Localization of the gene for familial dysautonomia on chromosome 9 and definition of DNA markers for genetic diagnosis

Nat Genet. 1993 Jun;4(2):160-4. doi: 10.1038/ng0693-160.

Abstract

Familial dysautonomia (DYS), the Riley-Day syndrome, is an autosomal recessive disorder characterized by developmental loss of neurons from the sensory and autonomic nervous system. It is limited to the Ashkenazi Jewish population, where the carrier frequency is 1 in 30. We have mapped the DYS gene to chromosome 9q31-q33 by linkage with ten DNA markers in 26 families. The maximum lod score of 21.1 with no recombinants was achieved with D9S58. This marker also showed strong linkage disequilibrium with DYS, with one allele present on 73% of affected chromosomes compared to 5.4% of controls (chi 2 = 3142, 15 d.f. p < 0.0001). D9S53 and D9S105 represent the closest flanking markers for the disease gene. This localization will permit prenatal diagnosis of DYS in affected families and aid the isolation of the disease gene.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Alleles
  • Chromosome Mapping
  • Chromosomes, Human, Pair 9*
  • Dysautonomia, Familial / diagnosis
  • Dysautonomia, Familial / epidemiology
  • Dysautonomia, Familial / ethnology
  • Dysautonomia, Familial / genetics*
  • Female
  • Fetal Diseases / diagnosis
  • Fetal Diseases / genetics
  • Gene Frequency
  • Genes, Recessive
  • Genetic Carrier Screening
  • Genetic Markers*
  • Humans
  • Incidence
  • Jews / genetics
  • Linkage Disequilibrium
  • Lod Score
  • Male
  • Pedigree
  • Polymerase Chain Reaction
  • Polymorphism, Genetic*
  • Polymorphism, Restriction Fragment Length
  • Prenatal Diagnosis

Substances

  • Genetic Markers