) and Laminopathies. These changes are widely investigated in adults but less researched in children. We focused on these specific topics due their relative frequency and their potential unexpected cardiac manifestations in children. Moreover these conditions present different inheritance patterns and mechanisms of action. We decided not to discuss Duchenne and Becker muscular dystrophies due to extensive work regarding the cardiac aspects in children. For each described NMD, we focused on the possible cardiac manifestations such as different types of CMPs (dilated-DCM, hypertrophic-HCM, restrictive-RCM or left ventricular non compaction-LVNC), structural heart abnormalities (including valvulopathies), and progressive heart rhythm changes (AVCD, SVT, VA). We describe the current management strategies for these conditions. We underline the importance, especially for children, of a serial multidisciplinary personalized approach and the need for periodic surveillance by a dedicated heart team. This is largely due to the fact that in children, the diagnosis of certain NMDs might be overlooked and the cardiac aspect can provide signs of their presence even prior to overt neurological diagnosis.
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9
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Hinz BE, Walker SG, Xiong A, Gogal RA, Schnieders MJ, Wallrath LL. In Silico and In Vivo Analysis of Amino Acid Substitutions That Cause Laminopathies. Int J Mol Sci 2021; 22:ijms222011226. [PMID: 34681887 PMCID: PMC8536974 DOI: 10.3390/ijms222011226] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/07/2021] [Accepted: 10/11/2021] [Indexed: 01/08/2023] Open
Abstract
Mutations in the LMNA gene cause diseases called laminopathies. LMNA encodes lamins A and C, intermediate filaments with multiple roles at the nuclear envelope. LMNA mutations are frequently single base changes that cause diverse disease phenotypes affecting muscles, nerves, and fat. Disease-associated amino acid substitutions were mapped in silico onto three-dimensional structures of lamin A/C, revealing no apparent genotype–phenotype connections. In silico analyses revealed that seven of nine predicted partner protein binding pockets in the Ig-like fold domain correspond to sites of disease-associated amino acid substitutions. Different amino acid substitutions at the same position within lamin A/C cause distinct diseases, raising the question of whether the nature of the amino acid replacement or genetic background differences contribute to disease phenotypes. Substitutions at R249 in the rod domain cause muscular dystrophies with varying severity. To address this variability, we modeled R249Q and R249W in Drosophila Lamin C, an orthologue of LMNA. Larval body wall muscles expressing mutant Lamin C caused abnormal nuclear morphology and premature death. When expressed in indirect flight muscles, R249W caused a greater number of adults with wing posturing defects than R249Q, consistent with observations that R249W and R249Q cause distinct muscular dystrophies, with R249W more severe. In this case, the nature of the amino acid replacement appears to dictate muscle disease severity. Together, our findings illustrate the utility of Drosophila for predicting muscle disease severity and pathogenicity of variants of unknown significance.
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Affiliation(s)
- Benjamin E. Hinz
- Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA; (B.E.H.); (S.G.W.); (A.X.); (M.J.S.)
| | - Sydney G. Walker
- Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA; (B.E.H.); (S.G.W.); (A.X.); (M.J.S.)
| | - Austin Xiong
- Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA; (B.E.H.); (S.G.W.); (A.X.); (M.J.S.)
| | - Rose A. Gogal
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA;
| | - Michael J. Schnieders
- Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA; (B.E.H.); (S.G.W.); (A.X.); (M.J.S.)
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA;
| | - Lori L. Wallrath
- Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA; (B.E.H.); (S.G.W.); (A.X.); (M.J.S.)
- Correspondence: ; Tel.: +1-319-335-7920
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10
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Ben Yaou R, Yun P, Dabaj I, Norato G, Donkervoort S, Xiong H, Nascimento A, Maggi L, Sarkozy A, Monges S, Bertoli M, Komaki H, Mayer M, Mercuri E, Zanoteli E, Castiglioni C, Marini-Bettolo C, D'Amico A, Deconinck N, Desguerre I, Erazo-Torricelli R, Gurgel-Giannetti J, Ishiyama A, Kleinsteuber KS, Lagrue E, Laugel V, Mercier S, Messina S, Politano L, Ryan MM, Sabouraud P, Schara U, Siciliano G, Vercelli L, Voit T, Yoon G, Alvarez R, Muntoni F, Pierson TM, Gómez-Andrés D, Reghan Foley A, Quijano-Roy S, Bönnemann CG, Bonne G. International retrospective natural history study of LMNA-related congenital muscular dystrophy. Brain Commun 2021; 3:fcab075. [PMID: 34240052 PMCID: PMC8260964 DOI: 10.1093/braincomms/fcab075] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 12/23/2020] [Accepted: 02/02/2021] [Indexed: 12/12/2022] Open
Abstract
Muscular dystrophies due to heterozygous pathogenic variants in LMNA gene cover a broad spectrum of clinical presentations and severity with an age of onset ranging from the neonatal period to adulthood. The natural history of these conditions is not well defined, particularly in patients with congenital or early onset who arguably present with the highest disease burden. Thus the definition of natural history endpoints along with clinically revelant outcome measures is essential to establishing both clinical care planning and clinical trial readiness for this patient group. We designed a large international cross-sectional retrospective natural history study of patients with genetically proven muscle laminopathy who presented with symptoms before two years of age intending to identify and characterize an optimal clinical trial cohort with pertinent motor, cardiac and respiratory endpoints. Quantitative statistics were used to evaluate associations between LMNA variants and distinct clinical events. The study included 151 patients (median age at symptom onset 0.9 years, range: 0.0–2.0). Age of onset and age of death were significantly lower in patients who never acquired independent ambulation compared to patients who achieved independent ambulation. Most of the patients acquired independent ambulation (n = 101, 66.9%), and subsequently lost this ability (n = 86; 85%). The age of ambulation acquisition (median: 1.2 years, range: 0.8–4.0) and age of ambulation loss (median: 7 years, range: 1.2–38.0) were significantly associated with the age of the first respiratory interventions and the first cardiac symptoms. Respiratory and gastrointestinal interventions occurred during first decade while cardiac interventions occurred later. Genotype–phenotype analysis showed that the most common mutation, p.Arg249Trp (20%), was significantly associated with a more severe disease course. This retrospective natural history study of early onset LMNA-related muscular dystrophy confirms the progressive nature of the disorder, initially involving motor symptoms prior to onset of other symptoms (respiratory, orthopaedic, cardiac and gastrointestinal). The study also identifies subgroups of patients with a range of long-term outcomes. Ambulatory status was an important mean of stratification along with the presence or absence of the p.Arg249Trp mutation. These categorizations will be important for future clinical trial cohorts. Finally, this study furthers our understanding of the progression of early onset LMNA-related muscular dystrophy and provides important insights into the anticipatory care needs of LMNA-related respiratory and cardiac manifestations.
