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New massive parallel sequencing approach improves the genetic characterization of congenital myopathies.

Abstract：

:Congenital myopathies (CMs) are a heterogeneous group of muscle diseases characterized by hypotonia, delayed motor skills and muscle weakness with onset during the first years of life. The diagnostic workup of CM is highly dependent on the interpretation of the muscle histology, where typical pathognomonic findings are suggestive of a CM but are not necessarily gene specific. Over 20 loci have been linked to these myopathies, including three exceptionally large genes (TTN, NEB and RYR1), which are a challenge for molecular diagnosis. We developed a new approach using massive parallel sequencing (MPS) technology to simultaneously analyze 20 genes linked to CMs. Assay design was based on the Ion AmpliSeq strategy and sequencing runs were performed on an Ion PGM system. A total of 12 patients were analyzed in this study. Among the 2534 variants detected, 14 pathogenic mutations were successfully identified in the DNM2, NEB, RYR1, SEPN1 and TTN genes. Most of these had not been documented and/or fully characterized, hereby contributing to expand the CM mutational spectrum. The utility of this approach was demonstrated by the identification of mutations in 70% of the patients included in this study, which is relevant for CMs especially considering its wide phenotypic and genetic heterogeneity.

journal_name

J Hum Genet

journal_title

Journal of human genetics

authors

Oliveira J,Gonçalves A,Taipa R,Melo-Pires M,Oliveira ME,Costa JL,Machado JC,Medeiros E,Coelho T,Santos M,Santos R,Sousa M

doi

10.1038/jhg.2016.2

subject

Has Abstract

pub_date

2016-06-01 00:00:00

pages

497-505

issue

6

eissn

1434-5161

issn

1435-232X

pii

jhg20162

journal_volume

61

pub_type

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