Genetic analysis of the dystrophin gene in children with Duchenne and Becker muscular dystrophies

Muscle Nerve. 2017 Jul;56(1):117-121. doi: 10.1002/mus.25435. Epub 2017 Feb 3.

Abstract

Introduction: Duchenne and Becker muscular dystrophies (DMD and BMD) are X-linked myopathies caused by mutations of the dystrophin gene.

Methods: Multiplex ligation-dependent probe amplification (MLPA) combined with next-generation sequencing (NGS) of the exons of the dystrophin gene were performed in 92 suspected DMD/BMD patients. Patients with negative results were subjected to additional muscle diseases panel tests.

Results: DNA rearrangements were detected in 65 (70.65%) patients using MLPA. The deletions primarily clustered at exons 45-55, followed by exons 2-19. The duplication locations were in contrast to previous studies, which involved the 3' end of the gene. A total of 21 cases with point mutations were detected by NGS analysis. Furthermore, 6 previously unreported mutations were detected. Limb-girdle muscular dystrophy was confirmed in 2 patients after analysis with the muscle diseases panel.

Conclusions: MLPA combined with NGS was effective for detection of the mutations in dystrophin gene exons. Muscle Nerve 56: 117-121, 2017.

Keywords: Duchenne/Becker muscular dystrophies; MLPA; Sanger sequencing; muscle diseases panel; new mutation; next-generation sequencing.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Child
  • Child, Preschool
  • Computational Biology
  • Dystrophin / genetics*
  • Exons / genetics
  • Genetic Association Studies
  • Humans
  • Male
  • Muscular Dystrophy, Duchenne / genetics*
  • Mutation / genetics*
  • Retrospective Studies

Substances

  • Dystrophin