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Affiliation(s)
- Rabah Ben Yaou
- Sorbonne Université, Inserm, Institut de Myologie, Centre de Recherche en Myologie, F-75013 Paris, France.,APHP-Sorbonne Université, Neuromuscular Disorders Reference Center of Nord-Est-Île de France, FILNEMUS, ERN-Euro-NMD, Service de Neuromyologie, Institute de Myologie, G.H. Pitié-Salpêtrière Paris F-75013, France
| | - Pomi Yun
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Ivana Dabaj
- APHP-Université Paris-Saclay, Neuromuscular Disorders Reference Center of Nord-Est-Île de France, FILNEMUS, ERN-Euro-NMD, Pediatric Neurology and ICU Department, DMU Santé Enfant Adolescent (SEA), Raymond Poincaré University Hospital, Garches France.,INSERM U 1245, ED497, School of Medicine, Rouen University, Rouen, France
| | - Gina Norato
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Sandra Donkervoort
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Hui Xiong
- INSERM U 1245, ED497, School of Medicine, Rouen University, Rouen, France
| | - Andrés Nascimento
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Lorenzo Maggi
- Neuromuscular Unit, Neuropaediatrics Department, Hospital Sant Joan de Déu, Institut de Recerca Sant Joan de Déu, CIBERER - ISC III, Barcelona, Spain
| | - Anna Sarkozy
- Neuroimmunology and Neuromuscular Diseases Unit, Fondazione IRCCS Instituto Neurologico Carlo Besta, Milano, Italy.,Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, London, UK
| | - Soledad Monges
- Servicio de Neurología, Hospital de Pediatría J.P. Garrahan, Buenos Aires, Argentina
| | - Marta Bertoli
- Northern Genetics Service, The Newcastle upon Tyne NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Hirofumi Komaki
- Department of Child Neurology, National Center Hospital, National Center of Neurology and Psychiatry (NCNP), Tokyo, Japan
| | - Michèle Mayer
- APHP-Sorbonne Université, Neuromuscular Disorders Reference Center of Nord-Est-Île de France, FILNEMUS, ERN-Euro-NMD, Department of Neuropediatrics, Hôpital Armand Trousseau, Paris, France
| | - Eugenio Mercuri
- Paediatric Neurology, Policlinico Gemelli, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Edmar Zanoteli
- Department of Neurology, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | | | - Chiara Marini-Bettolo
- John Walton Muscular Dystrophy Research Centre, Institute of Integrated Laboratory Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle Upon Tyne, UK
| | - Adele D'Amico
- Unit of Muscular and Neurodegenerative diseases, Department of Neurological and Psychiatric science,s Bambino Gesù Children's Hospital, Rome, Italy
| | - Nicolas Deconinck
- Paediatric Neurology Department and neuromuscular Center, Hôpital Universitaire des Enfants Reine Fabiola, Université Libre de Bruxelles, Brussels, Belgium
| | - Isabelle Desguerre
- APHP-Centre - Université de Paris, Neuromuscular Disorders Reference Center of Nord-Est-Île de France, FILNEMUS, ERN-Euro-NMD, Necker-Enfants Malades Hospital, Paris, France
| | - Ricardo Erazo-Torricelli
- Neurología Pediátrica, Unidad Neuromuscular, Hospital Luis Calvo Mackenna, Clínica Alemana de Santiago, Santiago, Chile
| | - Juliana Gurgel-Giannetti
- Department of Pediatrics, Pediatric Neurology Service, Medical School, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Akihiko Ishiyama
- Department of Child Neurology, National Center Hospital, National Center of Neurology and Psychiatry (NCNP), Tokyo, Japan
| | - Karin S Kleinsteuber
- Neurología Pediátrica Hospital Roberto del Río- Universidad de Chile - Clínica Las Condes Santiago, Chile
| | - Emmanuelle Lagrue
- CHRU de Tours, Université François Rabelais de Tours, INSERM U1253, Tours, France
| | - Vincent Laugel
- Department of neuropediatrics, CHU Strasbourg- Hautepierre, Strasbourg, France
| | - Sandra Mercier
- Service de Génétique médicale, INSERM, CNRS, UNIV Nantes, CHU Nantes, l'institut du Thorax, Nantes, France
| | - Sonia Messina
- Unit of Neurology, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Luisa Politano
- Cardiomiology and Medical Genetics, Department of Experimental Medicine, University of Campania, Naples, Italy
| | - Monique M Ryan
- Children's Neurosciences Centre, Royal Children's Hospital, Victoria, Australia
| | - Pascal Sabouraud
- Service de Pédiatrie A, Neurologie pédiatrique, CHU de Reims, American Memorial Hospital, Reims, France
| | - Ulrike Schara
- Department of Neuropediatrics, Developmental Neurology and Social Pediatrics, Children's Hospital 1, University of Duisburg-Essen, Essen, Germany
| | - Gabriele Siciliano
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Liliana Vercelli
- Department of Neuroscience, Center for Neuromuscular Diseases, University of Turin, Turin, Italy
| | - Thomas Voit
- Neuroimmunology and Neuromuscular Diseases Unit, Fondazione IRCCS Instituto Neurologico Carlo Besta, Milano, Italy.,National Institute for Health Research Great Ormond Street Hospital Biomedical Research Centre, University College London Great Ormond Street Institute of Child Health, London, UK
| | - Grace Yoon
- Divisions of Neurology and Clinical and Metabolic Genetics, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Rachel Alvarez
- Congenital Muscle Disease International Registry (CMDIR), Cure CMD, Lakewood, CA, USA
| | - Francesco Muntoni
- Neuroimmunology and Neuromuscular Diseases Unit, Fondazione IRCCS Instituto Neurologico Carlo Besta, Milano, Italy.,National Institute for Health Research Great Ormond Street Hospital Biomedical Research Centre, University College London Great Ormond Street Institute of Child Health, London, UK
| | - Tyler M Pierson
- Departments of Pediatrics and Neurology and the Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - David Gómez-Andrés
- Pediatric Neurology (ERN-RND - EURO-NMD), Vall d'Hebron Institut de Recerca (VHIR), Hospital Universitari Vall d'Hebron, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - A Reghan Foley
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Susana Quijano-Roy
- APHP-Université Paris-Saclay, Neuromuscular Disorders Reference Center of Nord-Est-Île de France, FILNEMUS, ERN-Euro-NMD, Pediatric Neurology and ICU Department, DMU Santé Enfant Adolescent (SEA), Raymond Poincaré University Hospital, Garches France.,INSERM U 1179, University of Versailles Saint-Quentin-en-Yvelines (UVSQ), France
| | - Carsten G Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Gisèle Bonne
