Two amino-acid substitutions in the myelin protein zero gene of a case of Charcot-Marie-Tooth disease associated with light-near dissociation

Neuromuscul Disord. 2002 Mar;12(3):281-5. doi: 10.1016/s0960-8966(01)00281-4.

Abstract

Charcot-Marie-Tooth disease caused by mutations of the myelin protein zero gene demonstrates considerable phenotypical variability. We describe a 45-year-old female with a peripheral neuropathy with demyelinating and axonal features, pes cavus and pupillary light-near dissociation. She was heterozygous for two mutations in the myelin protein zero gene (His81Tyr and Val113Phe), both present on the same allele. Our patient shows a less severe phenotype than previously described patients with a His81Arg mutation. Multiple mutations in the myelin protein zero gene, as well as Charcot-Marie-Tooth with pupillary abnormalities have previously been described in rare instances. However, concurrent occurrence of both phenomena is a novel finding.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Amino Acid Substitution
  • Charcot-Marie-Tooth Disease / complications
  • Charcot-Marie-Tooth Disease / genetics*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Myelin P0 Protein / chemistry
  • Myelin P0 Protein / genetics*
  • Neural Conduction
  • Phenotype
  • Protein Structure, Tertiary
  • Pupil Disorders / etiology
  • Pupil Disorders / genetics*
  • Reflex, Pupillary

Substances

  • Myelin P0 Protein