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In vitro flow and optical coherence tomography comparison of two bailout techniques after failed provisional stenting for bifurcation percutaneous coronary interventions 2019 Guidelines on Diabetes, Pre-Diabetes and Cardiovascular Diseases developed in collaboration with the EASD ESC Clinical Practice Guidelines New-onset atrial fibrillation after PCI and CABG for left main disease: insights from the EXCEL trial and additional studies Polymer-based or Polymer-free Stents in Patients at High Bleeding Risk Adenosine and adenosine receptor-mediated action in coronary microcirculation Impact of SYNTAX Score on 10-Year Outcomes After Revascularization for Left Main Coronary Artery Disease Safety and efficacy of the bioabsorbable polymer everolimus-eluting stent versus durable polymer drug-eluting stents in high-risk patients undergoing PCI: TWILIGHT-SYNERGY Left Main Percutaneous Coronary Intervention Versus Coronary Artery Bypass Grafting in Patients With Prior Cerebrovascular Disease: Results From the EXCEL Trial Inhibition of Platelet Aggregation After Coronary Stenting in Patients Receiving Oral Anticoagulation A Platelet Function Modulator of Thrombin Activation Is Causally Linked to Cardiovascular Disease and Affects PAR4 Receptor Signaling

Review Article12 (4), e007811

JOURNAL:Circulation. Article Link

Clopidogrel Pharmacogenetics: State-of-the-Art Review and the TAILOR-PCI Study

NL Pereira, CS Rihal, DYF So et al. Keywords: clinical trial; clopidogrel; cytochrome P450 CYP2C19; drug labeling; genetics; humans; pharmacogenetics

ABSTRACT


Common genetic variation in CYP2C19 (cytochrome P450, family 2, subfamily C, polypeptide 19) *2 and *3 alleles leads to a loss of functional protein, and carriers of these loss-of-function alleles when treated with clopidogrel have significantly reduced clopidogrel active metabolite levels and high on-treatment platelet reactivity resulting in increased risk of major adverse cardiovascular events, especially after percutaneous coronary intervention. The Food and Drug Administration has issued a black box warning advising practitioners to consider alternative treatment in CYP2C19 poor metabolizers who might receive clopidogrel and to identify such patients by genotyping. However, routine clinical use of genotyping for CYP2C19 loss-of-function alleles in patients undergoing percutaneous coronary intervention is not recommended by clinical guidelines because of lack of prospective evidence. To address this critical gap, TAILOR-PCI (Tailored Antiplatelet Initiation to Lessen Outcomes due to Decreased Clopidogrel Response After Percutaneous Coronary Intervention) is a large, pragmatic, randomized trial comparing point-of-care genotype-guided antiplatelet therapy with routine care to determine whether identifying CYP2C19 loss-of-function allele patients prospectively and prescribing alternative antiplatelet therapy is beneficial.