Next generation sequencing on patients with LGMD and nonspecific myopathies: Findings associated with ANO5 mutations

Enzo Ricci, Giorgio Tasca, Marco Savarese, Giuseppina Di Fruscio, Lucia Ruggiero, Sandra Janssens, Jan De Bleecker, Marc Delpech, Olimpia Musumeci, Antonio Toscano, Corrado Angelini, Sabrina Sacconi, Lucio Santoro, Kathleen Claes, Luisa Politano, Vincenzo Nigro

Risultato della ricerca: Contributo in rivistaArticolo in rivista

47 Citazioni (Scopus)

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.
Lingua originaleEnglish
pagine (da-a)533-541
Numero di pagine9
RivistaNeuromuscular Disorders
DOI
Stato di pubblicazionePubblicato - 2015

Keywords

  • LGMD2L
  • Next generation sequencing

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