1
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Schultz LE, Colpan M, Smith GE, Mayfield RM, Larrinaga TM, Kostyukova AS, Gregorio CC. A nemaline myopathy-linked mutation inhibits the actin-regulatory functions of tropomodulin and leiomodin. Proc Natl Acad Sci U S A 2023; 120:e2315820120. [PMID: 37956287 PMCID: PMC10665800 DOI: 10.1073/pnas.2315820120] [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: 09/19/2023] [Accepted: 10/06/2023] [Indexed: 11/15/2023] Open
Abstract
Actin is a highly expressed protein in eukaryotic cells and is essential for numerous cellular processes. In particular, efficient striated muscle contraction is dependent upon the precise regulation of actin-based thin filament structure and function. Alterations in the lengths of actin-thin filaments can lead to the development of myopathies. Leiomodins and tropomodulins are members of an actin-binding protein family that fine-tune thin filament lengths, and their dysfunction is implicated in muscle diseases. An Lmod3 mutation [G326R] was previously identified in patients with nemaline myopathy (NM), a severe skeletal muscle disorder; this residue is conserved among Lmod and Tmod isoforms and resides within their homologous leucine-rich repeat (LRR) domain. We mutated this glycine to arginine in Lmod and Tmod to determine the physiological function of this residue and domain. This G-to-R substitution disrupts Lmod and Tmod's LRR domain structure, altering their binding interface with actin and destroying their abilities to regulate thin filament lengths. Additionally, this mutation renders Lmod3 nonfunctional in vivo. We found that one single amino acid is essential for folding of Lmod and Tmod LRR domains, and thus is essential for the opposing actin-regulatory functions of Lmod (filament elongation) and Tmod (filament shortening), revealing a mechanism underlying the development of NM.
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Affiliation(s)
- Lauren E. Schultz
- Department of Cellular and Molecular Medicine and Sarver Molecular Cardiovascular Research Program, The University of Arizona, Tucson, AZ85724
| | - Mert Colpan
- Department of Cellular and Molecular Medicine and Sarver Molecular Cardiovascular Research Program, The University of Arizona, Tucson, AZ85724
| | - Garry E. Smith
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA99164
| | - Rachel M. Mayfield
- Department of Cellular and Molecular Medicine and Sarver Molecular Cardiovascular Research Program, The University of Arizona, Tucson, AZ85724
| | - Tania M. Larrinaga
- Department of Cellular and Molecular Medicine and Sarver Molecular Cardiovascular Research Program, The University of Arizona, Tucson, AZ85724
| | - Alla S. Kostyukova
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA99164
| | - Carol C. Gregorio
- Department of Cellular and Molecular Medicine and Sarver Molecular Cardiovascular Research Program, The University of Arizona, Tucson, AZ85724
- Department of Medicine, Cardiovascular Research Institute, Icahn School of Medicine, New York, NY10029
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2
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Bezirganoglu H, Adanur Saglam K. An Unusual Case of Neonatal Hypotonia and Femur Fracture: Neuromuscular Variant of Glycogen Storage Disease Type IV. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1375. [PMID: 37628374 PMCID: PMC10453659 DOI: 10.3390/children10081375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/04/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023]
Abstract
Glycogen storage disease type IV (GSD IV) (OMIM #232500) is an autosomal recessive disorder caused by deficiency of the glycogen-branching enzyme. Here, we report a patient presenting with prematurity and severe hypotonia resulting from a complicated pregnancy with polyhydramnios. During her stay in the neonatal unit, the infant remained dependent on a ventilator, and her movements were mostly absent, except for occasional small movements of her fingers. A spontaneous fracture of femur shaft occurred in the postnatal fourth week. Whole-exome sequencing of DNA from the patient revealed a homozygous missense variant in the GBE1 gene (c.1693C>T, p.Arg565Trp). The variation detected in the index case was also confirmed by Sanger sequencing in the patient and respective parents. This study showed that the neuromuscular subtypes of GSD-IV should be considered as a possible differential diagnosis in severe neonatal hypotonia cases.
