Effect of cytochrome p450 polymorphisms on platelet reactivity after treatment with clopidogrel in acute coronary syndrome.

Abstract

Genetic polymorphisms of cytochrome P450 (CYP) isoforms may promote variability in platelet response to clopidogrel. This study was conducted to analyze, in 603 patients with non-ST elevation acute coronary syndromes, the effect of CYP3A4, CYP3A5, and CYP2C19 gene polymorphisms on clopidogrel response and post-treatment platelet reactivity assessed by adenosine diphosphate (ADP)-induced platelet aggregation, vasodilator-stimulated phosphoprotein phosphorylation index, and ADP-induced P-selectin expression. The CYP2C19*2 polymorphism was significantly associated with ADP-induced platelet aggregation, vasodilator-stimulated phosphoprotein phosphorylation index, and ADP-induced P-selectin expression in recessive (p <0.01, p <0.007, and p <0.06, respectively) and codominant (p <0.08, p <0.0001, and p <0.009, respectively) models, but the CYP3A4*1B and CYP3A5*3 polymorphisms were not. The CYP2C19*2 allele carriers exhibited the highest platelet index levels in multivariate analysis (p = 0.03). After covariate adjustment, the CYP2C19*2 allele was more frequent in clopidogrel nonresponders, defined by persistent high post-treatment platelet reactivity (ADP-induced platelet aggregation >70%; p = 0.03). In conclusion, the present data suggest that the CYPC19*2 allele influences post-treatment platelet reactivity and clopidogrel response in patients with non-ST elevation acute coronary syndromes.

• Authors: Corinne Frere, Thomas Cuisset, Pierre-Emmanuel Morange, Jacques Quilici, Laurence Camoin-Jau, Noémie Saut, Dorothee Faille, Marc Lambert, Irène Juhan-Vague, Jean-Louis Bonnet, Marie-Christine Alessi
• Journal: The American journal of cardiology (Am J Cardiol) Vol. 101 Issue 8 Pg. 1088-93 (Apr 15 2008) ISSN: 0002-9149 [Print] United States
• PMID: 18394438 (Publication Type: Journal Article)

Chemical References

• Cell Adhesion Molecules
• Microfilament Proteins
• P-Selectin
• Phosphoproteins
• Platelet Aggregation Inhibitors
• vasodilator-stimulated phosphoprotein
• Adenosine Diphosphate
• Cytochrome P-450 Enzyme System
• Clopidogrel
• Ticlopidine

Topics

• Acute Coronary Syndrome (drug therapy)
• Adenosine Diphosphate
• Alleles
• Body Mass Index
• Cell Adhesion Molecules (metabolism)
• Clopidogrel
• Cytochrome P-450 Enzyme System (genetics)
• Drug Resistance (genetics)
• Female
• Heterozygote
• Humans
• Male
• Microfilament Proteins (metabolism)
• Middle Aged
• P-Selectin (metabolism)
• Phosphoproteins (metabolism)
• Phosphorylation
• Platelet Activation (genetics)
• Platelet Aggregation Inhibitors (therapeutic use)
• Polymorphism, Single Nucleotide
• Prospective Studies
• Ticlopidine (analogs & derivatives, therapeutic use)