BHB increases the expression of cholestene transporters and induces autophagy. (A–C,E) Representative immunofluorescence images of frozen sections of aortic roots from ApoE−/− mice. (A) ABCA1 stains (red) and DAPI nuclear stains (blue). Scale bars, 50 μm. (B) ABCG1 stains (red) and DAPI nuclear stains (blue). Scale bars, 50 μm. (C) SR-BI stains (red) and DAPI nuclear stains (blue). Scale bars, 50 μm. (E) LC3 stains (green), p62 stains (red), and DAPI nuclear stains (blue). Scale bars, 50 μm. (D,F) Quantification of immunofluorescence images (n = 6). Data are represented as means ± SEM. * p < 0.05, ** p < 0.01 vs. ND mice; # p < 0.05, ## p < 0.01 vs. WD mice.