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Affiliation(s)
- Handan Bezirganoglu
- Division of Neonatology, Trabzon Kanuni Training and Research Hospital, Trabzon 61080, Türkiye
| | - Kubra Adanur Saglam
- Department of Medical Genetics, Karadeniz Technical University Medical Faculty, Trabzon 61080, Türkiye
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3
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Segarra-Casas A, Collet R, Gonzalez-Quereda L, Vesperinas A, Caballero-Ávila M, Carbayo A, Díaz-Manera J, Rodriguez MJ, Gallardo E, Gallano P, Olivé M. A new homozygous missense variant in LMOD3 gene causing mild nemaline myopathy with prominent facial weakness. Neuromuscul Disord 2023; 33:319-323. [PMID: 36893608 DOI: 10.1016/j.nmd.2023.02.006] [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: 11/23/2022] [Revised: 01/24/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023]
Abstract
Nemaline myopathy (NEM) type 10, caused by biallelic mutations in LMOD3, is a severe congenital myopathy clinically characterized by generalized hypotonia and muscle weakness, respiratory insufficiency, joint contractures, and bulbar weakness. Here, we describe a family with two adult patients presenting mild nemaline myopathy due to a novel homozygous missense variant in LMOD3. Both patients presented mild delayed motor milestones, frequent falls during infancy, prominent facial weakness and mild muscle weakness in the four limbs. Muscle biopsy showed mild myopathic changes and small nemaline bodies in a few fibers. A neuromuscular gene panel revealed a homozygous missense variant in LMOD3 that co-segregated with the disease in the family (NM_198271.4: c.1030C>T; p.Arg344Trp). The patients described here provide evidence of the phenotype-genotype correlation, suggesting that non-truncating variants in LMOD3 lead to milder phenotypes of NEM type 10.
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Affiliation(s)
- Alba Segarra-Casas
- Genetics Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain; Genetics and Microbiology Department, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Roger Collet
- Neuromuscular Diseases Unit, Neurology Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Lidia Gonzalez-Quereda
- Genetics Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain; Genetics and Microbiology Department, Universitat Autònoma de Barcelona, Bellaterra, Spain; Center for Biomedical Network Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Ana Vesperinas
- Neuromuscular Diseases Unit, Neurology Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Marta Caballero-Ávila
- Neuromuscular Diseases Unit, Neurology Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Alvaro Carbayo
- Neuromuscular Diseases Unit, Neurology Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Jordi Díaz-Manera
- John Walton Muscular Dystrophy Research Center. Newcastle University Translational and Clinical Research Institute, Newcastle, UK
| | - María José Rodriguez
- Genetics Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Eduard Gallardo
- Neuromuscular Diseases Unit, Neurology Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain; Center for Biomedical Network Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Pia Gallano
- Genetics Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain; Center for Biomedical Network Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Montse Olivé
- Neuromuscular Diseases Unit, Neurology Department, Institut d'Investigació Biomèdica Sant Pau (IIB SANT PAU), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain; Center for Biomedical Network Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain.
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4
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Bouman K, Dittrich AT, Groothuis JT, van Engelen BG, Janssen MC, Voermans NC, Draaisma JM, Erasmus CE. Bone Quality in Patients with a Congenital Myopathy: A Scoping Review. J Neuromuscul Dis 2023; 10:1-13. [PMID: 36314217 PMCID: PMC9881028 DOI: 10.3233/jnd-221543] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Congenital myopathies are rare neuromuscular disorders presenting with a wide spectrum of clinical features, including long bone fractures (LBFs) that negatively influence functional prognosis, quality of life and survival. Systematic research on bone quality in these patients is lacking. OBJECTIVE This scoping review aims to summarize all evidence on bone quality and to deduce recommendations for bone quality management in congenital myopathies. METHODS Five electronic databases (Pubmed, Embase, Cochrane, Web of Science, CINAHL) were searched. All studies on bone quality in congenital myopathies were included. Decreased bone quality was defined as low bone mineral density and/or (fragility) LBFs. Study selection and data extraction were performed by three independent reviewers. RESULTS We included 244 single cases (mean: 4.1±7.6 years; median: 0 years) diagnosed with a congenital myopathy from 35 articles. Bone quality was decreased in 93 patients (37%) (mean: 2.6±6.8 years; median: 0 years). Low bone mineral density was reported in 11 patients (4.5%) (mean: 10.9±9.7; median: 11 years). Congenital LBFs were reported in 64 patients (26%). (Fragility) LBFs later at life were described in 24 patients (9.8%) (mean: 14.9±11.0; median: 14 years). Four cases (1.6%) were reported to receive vitamin D and/or calcium supplementation or diphosphonate administration. CONCLUSION LBFs are thus frequently reported in congenital myopathies. We therefore recommend optimal bone quality management through bone mineral density assessment, vitamin D and calcium suppletion, and referral to internal medicine or pediatrics for consideration of additional therapies in order to prevent complications of low bone mineral density.
