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Apolipoprotein E ϵ4 is positively related to spatial performance but unrelated to hippocampal volume in healthy young adults.

Artikel i vetenskaplig tidskrift
Författare Eva Stening
Jonas Persson
Elias Eriksson
Lars-Olof Wahlund
Henrik Zetterberg
Hedvig Söderlund
Publicerad i Behavioural brain research
Volym 299
Sidor 11–18
ISSN 1872-7549
Publiceringsår 2016
Publicerad vid Institutionen för neurovetenskap och fysiologi, sektionen för psykiatri och neurokemi
Institutionen för neurovetenskap och fysiologi, sektionen för farmakologi
Sidor 11–18
Språk en
Länkar dx.doi.org/10.1016/j.bbr.2015.11.00...
Ämneskategorier Neurokemi

Sammanfattning

The apolipoprotein E (APOE) ϵ4 allele is known to be a major genetic risk factor for Alzheimer's disease (AD). It has been linked to especially episodic memory decline and hippocampal atrophy in both healthy and demented elderly populations. In young adults, ϵ4 carriers have shown better performance in episodic memory compared to non-carriers. Spatial memory, however, has not been thoroughly assessed in relation to APOE in spite of its dependence on the hippocampus. In this study, we assessed the effect of APOE genotype on a variety of spatial and episodic memory tasks as well as hippocampal volume assessed through manual tracing in a sample of young adults (N=123). We also assessed whether potential effects were modulated by sex. The presence of one or more ϵ4 alleles had positive effects on spatial function and memory and object location memory, but no effect on word recognition. Men were superior to women in spatial function and memory but there were no sex differences in the other tasks. In spite of APOE ϵ4 carriers having superior performance in several memory tasks, no difference was found as a function of APOE genotype in hippocampal volume. To our knowledge, this study is the first to show that APOE ϵ4 has a positive effect on spatial ability in young adults.

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