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Huntington disease in Finland: a molecular and genealogical study

Summary

Huntington disease (HD) is found at exceptionally low frequency in the Finnish population. In this population, linkage disequilibrium was earlier established with markers from the D4S10 and D4S43 loci. We now report a continuation to the restriction fragment length polymorphism haplotype analysis, in combination with a genealogical study of all the Finnish HD families. When the HD pedigrees were systematically traced to the 18th century, only one consanguinity was found, and a high percentage (28%) of the families had foreign ancestors. The majority of the Finnish ancestors were localized to border regions or trade centers of the country following the old postal routes. The observed high risk haplotypes formed with markers from the D4S10 and D4S43 loci were evenly distributed among the HD families in different geographical locations. Consequently, the HD gene(s) has most probably arrived in Finland on several occasions via foreign immigrants during the last few centuries.

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Ikonen, E., Ignatius, J., Norio, R. et al. Huntington disease in Finland: a molecular and genealogical study. Hum Genet 89, 275–280 (1992). https://doi.org/10.1007/BF00220539

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Keywords

  • Linkage Disequilibrium
  • Fragment Length
  • Length Polymorphism
  • Restriction Fragment Length Polymorphism
  • Restriction Fragment