TMEM5-associated dystroglycanopathy presenting with CMD and mild limb-girdle muscle involvement

Guja Astrea, Ilaria Pezzini, Ester Picillo, Rosa Pasquariello, Francesca Moro, Manuela Ergoli, Paola D'Ambrosio, Adele D'Amico, Luisa Politano, Filippo Maria Santorelli

Research output: Contribution to journalArticlepeer-review

Abstract

The dystroglycanopathies, which are caused by reduced glycosylation of alpha-dystroglycan, are a heterogeneous group of neurodegenerative disorders characterized by variable brain and skeletal muscle involvement. Recently, mutations in TMEM5 have been described in severe dystroglycanopathies. We present the clinical, molecular and neuroimaging features of an Italian boy who had delayed developmental milestones with mild limb-girdle muscle involvement, bilateral frontotemporal polymicrogyria, moderate intellectual disability, and no cerebellar involvement. He also presented a cochlear dysplasia and harbored a reported mutation (p.A47Rfs*42) in TMEM5, detected using targeted next-generation sequencing. The relatively milder muscular phenotype and associated structural brain abnormalities distinguish this case from previously reported patients with severe dystroglycanopathies and expand the spectrum of TMEM5-associated disorders.

Original languageEnglish
JournalNeuromuscular Disorders
DOIs
Publication statusAccepted/In press - Oct 10 2015

Keywords

  • Cochlear dysplasia
  • Congenital muscular dystrophy
  • Limb-girdle muscle weakness
  • Polymicrogyria
  • TMEM5

ASJC Scopus subject areas

  • Clinical Neurology
  • Pediatrics, Perinatology, and Child Health
  • Genetics(clinical)
  • Neurology

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