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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Clinical and genetic analysis of a Tunisian family with autosomal dominant cerebellar ataxia type 1 linked to the SCA2 locus.

Autosomal dominant cerebellar ataxias (ADCA) type 1 are a clinically and genetically heterogeneous group of neurodegenerative disorders. We report a large Tunisian ADCA type 1 family in which 17 patients (mean age at onset +/- SD = 35.6 +/- 15.3 years) were examined. There was mean anticipation of 10.3 +/- 15.4 years in this family; anticipation was greater in paternal (28 +/- 8.2 years) than in maternal (2.7 +/- 10.9 years) transmission. Linkage analysis performed with microsatellite markers linked to the spinal cerebellar ataxia 1 ( SCA1) locus on chromosome 6p and the SCA2 locus on chromosome 12q excluded linkage to SCA1, but there was close linkage with marker D12S105 (Zmax = 2.51 at theta = 0.00). This result was confirmed by multipoint analysis, which generated a maximal lod score of 3.46 at this locus. Multipoint analysis and haplotype reconstruction reduced the interval containing the SCA2 locus to 6.4 cM, a narrowing of the 35-cM interval in a previously described Cuban SCA2 family with a clinical picture similar to that of our family, including a high frequency of postural and action tremor.[1]

References

  1. Clinical and genetic analysis of a Tunisian family with autosomal dominant cerebellar ataxia type 1 linked to the SCA2 locus. Belal, S., Cancel, G., Stevanin, G., Hentati, F., Khati, C., Ben Hamida, C., Auburger, G., Agid, Y., Ben Hamida, M., Brice, A. Neurology (1994) [Pubmed]
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