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Sökning: WFRF:(Axelman K.) > (1995-1999)

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  • Axelman, K, et al. (författare)
  • Apolipoprotein E and alpha1-antichymotrypsin genotypes and age of onset of familial Alzheimer's disease
  • 1999
  • Ingår i: Dementia and geriatric cognitive disorders. - : S. Karger AG. - 1420-8008 .- 1421-9824. ; 10:1, s. 1-5
  • Tidskriftsartikel (refereegranskat)abstract
    • Apolipoprotein E (APOE) and α<sub>1</sub>-antichymotrypsin (ACT) genotype and allele frequency distribution were investigated in 113 familial Alzheimer’s disease (AD) cases. A significantly higher σ4 frequency was observed in patients with an age of onset between 55–64 and 65–74 years compared to individuals with later or earlier onset. No difference in ACT <i>A</i> allele frequency was seen in any onset group, nor was any influence of ACT genotypes on the age of onset observed. However, the mean age of onset was lowered by the presence of the ACT/AA and ACT/TT genotypes among APOE σ3/3 bearers. Possible APOE effects on age of onset were evaluated in 78 affected sib pairs. An earlier age of onset was observed in siblings with an σ4 allele compared to siblings without an σ4 allele. This supports the notion that the σ4 allele promotes an earlier age of onset. However, in siblings with the same APOE genotype, a wide range of onset was seen, indicating that unknown genetic or environmental factors affect the expression of AD.
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