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Genomewide Association Study of Platelet Reactivity and Cardiovascular Response in Patients Treated With Clopidogrel: A Study by the International Clopidogrel Pharmacogenomics Consortium

  • for the ICPC Investigators
  • University of Pennsylvania
  • St. Antonius Center for Platelet Function Research
  • Stanford University
  • Béziers Hospital
  • University of Geneva
  • University of Maryland, Baltimore
  • Department of Veterans Affairs
  • National and Kapodistrian University of Athens
  • Heart Center Balatonfüred
  • Sinai Hospital of Baltimore
  • Az. Osp. Universitaria Sant' Anna
  • Vanderbilt University
  • Institut Universitaire de Cardiologie et de Pneumologie de Quebec - Université Laval
  • University of Copenhagen
  • Research Institute of the Santa Creu i Sant Pau Hospital
  • University of Tübingen
  • University of Florence
  • University of Freiburg
  • Inje University
  • Vall d'Hebron Research Institute
  • Robert Bosch Foundation
  • Medical University of Vienna
  • Medical University of Warsaw
  • University of Bern
  • Pennsylvania State University
  • Chang Gung University
  • RIKEN
  • Genomic Medicine Institute

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Antiplatelet response to clopidogrel shows wide variation, and poor response is correlated with adverse clinical outcomes. CYP2C19 loss-of-function alleles play an important role in this response, but account for only a small proportion of variability in response to clopidogrel. An aim of the International Clopidogrel Pharmacogenomics Consortium (ICPC) is to identify other genetic determinants of clopidogrel pharmacodynamics and clinical response. A genomewide association study (GWAS) was performed using DNA from 2,750 European ancestry individuals, using adenosine diphosphate-induced platelet reactivity and major cardiovascular and cerebrovascular events as outcome parameters. GWAS for platelet reactivity revealed a strong signal for CYP2C19*2 (P value = 1.67e−33). After correction for CYP2C19*2 no other single-nucleotide polymorphism reached genomewide significance. GWAS for a combined clinical end point of cardiovascular death, myocardial infarction, or stroke (5.0% event rate), or a combined end point of cardiovascular death or myocardial infarction (4.7% event rate) showed no significant results, although in coronary artery disease, percutaneous coronary intervention, and acute coronary syndrome subgroups, mutations in SCOS5P1, CDC42BPA, and CTRAC1 showed genomewide significance (lowest P values: 1.07e−09, 4.53e−08, and 2.60e−10, respectively). CYP2C19*2 is the strongest genetic determinant of on-clopidogrel platelet reactivity. We identified three novel associations in clinical outcome subgroups, suggestive for each of these outcomes.

Original languageEnglish
Pages (from-to)1067-1077
Number of pages11
JournalClinical Pharmacology and Therapeutics
Volume108
Issue number5
DOIs
StatePublished - 1 Nov 2020

Bibliographical note

Publisher Copyright:
© 2020 The Authors. Clinical Pharmacology & Therapeutics published by Wiley Periodicals LLC on behalf of American Society for Clinical Pharmacology and Therapeutics.

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