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Clinical Pharmacogenetics Implementation Consortium Guidelines for CYP2C19 Genotype and Clopidogrel Therapy: 2013 Update

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TLDR
In this article, an expanded literature review showed that CYP2C19 loss-of-function alleles confer increased risks for serious adverse cardiovascular (CV) events among clopidogrel-treated patients with acute coronary syndromes (ACSs) undergoing percutaneous coronary intervention (PCI).
Abstract
Cytochrome P450 (CYP)2C19 catalyzes the bioactivation of the antiplatelet prodrug clopidogrel, and CYP2C19 loss-of-function alleles impair formation of active metabolites, resulting in reduced platelet inhibition. In addition, CYP2C19 loss-of-function alleles confer increased risks for serious adverse cardiovascular (CV) events among clopidogrel-treated patients with acute coronary syndromes (ACSs) undergoing percutaneous coronary intervention (PCI). Guideline updates include emphasis on appropriate indication for CYP2C19 genotype–directed antiplatelet therapy, refined recommendations for specific CYP2C19 alleles, and additional evidence from an expanded literature review (updates at http://www.pharmgkb.org).

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Preemptive Clinical Pharmacogenetics Implementation: Current Programs in Five US Medical Centers

TL;DR: Current programs that use preemptive genotyping to optimize the pharmacotherapy of patients are discussed and key processes for implementation are highlighted, including clinical decision support.
References
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Journal ArticleDOI

Cytochrome P450 2C19*2 polymorphism and cardiovascular recurrences in patients taking clopidogrel: a meta-analysis.

TL;DR: A meta-analysis of all the prospective studies that have been published, carried out on nearly 8000 patients with CAD undergoing clopidogrel treatment, shows that the CYP2C19*2 polymorphism is associated with an increased risk of major adverse cardiovascular events and stent thrombosis.
Journal ArticleDOI

PharmGKB summary: very important pharmacogene information for cytochrome P450, family 2, subfamily C, polypeptide 8.

TL;DR: This PharmGKB summary briefly discusses the CYP2C19 gene and current understanding of its function, regulation, and pharmacogenomic relevance.
Journal ArticleDOI

Protective effect of the CYP2C19 *17 polymorphism with increased activation of clopidogrel on cardiovascular events

TL;DR: Based on the genetic analysis in a high-risk population of acute MI patients with interventional treatment and continuous clopidogrel therapy, a protective effect for carriers of an increased-function CYP2C19*17 T-allele with significantly lower rates of TLR and MACE is found.
Journal ArticleDOI

Meta-analyses of the association between cytochrome CYP2C19 loss- and gain-of-function polymorphisms and cardiovascular outcomes in patients with coronary artery disease treated with clopidogrel

TL;DR: The results question the relevance of the CYP2C19 loss-of-function alleles in the prediction of major cardiovascular events beyond stent thrombosis in coronary patients treated with clopidogrel.
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