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Affiliation(s)
- Karlijn Bouman
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands,
Department of Pediatric Neurology, Donders Institute for Brain, Cognition and Behaviour, Amalia Children’s Hospital, Radboud University Medical Center, Nijmegen, the Netherlands,Correspondence to: Karlijn Bouman, Department of Neurology and Pediatric Neurology, Radboud university medical center, Geert Grooteplein Zuid 10, 6525 GA, Nijmegen, the Netherlands. Tel.: +31 650193738; Fax: +31 243635135; E-mail:
| | - Anne T.M. Dittrich
- Department of Pediatrics, Radboud Institute for Health Sciences, Amalia Children’s Hospital, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Jan T. Groothuis
- Department of Rehabilitation, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Baziel G.M. van Engelen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Mirian C.H. Janssen
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Nicol C. Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Jos M.T. Draaisma
- Department of Pediatrics, Radboud Institute for Health Sciences, Amalia Children’s Hospital, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Corrie E. Erasmus
- Department of Pediatric Neurology, Donders Institute for Brain, Cognition and Behaviour, Amalia Children’s Hospital, Radboud University Medical Center, Nijmegen, the Netherlands
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5
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ASC1 complex related conditions: Two novel paediatric patients with TRIP4 pathogenic variants and review of literature. Eur J Med Genet 2022; 65:104469. [PMID: 35276412 DOI: 10.1016/j.ejmg.2022.104469] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 01/11/2022] [Accepted: 02/25/2022] [Indexed: 11/22/2022]
Abstract
Pathogenic variants in the genes encoding for the ASC1 complex were recently reported in patients with congenital fractures, joint contractures, neonatal hypotonia and respiratory distress. Here we report two male children with biallelic TRIP4 pathogenic loss of function variants. The first child presented with foetal bradykinesia, neonatal respiratory distress, central and peripheral hypotonia, constipation, hyperlaxity, left uretero-hydronephrosis and post-obstructive kidney dysplasia. The second had severe central and peripheral neonatal hypotonia, feeding difficulties, kyphosis, developmental delay and hyperlaxity. Detailed review of all reported cases with ASCC1 (12 patients) and TRIP4 (18 patients) variants highlights striking genotype-phenotype correlations. This is the fourth report of patients with TRIP4 variants and the first description of post-obstructive kidney dysplasia in this condition.
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6
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Liu D, Yu J, Wang X, Yang Y, Yu L, Zeng S, Zhang M, Xu G. Case Report: Prenatal Diagnosis of Nemaline Myopathy. Front Pediatr 2022; 10:937668. [PMID: 35928692 PMCID: PMC9343628 DOI: 10.3389/fped.2022.937668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 06/22/2022] [Indexed: 11/20/2022] Open
Abstract
Nemaline myopathy (NM) is a rare, hereditary heterogeneous myopathy. Fetal NM has a more severe disease course and a poorer prognosis and is usually lethal during the first few months of life. Hence, early prenatal diagnosis is especially important for clinical interventions and patient counseling. We report the case of a fetus with NM due to KLHL40 gene variation leading to arthrogryposis multiplex congenita (AMC). The ultrasonography and histopathology results revealed an enhanced echo intensity and decreased muscle thickness, which may be novel features providing early clues for the prenatal diagnosis of NM. Moreover, to our knowledge, this article is the first report to describe a case of NM associated with complex congenital heart disease (CHD).
