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

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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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Data availability statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

We thank Qin Yin, Sruthi Ramesh, Bryn Thompson, Lingfei Tang, Dana McCall, David Zhijian Chen, and Pavan Jella Kumar for assistance in data collection.

Funding

This work was supported in part by the National Institutes of Health (grant R01-MH107512 to PI NO, and grant R01-AG011230 to multi-PI NR and AMD) and Blue Cross Blue Shield Michigan (BCBSMI) Foundation award to RH.

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Conceptualization (RH, QJ, NO), Methodology (RH, QJ, NO), Formal Analysis (RH, AMD, NR, NO), Visualization (RH, AMD, NO), Investigation (RH, AMD, NO), Writing Original Draft (RH, AMD, NR, NO), Writing Review and Editing (RH, AMD, NR, NO), Supervision and Funding Acquisition (NO).

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Correspondence to Noa Ofen.

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Homayouni, R., Daugherty, A.M., Yu, Q. et al. KIBRA single nucleotide polymorphism is associated with hippocampal subfield volumes and cognition across development. Brain Struct Funct 229, 223–230 (2024). https://doi.org/10.1007/s00429-023-02716-w

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  • DOI: https://doi.org/10.1007/s00429-023-02716-w

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