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A genome-wide association study identifies 6p21 as novel risk locus for dilated cardiomyopathy
Benjamin Meder1, Frank Rühle, Tanja Weis
1Department of Internal Medicine III, University Heidelberg, Im Neuenheimer Feld 410, D-69120 Heidelberg, Germany.
Common genetic variants contribute to dilated cardiomyopathy (DCM). This study identified a new genetic risk locus on chromosome 6p21, highlighting the role of inflammatory processes in DCM pathogenesis.
Area of Science:
- Genetics
- Cardiology
- Immunology
Background:
- Dilated cardiomyopathy (DCM) is a major cause of heart failure and cardiac transplantation.
- Monogenic and extrinsic causes explain only a subset of DCM cases, suggesting a role for common genetic variants.
Purpose of the Study:
- To identify novel genetic risk loci for DCM using a large-scale genome-wide association study.
- To investigate the contribution of common genetic variants to DCM pathogenesis, onset, and progression.
Main Methods:
- A three-staged case-control genome-wide association study design.
- Analysis of over 4100 DCM cases and 7600 controls.
- Replication in an independent cohort and analysis of expression quantitative trait loci (eQTL).
Main Results:
- Identification and replication of a novel genetic susceptibility locus on chromosome 6p21.
- The most significant association signal was rs9262636 (P = 4.90 × 10(-9)) in HCG22.
- rs9262636 was identified as an eQTL for genes encoding major histocompatibility complex (MHC) heavy chain receptors.
Conclusions:
- The study reveals a novel genetic locus associated with DCM.
- This finding underscores the role of genetically driven inflammatory processes in idiopathic DCM pathogenesis.
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