Warren Taylor
Last active: 3/3/2020

AGTR1 gene variation: association with depression and frontotemporal morphology.

Taylor WD, Benjamin S, McQuoid DR, Payne ME, Krishnan RR, MacFall JR, Ashley-Koch A
Psychiatry Res. 2012 202 (2): 104-9

PMID: 22703619 · PMCID: PMC3398195 · DOI:10.1016/j.pscychresns.2012.03.007

The renin-angiotensin system (RAS) is implicated in the response to physiological and psychosocial stressors, but its role in stress-related psychiatric disorders is poorly understood. We examined if variation in AGTR1, the gene coding for the type 1 angiotensin II receptor (AT(1)R), is associated with a diagnosis of depression and differences in white matter hyperintensities and frontotemporal brain volumes. Participants comprised 257 depressed and 116 nondepressed elderly Caucasian subjects who completed clinical assessments and provided blood samples for genotyping. We used a haplotype-tagging single nucleotide polymorphism (htSNP) analysis to test for variation in AGTR1. For measurement of hyperintense lesions, 1.5 Tesla magnetic resonance imaging (MRI) data were available on 33 subjects. For measurements of the hippocampus and dorsolateral prefrontal cortex (dlPFC), 3 Tesla MRI data were available on 70 subjects. Two htSNPs exhibited statistically significant frequency differences between diagnostic cohorts: rs10935724 and rs12721331. Although hyperintense lesion volume did not significantly differ by any htSNP, dlPFC and hippocampus volume differed significantly for several htSNPs. Intriguingly, for those htSNPs differing significantly for both dlPFC and hippocampus volume, the variant associated with smaller dlPFC volume was associated with larger hippocampal volume. This supports the idea that genetic variation in AGTR1 is associated with depression and differences in frontotemporal morphology.

Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.

MeSH Terms (18)

Aged Aged, 80 and over Depressive Disorder, Major Female Frontal Lobe Gene Frequency Genetic Association Studies Genotype Humans Image Processing, Computer-Assisted Logistic Models Magnetic Resonance Imaging Male Mental Status Schedule Middle Aged Polymorphism, Single Nucleotide Receptor, Angiotensin, Type 1 Temporal Lobe

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