[Effects of effective components compatibility of aqueous extracts of Salviae Miltiorrhizae and Rhizoma Chuanxiong on rat myocardial ischemia/reperfusion injury].

Objective: To observe effects of effective components compatibility of aqueous extracts of Salviae Miltiorrhizae and Rhizoma Chuanxiong on myocardial ischemia/reperfusion (I/R) injury in rat.

Methods: Sprague-Dawley (SD) rats were randomly divided into sham group, model group, Guanxinning injection group and effective components of aqueous extracts from Salviae Miltiorrhizae and Rhizoma Chuanxiong salvianolic low dose group and high dose group, with 10 rats in each group. The myocardial I/R injury model was reproduced by ligation of the left anterior descending artery, and the experimental drugs were injected intravenously via femoral vein at 10 minutes after ligation. 2.88 g/kg Guanxinning injection was given in Guanxinning group, and 2.43 g/kg or 4.86 g/kg effective components of aqueous extracts of Salviae Miltiorrhizae and Rhizoma Chuanxiong salvianolic was given in low dose group and high dose group, respectively, and equal volume of normal saline was given in sham group and model group. The anesthetic rats were sacrificed 40 minutes after ischemia and 120 minutes of reperfusion. Blood samples were collected before rats were sacrificed. The contents of serum troponin T (cTnT) and MB isoenzyme of creatine kinase (CK-MB) were determined, 6-keto-prostaglandin F(1 alpha) (6-keto-PGF(1 alpha)), thromboxane B(2) (TXB(2)) and platelet aggregation rate in blood plasma were assessed, and the degree of myocardial infarction in rats was determined.

Results: The myocardial infarction size in combined Salviae Miltiorrhizae and Rhizoma Chuanxiong low dose group and high dose group [(23.0+/-3.8)%, (20.8+/-4.7)%] were lower significantly than that in model group [(29.1+/-3.2)%, P<0.05 and P<0.01], the contents of serum cTnT [(0.78+/-0.29) mg/L, (0.76+/-0.29) mg/L] and CK-MB [(891.5+/-252.5) U/L, (759.5+/-191.3) U/L] were lower significantly than those in model group [(1.04+/-0.14) mg/L, (1 268.2+/-256.5) U/L, all P<0.05]. The level of 6-keto-PGF(1 alpha) was higher significantly in high dose of the combination group than that in model group [(206.7+/-35.6) ng/L vs. (138.6+/-28.9) ng/L, P<0.05], and platelet aggregation rate was inhibited significantly [(49.4+/-9.3)% vs. (77.1+/-16.7)%, P<0.05].

Conclusion: Effective components compatibility of aqueous extracts from Salviae Miltiorrhizae and Rhizoma Chuanxiong may reduce significantly the size of myocardial infarct and blood content of myocardial enzyme CK-MB and cTnT, and increase the ratio of 6-keto-PGF(1 alpha)/TXB(2), thus reducing myocardial I/R injury.