The Polymorphism of YWHAE, a Gene Encoding 14-3-3epsilon, and Brain Morphology in Schizophrenia: a Voxel-based Morphometric Study

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2014 Aug 9

PMID 25105667

Citations 7

Authors

Mikio Kido

Yukako Nakamura

Kiyotaka Nemoto

Tsutomu Takahashi

Branko Aleksic

Atsushi Furuichi

Yumiko Nakamura

Masashi Ikeda

Kyo Noguchi

Kozo Kaibuchi

Nakao Iwata

Norio Ozaki

Michio Suzuki

Affiliations

Soon will be listed here.

Abstract

Background: YWHAE is a possible susceptibility gene for schizophrenia that encodes 14-3-3epsilon, a Disrupted-in-Schizophrenia 1 (DISC1)-interacting molecule, but the effect of variation in its genotype on brain morphology remains largely unknown.

Methods: In this voxel-based morphometric magnetic resonance imaging study, we conducted whole-brain analyses regarding the effects of YWHAE single-nucleotide polymorphisms (SNPs) (rs28365859, rs11655548, and rs9393) and DISC1 SNP (rs821616) on gray matter volume in a Japanese sample of 72 schizophrenia patients and 86 healthy controls. On the basis of a previous animal study, we also examined the effect of rs28365859 genotype specifically on hippocampal volume.

Results: Whole-brain analyses showed no significant genotype effect of these SNPs on gray matter volume in all subjects, but we found significant genotype-by-diagnosis interaction for rs28365859 in the left insula and right putamen. The protective C allele carriers of rs28365859 had a significantly larger left insula than the G homozygotes only for schizophrenia patients, while the controls with G allele homozygosity had a significantly larger right putamen than the C allele carriers. The C allele carriers had a larger right hippocampus than the G allele homozygotes in schizophrenia patients, but not in healthy controls. No significant interaction was found between rs28365859 and DISC1 SNP on gray matter volume.

Conclusions: These different effects of the YWHAE (rs28365859) genotype on brain morphology in schizophrenia and healthy controls suggest that variation in its genotype might be, at least partly, related to the abnormal neurodevelopment, including in the limbic regions, reported in schizophrenia. Our results also suggest its specific role among YWHAE SNPs in the pathophysiology of schizophrenia.

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