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Affiliation(s)
- Dongmei Liu
- Department of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Center of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Clinical Research Center for Medical Imaging in Hunan Province, Changsha, China
| | - Jiali Yu
- Department of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Center of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Clinical Research Center for Medical Imaging in Hunan Province, Changsha, China
| | - Xin Wang
- Department of Obstetrics and Gynecology Prenatal Diagnosis Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yang Yang
- Department of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Center of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Clinical Research Center for Medical Imaging in Hunan Province, Changsha, China
| | - Li Yu
- Department of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Center of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Clinical Research Center for Medical Imaging in Hunan Province, Changsha, China
| | - Shi Zeng
- Department of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Center of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Clinical Research Center for Medical Imaging in Hunan Province, Changsha, China
| | - Ming Zhang
- Department of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Center of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Clinical Research Center for Medical Imaging in Hunan Province, Changsha, China
| | - Ganqiong Xu
- Department of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Center of Ultrasound Diagnostic, The Second Xiangya Hospital, Central South University, Changsha, China.,Clinical Research Center for Medical Imaging in Hunan Province, Changsha, China
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7
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Laitila J, Wallgren-Pettersson C. Recent advances in nemaline myopathy. Neuromuscul Disord 2021; 31:955-967. [PMID: 34561123 DOI: 10.1016/j.nmd.2021.07.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 11/18/2022]
Abstract
The nemaline myopathies constitute a large proportion of the congenital or structural myopathies. Common to all patients is muscle weakness and the presence in the muscle biopsy of nemaline rods. The causative genes are at least twelve, encoding structural or regulatory proteins of the thin filament, and the clinical picture as well as the histological appearance on muscle biopsy vary widely. Here, we suggest a renewed clinical classification to replace the original one, summarise what is known about the pathogenesis from mutations in each causative gene to the forms of nemaline myopathy described to date, and provide perspectives on pathogenetic mechanisms possibly open to therapeutic modalities.
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Affiliation(s)
- Jenni Laitila
- The Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland; Department of Medical Genetics, Medicum, University of Helsinki, Finland; Department of Biomedical Sciences, University of Copenhagen, Denmark.
| | - Carina Wallgren-Pettersson
- The Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland; Department of Medical Genetics, Medicum, University of Helsinki, Finland
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8
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Lmod3 promotes myoblast differentiation and proliferation via the AKT and ERK pathways. Exp Cell Res 2020; 396:112297. [DOI: 10.1016/j.yexcr.2020.112297] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 09/17/2020] [Accepted: 09/19/2020] [Indexed: 12/29/2022]
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9
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Adaikina A, Hofman PL, O'Grady GL, Gusso S. Exercise Training as Part of Musculoskeletal Management for Congenital Myopathy: Where Are We Now? Pediatr Neurol 2020; 104:13-18. [PMID: 31926608 DOI: 10.1016/j.pediatrneurol.2019.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/19/2019] [Accepted: 10/22/2019] [Indexed: 01/02/2023]
Abstract
Congenital myopathy is a heterogeneous group of muscle disorders characterized by muscle weakness and hypotonia. This condition is associated with a range of skeletal, respiratory, and ophthalmologic complications and requires a multidisciplinary therapeutic approach aimed at maximizing the function and independence of patients. One promising direction for therapeutic intervention is physical exercise rehabilitation, given its demonstrated ability to promote muscle and bone health of patients with a variety of neuromuscular conditions. However, there are few data to assist health care professionals identify the optimal physical activity levels and exercise type, including the intensity, frequency, and duration. This lack of empirical evidence is particularly problematic given the fact that inappropriate exercise modes can potentially cause muscle damage in patients with congenital myopathy. In this article, we discuss the rationale behind the incorporation of two types of physical exercises, strength and aerobic training, into the clinical care of patients with congenital myopathy. Given the paucity of literature on the management of congenital myopathy, we review the results of published research on the treatment of both congenital myopathy and other neuromuscular diseases that could provide helpful insights into the physical rehabilitation of patients with congenital myopathy. We also discuss the potential benefits of vibration therapy, which has been studied in patients with other neuromuscular disorders over the last two decades. We conclude by proposing directions for future research on physical rehabilitation of patients with congenital myopathy.
