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Rippling muscle disease and cardiomyopathy associated with a mutation in the CAV3 gene

Michela Catteruccia1, Tommaso Sanna, Filippo Maria Santorelli

  • 1Department of Neuroscience, Institute of Neurology, Catholic University, Largo Agostino Gemelli 8, 00168 Rome, Italy.

Neuromuscular Disorders : NMD
|September 24, 2009
PubMed

Insights

Mutations in the CAV3 gene cause rippling muscle disease and heart problems. This study identified the p.A46V mutation in a family, highlighting the need for cardiac evaluation in myopathic patients.

Area of Science:

  • Genetics
  • Molecular Biology
  • Cardiology

Background:

  • Caveolin-3 (encoded by CAV3) is crucial in muscle and heart function.
  • CAV3 mutations cause diverse neuromuscular and cardiac disorders.
  • Phenotypic variability suggests different molecular interactions in skeletal muscle and heart.

Purpose of the Study:

  • To investigate a family with rippling muscle disease and cardiac involvement.
  • To identify the genetic cause of the observed phenotypes.
  • To emphasize the importance of cardiac assessment in CAV3-related myopathies.

Main Methods:

  • Clinical and neurophysiological evaluation.
  • Muscle biopsy with caveolin-3 immunosignal assessment.
  • Molecular genetic analysis of the CAV3 gene.

Main Results:

  • An Italian family presented with rippling muscle disease and cardiac issues (conduction defects, dilated cardiomyopathy).
  • Muscle biopsies revealed a loss of caveolin-3.
  • The p.A46V mutation in CAV3 was identified, previously linked to autosomal dominant rippling muscle disease.

Conclusions:

  • The p.A46V CAV3 mutation can cause both skeletal muscle and cardiac dysfunction.
  • Cardiac involvement in CAV3-related myopathies may be underdiagnosed.
  • Thorough cardiac evaluation is recommended for patients with CAV3 mutations to detect potentially lethal arrhythmias and cardiomyopathy.

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