MMP9 and atherosclerosis: Apart from the modulation of macrophage efferocytosis, we also found the decreased expression of matrix metalloproteinase 9 (MMP-9), an inflammatory mediator of atherosclerosis,51 in miR-143/145 inhibitory macrophages (Fig. S7a), further suggesting the beneficial effect on reduction of atherosclerosis by downregulating miR-143/145 in macrophages.