The influence of lung ischemia-reperfusion injury on myocardium.

OBJECT To investigate the effect of lung Ischemia-reperfusion injury on cardiac muscle. METHODS SD rats were randomly divided into the following four groups: sham operation group (TS group); experimental control group (TG group); curcumin group (TC group); dexamethasone group (TM group). After 4 h and 24 h of lung ischemia-reperfusion, the cardiac muscle was collected. We measured the concentrations of TNF-α, IL-6, caspase-3, antioxidant capacity and neutrophil infiltration in myocardial tissue. RESULTS After lung ischemia-reperfusion 4 h, TNF-α, IL-6 levels, MDA and neutriphils infiltration increased in myocardial tissue in control group, total antioxidant capacity decreased, and caspase-3 exhibited no significant changes. However, 24 h after reperfusion, there were no significant difference between the sham group and experimental group. CONCLUSION Lung ischemia-reperfusion injury affected the function of cardiac muscle, especially 4 h after reperfusion. Curcumin and dexamethasone effectively protected myocardial injury after lung ischemia-reperfusion.