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Cognitive decline in Alzheimer’s disease is not associated with APOE

Katzourou, Ioanna, Leonenko, Ganna, Ivanov, Dobril, Meggy, Alun, Marshall, Rachel, Sims, Rebecca, Williams, Julie, Holmans, Peter and Escott-Price, Valentina 2021. Cognitive decline in Alzheimer’s disease is not associated with APOE. Journal of Alzheimer's Disease 10.3233/jad-210685

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Abstract

Background:The rate of cognitive decline in Alzheimer’s disease (AD) has been found to vary widely between individuals, with numerous factors driving this heterogeneity. Objective:This study aimed to compute a measure of cognitive decline in patients with AD based on clinical information and to utilize this measure to explore the genetic architecture of cognitive decline in AD. Methods:An in-house cohort of 616 individuals, hereby termed the Cardiff Genetic Resource for AD, as well as a subset of 577 individuals from the publicly available ADNI dataset, that have been assessed at multiple timepoints, were used in this study. Measures of cognitive decline were computed using various mixed effect linear models of Mini-Mental State Examination (MMSE). After an optimal model was selected, a metric of cognitive decline for each individual was estimated as the random slope derived from this model. This metric was subsequently used for testing the association of cognitive decline with apolipoprotein E (APOE) genotype. Results:No association was found between the number of APOE ɛ2 or ɛ4 alleles and the rate of cognitive decline in either of the datasets examined. Conclusion:Further exploration is required to uncover possible genetic variants that affect the rate of decline in patients with AD.

Item Type: Article
Date Type: Published Online
Status: In Press
Schools: Medicine
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Publisher: IOS Press
ISSN: 1387-2877
Funders: Wellcome Trust
Date of First Compliant Deposit: 10 August 2021
Date of Acceptance: 5 August 2021
Last Modified: 07 Oct 2021 09:36
URI: http://orca.cardiff.ac.uk/id/eprint/143278

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