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Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
Published on: January 16, 2019
A common genetic variant in the NOS1 regulator NOS1AP modulates cardiac repolarization
Dan E Arking1, Arne Pfeufer, Wendy Post
1McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
Nature Genetics
|May 2, 2006
Summary
Genetic variations in NOS1AP influence cardiac repolarization, measured by the electrocardiographic QT interval. This finding links genetic factors to cardiovascular health and mortality risk.
Area of Science:
- Genetics
- Cardiology
- Molecular Biology
Background:
- The electrocardiographic QT interval reflects cardiac repolarization and is linked to cardiovascular mortality.
- Understanding genetic influences on QT interval variation is crucial for cardiovascular risk assessment.
Purpose of the Study:
- To identify genetic variants associated with QT interval duration using a genome-wide association study.
- To investigate the role of NOS1AP (CAPON) in modulating cardiac repolarization.
Main Methods:
- Genome-wide association study (GWAS) on subjects with extreme QT intervals from the KORA cohort.
- Replication and validation in independent German and US (Framingham Heart Study) cohorts.
- Analysis of the NOS1AP gene as a potential modulator of cardiac repolarization.
Main Results:
- A common genetic variant in NOS1AP was identified as significantly associated with QT interval variation.
- This NOS1AP variant explains up to 1.5% of QT interval variation in subjects of European ancestry.
- Approximately 60% of individuals of European ancestry carry at least one minor allele of this variant.
Conclusions:
- NOS1AP (CAPON) is a novel genetic target influencing cardiac repolarization.
- Genetic variation in NOS1AP contributes to individual differences in QT interval duration.
- These findings have implications for understanding genetic predispositions to cardiovascular events.
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