Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6803455 | Neurobiology of Aging | 2016 | 10 Pages |
Abstract
We examined independent and cumulative effects of 2 Alzheimer's-related genetic polymorphisms, Apolipoprotein E (APOE) and Clusterin (CLU), in relation to the deleterious effects of poor vascular health (pulse pressure [PP]) on executive function (EF) performance and change in nondemented older adults. Using a sample (n = 593; age range = 53-95 years) from the Victoria Longitudinal Study, we applied latent growth modeling to test the effect of PP, as moderated by APOE and CLU, on an EF latent variable. EF was affected by higher levels of PP but differentially less so for carriers of low-risk alleles (APOE É2+; CLU TT) than for moderate- or high-risk alleles (APOE É2â; CLU C+). The cumulative genetic risk of APOE plus CLU provided similar moderation of PP level effects on EF. Future research may focus on how APOE and CLU might provide different but complementary contributions to predicting EF level and change. Vascular health risk in synergistic association with risk-related polymorphisms can elucidate the neurobiological underpinnings of cognitive trajectories in nondemented aging.
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Biochemistry, Genetics and Molecular Biology
Ageing
Authors
G. Peggy McFall, Shraddha Sapkota, Kirstie L. McDermott, Roger A. Dixon,