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Lehtokari V, Similä M, Tammepuu M, Hiekkala S, Strang-Karlsson S, Wallgren-Pettersson C. CONGENITAL MYOPATHIES – NEMALINE MYOPATHIES. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Sagath L, Lehtokari V, Wallgren-Pettersson C, Pelin K, Kiiski K. CONGENITAL MYOPATHIES – NEMALINE MYOPATHIES. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lehtokari V, Tammepuu M, Similä M, Strang-Karlsson S, Hiekkala S, Wallgren-Pettersson C. CONGENITAL MYOPATHIES 1 – NEMALINE. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Laitila J, Hanif M, Sarparanta J, Lehtonen J, Khattab A, Grönholm M, Wallgren-Pettersson C, Pelin K. MUSCLE FUNCTION & HOMEOSTASIS / MOLECULAR THERAPEUTIC APPROACHES. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lehtonen J, Johari M, Almusa H, Lehesjoki A, Wartiovaara K, Saarela J, Hackman P, Wallgren-Pettersson C, Udd B, Lehtokari V, Pelin K, Savarese M. OMICs AND AI APPROACHES FOR MUSCLE DISEASES. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sagath L, Laitila J, Lehtokari V, Kiiski K, Grönholm M, Wallgren-Pettersson C, Pelin K. P.165Update on functional studies of YBX3 variants associated with nemaline myopathy. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lehtokari V, Sagath L, Kiiski K, Wallgren-Pettersson C, Pelin K. P.160The spectrum of disease-causing and normal variation in the nebulin gene. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lehtonen J, Sofieva S, Laitila J, Wallgren-Pettersson C, Grönholm M, Pelin K, Lehtokari V. CONGENITAL MYOPATHIES: NEMALINE AND TITINOPATHIES. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
Congenital myopathies are clinically and genetically a heterogeneous group of early onset neuromuscular disorders, characterized by hypotonia and muscle weakness. Clinical severity and age of onset are variable. Many patients are severely affected at birth while others have a milder, moderately progressive or nonprogressive phenotype. Respiratory weakness is a major clinical aspect that requires regular monitoring. Causative mutations in several genes have been identified that are inherited in a dominant, recessive or X-linked manner, or arise de novo. Muscle biopsies show characteristic pathological features such as nemaline rods/bodies, cores, central nuclei or caps. Small type 1 fibres expressing slow myosin are a common feature and may sometimes be the only abnormality. Small cores (minicores) devoid of mitochondria and areas showing variable myofibrillar disruption occur in several neuromuscular disorders including several forms of congenital myopathy. Muscle biopsies can also show more than one structural defect. There is considerable clinical, pathological and genetic overlap with mutations in one gene resulting in more than one pathological feature, and the same pathological feature being associated with defects in more than one gene. Increasing application of whole exome sequencing is broadening the clinical and pathological spectra in congenital myopathies, but pathology still has a role in clarifying the pathogenicity of gene variants as well as directing molecular analysis.
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Affiliation(s)
- C A Sewry
- Dubowitz Neuromuscular Centre, UCL Institute of Child Health and Great Ormond Street Hospital for Children, London, UK.,Wolfson Centre for Inherited Neuromuscular Diseases, RJAH Orthopaedic Hospital, Oswestry, UK
| | - C Wallgren-Pettersson
- The Folkhälsan Institute of Genetics and the Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
