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Published in: Brain Structure and Function 1/2024

18-10-2023 | Brief Report

KIBRA single nucleotide polymorphism is associated with hippocampal subfield volumes and cognition across development

Authors: Roya Homayouni, Ana. M. Daugherty, Qijing Yu, Naftali Raz, Noa Ofen

Published in: Brain Structure and Function | Issue 1/2024

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Abstract

The hippocampus (Hc) consists of cytoarchitectonically and functionally distinct subfields: dentate gyrus (DG), cornu ammonis (CA1-3), and subiculum. In adults, a single nucleotide polymorphism (rs17070145, C→ T) in KIBRA, a gene encoding the eponymous (KIdney-BRAin) protein, is associated with variability in Hc subfield volumes and episodic memory. T-allele carriers have larger DG and CA volumes and better episodic memory compared to C-homozygotes. Little is known, however, about KIBRA’s role in the development of the brain and cognition. In a sample of children, adolescents, and young adults (N = 176, ages 5– 25 years), we replicated the adult association between KIBRA T-allele and larger DG and CA volumes but observed no relationship between KIBRA rs17070145 polymorphism and episodic memory. We noted, however, that a general cognitive performance index (IQ) differed across the allelic groups, with the lowest scores among T-homozygotes and the highest among C-homozygotes. Thus, in this developmental sample, KIBRA appears to have opposing effects on regional brain volume and cognition. These influences of KIBRA SNP may stem from associations between developmental reduction in brain volume and gains in cognitive performance—a hypothesis to be tested in longitudinal studies.
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Metadata
Title
KIBRA single nucleotide polymorphism is associated with hippocampal subfield volumes and cognition across development
Authors
Roya Homayouni
Ana. M. Daugherty
Qijing Yu
Naftali Raz
Noa Ofen
Publication date
18-10-2023
Publisher
Springer Berlin Heidelberg
Published in
Brain Structure and Function / Issue 1/2024
Print ISSN: 1863-2653
Electronic ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-023-02716-w

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