BACKGROUND: Myocardial mass is a key determinant of cardiac muscle function and hypertrophy. Myocardial depolarization leading to cardiac muscle contraction is reflected by the amplitude and duration of the QRS complex on the electrocardiogram (ECG). Abnormal QRS amplitude or duration reflect changes in myocardial mass and conduction, and are associated with increased risk of heart failure and death. OBJECTIVES: This meta-analysis sought to gain insights into the genetic determinants of myocardial mass. METHODS: We carried out a genome-wide association meta-analysis of 4 QRS traits in up to 73,518 individuals of European ancestry, followed by extensive biological and functional assessment. RESULTS: We identified 52 genomic loci, of which 32 are novel, that are reliably associated with 1 or more QRS phenotypes at p < 1 × 10(-8). These loci are enriched in regions of open chromatin, histone modifications, and transcription factor binding, suggesting that they represent regions of the genome that are actively transcribed in the human heart. Pathway analyses provided evidence that these loci play a role in cardiac hypertrophy. We further highlighted 67 candidate genes at the identified loci that are preferentially expressed in cardiac tissue and associated with cardiac abnormalities in Drosophila melanogaster and Mus musculus. We validated the regulatory function of a novel variant in the SCN5A/SCN10A locus in vitro and in vivo. CONCLUSIONS: Taken together, our findings provide new insights into genes and biological pathways controlling myocardial mass and may help identify novel therapeutic targets.
Impact Factor
Scopus SNIP
Web of Science Times Cited
Scopus Cited By
Altmetric
17.759
5.140
65
78
Tags
Anmerkungen
Besondere Publikation
Auf Hompepage verbergern
PublikationstypArtikel: Journalartikel
DokumenttypWissenschaftlicher Artikel
Typ der Hochschulschrift
Herausgeber
SchlagwörterQrs ; Electrocardiogram ; Genetic Association Study ; Heart Failure ; Left Ventricular Hypertrophy; Left-ventricular Hypertrophy; Cardiac-hypertrophy; Regulatory Dna; Electrocardiogram; Mortality; Disease; Voltage; Dysfunction; Genome; Heart
POF Topic(s)30501 - Systemic Analysis of Genetic and Environmental Factors that Impact Health 30202 - Environmental Health 30205 - Bioengineering and Digital Health 30505 - New Technologies for Biomedical Discoveries
Forschungsfeld(er)Genetics and Epidemiology Enabling and Novel Technologies