Phenotypic spectrum associated with mutations in the fukutin-related protein gene

Ann Neurol. 2003 Apr;53(4):537-42. doi: 10.1002/ana.10559.

Abstract

We describe 22 patients with mutations in the fukutin-related protein (FKPR) gene. Four patients had congenital muscular dystrophy (MDC1C), with presentation at birth, severe weakness and inability to stand unsupported. The other 18 had limb girdle muscular dystrophy (LGMD2I). Eleven showed a Duchenne-like course with loss of ambulation in the early teens while 7 had a milder phenotype. Muscle biopsy invariably showed abnormal expression of a-dystroglycan. MDC1C patients either carried 2 missense or 1 missense and 1 nonsense mutations. Patients with LGMD2I shared a common mutation (C826A,Leu276Ileu) and their phenotypic severity was correlated with the second allelic mutation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Age of Onset
  • Biopsy
  • Brain / pathology
  • Child
  • Child, Preschool
  • Cytoskeletal Proteins / genetics
  • Dystroglycans
  • Female
  • Humans
  • Hypoventilation / genetics
  • Membrane Glycoproteins / genetics
  • Muscle, Skeletal / pathology
  • Muscular Dystrophies / genetics*
  • Muscular Dystrophies / pathology*
  • Muscular Dystrophy, Duchenne / genetics
  • Muscular Dystrophy, Duchenne / pathology
  • Mutation, Missense
  • Pentosyltransferases
  • Peripheral Nervous System / pathology
  • Phenotype
  • Proteins / genetics*
  • Severity of Illness Index
  • Ventricular Dysfunction, Left / genetics

Substances

  • Cytoskeletal Proteins
  • DAG1 protein, human
  • Membrane Glycoproteins
  • Proteins
  • Dystroglycans
  • FKRP protein, human
  • Pentosyltransferases