Genome-wide and candidate gene approaches of clopidogrel efficacy using pharmacodynamic and clinical end points-Rationale and design of the International Clopidogrel Pharmacogenomics Consortium (ICPC).

Bergmeijer, Thomas O; Reny, Jean-Luc; Pakyz, Ruth E; Gong, Li; Lewis, Joshua P; Kim, Eun-Young; Aradi, Daniel; Fernandez-Cadenas, Israel; Horenstein, Richard B; Lee, Ming Ta Michael; Whaley, Ryan M; Montaner, Joan; Gensini, Gian Franco; Cleator, John H; Chang, Kiyuk; Holmvang, Lene; Hochholzer, Willibald; Roden, Dan M; Winter, Stefan; Altman, Russ B; ... (2018). Genome-wide and candidate gene approaches of clopidogrel efficacy using pharmacodynamic and clinical end points-Rationale and design of the International Clopidogrel Pharmacogenomics Consortium (ICPC). American Heart Journal, 198, pp. 152-159. Elsevier 10.1016/j.ahj.2017.12.010

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RATIONALE The P2Y receptor inhibitor clopidogrel is widely used in patients with acute coronary syndrome, percutaneous coronary intervention, or ischemic stroke. Platelet inhibition by clopidogrel shows wide interpatient variability, and high on-treatment platelet reactivity is a risk factor for atherothrombotic events, particularly in high-risk populations. CYP2C19 polymorphism plays an important role in this variability, but heritability estimates suggest that additional genetic variants remain unidentified. The aim of the International Clopidogrel Pharmacogenomics Consortium (ICPC) is to identify genetic determinants of clopidogrel pharmacodynamics and clinical response. STUDY DESIGN Based on the data published on www.clinicaltrials.gov, clopidogrel intervention studies containing genetic and platelet function data were identified for participation. Lead investigators were invited to share DNA samples, platelet function test results, patient characteristics, and cardiovascular outcomes to perform candidate gene and genome-wide studies. RESULTS In total, 17 study sites from 13 countries participate in the ICPC, contributing individual patient data from 8,829 patients. Available adenosine diphosphate-stimulated platelet function tests included vasodilator-stimulated phosphoprotein assay, light transmittance aggregometry, and the VerifyNow P2Y assay. A proof-of-principle analysis based on genotype data provided by each group showed a strong and consistent association between CYP2C19*2 and platelet reactivity (P value=5.1 × 10). CONCLUSION The ICPC aims to identify new loci influencing clopidogrel efficacy by using state-of-the-art genetic approaches in a large cohort of clopidogrel-treated patients to better understand the genetic basis of on-treatment response variability.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Cardiovascular Disorders (DHGE) > Clinic of Cardiology

UniBE Contributor:

Valgimigli, Marco

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0002-8703

Publisher:

Elsevier

Language:

English

Submitter:

Amanda Valle

Date Deposited:

02 Aug 2018 14:41

Last Modified:

02 Aug 2018 14:41

Publisher DOI:

10.1016/j.ahj.2017.12.010

PubMed ID:

29653637

BORIS DOI:

10.7892/boris.119022

URI:

https://boris.unibe.ch/id/eprint/119022

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