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Sagath L, Lehtokari V, Wallgren-Pettersson C, Pelin K, Kiiski K. A novel copy number variation detection array for the diagnostics of neuromuscular disorders. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Laitila J, Lehtonen J, Marttila M, Sagath L, Lehtokari V, Grönholm M, Wallgren-Pettersson C, Pelin K. Functional assessment of nebulin interactions with actin. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Lehtokari V, Pelin K, Wallgren-Pettersson C. ACTA1-related mild or typical nemaline myopathy in a three-generation Finnish family. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pelin K, Lehtokari V, Sagath L, Wallgren-Pettersson C, Kiiski K. Large copy number variants are common in the nebulin gene. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Laitila J, Marttila M, Lehtokari V, Wallgren-Pettersson C, Pelin K. Functional assessment of nebulin missense variants. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kiiski K, Lehtokari VL, Manzur AY, Sewry C, Zaharieva I, Muntoni F, Pelin K, Wallgren-Pettersson C. A Large Deletion Affecting TPM3, Causing Severe Nemaline Myopathy. J Neuromuscul Dis 2015; 2:433-438. [PMID: 27858751 PMCID: PMC5240603 DOI: 10.3233/jnd-150107] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Objectives: Nemaline myopathy may be caused by pathogenic variants in the TPM3 gene and is then called NEM1. All previously identified disease-causing variants are point mutations including missense, nonsense and splice-site variants. The aim of the study was to identify the disease-causing gene in this patient and verify the NM diagnosis. Methods: Mutation analysis methods include our self-designed nemaline myopathy array, The Nemaline Myopathy Comparative Genomic Hybridisation Array (NM-CGH array), whole-genome array-CGH, dHPLC, Sanger sequencing and whole-exome sequencing. The diagnostic muscle biopsy was investigated further by routine histopathological methods. Results: We present here the first large (17–21 kb) aberration in the α-tropomyosinslow gene (TPM3), identified using the NM-CGH array. This homozygous deletion removes the exons 1a and 2b as well as the promoter of the TPM3 isoform encoding Tpm3.12st. The severe phenotype included paucity of movement, proximal and axial weakness and feeding difficulties requiring nasogastric tube feeding. The infant died at the age of 17.5 months. Muscle biopsy showed variation in fibre size and rods in a population of hypotrophic muscle fibres expressing slow myosin, often with internal nuclei, and abnormal immunolabelling revealing many hybrid fibres. Conclusions: This is the only copy number variation we have identified in any NM gene other than nebulin (NEB), suggesting that large deletions or duplications in these genes are very rare, yet possible, causes of NM.
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Affiliation(s)
- K Kiiski
- The Folkhälsan Institute of Genetics and the Department of Medical and Clinical Genetics, Medicum, University of Helsinki, Helsinki, Finland
| | - V-L Lehtokari
- The Folkhälsan Institute of Genetics and the Department of Medical and Clinical Genetics, Medicum, University of Helsinki, Helsinki, Finland
| | - A Y Manzur
- Great Ormond Street Hospital, London, UK
| | - C Sewry
- Great Ormond Street Hospital, London, UK.,Dubowitz Neuromuscular Centre, UCL Institute of Child Health, London, UK
| | - I Zaharieva
- Dubowitz Neuromuscular Centre, UCL Institute of Child Health, London, UK
| | - F Muntoni
- Great Ormond Street Hospital, London, UK.,Dubowitz Neuromuscular Centre, UCL Institute of Child Health, London, UK
| | - K Pelin
- The Folkhälsan Institute of Genetics and the Department of Medical and Clinical Genetics, Medicum, University of Helsinki, Helsinki, Finland.,Department of Biosciences, Division of Genetics, University of Helsinki, Helsinki, Finland
| | - C Wallgren-Pettersson
- The Folkhälsan Institute of Genetics and the Department of Medical and Clinical Genetics, Medicum, University of Helsinki, Helsinki, Finland
