Novel FLNC mutation in a patient with myofibrillar myopathy in combination with late-onset cerebellar ataxia

Muscle Nerve. 2012 Aug;46(2):275-82. doi: 10.1002/mus.23349.

Abstract

Introduction: Mutations in the gene that encodes filamin C, FLNC, represent a rare cause of a distinctive type of myofibrillar myopathy (MFM).

Methods: We investigated an Italian patient by means of muscle biopsy, muscle and brain imaging and molecular analysis of MFM genes.

Results: The patient harbored a novel 7256C>T, p.Thr2419Met mutation in exon 44 of FLNC. Clinical, pathological and muscle MRI findings were similar to the previously described filaminopathy cases. This patient had, in addition, cerebellar ataxia with atrophy of cerebellum and vermis evident on brain MRI scan. Extensive screening failed to establish a cause of cerebellar atrophy.

Conclusions: We report an Italian filaminopathy patient, with a novel mutation in a highly conserved region. This case raises the possibility that the disease spectrum caused by FLNC may include cerebellar dysfunction.

Publication types

  • Case Reports
  • Research Support, N.I.H., Intramural

MeSH terms

  • Aged
  • Contractile Proteins / genetics*
  • Filamins
  • Humans
  • Male
  • Microfilament Proteins / genetics*
  • Muscle, Skeletal / pathology
  • Muscular Dystrophies / complications
  • Muscular Dystrophies / genetics*
  • Muscular Dystrophies / pathology
  • Spinocerebellar Degenerations / complications
  • Spinocerebellar Degenerations / genetics*
  • Spinocerebellar Degenerations / pathology

Substances

  • Contractile Proteins
  • FLNC protein, human
  • Filamins
  • Microfilament Proteins

Supplementary concepts

  • Filaminopathy, autosomal dominant