APOE-ε4 selectively modulates posteromedial cortex activity during scene perception and short-term memory in young healthy adults

Shine, J. P., Hodgetts, C. J. ORCID: https://orcid.org/0000-0002-0339-2447, Postans, M., Lawrence, A. D. ORCID: https://orcid.org/0000-0001-6705-2110 and Graham, K. S. ORCID: https://orcid.org/0000-0002-1512-7667 2015. APOE-ε4 selectively modulates posteromedial cortex activity during scene perception and short-term memory in young healthy adults. Scientific Reports 5 , 16322. 10.1038/srep16322

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Abstract

Apolipoprotein E (APOE) ε4 is a major genetic risk factor for Alzheimer’s disease (AD), yet the mechanisms by which APOE-ε4 influences early-life brain function, and hence, in turn, risk for later-life AD, are poorly understood. Here, we report a novel, and selective, pattern of functional brain activity alteration in healthy young adult human APOE-ε4 carriers. Our findings suggest that APOE-ε4 may influence vulnerability to poorer later life cognitive health via its effect on posteromedial cortex (PMC), a hub region within a brain network involved in spatial processing, and necessary for episodic memory. In two neuroimaging tasks, APOE-ε4 carriers showed an inability to effectively modulate PMC during scene, but not face and object, working memory and perception. This striking pattern overlaps both functionally and topographically, with the earliest cognitive deficits seen in clinical AD, as well as reported alterations in the default network in amyloid-positive individuals at increased risk of AD.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Neuroscience and Mental Health Research Institute (NMHRI) Psychology Cardiff University Brain Research Imaging Centre (CUBRIC)
Additional Information:	This work is licensed under a Creative Commons Attribution 4.0 International License.
Publisher:	Nature Publishing Group
ISSN:	2045-2322
Funders:	MRC, BBSRC, Welsh Government, Alzheimer's Research UK, The Waterloo Foundation
Date of First Compliant Deposit:	30 March 2016
Date of Acceptance:	12 October 2015
Last Modified:	19 May 2023 03:37
URI:	https://orca.cardiff.ac.uk/id/eprint/80792

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