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Novel genetic variants contributing to left ventricular hypertrophy: the HyperGEN study
Donna K Arnett1, Richard B Devereux, Dabeeru C Rao
1Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, 1665 University Boulevard, Birmingham, AL, USA. arnett@uab.edu
Journal of Hypertension
|July 14, 2009
Summary
This study identified genes linked to left ventricular mass variations in hypertensive individuals. Genetic variations in specific genes were associated with heart phenotypes in Black and White participants.
Area of Science:
- Genetics
- Cardiovascular Disease
- Hypertension
Background:
- Left ventricular mass (LVM) is a key indicator of cardiovascular health.
- Hypertension is a major risk factor for left ventricular hypertrophy (LVH).
- Understanding genetic contributions to LVM variation is crucial for personalized medicine.
Purpose of the Study:
- To identify genes influencing echocardiographic left ventricular mass and related traits.
- To analyze genetic variation using linkage and linkage disequilibrium in hypertensive sibships.
Main Methods:
- Utilized data from the Hypertension Genetic Epidemiology Network (HyperGEN) study.
- Measured left ventricular mass, relative wall thickness (RWT), and aortic root diameter (ARD) via echocardiography.
- Genotyped 387 polymorphisms and performed linkage analyses on 885 siblings from 382 sibships.
Main Results:
- Observed significant linkage peaks on multiple chromosomes, notably chromosome 4.
- Identified candidate genes including NPY1R, NPY2R, NPY5R, SFRP2, CPE, and IL15.
- Found associations between specific SNPs in IL15, NPY2R, and NPY5R and cardiac phenotypes in Black individuals, and suggestive associations in White individuals.
Conclusions:
- Genetic variations in NPY1R, NPY2R, NPY5R, CPE, IL15, and SFRP2 are associated with left ventricular phenotypes.
- These findings highlight the role of specific genes in cardiovascular traits within hypertensive populations.
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