APOE-ε4 Is Associated With Reduced Verbal Memory Performance and Higher Emotional, Cognitive, and Everyday Executive Function Symptoms Two Months After Mild Traumatic Brain Injury

Autor: Torgeir Hellstrøm, Nada Andelic, Øyvor Øistensen Holthe, Eirik Helseth, Andres Server, Kristin Eiklid, Solrun Sigurdardottir
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Frontiers in Neurology, Vol 13 (2022)
Druh dokumentu: article
ISSN: 1664-2295
DOI: 10.3389/fneur.2022.735206
Popis: BackgroundSubstantial variance exists in outcomes after mild traumatic brain injury (MTBI), and these differences are not fully explained by injury characteristics or severity. Genetic factors are likely to play a role in this variance.ObjectivesThe aim of this study was to examine associations between the apolipoprotein (APOE)-ε4 allele and memory measures at two months post-MTBI and to evaluate whether subjective cognitive and affective symptoms were associated with APOE-ε4 status. Based on previous research, it was hypothesized that APOE-ε4 carriers would show poorer verbal memory performance compared to APOE-ε4 non-carriers.MethodsNeuropsychological data at two months post-injury and blood samples that could be used to assess APOE genotype were available for 134 patients with MTBI (mean age 39.2 years, 62% males, 37% APOE-ε4 carriers). All patients underwent computed tomography at hospital admission and magnetic resonance imaging four weeks post-injury.ResultsThe APOE-ε4 + status was associated with decreased immediate memory recall (p = 0.036; β = −0.10, 95% CI [−0.19, −0.01]). Emotional, cognitive, and everyday executive function symptoms at two months post-injury were significantly higher in APOE-ε4 carriers compared to non-carriers.ConclusionThe APOE-ε4+ allele has a negative effect on verbal memory and symptom burden two months after MTBI.
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