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APOE ?4 and resting-state functional connectivity in racially/ethnically diverse older adults.


ABSTRACT: Introduction:Numerous neuroimaging studies demonstrated an association between the apolipoprotein E (APOE) ?4 allele and resting-state functional connectivity (rsFC) of regions within the default mode network (DMN), both in healthy populations and patients with AD. It remains unclear whether the APOE ?4 allele differentially affects the brain's functional network architecture across race/ethnicity. Methods:We investigated rsFC within DMN subsystems in 170 APOE ?4 carriers compared to 387 APOE ?4 non-carriers across three major racial/ethnic groups, including non-Hispanic Whites (n = 166), non-Hispanic Blacks (n = 185), and Hispanics (n = 206) from the Washington Heights-Inwood Columbia Aging Project. Results:Compared to APOE ?4 non-carriers, APOE ?4 carriers had lower rsFC in temporal DMN, but only in non-Hispanic Whites. Non-Hispanic Black and Hispanic APOE ?4 carriers had slightly higher or similar rsFC compared with non-Hispanic White APOE ?4 non-carriers. Discussion:These findings suggest that APOE ?4 modulates DMN rsFC differently in non-Hispanic Whites compared with non-Hispanic Blacks and Hispanics.

SUBMITTER: Turney IC 

PROVIDER: S-EPMC7508460 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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APOE <i>ε</i>4 and resting-state functional connectivity in racially/ethnically diverse older adults.

Turney Indira C IC   Chesebro Anthony G AG   Rentería Miguel Arce MA   Lao Patrick J PJ   Beato Juliet M JM   Schupf Nicole N   Mayeux Richard R   Manly Jennifer J JJ   Brickman Adam M AM  

Alzheimer's & dementia (Amsterdam, Netherlands) 20200922 1


<h4>Introduction</h4>Numerous neuroimaging studies demonstrated an association between the apolipoprotein E (APOE) <i>ε</i>4 allele and resting-state functional connectivity (rsFC) of regions within the default mode network (DMN), both in healthy populations and patients with AD. It remains unclear whether the APOE <i>ε</i>4 allele differentially affects the brain's functional network architecture across race/ethnicity.<h4>Methods</h4>We investigated rsFC within DMN subsystems in 170 APOE <i>ε</  ...[more]

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