CDKN2B and atherosclerosis: RT-qPCR results demonstrated that the relative expression of CDKN2B-AS1 in atherosclerotic plaque tissues was significantly lower than that in non-atherosclerotic internal mammary artery (IMA) tissues (Figure 1A, p < 0.05), suggesting that CDKN2B-AS1 is downregulated in atherosclerosis.