A: Total collagen content by Sirius red staining in cardiac tissue of control (SD) animals. A: Total collagen content by Sirius red staining in cardiac tissue of control (SD) animals. B: Highly increased total collagen with cardiac and perivascular fibrosis in STZ-induced diabetes. C: Total collagen content of STZ, treated with the ICEI (STZICEI). Bars are displaying total collagen content according to Sirius red staining, as well as collagen type I and collagen type III. *Significantly different compared with control and STZICEI, with P < 0.05. Dirk Westermann et al. Diabetes 2007;56:1834-1841 ©2007 by American Diabetes Association