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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Decreased platelet responsiveness to clopidogrel correlates with CYP2C19 and PON1 polymorphisms in atherosclerotic patients

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Author(s):
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J.F.M. Marchini [1] ; M.R. Pinto [2] ; G.C. Novaes [3] ; A.V. Badran [4] ; R.B. Pavão [5] ; G.L. Figueiredo [6] ; I.M. Lago [7] ; M.O. Lima-Filho [8] ; D.C. Lemos [9] ; M. Tonani [10] ; C.M. Antloga [11] ; L. Oliveira [12] ; J.C. Lorenzi [13] ; J.A. Marin-Neto [14]
Total Authors: 14
Affiliation:
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[1] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[2] Universidade de Uberaba. Departamento de Odontologia - Brasil
[3] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[4] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[5] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[6] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[7] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[8] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[9] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[10] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[11] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[12] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
[13] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Genética - Brasil
[14] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Clínica Médica - Brasil
Total Affiliations: 14
Document type: Journal article
Source: Brazilian Journal of Medical and Biological Research; v. 50, n. 1 2017-01-09.
Abstract

Clopidogrel and aspirin are the most commonly used medications worldwide for dual antiplatelet therapy after percutaneous coronary intervention. However, clopidogrel hyporesponsiveness related to gene polymorphisms is a concern. Populations with higher degrees of genetic admixture may have increased prevalence of clopidogrel hyporesponsiveness. To assess this, we genotyped CYP2C19, ABCB1, and PON1 in 187 patients who underwent percutaneous coronary intervention. Race was self-defined by patients. We also performed light transmission aggregometry with adenosine diphosphate (ADP) and arachidonic acid during dual antiplatelet therapy. We found a significant difference for presence of the CYP2C19*2 polymorphism between white and non-white patients. Although 7% of patients had platelet resistance to clopidogrel, this did not correlate with any of the tested genetic polymorphisms. We did not find platelet resistance to aspirin in this cohort. Multivariate analysis showed that patients with PON1 and CYP2C19 polymorphisms had higher light transmission after ADP aggregometry than patients with native alleles. There was no preponderance of any race in patients with higher light transmission aggregometry. In brief, PON1 and CYP2C19 polymorphisms were associated with lower clopidogrel responsiveness in this sample. Despite differences in CYP2C19 polymorphisms across white and non-white patients, genetic admixture by itself was not able to identify clopidogrel hyporesponsiveness. (AU)