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Polygenic score modifies risk for Alzheimer's disease in ε4 homozygotes at phenotypic extremes. | LitMetric

AI Article Synopsis

Article Abstract

Introduction: Diversity in cognition among apolipoprotein E () ε4 homozygotes can range from early-onset Alzheimer's disease (AD) to a lifetime with no symptoms.

Methods: We evaluated a phenotypic extreme polygenic risk score (PRS) for AD between cognitively healthy ε4 homozygotes aged ≥75 years (n = 213) and early-onset ε4 homozygote AD cases aged ≤65 years (n = 223) as an explanation for this diversity.

Results: The PRS for AD was significantly higher in ε4 homozygote AD cases compared to older cognitively healthy ε4/ε4 controls (odds ratio [OR] 8.39; confidence interval [CI] 2.0-35.2;  = .003). The difference in the same PRS between ε3/ε3 extremes was not as significant (OR 3.13; CI 0.98-9.92;  = .053) despite similar numbers and power. There was no statistical difference in an educational attainment PRS between these age extreme case-controls.

Discussion: A PRS for AD contributes to modified cognitive expression of the ε4/ε4 genotype at phenotypic extremes of risk.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8339682PMC
http://dx.doi.org/10.1002/dad2.12226DOI Listing

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