Cellular composition of early-stage atherosclerotic plaque one month after treatment with a single dose of miR-145 micelles. (A) Immunohistochemistry of aortic root plaques for eYFP (green), α-SMA, CD68, RUNX2 (red), and nuclei (blue). Red boxes on H&E images indicate zoomed in areas of aortic root (bottom). Quantification of cells expressing (B) α-SMA+/DAPI, (C) α-SMA + YFP+/YFP+, (D) CD68+/DAPI, (E) CD68 + YFP+/YFP+, (F) RUNX2+/DAPI, and (G) RUNX2+YFP+/YFP+. VSMC marker expression with respect to YFP is used to analyze all VSMC-originating cells. * indicates p < 0.05, ** indicates p < 0.01.