- Sorbonne Université, Inserm, Institut de Myologie, Centre de Recherche en Myologie, F-75013 Paris, France.,APHP-Sorbonne Université, Neuromuscular Disorders Reference Center of Nord-Est-Île de France, FILNEMUS France, ERN-Euro-NMD, Paris, France
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11
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Fan Y, Tan D, Zhang X, Song D, Chang X, Wang S, Yan H, Ge L, Yang H, Bönnemann C, Liu J, Wang S, Wu X, Zhang H, Xiong H. Nuclear Factor-κB Pathway Mediates the Molecular Pathogenesis of LMNA-Related Muscular Dystrophies. Biochem Genet 2020; 58:966-980. [PMID: 32705401 DOI: 10.1007/s10528-020-09989-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 07/10/2020] [Indexed: 11/26/2022]
Abstract
LMNA-related muscular dystrophies are caused by mutations of the LMNA gene. Inflammatory changes and cellular apoptosis are significant pathological findings in the muscle cells of these patients. We aimed to investigate the roles of nuclear factor-κB (NF-κB) mediated inflammation as a molecular mechanism for the pathogenesis of LMNA-related muscular dystrophies. Muscle specimen of a patient with LMNA gene mutation (c.1117A>G, p.I373V, reported in our previous work) showed significant inflammatory changes. The ultrastructure of muscle cells showed severe nuclear abnormalities compared with the control. Therefore, we used this mutation to establish mutant cell line for in vitro studies. Transfected human embryonic kidney 293 (HEK293) cells containing a mutant construct from this patient showed irregular nuclear morphology. Mass spectrometry analysis suggested genomic instability and augmented expression of apoptosis-related genes. We detected activation of NF-κB pathway in LMNA mutant cells which promoted the expression of downstream inflammatory factors. The LMNA mutation also activated the molecular pathway of apoptosis in LMNA mutant cells. These are important molecular mechanisms underlying the pathogenesis of LMNA-related muscular dystrophies. Our research provides crucial evidence for future pathogenetic studies and possible treatment strategies for LMNA-related muscular dystrophies.
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Affiliation(s)
- Yanbin Fan
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China
| | - Dandan Tan
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China
- Department of Neurology, Jiujiang University Clinical Medical College, Jiujiang University Hospital, Jiujiang, Jiangxi, 332000, People's Republic of China
| | - Xu Zhang
- Center of Ultrastructural Pathology, Lab of Electron Microscopy, Peking University First Hospital, Beijing, 100034, People's Republic of China
| | - Danyu Song
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China
| | - Xingzhi Chang
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China
| | - Shuang Wang
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China
| | - Hui Yan
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China
| | - Lin Ge
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China
| | - Haipo Yang
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China
| | - Carsten Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Jingying Liu
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Peking University Health Science Center, No.38 Xueyuan Road, Haidian District, Beijing, 100191, People's Republic of China
| | - Suxia Wang
- Center of Ultrastructural Pathology, Lab of Electron Microscopy, Peking University First Hospital, Beijing, 100034, People's Republic of China
| | - Xiru Wu
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China
| | - Hong Zhang
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Peking University Health Science Center, No.38 Xueyuan Road, Haidian District, Beijing, 100191, People's Republic of China.
| | - Hui Xiong
- Department of Pediatrics, Peking University First Hospital, No.1 Xi'an Men Street, West District, Beijing, 100034, People's Republic of China.
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12
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Fan Y, Tan D, Song D, Zhang X, Chang X, Wang Z, Zhang C, Chan SHS, Wu Q, Wu L, Wang S, Yan H, Ge L, Yang H, Mao B, Bönnemann C, Liu J, Wang S, Yuan Y, Wu X, Zhang H, Xiong H. Clinical spectrum and genetic variations of LMNA-related muscular dystrophies in a large cohort of Chinese patients. J Med Genet 2020; 58:326-333. [PMID: 32571898 PMCID: PMC8086255 DOI: 10.1136/jmedgenet-2019-106671] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 04/11/2020] [Accepted: 05/02/2020] [Indexed: 12/13/2022]
Abstract
Background LMNA-related muscular dystrophy is caused by mutations in LMNA gene. We aimed to identify genetic variations and clinical features in a large cohort of Chinese patients with LMNA mutations in an attempt to establish genotype-phenotype correlation. Methods The clinical presentations of patients with LMNA-related muscular dystrophy were recorded using retrospective and prospective cohort study. LMNA mutation analysis was performed by Sanger sequencing or next-generation sequencing. Mosaicism was detected by personal genome machine amplicon deep sequencing for mosaicism. Results Eighty-four patients were identified to harbour LMNA mutations. Forty-one of those were diagnosed with LMNA-related congenital muscular dystrophy (L-CMD), 32 with Emery-Dreifuss muscular dystrophy (EDMD) and 11 with limb-girdle muscular dystrophy type 1B (LGMD1B). We identified 21 novel and 29 known LMNA mutations. Two frequent mutations were identified: c.745C>T and c.1357C>T. A correlation between the location of mutation and the clinical phenotype was observed: mutations affecting the head and coil 2A domains mainly occurred in L-CMD, while the coil 2B and Ig-like domains mainly related to EDMD and LGMD1B. We found somatic mosaicism in one parent of four probands. Muscle biopsies revealed 11 of 20 biopsied L-CMD exhibited inflammatory changes, and muscle cell ultrastructure showed abnormal nuclear morphology. Conclusions Our detailed clinical and genetic analysis of 84 patients with LMNA-related muscular dystrophy expands clinical spectrum and broadens genetic variations caused by LMNA mutations. We identified 21 novel and 29 known LMNA mutations and found two frequent mutations. A correlation between the location of mutation and the clinical severity was observed. Preliminary data suggested that low-dose corticosteroid treatment may be effective.
