Verhoef Talitha I, Redekop William K, Daly Ann K, van Schie Rianne M F, de Boer Anthonius, Maitland-van der Zee Anke-Hilse
Department of Pharmaceutical Sciences, Division of Pharmacoepidemiology and Clinical Pharmacology, Utrecht University, Utrecht.
Br J Clin Pharmacol. 2014 Apr;77(4):626-41. doi: 10.1111/bcp.12220.
Coumarin derivatives, such as warfarin, acenocoumarol and phenprocoumon are frequently prescribed oral anticoagulants to treat and prevent thromboembolism. Because there is a large inter-individual and intra-individual variability in dose-response and a small therapeutic window, treatment with coumarin derivatives is challenging. Certain polymorphisms in CYP2C9 and VKORC1 are associated with lower dose requirements and a higher risk of bleeding. In this review we describe the use of different coumarin derivatives, pharmacokinetic characteristics of these drugs and differences amongst the coumarins. We also describe the current clinical challenges and the role of pharmacogenetic factors. These genetic factors are used to develop dosing algorithms and can be used to predict the right coumarin dose. The effectiveness of this new dosing strategy is currently being investigated in clinical trials.
香豆素衍生物,如华法林、醋硝香豆素和苯丙香豆素,是常用的口服抗凝剂,用于治疗和预防血栓栓塞。由于个体间和个体内剂量反应存在很大差异,且治疗窗较窄,使用香豆素衍生物进行治疗具有挑战性。细胞色素P450 2C9(CYP2C9)和维生素K环氧化物还原酶复合体1(VKORC1)的某些基因多态性与较低的剂量需求和较高的出血风险相关。在本综述中,我们描述了不同香豆素衍生物的使用、这些药物的药代动力学特征以及香豆素之间的差异。我们还描述了当前的临床挑战以及药物遗传学因素的作用。这些遗传因素被用于制定给药算法,并可用于预测合适的香豆素剂量。这种新给药策略的有效性目前正在临床试验中进行研究。