Limb-girdle muscular dystrophy type 2A resulting from homozygous G2338C transversion mutation in the calpain-3 gene

J Clin Neuromuscul Dis. 2010 Dec;12(2):62-5. doi: 10.1097/CND.0b013e3181f3dbd3.

Abstract

Limb-girdle muscular dystrophy represents a clinically and genetically heterogeneous group of myopathies. Limb-girdle muscular dystrophy Type 2A, which is transmitted in an autosomal-recessive pattern, is caused by mutations in the calpain-3 (CAPN3) gene. A number of mutations have been reported in patients from throughout the world but not in the Asian-Indian population. We describe a genotype/phenotype analysis of an Asian-Indian patient with a history, neurologic examination, and investigations consistent with muscular dystrophy. Genetic analysis of this patient showed a homozygous G2338C transversion resulting in an amino acid change from aspartic acid 780 histidine in the CAPN3 gene confirming Limb-girdle muscular dystrophy Type 2A. Subsequent testing of the patient's family revealed that his parents and sister were heterozygous unaffected carriers. The G2338C transversion was detected as a compound heterozygous mutation in one patient in Germany. We report a homozygous case and expand the clinical spectrum of limb-girdle muscular dystrophy Type 2A to include Asian-Indians.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Asian People / genetics
  • Calpain / deficiency*
  • Calpain / genetics*
  • Female
  • Genetic Predisposition to Disease / genetics
  • Homozygote*
  • Humans
  • Male
  • Middle Aged
  • Muscle Proteins / deficiency*
  • Muscle Proteins / genetics*
  • Muscular Dystrophies, Limb-Girdle / diagnosis
  • Muscular Dystrophies, Limb-Girdle / ethnology
  • Muscular Dystrophies, Limb-Girdle / genetics*
  • Pedigree
  • Point Mutation / genetics*

Substances

  • Muscle Proteins
  • CAPN3 protein, human
  • Calpain

Supplementary concepts

  • Limb-girdle muscular dystrophy type 2A