Abstract:
:We present a linkage study in a four-generation autosomal dominant cerebellar ataxia (ADCA) family of Dutch ancestry. The family shows a clinically and genetically distinct form of ADCA. This neurodegenerative disorder manifests in the family as a relatively mild ataxia syndrome with some additional characteristic symptoms. We have identified a SCA19 locus, approved by the Human Genome Nomenclature Committee that can be assigned to the chromosome region 1p21-q21. Our mutation analysis failed to identify any mutations in the known spinocerebellar ataxia ( SCA) genes and linkage analysis excluded the remaining SCA loci. We therefore performed a genome-wide scan with 350 microsatellite markers to identify the location of the disease-causing gene in this family. Multi-point analysis was performed and exclusion maps were generated. Linkage and haplotype analysis revealed linkage to an interval located on chromosome 1. The estimated minimal prevalence of ADCA in the Netherlands is about 3:100,000. To date, sixteen different SCA loci have been identified in ADCA ( SCA1-8 and SCA10-17). However, mutation analysis has been commercially available only for the SCA1, 2, 3, 6 and 7 genes. So far, a molecular analysis in these SCA genes cannot be made in about one-third of the ADCA families. Thus, the identification of this new, additional SCA19 locus will contribute to expanding the DNA diagnostic possibilities.
journal_name
Hum Genetjournal_title
Human geneticsauthors
Verbeek DS,Schelhaas JH,Ippel EF,Beemer FA,Pearson PL,Sinke RJdoi
10.1007/s00439-002-0782-7keywords:
subject
Has Abstractpub_date
2002-10-01 00:00:00pages
388-93issue
4-5eissn
0340-6717issn
1432-1203journal_volume
111pub_type
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