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. 2001 Oct;69(4):895-9.
doi: 10.1086/323472. Epub 2001 Aug 7.

The amyloid precursor protein locus and very-late-onset Alzheimer disease

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The amyloid precursor protein locus and very-late-onset Alzheimer disease

J M Olson et al. Am J Hum Genet. 2001 Oct.

Erratum in

  • Am J Hum Genet 2001 Oct;69(4):922

Abstract

Although mutations in the amyloid-beta precursor protein (APP) gene are known to confer high risk of Alzheimer disease (AD) to a small percentage of families in which it has early onset, convincing evidence of a major role for the APP locus in late-onset AD has not been forthcoming. In this report, we have used a covariate-based affected-sib-pair linkage method to analyze the chromosome 21 clinical and genetic data obtained on affected sibships by the National Institute of Mental Health Alzheimer Disease Genetics Initiative. The baseline model (without covariates) gave a LOD score of 0.02, which increases to 1.43 when covariates representing the additive effects of E2 and E4 are added. Larger increases in LOD scores were found when age at last examination/death (LOD score 5.54; P=.000002) or age at onset plus disease duration (LOD score 5.63; P=.000006) were included in the linkage model. We conclude that the APP locus may predispose to AD in the very elderly.

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References

Electronic-Database Information

    1. Alzheimer Disease Genetics Initiative Data Archive, http://zork.wustl.edu/nimh/ad.html (for NIMH AD Genetics Initiative)
    1. Human Genetic Analysis Resource, The, http://darwin.cwru.edu/ (for S.A.G.E. software)
    1. Online Mendelian Inheritance in Man (OMIM), http://www.ncbi.nlm.nih.gov/Omim/ (for AD [MIM 104300], APP [MIM 104760], and ApoE [MIM 107741])

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