As shown in Figure 8, compared with the SC group, the protein expression of NOS1 (F2,16 = 33.91, P<0.001) in the LV was significantly up-regulated after MI (P<0.01), while the expression of total NOS2 (F2,16 = 1.47, P = 0.251) and p-NOS2 (F2,16 = 11.30, P = 0.001) remained constant in the MI group. This evidence concerns the gene NOS1 and myocardial infarction.