molecules Article Anticoagulant Activities of Indobufen, an Antiplatelet Drug Jia Liu 1,†, Dan Xu 2,†, Nian Xia 2, Kai Hou 2, Shijie Chen 2, Yu Wang 3,* and Yunman Li 2,* 1 Department of Marketing, Hangzhou Zhongmei Huadong Pharmaceutical Company, Hangzhou 310011, China;
[email protected] 2 State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University, Nanjing 210009, China;
[email protected] (D.X.);
[email protected] (N.X.);
[email protected] (K.H.);
[email protected] (S.C.) 3 Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Pharmacology, Nanjing Medical University, 140 Hanzhong Road, Nanjing 210029, China * Correspondence:
[email protected] (Y.W.);
[email protected] (Y.L.); Tel.: +86-25-8327-1173 (Y.L.) † These authors contributed equally to this work. Received: 27 April 2018; Accepted: 12 June 2018; Published: 15 June 2018 Abstract: Indobufen is a new generation of anti-platelet aggregation drug, but studies were not sufficient on its anticoagulant effects. In the present study, the anticoagulant activity of indobufen was determined by monitoring the activated partial thromboplastin time (APTT), prothrombin time (PT), and thrombin time (TT) in rabbit plasma. We evaluated the anticoagulant mechanisms on the content of the platelet factor 3,4 (PF3,4), and the coagulation factor 1, 2, 5, 8, 10 (FI, II, V, VIII, X) in rabbits, as well as the in vivo bleeding time and clotting time in mice. The pharmacodynamic differences between indobufen and warfarin sodium, rivaroxaban, and dabigatran were further studied on thrombus formation and the content of FII and FX in rats.