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Affiliation(s)
- Alena Adaikina
- Liggins Institute, University of Auckland, Auckland, New Zealand.
| | - Paul L Hofman
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Gina L O'Grady
- Paediatric Neurology Department, Starship Children's Hospital, Auckland, New Zealand
| | - Silmara Gusso
- Department of Exercise Sciences, University of Auckland, Auckland, New Zealand
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10
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Marguet F, Rendu J, Vanhulle C, Bedat-Millet AL, Brehin AC, Fauré J, Laquerrière A. Association of fingerprint bodies with rods in a case with mutations in the LMOD3 gene. Neuromuscul Disord 2019; 30:207-212. [PMID: 32008911 DOI: 10.1016/j.nmd.2019.12.005] [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: 07/09/2019] [Revised: 12/09/2019] [Accepted: 12/16/2019] [Indexed: 12/19/2022]
Abstract
Fingerprint bodies are observed in a variety of clinical situations with no definite genetic cause identified so far. We report for the first time the association of fingerprint bodies with rods in a patient who developed a slowly progressive myopathy affecting the face and limb extremities. Ultrastructural examination first disclosed fingerprint bodies and on a second biopsy, associated cytoplasmic bodies and rods. Next Generation Sequencing panel of congenital nemaline myopathy genes allowed the identification of two novel variants, a deleterious missense variant (c.1628G>T, p.Arg543Leu) located in the WASP-homology 2 domain, and a deletion (c.366delG, p.Lys122AsnFs*6) in the LMOD3 gene, generally causing severe nemaline myopathy with antenatal onset and early death. Recently, a less severe phenotype similar to our case has been reported. Our study confirms the existence of milder phenotypes linked to LMOD3 mutations and underlines that fingerprint bodies, though not specific, may be an early ultrastructural marker that could be linked, among others, to nemaline myopathy.
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Affiliation(s)
- Florent Marguet
- Department of Pathology, Normandie University, UNIROUEN, INSERM U1245, Rouen University Hospital, F76000 Rouen, France
| | - John Rendu
- Grenoble Institut Neurosciences, University of Grenoble Alpes, Inserm, U1216, CHU Grenoble Alpes, 38000 Grenoble, France
| | - Catherine Vanhulle
- Department of Neonatal Pediatrics and Intensive Care, Rouen University Hospital, F76000 Rouen, France
| | | | - Anne Claire Brehin
- Department of Medical Genetics, Rouen University Hospital, F76000 Rouen, France
| | - Julien Fauré
- Grenoble Institut Neurosciences, University of Grenoble Alpes, Inserm, U1216, CHU Grenoble Alpes, 38000 Grenoble, France
| | - Annie Laquerrière
- Department of Pathology, Normandie University, UNIROUEN, INSERM U1245, Rouen University Hospital, F76000 Rouen, France.