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Affiliation(s)
- Yanbin Fan
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Dandan Tan
- Department of Pediatrics, Peking University First Hospital, Beijing, China.,Department of Neurology, Jiujiang University Clinical Medical College, Jiujiang University Hospital, Jiujiang, Jiangxi, China
| | - Danyu Song
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Xu Zhang
- Center of Ultrastructural Pathology, Lab of Electron Microscopy, Peking University First Hospital, Beijing, China
| | - Xingzhi Chang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Zhaoxia Wang
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Cheng Zhang
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Sophelia Hoi-Shan Chan
- Department of Pediatrics & Adolescent Medicine, The University of Hong Kong Queen Mary Hospital, Hong Kong, China
| | - Qixi Wu
- School of Life Sciences, Peking University, Beijing, China
| | - Liwen Wu
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shuang Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Hui Yan
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Lin Ge
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Haipo Yang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Bing Mao
- Department of Neurology, Wuhan Children's Hospital, Wuhan, Hubei, China
| | - Carsten Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, Bethesda, Maryland, USA
| | - Jingying Liu
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Peking University Health Science Centre, Beijing, China
| | - Suxia Wang
- Center of Ultrastructural Pathology, Lab of Electron Microscopy, Peking University First Hospital, Beijing, China
| | - Yun Yuan
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Xiru Wu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Hong Zhang
- Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences, Peking University Health Science Centre, Beijing, China
| | - Hui Xiong
- Department of Pediatrics, Peking University First Hospital, Beijing, China
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13
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Earle AJ, Kirby TJ, Fedorchak GR, Isermann P, Patel J, Iruvanti S, Moore SA, Bonne G, Wallrath LL, Lammerding J. Mutant lamins cause nuclear envelope rupture and DNA damage in skeletal muscle cells. NATURE MATERIALS 2020; 19:464-473. [PMID: 31844279 PMCID: PMC7102937 DOI: 10.1038/s41563-019-0563-5] [Citation(s) in RCA: 135] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 11/12/2019] [Indexed: 05/19/2023]
Abstract
Mutations in the LMNA gene, which encodes the nuclear envelope (NE) proteins lamins A/C, cause Emery-Dreifuss muscular dystrophy, congenital muscular dystrophy and other diseases collectively known as laminopathies. The mechanisms responsible for these diseases remain incompletely understood. Using three mouse models of muscle laminopathies and muscle biopsies from individuals with LMNA-related muscular dystrophy, we found that Lmna mutations reduced nuclear stability and caused transient rupture of the NE in skeletal muscle cells, resulting in DNA damage, DNA damage response activation and reduced cell viability. NE and DNA damage resulted from nuclear migration during skeletal muscle maturation and correlated with disease severity in the mouse models. Reduction of cytoskeletal forces on the myonuclei prevented NE damage and rescued myofibre function and viability in Lmna mutant myofibres, indicating that myofibre dysfunction is the result of mechanically induced NE damage. Taken together, these findings implicate mechanically induced DNA damage as a pathogenic contributor to LMNA skeletal muscle diseases.
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Affiliation(s)
- Ashley J Earle
- Meinig School of Biomedical Engineering & Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY, USA
| | - Tyler J Kirby
- Meinig School of Biomedical Engineering & Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY, USA
| | - Gregory R Fedorchak
- Meinig School of Biomedical Engineering & Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY, USA
| | - Philipp Isermann
- Meinig School of Biomedical Engineering & Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY, USA
| | - Jineet Patel
- Meinig School of Biomedical Engineering & Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY, USA
| | - Sushruta Iruvanti
- Meinig School of Biomedical Engineering & Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY, USA
| | - Steven A Moore
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Gisèle Bonne
- Sorbonne Université, Inserm UMRS 974, Center of Research in Myology, Association Institute of Myology, Paris, France
| | - Lori L Wallrath
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Jan Lammerding
- Meinig School of Biomedical Engineering & Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY, USA.
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14
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Xiong H. Novel candidate alleles associated with gene regulation for Emery-Dreifuss muscular dystrophy. EBioMedicine 2020; 52:102620. [PMID: 31981977 PMCID: PMC6992946 DOI: 10.1016/j.ebiom.2019.102620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 12/19/2019] [Indexed: 12/31/2022] Open
Affiliation(s)
- Hui Xiong
- Department of Pediatrics, Peking University First Hospital, 1, Xi anmen St., West District, Beijing, China.
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15
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Baban A, Cicenia M, Magliozzi M, Gnazzo M, Cantarutti N, Silvetti MS, Adorisio R, Dallapiccola B, Bertini E, Novelli A, Drago F. Cardiovascular Involvement in Pediatric Laminopathies. Report of Six Patients and Literature Revision. Front Pediatr 2020; 8:374. [PMID: 32793522 PMCID: PMC7393225 DOI: 10.3389/fped.2020.00374] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/02/2020] [Indexed: 12/30/2022] Open
Abstract
Lamin A/C (LMNA) encodes for two nuclear intermediate filament proteins. Mutations in LMNA cause a highly heterogeneous group of diseases predominantly leading to muscular or cardiac disease, lipodystrophy syndromes, peripheral neuropathy, and accelerated aging disorders. Cardiac involvement includes progressive arrhythmias (brady/tachyarrhythmias, sudden cardiac death). Furthermore, cardiomyocyte damage often progresses into dilated cardiomyopathy (DCM), rarely described in the pediatric age group. Neuromuscular manifestations are even rarer in children. We report on six pediatric patients with LMNA mutations: patient 1 was operated on for aortic coarctation, non-compact left ventricle, atrial fibrillation (AF) preceding the diagnosis of DCM; patient 2 was operated on for ventricular septal defect (VSD), developed after years malignant arrhythmias preceding the progression to DCM (left ventricular non-compaction with LV dysfunction); patient 3 had ectopic atrial tachycardia as first manifestation of a DCM; patients 4 and 5 had no major arrhythmic events but only dilated ascending aorta, mildly dilated LV with mild hypertrabeculation of the lateral wall and a normally functioning but dilated left ventricle, respectively; patient 6 showed aortic coarctation, supraventricular tachycardia. Paroxysmal AF occurred in patients 1, 2, and 3 (50% of cases). Our series highlight the coexistence of congenital heart defects (CHDs) and aortic involvement with laminopathies in four of our patients: consisting of aortic coarctation (two patients), aortic root dilatation (one patient), and VSD (one patient). Aortic changes in laminopathies have been reported only once in an adult patient. This is the first report in the pediatric setting, and no associations with CHD have been previously described.
