PPT1 and inflammatory response: A previous study reported that macrophage‐fibroblast crosstalk plays an important role in the pathophysiology of cardiac inflammation and fibrosis.[27] To further investigate the role of PPT1‐expressing macrophages in myocardial fibrosis, conditioned medium (CM) from M1 macrophages was harvested and added to cardiac fibroblasts (Figure S8A, Supporting Information).