TNNI3 and myocardial infarction: Two hours post surgery, in comparation with sham group, cardiac troponin I (cTn I) concentration increased significantly in MI group (3.25 ± 0.53 ng/mL vs. 0.063 ± 0.02 ng/mL, MI vs. sham, n = 10 in each group, P < 0.05) and in DM + MI group (5.39 ± 0.96 ng/mL vs. 0.063 ± 0.02 ng/mL, DM + MI vs. Sham, n = 10 in each group, P < 0.01) (Fig. 1G).