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Savarese M, Di Fruscio G, Tasca G, Ruggiero L, Janssens S, De Bleecker J, Delpech M, Musumeci O, Toscano A, Angelini C, Sacconi S, Santoro L, Ricci E, Claes K, Politano L, Nigro V. Next generation sequencing on patients with LGMD and nonspecific myopathies: Findings associated with ANO5 mutations. Neuromuscul Disord 2015; 25:533-41. [PMID: 25891276 PMCID: PMC4502439 DOI: 10.1016/j.nmd.2015.03.011] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 03/24/2015] [Accepted: 03/25/2015] [Indexed: 11/30/2022]
Abstract
We studied 786 undiagnosed patients with LGMD or nonspecific myopathic features to investigate the role of ANO5 mutations in limb-girdle muscular dystrophies (LGMDs) and in nonspecific myopathies using the next generation sequencing (NGS) approach. In 160 LGMD patients, we first sequenced hotspot exons 5 and 20 and then sequenced the remaining part of the coding region. Another 626 patients, recruited using broader inclusion criteria, were directly analyzed by targeted NGS. By combining NGS and Sanger sequencing, we identified 33/786 (4%) patients carrying putative pathogenic changes in both alleles and 23 ANO5 heterozygotes (3%). The phenotypic spectrum is broader than expected, from hyperCKemia to myopathies, with lack of genotype/phenotype correlations. In particular, this is currently the largest screening of the ANO5 gene. The large number of heterozygotes for damaging mutations suggests that anoctaminopathies should be frequent and often nonpenetrant. We propose the multiple genetic testing by targeted NGS as a first step to analyze patients with nonspecific myopathic presentations. This represents a straightforward approach to overcome the difficulties of clinical heterogeneity of ANO5 patients, and to test, at the same time, many other genes involved in neuromuscular disorders.
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Affiliation(s)
- Marco Savarese
- Telethon Institute of Genetics and Medicine, Pozzuoli (NA), Italy; Dipartimento di Biochimica, Biofisica e Patologia Generale, Seconda Università di Napoli, Napoli, Italy
| | - Giuseppina Di Fruscio
- Telethon Institute of Genetics and Medicine, Pozzuoli (NA), Italy; Dipartimento di Biochimica, Biofisica e Patologia Generale, Seconda Università di Napoli, Napoli, Italy
| | | | - Lucia Ruggiero
- Dipartimento di Neuroscienze e Scienze riproduttive ed odontostomatologiche, Università di Napoli "Federico II", Napoli, Italy
| | - Sandra Janssens
- Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
| | - Jan De Bleecker
- Department of Neurology, Ghent University Hospital, Ghent, Belgium
| | - Marc Delpech
- Biochimie et génétique moléculaire, Centre hospitalier Cochin, Paris, France
| | - Olimpia Musumeci
- Dipartimento di Neuroscienze, Università di Messina, Messina, Italy
| | - Antonio Toscano
- Dipartimento di Neuroscienze, Università di Messina, Messina, Italy
| | - Corrado Angelini
- Dipartimento di Neuroscienze, Università di Padova, Padova, Italy
| | - Sabrina Sacconi
- Centre de Référence Maladies Neuromusculaires - SLA, Hôpital Archet 1, CHU de Nice, Nice, France
| | - Lucio Santoro
- Dipartimento di Neuroscienze e Scienze riproduttive ed odontostomatologiche, Università di Napoli "Federico II", Napoli, Italy
| | | | - Kathleen Claes
- Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
| | - Luisa Politano
- Dipartimento di Medicina Sperimentale, Seconda Università di Napoli, Napoli, Italy
| | - Vincenzo Nigro
- Telethon Institute of Genetics and Medicine, Pozzuoli (NA), Italy; Dipartimento di Biochimica, Biofisica e Patologia Generale, Seconda Università di Napoli, Napoli, Italy.
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Eymard B, Ferreiro A, Ben Yaou R, Stojkovic T. Muscle diseases with prominent joint contractures: Main entities and diagnostic strategy. Rev Neurol (Paris) 2013; 169:546-63. [DOI: 10.1016/j.neurol.2013.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 07/23/2013] [Accepted: 07/24/2013] [Indexed: 01/13/2023]
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Maladies musculaires en réanimation. Quand les évoquer ? Comment orienter la recherche diagnostique ? MEDECINE INTENSIVE REANIMATION 2012. [DOI: 10.1007/s13546-012-0515-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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