@article {9007, title = {Identification of Functional Genetic Determinants of Cardiac Troponin T and I in a Multiethnic Population and Causal Associations With Atrial Fibrillation.}, journal = {Circ Genom Precis Med}, volume = {14}, year = {2021}, month = {2021 12}, pages = {e003460}, abstract = {

BACKGROUND: Elevated cardiac troponin levels in blood are associated with increased risk of cardiovascular diseases and mortality. Cardiac troponin levels are heritable, but their genetic architecture remains elusive.

METHODS: We conducted a transethnic genome-wide association analysis on high-sensitivity cTnT (cardiac troponin T; hs-cTnT) and high-sensitivity cTnI (cardiac troponin I; hs-cTnI) levels in 24 617 and 14 336 participants free of coronary heart disease and heart failure from 6 population-based cohorts, followed by a series of bioinformatic analyses to decipher the genetic architecture of hs-cTnT and hs-cTnI.

RESULTS: We identified 4 genome-wide significant loci for hs-cTnT including a novel locus rs3737882 in and 3 previously reported loci at , , and . One known locus at was replicated for hs-cTnI. One copy of C allele for rs3737882 was associated with a 6\% increase in hs-cTnT levels (minor allele frequency, 0.18; =2.80{\texttimes}10). We observed pleiotropic loci located at and . The proportions of variances explained by single-nucleotide polymorphisms were 10.15\% and 7.74\% for hs-cTnT and hs-cTnI, respectively. Single-nucleotide polymorphisms were colocalized with expression in heart tissues and hs-cTnT and with expression in artery, heart tissues, and whole blood and both troponins. Mendelian randomization analyses showed that genetically increased hs-cTnT and hs-cTnI levels were associated with higher odds of atrial fibrillation (odds ratio, 1.38 [95\% CI, 1.25-1.54] for hs-cTnT and 1.21 [95\% CI, 1.06-1.37] for hs-cTnI).

CONCLUSIONS: We identified a novel genetic locus associated with hs-cTnT in a multiethnic population and found that genetically regulated troponin levels were associated with atrial fibrillation.

}, issn = {2574-8300}, doi = {10.1161/CIRCGEN.121.003460}, author = {Yang, Yunju and Bartz, Traci M and Brown, Michael R and Guo, Xiuqing and Zilh{\~a}o, Nuno R and Trompet, Stella and Weiss, Stefan and Yao, Jie and Brody, Jennifer A and deFilippi, Christopher R and Hoogeveen, Ron C and Lin, Henry J and Gudnason, Vilmundur and Ballantyne, Christie M and D{\"o}rr, Marcus and Jukema, J Wouter and Petersmann, Astrid and Psaty, Bruce M and Rotter, Jerome I and Boerwinkle, Eric and Fornage, Myriam and Jun, Goo and Yu, Bing} }