Obesity gene NEGR1 associated with white matter integrity in healthy young adults.

Abstract:

:Obesity is a crucial public health issue in developed countries, with implications for cardiovascular and brain health as we age. A number of commonly-carried genetic variants are associated with obesity. Here we aim to see whether variants in obesity-associated genes--NEGR1, FTO, MTCH2, MC4R, LRRN6C, MAP2K5, FAIM2, SEC16B, ETV5, BDNF-AS, ATXN2L, ATP2A1, KCTD15, and TNN13K--are associated with white matter microstructural properties, assessed by high angular resolution diffusion imaging (HARDI) in young healthy adults between 20 and 30 years of age from the Queensland Twin Imaging study (QTIM). We began with a multi-locus approach testing how a number of common genetic risk factors for obesity at the single nucleotide polymorphism (SNP) level may jointly influence white matter integrity throughout the brain and found a wide spread genetic effect. Risk allele rs2815752 in NEGR1 was most associated with lower white matter integrity across a substantial portion of the brain. Across the area of significance in the bilateral posterior corona radiata, each additional copy of the risk allele was associated with a 2.2% lower average FA. This is the first study to find an association between an obesity risk gene and differences in white matter integrity. As our subjects were young and healthy, our results suggest that NEGR1 has effects on brain structure independent of its effect on obesity.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Dennis EL,Jahanshad N,Braskie MN,Warstadt NM,Hibar DP,Kohannim O,Nir TM,McMahon KL,de Zubicaray GI,Montgomery GW,Martin NG,Toga AW,Wright MJ,Thompson PM

doi

10.1016/j.neuroimage.2014.07.041

subject

Has Abstract

pub_date

2014-11-15 00:00:00

pages

548-57

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(14)00624-7

journal_volume

102 Pt 2

pub_type

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