The genetic basis of undiagnosed muscular dystrophies and myopathies

Marco Savarese, Giuseppina Di Fruscio, Annalaura Torella, Chiara Fiorillo, Francesca Magri, Marina Fanin, Lucia Ruggiero, Giulia Ricci, Guja Astrea, L. Passamano, Alessandra Ruggieri, Dario Ronchi, Giorgio Tasca, Adele D'Amico, S. Janssens, Olimpia Farina, Margherita Mutarelli, Veer Singh Marwah, Arcomaria Garofalo, Teresa GiuglianoSimone Sanpaolo, F. Del Vecchio Blanco, Gaia Esposito, Giulio Piluso, Paola D'Ambrosio, Roberta Petillo, Olimpia Musumeci, C. Rodolico, S. Messina, A. Evilä, Peter Hackman, Massimiliano Filosto, G. Di Iorio, Gabriele Siciliano, Marina Mora, Lorenzo Maggi, Carlo Minetti, S. Sacconi, Lucio Santoro, K. B M Claes, Liliana Vercelli, T. Mongini, Enzo Ricci, Francesca Gualandi, Rossella Tupler, J. L. De Bleecker, Bjarne Udd, Antonio Toscano, Maurizio Gualtiero Moggio, E. Pegoraro, Enrico Silvio Bertini, E. Mercuri, Corrado Angelini, Filippo Maria Santorelli, L. Politano, Claudio Bruno, Giacomo Pietro Comi, Vincenzo Nigro

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: To apply next-generation sequencing (NGS) for the investigation of the genetic basis of undiagnosed muscular dystrophies and myopathies in a very large cohort of patients. Methods: We applied an NGS-based platform namedMotorPlex to our diagnostic workflow to test muscle disease genes with a high sensitivity and specificity for small DNA variants. We analyzed 504 undiagnosed patients mostly referred as being affected by limb-girdle muscular dystrophy or congenital myopathy. Results: MotorPlex provided a complete molecular diagnosis in 218 cases (43.3%). A further 160 patients (31.7%) showed as yet unproven candidate variants. Pathogenic variants were found in 47 of 93 genes, and in more than 30%of cases, the phenotype was nonconventional, broadening the spectrum of disease presentation in at least 10 genes. Conclusions: Our large DNA study of patients with undiagnosed myopathy is an example of the ongoing revolution in molecular diagnostics, highlighting the advantages in using NGS as a first-tier approach for heterogeneous genetic conditions.

Original languageEnglish
Pages (from-to)71-76
Number of pages6
JournalNeurology
Volume87
Issue number1
DOIs
Publication statusPublished - Jul 5 2016

ASJC Scopus subject areas

  • Clinical Neurology

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