MSR1 and atherosclerosis: The anti-proliferative effect of CD45.2 Msr1−/− and Cd36−/− macrophages versus CD45.1 WT macrophages appeared to increase during disease progression; furthermore, whereas changes in chimerism were observed in aortic macrophages in late atherosclerosis, no alteration in chimerism in aortic macrophages was seen in early atherosclerosis.