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. 1995 Aug;32(8):590–592. doi: 10.1136/jmg.32.8.590

Spinocerebellar ataxia 1 (SCA1) in the Japanese in Hokkaido may derive from a single common ancestry.

A Wakisaka 1, H Sasaki 1, A Takada 1, T Fukazawa 1, Y Suzuki 1, T Hamada 1, K Iwabuchi 1, K Tashiro 1, T Yoshiki 1
PMCID: PMC1051630  PMID: 7473647

Abstract

Spinocerebellar ataxia 1 (SCA1) is caused by expansion of an unstable CAG triplet repeat located on the short arm of chromosome 6. Precise mapping has shown a positional relationship to closely linked markers in the order of D6S109-D6S274-D6S288-SCA1-AM10GA-D6S89+ ++-EDN1 from centromere to telomere. The haplotype which cosegregated with the disease was determined in 12 Japanese pedigrees with SCA1. Although the alleles of the SCA1 haplotype varied from pedigree to pedigree, depending on the distance from the SCA1 locus, the affected and presymptomatic subjects carried the same alleles at D6S288 and D6S274. All the families with SCA1 had migrated from either Miyagi or Yamagata Prefectures, neighbouring areas in the Tohoku District, the northern part of Honshu which is the main island of Japan. It seems highly likely that SCA1 in the Japanese, at least those residing in Hokkaido, derives from a single common ancestry.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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