ARNT and acute myocardial infarction: Gao et al. [15] investigate the effects of Rhodiola rosea on angiogenesis and expressions of hypoxia-inducible factor 1alpha (HIF-1α), hypoxia-inducible factor 1beta (HIF-1β), and vascular endothelial growth factor (VEGF) in the myocardium of rats with acute myocardial infarction (AMI).