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Affiliation(s)
- Anwar Baban
- The European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Pediatric Cardiology and Arrhythmia/Syncope Units, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Marianna Cicenia
- The European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Pediatric Cardiology and Arrhythmia/Syncope Units, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Monia Magliozzi
- Laboratory of Medical Genetics, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Maria Gnazzo
- Laboratory of Medical Genetics, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Nicoletta Cantarutti
- The European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Pediatric Cardiology and Arrhythmia/Syncope Units, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Massimo Stefano Silvetti
- The European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Pediatric Cardiology and Arrhythmia/Syncope Units, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Rachele Adorisio
- The European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Pediatric Cardiology and Arrhythmia/Syncope Units, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Bruno Dallapiccola
- The European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Pediatric Cardiology and Arrhythmia/Syncope Units, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Enrico Bertini
- The European Reference Network for Neuromuscular Disorders (ERN NMD), Unit of Neuromuscular and Neurodegenerative Disorders, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Antonio Novelli
- Laboratory of Medical Genetics, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
| | - Fabrizio Drago
- The European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Pediatric Cardiology and Arrhythmia/Syncope Units, Bambino Gesù Children Hospital and Research Institute, Rome, Italy
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16
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Choi SA, Cho A, Kim SY, Kim WJ, Shim YK, Lee JS, Jang SS, Lim BC, Kim H, Hwang H, Choi JE, Kim KJ, Kim MJ, Seong MW, Chae JH. Importance of early diagnosis in LMNA-related muscular dystrophy for cardiac surveillance. Muscle Nerve 2019; 60:668-672. [PMID: 31498906 DOI: 10.1002/mus.26700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 09/03/2019] [Accepted: 09/03/2019] [Indexed: 11/05/2022]
Abstract
INTRODUCTION The identification of LMNA-related muscular dystrophy is important because it poses life-threatening cardiac complications. However, diagnosis of LMNA-related muscular dystrophy based on clinical features is challenging. METHODS We reviewed the clinical phenotypes of 14 children with LMNA variants, focusing on the cardiac function and genotypes. RESULTS Most patients presented with motor developmental delay or gait abnormalities. Eight (57%) patients had prominent neck extensor weakness or contractures. All patients showed ankle contractures at an early stage. Regular cardiac surveillance allowed for the detection of dysrhythmias in 57% of patients at a mean age of 14 years (range, 5-26). All patients had missense variants; however, there were no clear phenotype-genotype correlations. DISCUSSION Early diagnosis of LMNA-related muscular dystrophy provides an opportunity for cardiac surveillance, potentially leading to the prevention of cardiac mortality in children.
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Affiliation(s)
- Sun Ah Choi
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea.,Department of Pediatrics, Dankook University Hospital, Cheonan, Korea
| | - Anna Cho
- Department of Pediatrics, Ewha Womans University College of Medicine, Seoul, Korea
| | - Soo Yeon Kim
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Woo Joong Kim
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Young Kyu Shim
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Jin Sook Lee
- Department of Pediatrics, Gachon University Gil Medical Center, Incheon, Korea
| | - Se Song Jang
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Byung Chan Lim
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Hunmin Kim
- Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Hee Hwang
- Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Ji Eun Choi
- Department of Pediatrics, Seoul National University Boramae Medical Center, Seoul, Korea
| | - Ki Joong Kim
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Man Jin Kim
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Moon-Woo Seong
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Jong-Hee Chae
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
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17
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Ge L, Zhang C, Wang Z, Chan SHS, Zhu W, Han C, Zhang X, Zheng H, Wu L, Jin B, Shan J, Mao B, Zhong J, Peng X, Cheng Y, Hu J, Sun Y, Lu J, Hua Y, Zhu S, Wei C, Wang S, Jiao H, Yang H, Fu X, Fan Y, Chang X, Wang S, Bao X, Zhang Y, Wang J, Wu Y, Jiang Y, Yuan Y, Rutkowski A, Bönnemann CG, Wei W, Wu X, Xiong H. Congenital muscular dystrophies in China. Clin Genet 2019; 96:207-215. [PMID: 31066047 DOI: 10.1111/cge.13560] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 03/26/2019] [Accepted: 03/29/2019] [Indexed: 12/21/2022]
Abstract
Congenital muscular dystrophies (CMDs) are clinically and genetically heterogeneous conditions. We launched a nationwide study to determine the frequency of CMD in the Chinese population and assess the status of diagnosis and disease management for CMD in China. Cases were chosen from databases in 34 tertiary academic hospitals from 29 first-level administrative divisions (provinces, municipalities, autonomous regions, and special administrative regions), and medical records were reviewed to confirm the diagnoses. The study included 409 patients, of those patients who consented to genetic testing (n = 340), mutations were identified in 286 of them. The most common forms identified were LAMA2-related CMD (36.4%), followed by COL6-related CMD (23.2%) and α-dystroglycanopathy (21.0%). The forms of CMD related to mutations in LMNA and SEPN1 were less frequent (12.5% and 2.4%, respectively). We also recorded a significant difference in the diagnostic capabilities and disease management of CMD, with this being relatively backward in research centers from less developed regions. We provide, for the first time, comprehensive epidemiologic information of CMD in a large cohort of Chinese people. To our knowledge, this is the largest sample size of its kind so far highlighting the prevalence of CMD in China.
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Affiliation(s)
- Lin Ge
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Cheng Zhang
- Department of Neurology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zhaoxia Wang
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Sophelia H S Chan
- Department of Pediatrics & Adolescent Medicine, The University of Hong Kong Queen Mary Hospital, Hong Kong, China
| | - Wenhua Zhu
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Chunxi Han
- Department of Neurology, Shenzhen Children's Hospital, Shenzhen, China
| | - Xiaoli Zhang
- Department of Pediatrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hong Zheng
- Department of Pediatrics, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, China
| | - Liwen Wu
- Department of Pediatrics, Xiangya Hospital of Central South University, Changsha, China
| | - Bo Jin
- Department of Neurology, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Jingli Shan
- Department of Neurology, Qilu Hospital, Shandong University, Jinan, China
| | - Bing Mao
- Department of Neurology, Wuhan Children's Hospital, Wuhan, China
| | - Jianmin Zhong
- Department of Pediatric Neurology, Jiangxi Provincial Children's Hospital, Nanchang, China
| | - Xiaoyin Peng
- Department of Neurology, Capital Institute of Pediatrics Children's Hospital, Beijing, China
| | - Yaying Cheng
- Department of Pediatrics, Hebei General Hospital, Shijiazhuang, China
| | - Jun Hu
- Department of Pediatrics, Fujian Medical University Union Hospital, Fuzhou, China
| | - Yan Sun
- Department of Pediatrics, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Junlan Lu
- Department of Neurology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Ying Hua
- Department of Neurology, Wuxi Children's Hospital, Wuxi, China
| | - Sainan Zhu
- Department of Biostatistics, Peking University First Hospital, Beijing, China
| | - Cuijie Wei
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Shuo Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Hui Jiao
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Haipo Yang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Xiaona Fu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yanbin Fan
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Xingzhi Chang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Shuang Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Xinhua Bao
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yuehua Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Jingmin Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Ye Wu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yuwu Jiang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yun Yuan
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Anne Rutkowski
- Kaiser Permanente SCPMG Cure CMD, Los Angeles, California
| | - Carsten G Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland
| | - Wei Wei
- Beijing Kangso Medical Inspection Co., LTD, Beijing, China
| | - Xiru Wu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Hui Xiong
- Department of Pediatrics, Peking University First Hospital, Beijing, China
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18
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Steele-Stallard HB, Pinton L, Sarcar S, Ozdemir T, Maffioletti SM, Zammit PS, Tedesco FS. Modeling Skeletal Muscle Laminopathies Using Human Induced Pluripotent Stem Cells Carrying Pathogenic LMNA Mutations. Front Physiol 2018; 9:1332. [PMID: 30405424 PMCID: PMC6201196 DOI: 10.3389/fphys.2018.01332] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 09/04/2018] [Indexed: 01/03/2023] Open
Abstract
Laminopathies are a clinically heterogeneous group of disorders caused by mutations in LMNA. The main proteins encoded by LMNA are Lamin A and C, which together with Lamin B1 and B2, form the nuclear lamina: a mesh-like structure located underneath the inner nuclear membrane. Laminopathies show striking tissue specificity, with subtypes affecting striated muscle, peripheral nerve, and adipose tissue, while others cause multisystem disease with accelerated aging. Although several pathogenic mechanisms have been proposed, the exact pathophysiology of laminopathies remains unclear, compounded by the rarity of these disorders and lack of easily accessible cell types to study. To overcome this limitation, we used induced pluripotent stem cells (iPSCs) from patients with skeletal muscle laminopathies such as LMNA-related congenital muscular dystrophy and limb-girdle muscular dystrophy 1B, to model disease phenotypes in vitro. iPSCs can be derived from readily accessible cell types, have unlimited proliferation potential and can be differentiated into cell types that would otherwise be difficult and invasive to obtain. iPSC lines from three skeletal muscle laminopathy patients were differentiated into inducible myogenic cells and myotubes. Disease-associated phenotypes were observed in these cells, including abnormal nuclear shape and mislocalization of nuclear lamina proteins. Nuclear abnormalities were less pronounced in monolayer cultures of terminally differentiated skeletal myotubes than in proliferating myogenic cells. Notably, skeletal myogenic differentiation of LMNA-mutant iPSCs in artificial muscle constructs improved detection of myonuclear abnormalities compared to conventional monolayer cultures across multiple pathogenic genotypes, providing a high-fidelity modeling platform for skeletal muscle laminopathies. Our results lay the foundation for future iPSC-based therapy development and screening platforms for skeletal muscle laminopathies.
