Overcoming Clopidogrel Resistance: Discovery of Vicagrel as a Highly Potent and Orally Bioavailable Antiplatelet Agent
摘要:
A series of optically active 2-hydroxytetrahydrothienopyridine derivatives were designed and synthesized as prodrugs of clopidogrel thiolactone in order to overcome clopidogrel resistance. The final compounds were evaluated for their inhibitory effect on ADP-induced platelet aggregation in rats. Compound 9a was selected for further in vitro and in vivo metabolism studies, since its potency was comparable to that of prasugrel and was much higher than that of clopidogrel. Preliminary pharmacokinetic study results showed that the bioavailability of clopidogrel thiolactone generated from 9a was 6-fold higher than that generated from clopidogrel, implying a much lower clinically effective dose for 9a in comparison with clopidogrel. In summary, 9a (vicagrel) holds great promise as a more potent and a safer antiplatelet agent that might have the following advantages over clopidogrel: (1) no drug resistance for CYP2C19 poor metabolizers; (2) lower dose-related toxicity due to a much lower effective dose; (3) faster onset of action.
Optically active 2-hydroxy tetrahydrothienopyridine derivatives, preparation method and use in manufacture of medicament thereof
申请人:Sun Hongbin
公开号:US08772489B2
公开(公告)日:2014-07-08
Optically active 2-hydroxytetrahydrothienopyridine derivatives represented by Formula I and pharmaceutically acceptable salts, preparation method and use in the manufacture of a medicament thereof are disclosed. The pharmacodynamic experiment results show that the present compounds of Formula I are useful for inhibiting platelet aggregation. The pharmacokinetic experiment results show that the present compound of Formula I can be converted in vivo into pharmacologically active metabolites and are therefore useful for inhibiting platelet aggregation. Therefore, the present compounds are useful for the manufacture of a medicament for preventing or treating thrombosis and embolism related diseases.
METHODS FOR THE TREATMENT OR PROPHYLAXIS OF THROMBOSIS OR EMBOLISM
申请人:IPCA Laboratories Limited
公开号:US20140018331A1
公开(公告)日:2014-01-16
The present invention relates to a method of ameliorating the drawbacks of anti-platelet drug named clopidogrel. The method of the present invention comprises administration of an (S)oxo-clopidogrel or its derivative of the Formula IIA in its free or pharmaceutically acceptable salt form for alleviating the symptoms of thrombosis or embolism by inhibiting blood platelet aggregation. Compositions for use in such methods are also provided.
COMPOSITION FOR THE TREATMENT OR PROPHYLAXIS OF THROMBOSIS OR EMBOLISM
申请人:IPCA Laboratories Limited
公开号:US20150307513A1
公开(公告)日:2015-10-29
The description herein relates to a method of ameliorating the drawbacks of anti-platelet drug named clopidogrel. The method of the description herein comprises administration of an acyl derivative of the Formula IIA in its free or pharmaceutically acceptable salt form for alleviating the symptoms of thrombosis or embolism by inhibiting blood platelet aggregation. Compositions for use in such methods are also provided.