• Peng Wang, Chun-Hua Luo, Qun-Xing Wang, Qian-Yuan Li, Peng Li, and Xiao-Hui Yuan.
• Department of Clinical Laboratory, The First College of Clinical Medical Science, China Three Gorges University, Yichang, China.
• J Res Med Sci. 2013 Aug 1; 18 (8): 704-6.

BackgroundThe objective of this study is to optimize the effective dose of heparin and ligustrazine hydrochloride injection (LHI) for drug combination.Materials And MethodsThe animal clinical study of LHI was performed by the rat's model of induced arteriovenous shunt thrombosis. Experimental animals were grouped into several groups and separately treated with both LHI (20, 40, 80 mg/kg, i.p.) and heparin (60, 55, and 50 U/kg; 5000 U/ml; Sigma, i.v). The study had used thrombus weight, protein concentration in thrombus homogenate, inhibition rate of thrombosis, and plasma anti-thrombin activity as indications.ResultsThe group combination (50, 80) got the result of 100% antithrombotic activity with 0 ± 0 mg of thrombus weight, 14 ± 3 μg/ml of protein concentration in thrombus homogenate and 1.5 ± 0.04 U/ml of plasma anti-thrombin activity. Its anti-thrombotic effect was much better than individual groups treated with LHI in a dose of 0 mg/kg and group of combination (0, 80) (P < 0.05) while antithrombotic effect of 55 and 60 U/kg heparin alone was only 37-58%. Therefore, the group of combination (50, 80) was optimal for 100% antithrombotic activity.ConclusionOptimal combined doses of LHI and heparin preventing blood coagulation were determined and the results were available. It may give some hint for the further clinical application on human.

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