[A study on preventive mechanisms of resveratrol on injuried heart during hepatic ischemia/reperfusion injury in rats by regulating Notch signaling pathway].

Objective: To study the role of Notch1 signaling pathway in the myocardial protective effects of resveratrol pro-treatment after hepatic ischemia/reperfusion injury.

Methods: Thirty-six healthy male SD rats were randomly divided into 3 groups:sham control (SC) group, hepatic ischemic/reperfusion (HIR) group, and pro-treatment resveratrol (Res) group,12 rats in each group. After each group with hepatic ischemia 40 min reperfusion 2 h (SC group placing equal time), the left ventricular function including left ventricular pressure (LVP), left ventricular systolic pressure (LVSP) and its derivate (±dp/dt) was measured; the serum activities of creatine kinase isoenzyme (CK-MB) and lactate dehydrogenase (LDH) and tumor necrosis factorα(TNF-α) and interleukin-6(IL-6) were detected. The activity of myocardial su-peroxide dismutase(SOD) and contents of myocardial malonaldehyde (MDA) were determined; Notch intracellular domain (NICD) expressions were detected with Western blot; the mRNA levels of Notch1 and TNF-αwere detected by real-time PCR.

Results: Compared with SC group, the left ventricular functions in the HIR group were significantly decreased. With decreasing the expression of NICD and Notchl, the activities of CK-MB, LDH, TNF-αand IL-6 in the serum were evidently increased(<0.01), the activity of SOD in myocardum was decreased and contents of MDA in myocardum was enhanced (<0.01). Compared with HIR group, the left ventricular functions were significantly en-hanced in Res group (<0.01). The above mentioned parameters in the serum in the Res group were evidently improved (<0.01), meanwhile the expression of NICD and Notchl were significantly enhanced whereas the expression of TNF-α was obviously decreased.

Conclusions: The findings indicate that resveratrol has protective effect on myocardial injury during the hepatic ischemia/reperfusion, and its mecha-nisms may be related to anti-inflammation and anti-oxidative stress Notch signaling pathway.