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Marttila M, Lehtokari V, Marston S, Nyman T, Barnerias C, Beggs A, Bertin E, Ceyhan-Birsoy Ö, Cintas P, Gerard M, Gilbert-Dussardier B, Hogue J, Longman C, Eymard B, Frydman M, Kang P, Klinge L, Kolski H, Lochmüller H, Magy L, Manel V, Mayer M, North K, Peudenier-Robert S, Pihko H, Probst F, Reisin R, Stewart W, Taratuto A, de Visser M, Wilichowski E, Winer J, Nowak K, Lain N, Winder T, Monnier N, Clarke N, Pelin K, Grönholm M, Wallgren-Pettersson C. G.P.271. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kiiski K, Lehtokari V, Laari L, Wallgren-Pettersson C, Pelin K. G.P.266. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dabaj I, Quijano-Roy S, Estournet B, Eymard B, Stojkovic T, Wallgren-Pettersson C, Carlier P, Andres DG, Dore B, Malfatti E, Romero N, Carlier R. G.P.268. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Malfatti E, Lehtokari V, Schaeffer U, Bohm J, Estournet B, Quijano-Roy S, Monges S, Lubieniecki F, Bellance R, Taratuto A, Eymard B, Fardeau M, Wallgren-Pettersson C, Laporte J, Romero N. P.9.7 Skeletal muscle biopsy reappraisal in nebulin-related nemaline myopathy. Neuromuscul Disord 2013. [DOI: 10.1016/j.nmd.2013.06.520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kiiski K, Lehtokari V, Laari L, Lunkka-Hytönen M, Angelini C, Petty R, Hackman P, Udd B, Wallgren-Pettersson C, Pelin K. D.P.13 Targeted array CGH analysis of the nebulin gene: Identification of large deletions causing nemaline myopathy. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Memo M, Clarke N, Laing N, Nowak K, Ravenscroft G, Sewry C, Jain R, Jayawant S, Lehtokari V, Marttila M, Wallgren-Pettersson C, Marston S. C.P.18 Skeletal muscle myopathy mutations at the actin tropomyosin interface that cause gain or loss of function. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Lehtokari V, Kiiski K, Pelin K, Wallgren-Pettersson C. C.P.13 The clinical spectrum of entities caused by mutations in the nebulin gene. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mokbel N, Ilkovski B, Memo M, Marttila M, Kreissl M, Wallgren-Pettersson C, Menard D, Marcorelles P, Echaniz-Laguna A, Reimann J, Vainzof M, Monnier N, Nowak K, McNamara E, Laing N, Trewhella J, Jeffries C, Ottenheijm C, North K, Clarke N. C.P.15 K7del is a recurrent TPM2 nemaline myopathy mutation associated with joint contractures and increased calcium sensitivity. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kiiski K, Laari L, Lehtokari VL, Lunkka-Hytönen M, Angelini C, Petty R, Hackman P, Wallgren-Pettersson C, Pelin K. Targeted array comparative genomic hybridization--a new diagnostic tool for the detection of large copy number variations in nemaline myopathy-causing genes. Neuromuscul Disord 2012; 23:56-65. [PMID: 23010307 DOI: 10.1016/j.nmd.2012.07.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 07/16/2012] [Indexed: 11/28/2022]
Abstract
Nemaline myopathy (NM) constitutes a heterogeneous group of congenital myopathies. Mutations in the nebulin gene (NEB) are the main cause of recessively inherited NM. NEB is one of the most largest genes in human. To date, 68 NEB mutations, mainly small deletions or point mutations have been published. The only large mutation characterized is the 2.5 kb deletion of exon 55 in the Ashkenazi Jewish population. To investigate any copy number variations in this enormous gene, we designed a novel custom comparative genomic hybridization microarray, NM-CGH, targeted towards the seven known genes causative for NM. During the validation of the NM-CGH array we identified two novel deletions in two different families. The first is the largest deletion characterized in NEB to date, (∼53 kb) encompassing 24 exons. The second deletion (1 kb) covers two exons. In both families, the copy number change was the second mutation to be characterized and shown to have been inherited from one of the healthy carrier parents. In addition to these novel mutations, copy number variation was identified in four samples in three families in the triplicate region of NEB. We conclude that this method appears promising for the detection of copy number variations in NEB.
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Affiliation(s)
- K Kiiski
- The Folkhälsan Institute of Genetics and the Department of Medical Genetics, University of Helsinki, Haartman Institute, Helsinki, Finland.
