Catharina Hospital, Netherlands
Clopidogrel therapy is recommended to prevent recurrent ischemic stroke. However, clopidogrel resistance exists. This study examines which enzymes are involved in clopidogrel resistance. The study group includes 402 neurology patients who had experienced a recurrent ischemic stroke while receiving clopidogrel monotherapy. Patients were genotyped for CYP2C19, CYP2C9, CYP2B6, CYP3A4, CYP3A5, CYP1A2, ABCB1 and CES1A1. Phenotype frequencies were compared with those of a Global(G), European(E) and a local patient control(C) group. Only for ABCB1 a significant difference in phenotype distribution was seen (pG=0.003, pE=
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