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Published on: August 16, 2018
Variations in the alpha2A-adrenergic receptor gene and their functional effects
Daniel Kurnik1, Mordechai Muszkat, Chun Li
1Department of Medicine, Division of Clinical Pharmacology, Center for Human Genetics Research, Vanderbilt University School of Medicine, Nashville, TN 37232-6606, USA.
Common genetic variants in the alpha2A-adrenergic receptor (ADRA2A) gene do not significantly impact baseline cardiovascular measures like heart rate or blood pressure in healthy individuals.
Area of Science:
- Pharmacogenomics
- Cardiovascular Genetics
- Molecular Biology
Background:
- The alpha2A-adrenergic receptor (ADRA2A) gene is crucial for regulating sympathetic activity, influencing heart rate and blood pressure.
- Understanding genetic variations in ADRA2A is key to comprehending individual cardiovascular responses.
Purpose of the Study:
- To systematically identify variants within the ADRA2A gene.
- To characterize the haplotype structure of ADRA2A.
- To investigate the functional impact of ADRA2A variants on cardiovascular phenotypes.
Main Methods:
- Sequencing of promoter, exonic, and 3'-flanking regions of the ADRA2A gene in 135 healthy subjects.
- Inference of haplotypes using an expectation-maximization algorithm.
- Comparison of plasma norepinephrine, heart rate, and blood pressure among genotype and haplotype groups.
Main Results:
- Discovery of 41 ADRA2A variants, including 24 novel ones.
- Inference of 11 common haplotypes representing 99% of the cohort.
- Association of two rare variants with significantly elevated plasma norepinephrine levels in a subset of subjects.
Conclusions:
- Novel variants and the haplotype structure of the ADRA2A gene have been elucidated.
- Common genetic variations in ADRA2A are not major determinants of baseline cardiovascular parameters in healthy individuals.
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