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Campana-Salort E, Franques J, Attarian S, Verschueren A, Maues de Paula A, Eymard B, Fernandez C, Suominen T, Penttilä S, Richard P, Monnier N, Lehtokari VL, Wallgren-Pettersson C, Figarella-Branger D, Levy N, Pellissier JF, Udd B, Krahn M, Pouget J. Myopathies distales : à propos d’une étude rétrospective. Rev Neurol (Paris) 2012. [DOI: 10.1016/s0035-3787(12)70029-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hanif M, Grönholm M, Pelin K, Wallgren-Pettersson C. P3.46 Studying the pathogenesis of nebulin-caused nemaline myopathy and related disorders. Neuromuscul Disord 2011. [DOI: 10.1016/j.nmd.2011.06.940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lehtokari V, Pelin K, Wallgren-Pettersson C. P1.40 dHLPC for mutation analysis of β- and α(slow)-tropomyosins (TPM2 and TPM3). Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hanif M, Marttila M, Pelin K, Gronholm M, Wallgren-Pettersson C. P1.42 Pathogenetic studies of nebulin: a giant myofibrillar protein. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Romero NB, Lehtokari VL, Quijano-Roy S, Monnier N, Claeys KG, Carlier RY, Pellegrini N, Orlikowski D, Barois A, Laing NG, Lunardi J, Fardeau M, Pelin K, Wallgren-Pettersson C. CORE-ROD MYOPATHY CAUSED BY MUTATIONS IN THE NEBULIN GENE. Neurology 2009; 73:1159-61. [DOI: 10.1212/wnl.0b013e3181bacf45] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Marttila M, Nuutinen E, Hanif M, Nyman T, Donner K, Pelin K, Grönholm M, Wallgren-Pettersson C. G.P.7.09 Functional studies of aberrant beta-tropomyosin causing nemaline myopathy and cap myopathy. Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lehtokari V, Kalimo H, Pelin K, Wallgren-Pettersson C. G.P.7.03 Mutations in TPM2 and TPM3 causing nemaline myopathy or arthrogryposis. Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lunkka-Hytönen M, Lehtokari V, Wallgren-Pettersson C, Pelin K. G.P.7.01 Analysis of the nebulin gene by multiplex-ligation dependent probe amplification (MLPA) and methylation-specific MLPA. Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Marttila M, Nuutinen E, Brudzewsky D, Ollila S, Donner K, Pelin K, Wallgren-Pettersson C. G.P.13.02 Functional study of mutated beta-tropomyosin causing nemaline myopathy, cap myopathy and distal arthrogryposis. Neuromuscul Disord 2008. [DOI: 10.1016/j.nmd.2008.06.287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ranta S, Lehtokari V, Nuutinen E, Brudzewsky D, Wallgren-Pettersson C, Pelin K. G.P.9.03 Characterization of the nebulin promoter and detection of brain-specific transcripts. Neuromuscul Disord 2008. [DOI: 10.1016/j.nmd.2008.06.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Lunkka-Hytonen M, Lehtokari V, Pelin K, Brudzewsky D, Wallgren-Pettersson C. G.P.9.04 Development of the multiplex ligation-dependent probe amplification (MLPA) method for identifying large scale mutations in the nebulin gene. Neuromuscul Disord 2008. [DOI: 10.1016/j.nmd.2008.06.216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Toussaint A, Nicot A, Dondaine N, Kretz C, Poirson C, Zanoteli E, Wallgren-Pettersson C, Echaniz-Laguna A, Bomme Ousager L, Krause A, Jern C, Merlini L, Oliveira A, Biancalana V, Mandel J, Laporte J. C.P.4.10 Mutation spectrum of the large GTPase dynamin 2 in autosomal centronuclear myopathy. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Brudzewsky D, Marttila M, Nuutinen E, Ollila S, Donner K, Pelin K, Wallgren-Pettersson C. C.P.1.12 One causative gene, TPM2, and two congenital myopathies. A functional study. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lehtokari V, Pelin K, Donner K, Voit T, Rudnik-Schöneborn S, Wallgren-Pettersson C. C.P.1.08 A homozygous deletion of TPM3 causing severe nemaline myopathy in two Turkish sib pairs from separate families. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lehtokari V, Pelin K, Nuutinen E, Wallgren-Pettersson C. G.P.8 01 Development of the multiplex ligation-dependent probe amplification (MLPA) method for the detection of large deletions in the nebulin gene. Neuromuscul Disord 2006. [DOI: 10.1016/j.nmd.2006.05.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bertini E, Biancalana V, Bolino A, Buj Bello A, Clague M, Guicheney P, Jungbluth H, Kress W, Musaro' A, Nandurkar H, Pirola L, Romero N, Senderek J, Suter U, Sewry C, Tronchere H, Wallgren-Pettersson C, Wishart MJ, Laporte J. 118th ENMC International Workshop on Advances in Myotubular Myopathy. 26-28 September 2003, Naarden, The Netherlands. (5th Workshop of the International Consortium on Myotubular Myopathy). Neuromuscul Disord 2004; 14:387-96. [PMID: 15145343 DOI: 10.1016/j.nmd.2004.04.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2004] [Indexed: 11/21/2022]
MESH Headings
- Bacterial Proteins/genetics
- Bacterial Proteins/metabolism
- Charcot-Marie-Tooth Disease/genetics
- Charcot-Marie-Tooth Disease/metabolism
- Chromosomes, Human, X
- Humans
- Insulin-Like Growth Factor I/genetics
- Insulin-Like Growth Factor I/metabolism
- Mutation
- Myopathies, Structural, Congenital/congenital
- Myopathies, Structural, Congenital/diagnosis
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/therapy
- Netherlands
- Protein Tyrosine Phosphatases/genetics
- Protein Tyrosine Phosphatases/physiology
- Protein Tyrosine Phosphatases, Non-Receptor
- Trans-Activators/genetics
- Trans-Activators/metabolism
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Affiliation(s)
- E Bertini
- Department of Laboratories, Unit of Molecular Medicine, Bambino Gesu' Childrens Hospital, P.za S. Onofrio 4, 00165 Rome, Italy.
