Unusual multisystemic involvement and a novel BAG3 mutation revealed by NGS screening in a large cohort of myofibrillar myopathies
| العنوان: | Unusual multisystemic involvement and a novel BAG3 mutation revealed by NGS screening in a large cohort of myofibrillar myopathies |
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| المؤلفون: | Peter Van den Bergh, Sabrina Sacconi, Andreas Ferbert, Matthias Vorgerd, Markus Bergmann, Jörg B. Schulz, Joachim Weis, Jean-Jacques Martin, Marcus Deschauer, J Elisa Bach, Peter De Jonghe, Jan Bürmann, Wolfram Kress, Kristl G. Claeys, Eva Neuen-Jacob, J. Michael Schröder, Anna-Lena Semmler, Rudolf A. Kley, Claus Liebe, Roland Anderheiden, Oliver J. Müller |
| المساهمون: | Institut de Biologie Valrose (IBV), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), UCL - SSS/IONS/NEUR - Clinical Neuroscience, UCL - (SLuc) Service de neurologie |
| المصدر: | Orphanet Journal of Rare Diseases Orphanet Journal of Rare Diseases, BioMed Central, 2014, 9 (1), pp.121 Orphanet Journal of Rare Diseases, Vol. 9, p. 121 [1-13] (2014) Orphanet journal of rare diseases 9(1), 121 (2014). doi:10.1186/s13023-014-0121-9 Orphanet journal of rare diseases Orphanet journal of rare diseases 9, 121 (2014). doi:10.1186/s13023-014-0121-9 |
| بيانات النشر: | HAL CCSD, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Male, Pathology, bcl-2 associated athanogene protein 3, 610 Medical sciences Medicine, 0302 clinical medicine, Genetics(clinical), Pharmacology (medical), FLNC, [SDV.BDD]Life Sciences [q-bio]/Development Biology, Genetics (clinical), Genetics, Medicine(all), 0303 health sciences, medicine.diagnostic_test, High-Throughput Nucleotide Sequencing, General Medicine, Middle Aged, Phenotype, Pedigree, 3. Good health, Mutation (genetic algorithm), Female, Protein aggregation, Polyneuropathy, Myopathies, Structural, Congenital, Adult, medicine.medical_specialty, Adolescent, Next generation sequencing, Biology, MFM, Hearing impairment, Young Adult, 03 medical and health sciences, medicine, Humans, ddc:610, Muscle, Skeletal, Gene, Adaptor Proteins, Signal Transducing, Aged, 030304 developmental biology, Nerve biopsy, Genetic heterogeneity, Research, medicine.disease, Human genetics, Mutation, Human medicine, Apoptosis Regulatory Proteins, 030217 neurology & neurosurgery |
| الوصف: | Background Myofibrillar myopathies (MFM) are a group of phenotypically and genetically heterogeneous neuromuscular disorders, which are characterized by protein aggregations in muscle fibres and can be associated with multisystemic involvement. Methods We screened a large cohort of 38 index patients with MFM for mutations in the nine thus far known causative genes using Sanger and next generation sequencing (NGS). We studied the clinical and histopathological characteristics in 38 index patients and five additional relatives (n = 43) and particularly focused on the associated multisystemic symptoms. Results We identified 14 heterozygous mutations (diagnostic yield of 37%), among them the novel p.Pro209Gln mutation in the BAG3 gene, which was associated with onset in adulthood, a mild phenotype and an axonal sensorimotor polyneuropathy, in the absence of giant axons at the nerve biopsy. We revealed several novel clinical phenotypes and unusual multisystemic presentations with previously described mutations: hearing impairment with a FLNC mutation, dysphonia with a mutation in DES and the first patient with a FLNC mutation presenting respiratory insufficiency as the initial symptom. Moreover, we described for the first time respiratory insufficiency occurring in a patient with the p.Gly154Ser mutation in CRYAB. Interestingly, we detected a polyneuropathy in 28% of the MFM patients, including a BAG3 and a MYOT case, and hearing impairment in 13%, including one patient with a FLNC mutation and two with mutations in the DES gene. In four index patients with a mutation in one of the MFM genes, typical histological findings were only identified at the ultrastructural level (29%). Conclusions We conclude that extraskeletal symptoms frequently occur in MFM, particularly cardiac and respiratory involvement, polyneuropathy and/or deafness. BAG3 mutations should be considered even in cases with a mild phenotype or an adult onset. We identified a genetic defect in one of the known genes in less than half of the MFM patients, indicating that more causative genes are still to be found. Next generation sequencing techniques should be helpful in achieving this aim. |
| وصف الملف: | application/pdf; pdf |
| اللغة: | English |
| تدمد: | 1750-1172 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb47c88657f1d9f8b9fc70a4ba9888e7Test https://hal.archives-ouvertes.fr/hal-01117408Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....bb47c88657f1d9f8b9fc70a4ba9888e7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17501172 |
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