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Affiliation(s)
- Heather B Steele-Stallard
- Department of Cell and Developmental Biology, University College London, London, United Kingdom.,Randall Centre for Cell and Molecular Biophysics, King's College London, London, United Kingdom
| | - Luca Pinton
- Department of Cell and Developmental Biology, University College London, London, United Kingdom.,Randall Centre for Cell and Molecular Biophysics, King's College London, London, United Kingdom
| | - Shilpita Sarcar
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
| | - Tanel Ozdemir
- Department of Cell and Developmental Biology, University College London, London, United Kingdom.,Randall Centre for Cell and Molecular Biophysics, King's College London, London, United Kingdom
| | - Sara M Maffioletti
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
| | - Peter S Zammit
- Randall Centre for Cell and Molecular Biophysics, King's College London, London, United Kingdom
| | - Francesco Saverio Tedesco
- Department of Cell and Developmental Biology, University College London, London, United Kingdom.,The Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
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19
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Lin HT, Liu X, Zhang W, Liu J, Zuo YH, Xiao JX, Zhu Y, Yuan Y, Wang ZX. Muscle Magnetic Resonance Imaging in Patients with Various Clinical Subtypes of LMNA-Related Muscular Dystrophy. Chin Med J (Engl) 2018; 131:1472-1479. [PMID: 29893365 PMCID: PMC6006825 DOI: 10.4103/0366-6999.233957] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Background: LMNA-related muscular dystrophy can manifest in a wide variety of disorders, including Emery-Dreifuss muscular dystrophy (EDMD), limb-girdle muscular dystrophy (LGMD), and LMNA-associated congenital muscular dystrophy (L-CMD). Muscle magnetic resonance imaging (MRI) has become a useful tool in the diagnostic workup of patients with muscle dystrophies. This study aimed to investigate whether there is a consistent pattern of MRI changes in patients with LMNA mutations in various muscle subtypes. Methods: Twenty-two patients with LMNA-related muscular dystrophies were enrolled in this study. MRI of the thigh and/or calf muscles was performed in them. The muscle MRI features of the three subtypes were compared by the Mann-Whitney U-test. The relationship between the clinical and MRI findings was also investigated by Spearman's rank analyses. Results: The present study included five EDMD, nine LGMD, and eight L-CMD patients. The thigh muscle MRI revealed that the fatty infiltration of the adductor magnus, semimembranosus, long and short heads of the biceps femoris, and vasti muscles, with relative sparing of the rectus femoris, was the predominant change observed in the EDMD, LGMD, and advanced-stage L-CMD phenotypes, although the involvement of the vasti muscles was not prominent in the early stage of L-CMD. At the level of the calf, six patients (one EDMD, four LGMD, and one L-CMD) also showed a similar pattern, in which the soleus and the medial and lateral gastrocnemius muscles were most frequently observed to have fatty infiltration. The fatty infiltration severity demonstrated higher scores associated with disease progression, with a corresponding rate of 1.483 + 0.075 × disease duration (X) (r = 0.444, P = 0.026). It was noteworthy that in six L-CMD patients with massive inflammatory cell infiltration in muscle pathology, no remarkable edema-like signals were observed in muscle MRI. Conclusions: EDMD, LGMD and advanced-staged L-CMD subtypes showed similar pattern of muscle MRI changes, while early-staged L-CMD showed somewhat different changes. Muscle MRI of L-CMD with a muscular dystrophy pattern in MRI provided important clues for differentiating it from childhood inflammatory myopathy. The fatty infiltration score could be used as a reliable biomarker for outcome measure of disease progression.
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Affiliation(s)
- Hui-Ting Lin
- Department of Neurology, Peking University First Hospital, Beijing 100034, China
| | - Xiao Liu
- Department of Neurology, Peking University First Hospital, Beijing 100034, China
| | - Wei Zhang
- Department of Neurology, Peking University First Hospital, Beijing 100034, China
| | - Jing Liu
- Department of Neurology, Peking University First Hospital, Beijing 100034, China
| | - Yue-Huan Zuo
- Department of Neurology, Peking University First Hospital, Beijing 100034, China
| | - Jiang-Xi Xiao
- Department of Radiology, Peking University First Hospital, Beijing 100034, China
| | - Ying Zhu
- Department of Radiology, Peking University First Hospital, Beijing 100034, China
| | - Yun Yuan
- Department of Neurology, Peking University First Hospital, Beijing 100034, China
| | - Zhao-Xia Wang
- Department of Neurology, Peking University First Hospital, Beijing 100034, China
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20
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A novel LMNA mutation identified in a Japanese patient with LMNA-associated congenital muscular dystrophy. Hum Genome Var 2018; 5:19. [PMID: 30083363 PMCID: PMC6054619 DOI: 10.1038/s41439-018-0018-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/30/2018] [Accepted: 06/04/2018] [Indexed: 02/02/2023] Open
Abstract
LMNA-associated congenital muscular dystrophy (L-CMD) is a severe form of muscle laminopathy. LMNA encodes lamin A, which an intermediate filament protein that attaches to the inner membrane of the nuclear envelope. We performed sequence analysis based on our original targeted gene panel system for muscle diseases to obtain a molecular diagnosis in a Japanese girl with L-CMD. A novel heterozygous missense mutation, c.115A>C (p.Asn39His), in LMNA is reported.
