Abstract
Purpose: To investigate the mitigative impact of danshensu on heart tissues in acute myocardial infarction (AMI) rats, and the mechanism of action involved.
 Methods: Seventy-five male Sprague-Dawley (SD) rats were used in this study. After successful induction of myocardial infarction, the rats were divided into model group (MG), low-dose danshensu group (LDG; 15 mg/kg), middle-dose danshensu group (MDG; 30 mg/kg), and high-dose danshensu group (HDG; 60 mg/kg), with 15 rats per group. Rats in sham group (SG; n = 15) served as control. Serum levels of biochemical indicators and expressions of various proteins in myocardial tissue were determined using Western blotting, and compared amongst the rat groups.
 Results: Serum cTnI concentrations in MDG and HDG were significantly decreased, relative to the corresponding concentrations in MDG. There were significantly lower serum concentrations of IL-1 in MDG and HDG than in model rats. Rats in HDG had lower serum IL-6 concentration than MG rats, while TNF-α levels were down-regulated in MDG and HDG, relative to MG (p < 0.05).
 Conclusion: Danshensu protects the heart function of rats with AMI by decreasing inflammationderived cells and mitigating myocardial fibrosis. Thus, it may be useful in the management of AMI in humans but clinical trials are necessary to ascertain this.
 Keywords: Danshens; Acute myocardial infarction; Myocardial ischemia-reperfusion; Myocardial fibrosis
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