Fig. 5

The expression level of a Ca²⁺, b cAMP, c NO, d iNOS, and e tNOS in the serum of each group was determined by ELISA (cAMP), Microwell plate method (Ca²⁺, NO) and Colorimetric method (iNOS, tNOS) after reperfusion for 22 h. Values are the mean ± SD (n = 8). Comparing model control group with sham surgery group, *P < 0.05, **P < 0.01; comparing treatment groups with model control group, ^#P < 0.05, ^##P < 0.01; comparing treatment groups with positive control group, ⁺P < 0.05, ⁺⁺P < 0.01; comparing PTS combined with aspirin group with PTS medium-dose group, ^▲P < 0.05, ^▲▲P < 0.01