SOD2 and diabetes mellitus: In this regard, we have analyzed SOD2 and LXRα gene expression and HA plasmatic concentrations in a group of 20 diabetic patients with known CAD (DM+CAD+), 20 non-diabetic patients with CAD (DM−CAD+), 10 diabetic non-CAD patients (DM+CAD−), and 20 non-diabetic healthy subjects (HS).