Mapping of spinocerebellar ataxia 13 to chromosome 19q13.3-q13.4 in a family with autosomal dominant cerebellar ataxia and mental retardation

Am J Hum Genet. 2000 Jul;67(1):229-35. doi: 10.1086/302958. Epub 2000 May 11.


We examined a large French family with autosomal dominant cerebellar ataxia (ADCA) that was excluded from all previously identified spinocerebellar ataxia genes and loci. The patients-seven women and a 4-year-old boy-exhibited slowly progressive childhood-onset cerebellar gait ataxia associated with cerebellar dysarthria, moderate mental retardation (IQ 62-76), and mild developmental delays in motor acquisition. Nystagmus and pyramidal signs were also observed in some cases. This unique association of clinical features clearly distinguishes this new entity from other previously described ADCA. Cerebral magnetic-resonance imaging showed moderate cerebellar and pontine atrophy in two patients. We performed a genomewide search and found significant evidence for linkage to chromosome 19q13.3-q13.4, in an approximately 8-cM interval between markers D19S219 and D19S553.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Age of Onset
  • Child, Preschool
  • Chromosome Mapping
  • Chromosomes, Human, Pair 19 / genetics*
  • Female
  • France
  • Genes, Dominant / genetics
  • Genetic Markers / genetics
  • Humans
  • Intellectual Disability / complications*
  • Intellectual Disability / epidemiology
  • Intellectual Disability / genetics*
  • Intellectual Disability / physiopathology
  • Lod Score
  • Magnetic Resonance Imaging
  • Male
  • Middle Aged
  • Pedigree
  • Spinocerebellar Ataxias / complications*
  • Spinocerebellar Ataxias / epidemiology
  • Spinocerebellar Ataxias / genetics*
  • Spinocerebellar Ataxias / physiopathology


  • Genetic Markers