Objective To investigate the expression of micro ribonucleic acid( microRNA)-1 in atherosclerotic plaque and the molecular mechanism regulating macrophage apoptosis via transforming growth factor-β2( TGF-β2) in mice. Methods Fifty Apo E-/- male mice of 5 weeks old were randomly divided into control group( n = 25) and atherosclerosis group( experimental group,n = 25). High fat feeding was given in experimental group to establish atherosclerosis experimental animal model,and normal feeding was given in contro...