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11
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Wang Y, Zhu C, Du L, Li Q, Lin MF, Férec C, Cooper DN, Chen JM, Zhou Y. Compound Heterozygosity for Novel Truncating Variants in the LMOD3 Gene as the Cause of Polyhydramnios in Two Successive Fetuses. Front Genet 2019; 10:835. [PMID: 31572445 PMCID: PMC6753228 DOI: 10.3389/fgene.2019.00835] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 08/13/2019] [Indexed: 01/03/2023] Open
Abstract
Polyhydramnios is sometimes associated with genetic defects. However, establishing an accurate diagnosis and pinpointing the precise genetic cause of polyhydramnios in any given case represents a major challenge because it is known to occur in association with over 200 different conditions. Whole exome sequencing (WES) is now a routine part of the clinical workup, particularly with diseases characterized by atypical manifestations and significant genetic heterogeneity. Here we describe the identification, by means of WES, of novel compound heterozygous truncating variants in the LMOD3 gene [i.e., c.1412delA (p.Lys471Serfs*18) and c.1283dupC (p.Gly429Trpfs*35)] in a Chinese family with two successive fetuses affected with polyhydramnios, thereby potentiating the prenatal diagnosis of nemaline myopathy (NM) in the proband. LMOD3 encodes leiomodin-3, which is localized to the pointed ends of thin filaments and acts as a catalyst of actin nucleation in skeletal and cardiac muscle. This is the first study to describe the prenatal and postnatal manifestations of LMOD3-related NM in the Chinese population. Of all the currently reported NM-causing LMOD3 nonsense and frameshifting variants, c.1412delA generates the shortest truncation at the C-terminal end of the protein, underscoring the critical role of the WH2 domain in LMOD3 structure and function. Survey of the prenatal phenotypes of all known LMOD3-related severe NM cases served to identify fetal edema as a novel presenting feature that may provide an early clue to facilitate prenatal diagnosis of the disease.
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Affiliation(s)
- Ye Wang
- Fetal Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Caixia Zhu
- Fetal Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Liu Du
- Department of Ultrasonic Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Qiaoer Li
- Jiangmen Central Hospital, Affiliated Jiangmen Hospital of Sun Yat-Sen University, Jiangmen, China
| | - Mei-Fang Lin
- Department of Ultrasonic Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Claude Férec
- EFS, Univ Brest, Inserm, UMR 1078, GGB, Brest, France.,CHU Brest, Service de Génétique, Brest, France
| | - David N Cooper
- Institute of Medical Genetics, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Jian-Min Chen
- EFS, Univ Brest, Inserm, UMR 1078, GGB, Brest, France
| | - Yi Zhou
- Fetal Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
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12
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Abstract
The congenital myopathies form a large clinically and genetically heterogeneous group of disorders. Currently mutations in at least 27 different genes have been reported to cause a congenital myopathy, but the number is expected to increase due to the accelerated use of next-generation sequencing methods. There is substantial overlap between the causative genes and the clinical and histopathologic features of the congenital myopathies. The mode of inheritance can be autosomal recessive, autosomal dominant or X-linked. Both dominant and recessive mutations in the same gene can cause a similar disease phenotype, and the same clinical phenotype can also be caused by mutations in different genes. Clear genotype-phenotype correlations are few and far between.
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Affiliation(s)
- Katarina Pelin
- Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland; The Folkhälsan Institute of Genetics, Folkhälsan Research Center, and Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland.
| | - Carina Wallgren-Pettersson
- The Folkhälsan Institute of Genetics, Folkhälsan Research Center, and Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
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13
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Gonorazky HD, Dowling JJ, Volpatti JR, Vajsar J. Signs and Symptoms in Congenital Myopathies. Semin Pediatr Neurol 2019; 29:3-11. [PMID: 31060723 DOI: 10.1016/j.spen.2019.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Congenital myopathies (CM) represent a continuously growing group of disorders with a wide range of clinical and histopathologic presentations. The refinement and application of new technologies for genetic diagnosis have broadened our understanding of the genetic causes of CM. Our growing knowledge has revealed that there are no clear limits between each subgroup of CM, and thus the clinical overlap between genes has become more evident. The implementation of next generation sequencing has produced vast amounts of genomic data that may be difficult to interpret. With an increasing number of reports revealing variants of unknown significance, it is essential to support the genetic diagnosis with a well characterized clinical description of the patient. Phenotype-genotype correlation should be a priority at the moment of disclosing the genetic results. Thus, a detailed physical examination can provide us with subtle differences that are not only key in order to arrive at a correct diagnosis, but also in the characterization of new myopathies and candidate genes.
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Affiliation(s)
- Hernan D Gonorazky
- Division of Neurology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - James J Dowling
- Division of Neurology, The Hospital for Sick Children, Toronto, Ontario, Canada; Department of Molecular Genetics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Jonathan R Volpatti
- Department of Molecular Genetics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Jiri Vajsar
- Division of Neurology, The Hospital for Sick Children, Toronto, Ontario, Canada.
