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Calpain-3 mutations in Turkey.

Burcu Balci1, Stefania Aurino, Göknur Haliloglu

  • 1Faculty of Medicine, Department of Medical Biology, Hacettepe University, 6th floor, (06100), Sihhiye, Ankara, Turkey.

European Journal of Pediatrics
|January 18, 2006
PubMed
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Autosomal recessive limb-girdle muscular dystrophies (LGMD2s) are a group of genetic muscle disorders. This study identified CAPN3 gene mutations in 22.6% of Turkish LGMD2 families, revealing novel mutations and common variants for diagnostics.

Area of Science:

  • Genetics
  • Neurology
  • Molecular Biology

Background:

  • Autosomal recessive limb-girdle muscular dystrophies (LGMD2s) are a heterogeneous group of inherited muscle disorders.
  • Calpainopathies (LGMD2A), caused by CAPN3 gene mutations, are a common subtype of LGMD2.
  • LGMD2A presents with variable muscle weakness and elevated creatine kinase (CK) levels.

Purpose of the Study:

  • To investigate the genetic basis of LGMD2 in Turkish families.
  • To identify mutations in the CAPN3 gene associated with LGMD2A.
  • To analyze the spectrum and frequency of CAPN3 mutations in the Turkish population.

Main Methods:

  • Screening of 93 unrelated families with suspected LGMD2.
  • Genetic analysis of the CAPN3 gene to detect mutations.

Related Experiment Videos

  • Comparison of identified mutations with previously reported variants.

    • Main Results:

    • LGMD2A was diagnosed in 29 out of 93 families (31.2%).
    • Mutations in the CAPN3 gene were identified in 21 of these LGMD2A families (72.4% of LGMD2A cases, 22.6% of all LGMD2 families).
    • Six novel mutations (p.K211N, p.D230G, p.Y322H, p.R698S, p.Q738X, c.2257delGinsAA) and nine known mutations were detected. Specific mutations (c.550delA and p.R490Q) showed high frequency.

    Conclusions:

    • The CAPN3 gene is a significant cause of LGMD2A in Turkey.
    • The identification of novel and recurrent mutations aids in understanding the genetic landscape of LGMD2A.
    • Specific mutation frequencies can inform diagnostic strategies for LGMD2A in the Turkish population.