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41
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Kristiansen M, Knudsen GP, Tanner SM, McEntagart M, Jungbluth H, Muntoni F, Sewry C, Gallati S, Ørstavik KH, Wallgren-Pettersson C. X-inactivation patterns in carriers of X-linked myotubular myopathy. Neuromuscul Disord 2003; 13:468-71. [PMID: 12899873 DOI: 10.1016/s0960-8966(03)00067-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
X-linked myotubular myopathy is a rare severe muscle disorder in affected male neonates. Most female carriers are free from symptoms. Skewed X inactivation has been proposed to be responsible for the affected phenotype seen in some carriers. We have compared the X inactivation patterns in blood DNA with the clinical phenotype in carriers of X-linked myotubular myopathy. The X-inactivation analysis was performed using HpaII predigestion of DNA followed by polymerase chain reaction of the highly polymorphic CAG repeat of the androgen receptor (AR) gene. The frequency of skewed X inactivation was similar in the X-linked myotubular myopathy carriers (22%) and in 235 controls (18%). Three overtly affected carriers had skewed X inactivation with the mutated X as the predominantly active X in at least two of them. Four females with mild symptoms had random X inactivation. The unaffected X-linked myotubular myopathy carriers had either skewed X inactivation in favour of expression from the normal X or random X-inactivation. Thus, there was a tendency for females with a more severe phenotype to have a skewed pattern of X inactivation, while females with an intermediate phenotype had a random pattern of X-inactivation.
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Affiliation(s)
- M Kristiansen
- Department of Medical Genetics, Institute of Medical Genetics, University of Oslo, Oslo, Norway.
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42
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Jungbluth H, Sewry CA, Buj-Bello A, Kristiansen M, Ørstavik KH, Kelsey A, Manzur AY, Mercuri E, Wallgren-Pettersson C, Muntoni F. Early and severe presentation of X-linked myotubular myopathy in a girl with skewed X-inactivation. Neuromuscul Disord 2003; 13:55-9. [PMID: 12467733 DOI: 10.1016/s0960-8966(02)00194-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
X-linked myotubular myopathy is a severe congenital myopathy in males, caused by mutations in the myotubularin (MTM1) gene on chromosome Xq28. In heterozygous carriers of MTM1 mutations, clinical symptoms are usually absent or only mild. We report a 6-year-old girl presenting at birth with marked hypotonia and associated feeding and respiratory difficulties. A muscle biopsy performed at 5 months suggested a diagnosis of myotubular myopathy. On examination at 6 years she had marked facial weakness with bilateral ptosis and external ophthalmoplegia, severe axial and proximal weakness and a mild scoliosis. Muscle magnetic resonance imaging showed a distinctive pattern of muscle involvement. Molecular genetic investigation of the MTM1 gene identified a heterozygous mutation in exon 12. X-inactivation studies in lymphocytes showed an extremely skewed pattern (97:3). This case emphasizes that investigation of the MTM1 gene and X-inactivation studies are indicated in isolated females with histopathological and clinical findings suggestive of myotubular myopathy.
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Affiliation(s)
- H Jungbluth
- Department of Paediatrics, Dubowitz Neuromuscular Centre, Imperial College Faculty of Medicine, Hammersmith Hospital, Du Cane Road, London W12 0NN, UK
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43
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Durling HJ, Reilich P, Müller-Höcker J, Mendel B, Pongratz D, Wallgren-Pettersson C, Gunning P, Lochmüller H, Laing NG. De novo missense mutation in a constitutively expressed exon of the slow alpha-tropomyosin gene TPM3 associated with an atypical, sporadic case of nemaline myopathy. Neuromuscul Disord 2002; 12:947-51. [PMID: 12467750 DOI: 10.1016/s0960-8966(02)00182-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We describe an atypical case of nemaline myopathy with an unusual distribution of muscle weakness who presented at 14 years of age with kyphoscoliosis. In this patient, we demonstrate heterozygosity for a de novo CGT-CAT (Arg167His) mutation in a constitutively expressed exon (exon 5) of slow alpha-tropomyosin (TPM3). This is the first mutation identified in a constitutively expressed exon of TPM3 in a nemaline myopathy patient, but is similar to recently described mutations in beta-tropomyosin (TPM2) associated with nemaline myopathy and mutations in fast alpha-tropomyosin (TPM1) which cause hypertrophic cardiomyopathy.