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21
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Gargiuli C, Schena E, Mattioli E, Columbaro M, D'Apice MR, Novelli G, Greggi T, Lattanzi G. Lamins and bone disorders: current understanding and perspectives. Oncotarget 2018; 9:22817-22831. [PMID: 29854317 PMCID: PMC5978267 DOI: 10.18632/oncotarget.25071] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 03/22/2018] [Indexed: 12/31/2022] Open
Abstract
Lamin A/C is a major constituent of the nuclear lamina implicated in a number of genetic diseases, collectively known as laminopathies. The most severe forms of laminopathies feature, among other symptoms, congenital scoliosis, osteoporosis, osteolysis or delayed cranial ossification. Importantly, specific bone districts are typically affected in laminopathies. Spine is severely affected in LMNA-linked congenital muscular dystrophy. Mandible, terminal phalanges and clavicles undergo osteolytic processes in progeroid laminopathies and Restrictive Dermopathy, a lethal developmental laminopathy. This specificity suggests that lamin A/C regulates fine mechanisms of bone turnover, as supported by data showing that lamin A/C mutations activate non-canonical pathways of osteoclastogenesis, as the one dependent on TGF beta 2. Here, we review current knowledge on laminopathies affecting bone and LMNA involvement in bone turnover and highlight lamin-dependent mechanisms causing bone disorders. This knowledge can be exploited to identify new therapeutic approaches not only for laminopathies, but also for other rare diseases featuring bone abnormalities.
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Affiliation(s)
- Chiara Gargiuli
- CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy
| | - Elisa Schena
- CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy.,Rizzoli Orthopaedic Institute, Laboratory of Cell Biology, Bologna, Italy
| | - Elisabetta Mattioli
- CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy.,Rizzoli Orthopaedic Institute, Laboratory of Cell Biology, Bologna, Italy
| | - Marta Columbaro
- Rizzoli Orthopaedic Institute, Laboratory of Cell Biology, Bologna, Italy
| | | | - Giuseppe Novelli
- Medical Genetics Unit, Policlinico Tor Vergata University Hospital, Rome, Italy
| | - Tiziana Greggi
- Rizzoli Orthopaedic Institute, Spine Deformity Department, Bologna, Italy
| | - Giovanna Lattanzi
- CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy.,Rizzoli Orthopaedic Institute, Laboratory of Cell Biology, Bologna, Italy
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22
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Karaoglu P, Quizon N, Pergande M, Wang H, Polat AI, Ersen A, Özer E, Willkomm L, Hiz Kurul S, Heredia R, Yis U, Selcen D, Çirak S. Dropped head congenital muscular dystrophy caused by de novo mutations in LMNA. Brain Dev 2017; 39:361-364. [PMID: 27876398 DOI: 10.1016/j.braindev.2016.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 10/23/2016] [Accepted: 11/03/2016] [Indexed: 12/22/2022]
Abstract
BACKGROUND Dropped head syndrome is an easily recognizable clinical presentation of Lamin A/C-related congenital muscular dystrophy. Patients usually present in the first year of life with profound neck muscle weakness, dropped head, and elevated serum creatine kinase. CASE DESCRIPTION Two patients exhibited head drop during infancy although they were able to sit independently. Later they developed progressive axial and limb-girdle weakness. Creatine kinase levels were elevated and muscle biopsies of both patients showed severe dystrophic changes. The distinctive clinical hallmark of the dropped head led us to the diagnosis of Lamin A/C-related congenital muscular dystrophy, with a pathogenic de novo mutation p.Glu31del in the head domain of the Lamin A/C gene in both patients. Remarkably, one patient also had a central involvement with white matter changes on brain magnetic resonance imaging. CONCLUSION Lamin A/C-related dropped-head syndrome is a rapidly progressive congenital muscular dystrophy and may lead to loss of ambulation, respiratory insufficiency, and cardiac complications. Thus, the genetic diagnosis of dropped-head syndrome as L-CMD and the implicated clinical care protocols are of vital importance for these patients. This disease may be underdiagnosed, as only a few genetically confirmed cases have been reported.
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Affiliation(s)
- Pakize Karaoglu
- Dokuz Eylül University, School of Medicine, Department of Pediatrics, Division of Child Neurology, 35340 İzmir, Turkey
| | - Nicolas Quizon
- Children's National Medical Center, Research Center for Genetic Medicine, 20010 Washington DC, USA
| | - Matthias Pergande
- University Children's Hospital Cologne, 50931 Cologne, Germany; Center for Molecular Medicine, 50931 Cologne, Germany
| | - Haicui Wang
- University Children's Hospital Cologne, 50931 Cologne, Germany; Center for Molecular Medicine, 50931 Cologne, Germany
| | - Ayşe Ipek Polat
- Dokuz Eylül University, School of Medicine, Department of Pediatrics, Division of Child Neurology, 35340 İzmir, Turkey
| | - Ayca Ersen
- Dokuz Eylül University, School of Medicine, Department of Pathology, 35340 İzmir, Turkey
| | - Erdener Özer
- Dokuz Eylül University, School of Medicine, Department of Pathology, 35340 İzmir, Turkey
| | - Lena Willkomm
- Center for Molecular Medicine, 50931 Cologne, Germany
| | - Semra Hiz Kurul
- Dokuz Eylül University, School of Medicine, Department of Pediatrics, Division of Child Neurology, 35340 İzmir, Turkey
| | - Raúl Heredia
- Children's National Medical Center, Research Center for Genetic Medicine, 20010 Washington DC, USA
| | - Uluç Yis
- Dokuz Eylül University, School of Medicine, Department of Pediatrics, Division of Child Neurology, 35340 İzmir, Turkey
| | - Duygu Selcen
- Mayo Clinic, Department of Neurology, Rochester, MN, USA
| | - Sebahattin Çirak
- Children's National Medical Center, Research Center for Genetic Medicine, 20010 Washington DC, USA; University Children's Hospital Cologne, 50931 Cologne, Germany; Center for Molecular Medicine, 50931 Cologne, Germany.
