TY - JOUR TI - Genomewide Association Study of Platelet Reactivity and Cardiovascular Response in Patients Treated With Clopidogrel: A Study by the International Clopidogrel Pharmacogenomics Consortium AU - Verma, S.S. AU - Bergmeijer, T.O. AU - Gong, L. AU - Reny, J.-L. AU - Lewis, J.P. AU - Mitchell, B.D. AU - Alexopoulos, D. AU - Aradi, D. AU - Altman, R.B. AU - Bliden, K. AU - Bradford, Y. AU - Campo, G. AU - Chang, K. AU - Cleator, J.H. AU - Déry, J.-P. AU - Dridi, N.P. AU - Fernandez-Cadenas, I. AU - Fontana, P. AU - Gawaz, M. AU - Geisler, T. AU - Gensini, G.F. AU - Giusti, B. AU - Gurbel, P.A. AU - Hochholzer, W. AU - Holmvang, L. AU - Kim, E.-Y. AU - Kim, H.-S. AU - Marcucci, R. AU - Montaner, J. AU - Backman, J.D. AU - Pakyz, R.E. AU - Roden, D.M. AU - Schaeffeler, E. AU - Schwab, M. AU - Shin, J.G. AU - Siller-Matula, J.M. AU - ten Berg, J.M. AU - Trenk, D. AU - Valgimigli, M. AU - Wallace, J. AU - Wen, M.-S. AU - Kubo, M. AU - Lee, M.T.M. AU - Whaley, R. AU - Winter, S. AU - Klein, T.E. AU - Shuldiner, A.R. AU - Ritchie, M.D. AU - for the ICPC Investigators JO - International Journal of Clinical Pharmacology and Therapeutics PY - 2020 VL - 108 TODO - 5 SP - 1067-1077 PB - Nature Publishing Group SN - 0946-1965 TODO - 10.1002/cpt.1911 TODO - adenosine diphosphate; clopidogrel; cytochrome P450 2C19; DNA; antithrombocytic agent; clopidogrel; CYP2C19 protein, human; cytochrome P450 2C19, acute coronary syndrome; adult; allele; Article; cardiovascular disease; cardiovascular response; cerebrovascular accident; chromosome; clinical outcome; coronary artery disease; female; gene locus; genome-wide association study; heart infarction; human; loading drug dose; major clinical study; male; middle aged; percutaneous coronary intervention; pharmacogenomics; phenotype; platelet reactivity; priority journal; single nucleotide polymorphism; adverse event; aged; blood; cardiovascular disease; clinical trial; coronary artery disease; drug effect; genetics; genome-wide association study; metabolism; mortality; multicenter study; percutaneous coronary intervention; pharmacogenetic variant; pharmacogenetics; risk assessment; risk factor; single nucleotide polymorphism; thrombocyte; treatment outcome, Aged; Blood Platelets; Cardiovascular Diseases; Clopidogrel; Coronary Artery Disease; Cytochrome P-450 CYP2C19; Female; Genome-Wide Association Study; Humans; Male; Middle Aged; Percutaneous Coronary Intervention; Pharmacogenetics; Pharmacogenomic Variants; Platelet Aggregation Inhibitors; Polymorphism, Single Nucleotide; Risk Assessment; Risk Factors; Treatment Outcome TODO - 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. © 2020 The Authors. Clinical Pharmacology & Therapeutics published by Wiley Periodicals LLC on behalf of American Society for Clinical Pharmacology and Therapeutics. ER -