SOD2 and coronary artery disorder: SOD2 mRNA was downregulated, while LXRα gene expression was upregulated in DM+CAD−, DM+CAD+, and DM−CAD+ groups compared to HS (P = 0.001, P = 0.03, and P = 0.001 for SOD2 and P = 0.006, P = 0.008, and P < 0.001 for LXRα, respectively).