TGFB1 and myocardial infarction: Abe et al. discovered that following myocardial infarction, Ly‐6Chigh macrophages release hypoxia‐inducible factor 1 (HIF‐1) in order to modulate the OSM gene, consequently impeding the activation of cardiac fibroblasts through the ERK1/2‐SMAD2‐TGFβ1 axis (Abe et al., 2019).