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Clinical outcomes associated with proton pump inhibitor use among clopidogrel-treated patients within CYP2C19 genotype groups following acute myocardial infarction

Abstract

We examined clinical outcomes with proton pump inhibitors (PPI) use within CYP2C19 genotype groups during clopidogrel treatment following acute myocardial infarction (AMI). 2062 patients were genotyped for CYP2C19*2 and *17 variants in TRIUMPH. 12 month clinical outcomes were analyzed among patients discharged on clopidogrel within CYP2C19*2 carrier, CYP2C19*17 carrier, and CYP2C19*1 homozygote genotype groups. PPI use was not associated with a difference in mortality. Among clopidogrel-treated Caucasians following AMI, PPI use was associated with a significantly higher rate of cardiac rehospitalization (HR 1.62, 95% CI 1.19–2.19; P=0.002) compared with no PPI use. PPI users who were carriers of the CYP2C19*17 variant experienced significantly higher rates of cardiac rehospitalization (HR 2.05, 95% CI 1.26–3.33; P=0.003), carriers of the CYP2C19*2 variant had a trend toward increased 1-year cardiac rehospitalization (HR 1.69, 95% CI 0.95–2.99; P=0.07), while no significant differences were observed among CYP2C19*1 homozygotes. These results indicate that the risks associated with PPI use among clopidogrel-treated Caucasian post-MI patients are impacted by CYP2C19 genotype, and suggest knowledge of genotype may be useful for personalizing PPI use among patients following AMI to reduce rehospitalization.

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Acknowledgements

This work and S. Cresci’s effort are supported in part by the National Institutes of Health (Cresci R01 NR013396). TRIUMPH was sponsored by the National Institutes of Health: Washington University School of Medicine SCCOR Grant P50 HL077113.

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Correspondence to S Cresci.

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Competing interests

TY Wang has received research grants from Lilly USA (significant), Daiichi Sankyo (significant) and Gilead Science (significant), and is a consultant to Astra Zeneca (modest), American College of Cardiology Foundation (significant). JA Spertus has received research grants from Eli Lilly, EveHeart, Genentech and Gilead, and is a consultant to St Jude Medical (modest), United Healthcare (modest), Amgen (modest), Gilead (modest), Genentech (modest), Janssen (modest) and Novartis (modest). Copyrights/Patents apply to Seattle Angina Questionnaire, Kansas City Cardiomyopathy Questionnaire and Peripheral Artery Questionnaire. US Patents: 7,643,969; 7,853,456; 12/965,656; and 13/615,401. RG Bach has received research grants from AstraZeneca, Eli Lilly, Bristol-Myers Squibb and Merck/Schering-Plough, and is a consultant (CEC activity only) to Roche (significant), Pfizer (modest). The remaining authors declare no conflict of interest.

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Depta, J., Lenzini, P., Lanfear, D. et al. Clinical outcomes associated with proton pump inhibitor use among clopidogrel-treated patients within CYP2C19 genotype groups following acute myocardial infarction. Pharmacogenomics J 15, 20–25 (2015). https://doi.org/10.1038/tpj.2014.28

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