Posterior column ataxia with retinitis pigmentosa in a Japanese family with a novel mutation in FLVCR1

Neurogenetics. 2011 May;12(2):117-21. doi: 10.1007/s10048-010-0271-4. Epub 2011 Jan 26.

Abstract

Posterior column ataxia with retinitis pigmentosa (PCARP) is an autosomal recessive neurodegenerative disorder characterized by retinitis pigmentosa and sensory ataxia. Previous studies of PCARP in two families showed a linkage to 1q31-q32. However, detailed investigations on the clinical presentations as well as molecular genetics of PCARP have been limited. Here, we describe a Japanese consanguineous family with PCARP. Two affected siblings suffered from childhood-onset retinitis pigmentosa and slowly progressive sensory ataxia. They also showed mild mental retardation, which has not been described in patients with PCARP. Parametric linkage analysis using high-density single nucleotide polymorphism arrays supported a linkage to the same locus. Target capture and high-throughput sequencing technologies revealed a novel homozygous c.1477G>C (G493R) mutation in FLVCR1, which cosegregated with the disease. A recent study has identified three independent mutations in FLVCR1 in the original and other families. Our results further confirmed that PCARP is caused by mutations in FLVCR1.

Publication types

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

MeSH terms

  • Adult
  • Amino Acid Sequence
  • Asian People / genetics*
  • Ataxia / genetics*
  • Base Sequence
  • Family*
  • Female
  • Genetic Linkage
  • Humans
  • Male
  • Membrane Transport Proteins / genetics*
  • Mutation, Missense* / physiology
  • Pedigree
  • Receptors, Virus / genetics*
  • Retinitis Pigmentosa / genetics*

Substances

  • FLVCR1 protein, human
  • Membrane Transport Proteins
  • Receptors, Virus

Supplementary concepts

  • Posterior column ataxia with retinitis pigmentosa