Common Variants in TRDN and CALM1 Are Associated with Risk of Sudden Cardiac Death in Chronic Heart Failure Patients in Chinese Han Population

PLoS One. 2015 Jul 21;10(7):e0132459. doi: 10.1371/journal.pone.0132459. eCollection 2015.

Abstract

Background: Recent studies suggest that variants in two calcium handling genes (RyR2 and CASQ2) associated with sudden cardiac death (SCD) and non-sudden cardiac death (NSCD) in subjects with heart failure and coronary artery disease, respectively. The purpose of this study was to identify other calcium handling genes associated with SCD in the long-term of chronic heart failure (CHF) in Chinese Han population.

Methods and results: We investigated 20 SNPs representing 10 genes that regulated calcium handling in 1429 patients with CHF, and the genetic association with SCD and all-cause death was analysed. During a median follow-up period of 63 months, 538 patients (37.65%) died from CHF, of whom 185 (34.38%) had SCD and the others were NSCD. SNPs that pass a P value cut-off of 0.0025 were considered as significant. We found that patients carrying the CC genotype of rs3814843 on CALM1 gene had greater risks of SCD (HR 5.542, 95% CI 2.054-14.948, P = .001) and all cause death (HR 3.484, 95% CI 1.651-7.350, P = .001). After adjusting for other risk factors, significant associations remained. Moreover, patients carrying G allele of rs361508 on TRDN gene also had increased risk of SCD.

Conclusions: Common variants in TRDN and CALM1 are associated with increased risk of SCD in patients with CHF. These findings provide further evidence for association of variants in calcium handling regulating proteins and SCD in chronic heart failure.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Calmodulin / genetics*
  • Carrier Proteins / genetics*
  • China / epidemiology
  • Death, Sudden, Cardiac / epidemiology*
  • Female
  • Heart Failure / epidemiology*
  • Heart Failure / genetics*
  • Humans
  • Male
  • Middle Aged
  • Muscle Proteins / genetics*
  • Polymorphism, Single Nucleotide*
  • Prospective Studies
  • Risk Factors

Substances

  • CALM1 protein, human
  • Calmodulin
  • Carrier Proteins
  • Muscle Proteins
  • TRDN protein, human

Grants and funding

This work was funded by National Basic Research Program of China (973 program projects, program number: 2013CB531105 to J. Pu).