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3,4,5,6-Tetrahydroxyxanthone Protects Against Myocardial Ischemia-Reperfusion Injury in Rats

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Abstract

In the present study, we tested the protective effect of 3,4,5,6-tetrahydroxyxanthone, a synthetic xanthone derivative, on myocardial ischemia-reperfusion injury in rats. Ischemia-reperfusion injury was induced by 30 min of global ischemia and 30 min of reperfusion in isolated rat hearts or 30 min coronary artery occlusion and 120 min reperfusion in vivo, respectively. Heart rate, coronary flow (CF), left ventricular pressure (LVP), and its first derivative (±dp/dt max) were recorded, and the activity of creatine kinase in coronary effluent and tumor necrosis factor-alpha (TNF-α) content in myocardial tissues were measured in vitro. The activity of serum creatine kinase, the level of TNF-α and interleukin-6 (IL-6), and myocardial infarct size were measured in vivo. 3,4,5,6-tetrahydroxyxanthone (30, 100 or 300 μM) caused a significant improvement of cardiac function (LVP and ±dp/dt max) and a decrease in the release of creatine kinase in coronary effluent as well as the level of TNF-α in myocardial tissues in vitro. 3,4,5,6-tetrahydroxyxanthone (0.5 or 1.0 mg/kg, i.v.) also markedly decreased infarct size and the release of creatine kinase and TNF-α, and increased serum IL-6 level in vivo. These results suggest that 3,4,5,6-tetrahydroxyxanthone possesses a protective effect on myocardial ischemia-reperfusion injury, and that the protective effects of 3,4,5,6-tetrahydroxyxanthone may be related to inhibition of TNF-α production and stimulation of IL-6 generation by inhibition of ROS production.

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Dai, Z., Jiang, DJ., Hu, GY. et al. 3,4,5,6-Tetrahydroxyxanthone Protects Against Myocardial Ischemia-Reperfusion Injury in Rats. Cardiovasc Drugs Ther 18, 279–288 (2004). https://doi.org/10.1023/B:CARD.0000041247.95545.55

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