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23
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A Novel Lamin A Mutant Responsible for Congenital Muscular Dystrophy Causes Distinct Abnormalities of the Cell Nucleus. PLoS One 2017; 12:e0169189. [PMID: 28125586 PMCID: PMC5268432 DOI: 10.1371/journal.pone.0169189] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 12/13/2016] [Indexed: 11/26/2022] Open
Abstract
A-type lamins, the intermediate filament proteins participating in nuclear structure and function, are encoded by LMNA. LMNA mutations can lead to laminopathies such as lipodystrophies, premature aging syndromes (progeria) and muscular dystrophies. Here, we identified a novel heterozygous LMNA p.R388P de novo mutation in a patient with a non-previously described severe phenotype comprising congenital muscular dystrophy (L-CMD) and lipodystrophy. In culture, the patient’s skin fibroblasts entered prematurely into senescence, and some nuclei showed a lamina honeycomb pattern. C2C12 myoblasts were transfected with a construct carrying the patient’s mutation; R388P-lamin A (LA) predominantly accumulated within the nucleoplasm and was depleted at the nuclear periphery, altering the anchorage of the inner nuclear membrane protein emerin and the nucleoplasmic protein LAP2-alpha. The mutant LA triggered a frequent and severe nuclear dysmorphy that occurred independently of prelamin A processing, as well as increased histone H3K9 acetylation. Nuclear dysmorphy was not significantly improved when transfected cells were treated with drugs disrupting microtubules or actin filaments or modifying the global histone acetylation pattern. Therefore, releasing any force exerted at the nuclear envelope by the cytoskeleton or chromatin did not rescue nuclear shape, in contrast to what was previously shown in Hutchinson-Gilford progeria due to other LMNA mutations. Our results point to the specific cytotoxic effect of the R388P-lamin A mutant, which is clinically related to a rare and severe multisystemic laminopathy phenotype.
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The sensitivity of exome sequencing in identifying pathogenic mutations for LGMD in the United States. J Hum Genet 2016; 62:243-252. [PMID: 27708273 PMCID: PMC5266644 DOI: 10.1038/jhg.2016.116] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 08/31/2016] [Accepted: 09/02/2016] [Indexed: 01/12/2023]
Abstract
The current study characterizes a cohort of limb-girdle muscular dystrophy (LGMD) in the United States using whole exome sequencing. Fifty-five families affected by LGMD were recruited using an institutionally-approved protocol. Exome sequencing was performed on probands and selected parental samples. Pathogenic mutations and co-segregation patterns were confirmed by Sanger sequencing. Twenty-two families (40%) had novel and previously reported pathogenic mutations, primarily in LGMD genes, but also in genes for Duchenne muscular dystrophy, facioscapulohumeral muscular dystrophy, congenital myopathy, myofibrillar myopathy, inclusion body myopathy, and Pompe disease. One family was diagnosed via clinical testing. Dominant mutations were identified in COL6A1, COL6A3, FLNC, LMNA, RYR1, SMCHD1, and VCP, recessive mutations in ANO5, CAPN3, GAA, LAMA2, SGCA, and SGCG, and X-linked mutations in DMD. A previously reported variant in DMD was confirmed to be benign. Exome sequencing is a powerful diagnostic tool for LGMD. Despite careful phenotypic screening, pathogenic mutations were found in other muscle disease genes, largely accounting for the increased sensitivity of exome sequencing. Our experience suggests that broad sequencing panels are useful for these analyses due to the phenotypic overlap of many neuromuscular conditions. The confirmation of a benign DMD variant illustrates the potential of exome sequencing to help determine pathogenicity.
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The effect of the lamin A and its mutants on nuclear structure, cell proliferation, protein stability, and mobility in embryonic cells. Chromosoma 2016; 126:501-517. [PMID: 27534416 PMCID: PMC5509783 DOI: 10.1007/s00412-016-0610-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 07/11/2016] [Accepted: 08/02/2016] [Indexed: 01/26/2023]
Abstract
LMNA gene encodes for nuclear intermediate filament proteins lamin A/C. Mutations in this gene lead to a spectrum of genetic disorders, collectively referred to as laminopathies. Lamin A/C are widely expressed in most differentiated somatic cells but not in early embryos and some undifferentiated cells. To investigate the role of lamin A/C in cell phenotype maintenance and differentiation, which could be a determinant of the pathogenesis of laminopathies, we examined the role played by exogenous lamin A and its mutants in differentiated cell lines (HeLa, NHDF) and less-differentiated HEK 293 cells. We introduced exogenous wild-type and mutated (H222P, L263P, E358K D446V, and ∆50) lamin A into different cell types and analyzed proteins’ impact on proliferation, protein mobility, and endogenous nuclear envelope protein distribution. The mutants give rise to a broad spectrum of nuclear phenotypes and relocate lamin C. The mutations ∆50 and D446V enhance proliferation in comparison to wild-type lamin A and control cells, but no changes in exogenous protein mobility measured by FRAP were observed. Interestingly, although transcripts for lamins A and C are at similar level in HEK 293 cells, only lamin C protein is detected in western blots. Also, exogenous lamin A and its mutants, when expressed in HEK 293 cells underwent posttranscriptional processing. Overall, our results provide new insight into the maintenance of lamin A in less-differentiated cells. Embryonic cells are very sensitive to lamin A imbalance, and its upregulation disturbs lamin C, which may influence gene expression and many regulatory pathways.
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Cattin ME, Ferry A, Vignaud A, Mougenot N, Jacquet A, Wahbi K, Bertrand AT, Bonne G. Mutation in lamin A/C sensitizes the myocardium to exercise-induced mechanical stress but has no effect on skeletal muscles in mouse. Neuromuscul Disord 2016; 26:490-9. [DOI: 10.1016/j.nmd.2016.05.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Accepted: 05/18/2016] [Indexed: 12/11/2022]
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Massalska D, Zimowski JG, Bijok J, Kucińska-Chahwan A, Łusakowska A, Jakiel G, Roszkowski T. Prenatal diagnosis of congenital myopathies and muscular dystrophies. Clin Genet 2016; 90:199-210. [PMID: 27197572 DOI: 10.1111/cge.12801] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 05/05/2016] [Accepted: 05/08/2016] [Indexed: 12/14/2022]
Abstract
Congenital myopathies and muscular dystrophies constitute a genetically and phenotypically heterogeneous group of rare inherited diseases characterized by muscle weakness and atrophy, motor delay and respiratory insufficiency. To date, curative care is not available for these diseases, which may severely affect both life-span and quality of life. We discuss prenatal diagnosis and genetic counseling for families at risk, as well as diagnostic possibilities in sporadic cases.
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Affiliation(s)
- D Massalska
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - J G Zimowski
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - J Bijok
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - A Kucińska-Chahwan
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - A Łusakowska
- Department of Neurology, Medical University of Warsaw, Poland
| | - G Jakiel
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - T Roszkowski
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
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