Behavior Genetics

, Volume 36, Issue 2, pp 185–194

Longitudinal Memory Performance During Normal Aging: Twin Association Models of APOE and Other Alzheimer Candidate Genes

Authors

    • Department of PsychologyUniversity of California – Riverside
    • Department of PsychologyUniversity of California – Riverside
  • Jonathan A. Prince
    • Center for Genomics and BioinformaticsKarolinska Institutet
  • Lars Feuk
    • Center for Genomics and BioinformaticsKarolinska Institutet
  • Anthony J. Brookes
    • Center for Genomics and BioinformaticsKarolinska Institutet
    • Department of GeneticsLeicester University
  • Margaret Gatz
    • Department of Medical Epidemiology and BiostatisticsKarolinska Institutet
    • Department of PsychologyUniversity of Southern California
  • Nancy L. Pedersen
    • Department of Medical Epidemiology and BiostatisticsKarolinska Institutet
    • Department of PsychologyUniversity of Southern California
Article

DOI: 10.1007/s10519-005-9027-6

Cite this article as:
Reynolds, C.A., Prince, J.A., Feuk, L. et al. Behav Genet (2006) 36: 185. doi:10.1007/s10519-005-9027-6

Abstract

The APOE gene (apolipoprotein E) is a major risk factor for Alzheimer’s Disease (AD) but has been inconsistently associated with memory in nondemented adults. Two other genes with mixed support as genetic risk factors for AD, A2M (alpha-2-macroglobulin) and LRP (low-density lipoprotein receptor-related protein), have not been studied in relation to memory among nondemented adults. The present study examined these three genes and latent growth parameters estimated from memory performance spanning 13 years in 478 twins from the Swedish Adoption/Twin Study of Aging (SATSA). APOE was associated with working and recall memory ability levels and working memory rate of change, with e4 homozygotes exhibiting the worst performance at all ages. Homozygotes for the rare A2M insertion/deletion variant exhibited accelerating decline on delayed figural recognition. There were no significant findings for LRP. Dominance, often untested in previous studies, was important in the current study’s findings.

Keywords

A2MAPOEassociationmemorytwins

Copyright information

© Springer Science+Business Media, Inc. 2006