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Affiliation(s)
- H J Durling
- Neurogenetics Laboratory, Royal Perth Hospital, Western Australia, Perth, Australia
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44
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Wattanasirichaigoon D, Swoboda KJ, Takada F, Tong HQ, Lip V, Iannaccone ST, Wallgren-Pettersson C, Laing NG, Beggs AH. Mutations of the slow muscle alpha-tropomyosin gene, TPM3, are a rare cause of nemaline myopathy. Neurology 2002; 59:613-7. [PMID: 12196661 DOI: 10.1212/wnl.59.4.613] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The alpha-tropomyosin-3 (TPM3) gene was screened in 40 unrelated patients with nemaline myopathy (NM). A single compound heterozygous patient was identified carrying one mutation that converts the stop codon to a serine and a second splicing mutation that is predicted to prevent inclusion of skeletal muscle exon IX. TPM3 mutations are a rare cause of NM, probably accounting for less than 3% of cases. The severity of cases with TPM3 mutations may vary from severe infantile to late childhood onset, slowly progressive forms.
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MESH Headings
- Amino Acid Substitution
- Blotting, Western
- Child
- Child, Preschool
- Codon, Terminator
- DNA Mutational Analysis
- Humans
- Male
- Muscle Fibers, Slow-Twitch
- Muscle, Skeletal/chemistry
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiopathology
- Mutation, Missense
- Myopathies, Nemaline/genetics
- Myopathies, Nemaline/pathology
- Myopathies, Nemaline/physiopathology
- Point Mutation
- Protein Isoforms/analysis
- Protein Isoforms/genetics
- Sarcomeres/pathology
- Sarcomeres/ultrastructure
- Tropomyosin/analysis
- Tropomyosin/genetics
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Affiliation(s)
- D Wattanasirichaigoon
- Genetics Division, Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
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45
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Wallgren-Pettersson C, Laing NG. Report of the 83rd ENMC International Workshop: 4th Workshop on Nemaline Myopathy, 22-24 September 2000, Naarden, The Netherlands. Neuromuscul Disord 2001; 11:589-95. [PMID: 11525890 DOI: 10.1016/s0960-8966(01)00208-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- C Wallgren-Pettersson
- The Folkhälsan Department of Medical Genetics, University of Helsinki, Helsinki, Finland.
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46
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Kääriäinen H, Wallgren-Pettersson C, Clarke A, Pihko H, Taskinen H, Rintala R. Hirschsprung disease, mental retardation and dysmorphic facial features in five unrelated children. Clin Dysmorphol 2001; 10:157-63. [PMID: 11446406 DOI: 10.1097/00019605-200107000-00001] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We report five patients with Hirschsprung disease, severe mental retardation and dysmorphic facial features including hypertelorism, prominent forehead and dysmorphic ears. All four boys had hypospadias. All had postnatally retarded growth. One of them had a de novo apparently balanced translocation 46,XY,t(2;11)(q22.2;q21). There are several reports on patients with Hirschsprung disease, mental retardation and various dysmorphic features. Some of them, especially those reported by Tanaka et al. [(1993) Pediatr Neurol 9:479-481], Lurie et al. [(1994) Genet Couns 5:11-14] and Mowat et al. [(1998) J Med Genet 35:617-623] closely resemble our patients suggesting that they have the same malformation syndrome.
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Affiliation(s)
- H Kääriäinen
- Department of Medical Genetics, The Family Federation of Finland, Helsinki.
