Despite advances in diagnosis and treatment, cardiovascular disease remains the leading cause of death worldwide. Single-nucleotide polymorphisms (SNPs) in microRNAs are known to play important roles in acute coronary syndrome (ACS). MicroRNA 146a (miR-146a) is significantly upregulated in human atherosclerotic plaques and its circulating levels are elevated in patients with ACS, and was thus the focus of a recent study.