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Schatz UA, Weiss S, Wenninger S, Schoser B, Muss WH, Bittner RE, Schmidt WM, Schossig AS, Rudnik-Schöneborn S, Baumann M. Evidence of mild founder LMOD3 mutations causing nemaline myopathy 10 in Germany and Austria. Neurology 2018; 91:e1690-e1694. [PMID: 30291184 DOI: 10.1212/wnl.0000000000006428] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 07/19/2018] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVE To expand the clinical and genetic spectrum of nemaline myopathy 10 by a series of Austrian and German patients with a milder disease course and missense mutations in LMOD3. METHODS We characterized the clinical features and the genetic status of 4 unrelated adolescent or adult patients with nemaline myopathy. RESULTS The 4 patients showed a relatively mild disease course. They all have survived into adulthood, 3 of 4 have remained ambulatory, and all showed marked facial weakness. Muscle biopsy specimens gave evidence of nemaline bodies. All patients were unrelated but originated from Austria (Tyrol and Upper Austria) and Southern Germany (Bavaria). All patients carried the missense variant c.1648C>T, p.(Leu550Phe) in the LMOD3 gene, either on both alleles or in trans with another missense variant (c.1004A>G, p.Gln335Arg). Both variants were not reported previously. CONCLUSIONS In 2014, a severe form of congenital nemaline myopathy caused by disrupting mutations in LMOD3 was identified and denoted as NEM10. Unlike the previously reported patients, who had a severe clinical picture with a substantial risk of early death, our patients showed a relatively mild disease course. As the missense variant c.1648C>T is located further downstream compared to all previously published LMOD3 mutations, it might be associated with higher protein expression compared to the reported loss-of-function mutations. The apparent clusters of 2 mild mutations in Germany and Austria in 4 unrelated families may be explained by a founder effect.
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Affiliation(s)
- Ulrich A Schatz
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.)
| | - Simone Weiss
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.)
| | - Stephan Wenninger
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.)
| | - Benedikt Schoser
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.)
| | - Wolfgang H Muss
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.)
| | - Reginald E Bittner
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.)
| | - Wolfgang M Schmidt
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.)
| | - Anna S Schossig
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.)
| | - Sabine Rudnik-Schöneborn
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.)
| | - Matthias Baumann
- From the Department of Human Genetics (UA.S., AS.S., S.R.), Department of Pediatrics (M.B.), Medical University Innsbruck, Austria; Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria (S.W.); Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University Munich, Germany (St.W., B.S.); Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität Munich, Germany (UA.S., AS.S.); Institute of Pathology, SALK-LKH and PMU (Paracelsus Medical University) Salzburg, Austria (WH.M, retired); Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Austria (RE.B., WM.S.).
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15
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Chervinsky E, Khayat M, Soltsman S, Habiballa H, Elpeleg O, Shalev S. A homozygous TTN
gene variant associated with lethal congenital contracture syndrome. Am J Med Genet A 2018; 176:1001-1005. [DOI: 10.1002/ajmg.a.38639] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 01/14/2018] [Accepted: 01/21/2018] [Indexed: 01/15/2023]
Affiliation(s)
| | - Morad Khayat
- Genetics Institute, Emek Medical Center; Afula Israel
| | - Sofia Soltsman
- Maternal Fetal Medicine Outpatient Clinic, Department of Obstetrics and Gynecology; Baruch Padeh Medical Center; Poriya Israel
- Faculty of Medicine in the Galilee; Bar-Ilan University; Safed Israel
| | | | - Orly Elpeleg
- The Monique and Jacques Roboh Department of Genetic Research; Hadassah-Hebrew University Medical Center; Jerusalem Israel
| | - Stavit Shalev
- Genetics Institute, Emek Medical Center; Afula Israel
- Rappaport Faculty of Medicine; Technion - Israel Institute of Technology; Haifa Israel
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