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47
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Sewry CA, Brown SC, Pelin K, Jungbluth H, Wallgren-Pettersson C, Labeit S, Manzur A, Muntoni F. Abnormalities in the expression of nebulin in chromosome-2 linked nemaline myopathy. Neuromuscul Disord 2001; 11:146-53. [PMID: 11257470 DOI: 10.1016/s0960-8966(00)00172-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Nemaline myopathy is clinically and genetically heterogeneous. The most common autosomal recessive form affecting infants (NEM2) links to chromosome 2q, and is caused by mutations in the gene for nebulin. We have examined the immunocytochemical expression of nebulin in skeletal muscle in 11 cases of nemaline myopathy, from ten families, with linkage compatible to chromosome 2q.22, the locus for nebulin. Mutations in the gene for nebulin have been found in eight of these cases. Immunolabelling with polyclonal antibodies to C-terminal regions of nebulin was compared with antibodies to fibre-type-specific myofibrillar proteins, including myosin heavy chain isoforms and alpha-actinin isoforms. No cases showed a complete absence of C-terminal nebulin, and no enhancement of labelling of the rods was seen with conventional fluorescence microscopy. In control muscle an antibody to the M176-181 repeat region of nebulin showed higher expression in fibres with slow myosin, while ones to the serine-rich domain and to the SH3 domain showed uniform expression. In some cases of nemaline myopathy differences in these patterns were observed. Two siblings with a homozygous mutation in exon 185, that produces a stop codon, showed an absence of labelling only with the SH3 antibody, and other cases showed uneven labelling with this antibody or some fibres devoid of label. Fibre type correlations also showed differences from controls, as some fibres had a fast isoform of one protein but a slow isoform of another. These results indicate that analysis of nebulin expression may detect abnormalities in some cases linked to the corresponding locus and may help to direct molecular analysis. In addition, they may also be relevant to studies of fibre type plasticity and diversity in nemaline myopathy.
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MESH Headings
- Actinin/immunology
- Actinin/metabolism
- Adolescent
- Adult
- Child
- Child, Preschool
- Chromosomes, Human, Pair 2/genetics
- Gene Expression Regulation/physiology
- Genetic Linkage/genetics
- Humans
- Immunohistochemistry
- Infant
- Infant, Newborn
- Muscle Fibers, Skeletal/metabolism
- Muscle Fibers, Skeletal/pathology
- Muscle Proteins/genetics
- Muscle Proteins/immunology
- Muscle Proteins/metabolism
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiopathology
- Myopathies, Nemaline/genetics
- Myopathies, Nemaline/metabolism
- Myopathies, Nemaline/pathology
- Myosins/immunology
- Myosins/metabolism
- Protein Isoforms/genetics
- Protein Structure, Tertiary/genetics
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Affiliation(s)
- C A Sewry
- Department of Histopathology, Robert Jones and Agnes Hunt Orthopaedic and District Hospital NHS Trust, SY10 7AG, Oswestry, UK.
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48
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Gurgel-Giannetti J, Reed U, Bang ML, Pelin K, Donner K, Marie SK, Carvalho M, Fireman MA, Zanoteli E, Oliveira AS, Zatz M, Wallgren-Pettersson C, Labeit S, Vainzof M. Nebulin expression in patients with nemaline myopathy. Neuromuscul Disord 2001; 11:154-62. [PMID: 11257471 DOI: 10.1016/s0960-8966(00)00177-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Nemaline myopathy is a structural congenital myopathy which may show both autosomal dominant and autosomal recessive inheritance patterns. Mutations in three different genes have been identified as the cause of nemaline myopathy: the gene for slow alpha-tropomyosin 3 (TPM3) at 1q22-23, the nebulin gene (NEB) at 2q21.1-q22, and the actin gene (ACTA1) at 1q42. The typical autosomal recessive form appears to be the most common one and is caused by mutations in the nebulin gene. We have studied the pattern of nebulin labeling, in patients with the typical congenital form (ten patients), the severe congenital form (two patients) or the mild, childhood-onset form (one patient), using antibodies against three different domains of nebulin. A qualitative and quantitative nebulin analysis in muscle tissue showed the presence of nebulin in myofibers from all patients. Some differences relating to the rod structure were observed. The majority of the largest subsarcolemmal rods were not labeled with the N2 nebulin antibody (I-band epitope) and showed an indistinct pattern with the two antibodies directed to the Z-band portion of nebulin (epitopes M176-181 and serine-rich domain). Diffuse rods were not revealed using the three antibodies. A discordant pattern of nebulin N2 epitope labeling was found in two affected sisters with a mutation in the nebulin gene, suggesting that modifications in nebulin distribution inside the rods might occur with the progression of the disease. Western blot analysis showed no direct correlation with immunofluorescence data. In nine patients, the band had a molecular weight comparable to the normal control, while in one patient, it was detected with a higher molecular weight. Our results suggest that presence/absence of specific nebulin Z-band epitopes in rod structures is variable and could depend on the degree of rod organization.
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MESH Headings
- Adolescent
- Adult
- Biopsy
- Child
- Child, Preschool
- DNA Mutational Analysis
- Female
- Gene Expression Regulation/physiology
- Humans
- Immunohistochemistry
- Inclusion Bodies/metabolism
- Inclusion Bodies/pathology
- Infant
- Muscle Fibers, Fast-Twitch/metabolism
- Muscle Fibers, Fast-Twitch/pathology
- Muscle Fibers, Slow-Twitch/metabolism
- Muscle Fibers, Slow-Twitch/pathology
- Muscle Proteins/genetics
- Muscle Proteins/immunology
- Muscle Proteins/metabolism
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiopathology
- Mutation/physiology
- Myopathies, Nemaline/genetics
- Myopathies, Nemaline/metabolism
- Myopathies, Nemaline/pathology
- Sarcolemma/metabolism
- Sarcolemma/pathology
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Affiliation(s)
- J Gurgel-Giannetti
- Department of Neurology, LIM 15, School of Medicine, University of São Paulo, SP, São Paulo, Brazil
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Jungbluth H, Sewry CA, Brown SC, Nowak KJ, Laing NG, Wallgren-Pettersson C, Pelin K, Manzur AY, Mercuri E, Dubowitz V, Muntoni F. Mild phenotype of nemaline myopathy with sleep hypoventilation due to a mutation in the skeletal muscle alpha-actin (ACTA1) gene. Neuromuscul Disord 2001; 11:35-40. [PMID: 11166164 DOI: 10.1016/s0960-8966(00)00167-x] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Nemaline myopathy is a clinically and genetically heterogeneous condition. The clinical spectrum ranges from severe cases with antenatal or neonatal onset and early death to late onset cases with only slow progression. Three genes are known to cause nemaline myopathy: the genes for nebulin (NEB) on chromosome 2q22, slow alpha-tropomyosin (TPM3) on chromosome 1q21 and skeletal muscle alpha-actin (ACTA1) on chromosome 1q42. We present a 39-year-old lady with a mild form of nemaline myopathy, whom we have followed over a period of 25 years. She presented at the age of 7 years with symptoms of mild axial and proximal muscle weakness. The overall course was essentially static, but at 36 years, she went into life-threatening respiratory failure, for which she is currently treated with night-time ventilation. Muscle biopsies at 12, 17 and 39 years of age showed typical nemaline rods, particularly in type 1 fibres. Areas with unevenness of oxidative stain were present in the second and third biopsies. The presence of rods and core-like areas was confirmed on electron microscopy. There was no detectable alteration in actin expression immunocytochemically. A dominant missense mutation in the skeletal muscle alpha-actin gene (ACTA1) was found. This case illustrates the clinical and genetic heterogeneity of nemaline myopathy, and one phenotype of the wide spectrum of severity caused by mutations in the skeletal muscle alpha-actin (ACTA1) gene. In addition, it shows the diversity of pathological features that can occur in congenital myopathies due to mutations in the same gene.
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MESH Headings
- Actins/genetics
- Actins/metabolism
- Adult
- Biopsy
- Cardiovascular Physiological Phenomena
- Chromosomes, Human, Pair 1/genetics
- Creatine Kinase/analysis
- DNA Mutational Analysis
- Female
- Humans
- Magnetic Resonance Imaging
- Microscopy, Electron
- Muscle, Skeletal/diagnostic imaging
- Muscle, Skeletal/pathology
- Muscle, Skeletal/ultrastructure
- Mutation, Missense/genetics
- Myopathies, Nemaline/complications
- Myopathies, Nemaline/genetics
- Myopathies, Nemaline/physiopathology
- Phenotype
- Sleep Apnea Syndromes/genetics
- Sleep Apnea Syndromes/physiopathology
- Ultrasonography
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Affiliation(s)
- H Jungbluth
- Department of Paediatrics and Neonatal Medicine, Neuromuscular Unit, Imperial College School of Medicine, Hammersmith Hospital, Du Cane Road, W12 0NN, London, UK
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50
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