Adrenergic receptor polymorphisms and platelet reactivity after treatment with dual antiplatelet therapy with aspirin and clopidogrel in acute coronary syndrome

Thomas Cuisset; Michalis Hamilos; Leen Delrue; Corinne Frere; Katia Verhamme; Jozef Bartunek; Noemie Saut; Jean Louis Bonnet; Mark Eijgelsheim; William Wijns; Marie-Christine Alessi; Emanuele Barbato

doi:10.1160/TH09-06-0355

Thrombosis and Haemostasis, Table of Contents

Thromb Haemost 2010; 103(04): 774-779
DOI: 10.1160/TH09-06-0355

Platelets and Blood Cells

Schattauer GmbH

Adrenergic receptor polymorphisms and platelet reactivity after treatment with dual antiplatelet therapy with aspirin and clopidogrel in acute coronary syndrome

Thomas Cuisset

¹Département de Cardiologie, CHU Timone, Marseille, France

²Inserm, U626, Faculté de Médecine, Marseille, France

⁴Cardiovascular Center OLV Aalst, Belgium

,

Michalis Hamilos

⁴Cardiovascular Center OLV Aalst, Belgium

,

Leen Delrue

⁴Cardiovascular Center OLV Aalst, Belgium

,

Corinne Frere

¹Département de Cardiologie, CHU Timone, Marseille, France

²Inserm, U626, Faculté de Médecine, Marseille, France

,

Katia Verhamme

³Department of Epidemiology, Erasmus MC, Rotterdam, The Netherlands

,

Jozef Bartunek

⁴Cardiovascular Center OLV Aalst, Belgium

,

Noemie Saut

¹Département de Cardiologie, CHU Timone, Marseille, France

²Inserm, U626, Faculté de Médecine, Marseille, France

,

Jean Louis Bonnet

¹Département de Cardiologie, CHU Timone, Marseille, France

²Inserm, U626, Faculté de Médecine, Marseille, France

,

Mark Eijgelsheim

³Department of Epidemiology, Erasmus MC, Rotterdam, The Netherlands

,

William Wijns

⁴Cardiovascular Center OLV Aalst, Belgium

,

Marie-Christine Alessi

¹Département de Cardiologie, CHU Timone, Marseille, France

²Inserm, U626, Faculté de Médecine, Marseille, France

,

Emanuele Barbato

⁴Cardiovascular Center OLV Aalst, Belgium

› Author Affiliations

Abstract

Summary

Platelet response to clopidogrel shows inter-individual variability that is partially explained by genetic polymorphisms. This variability affects clinical outcome when clopidogrel is administered in patients with acute coronary syndrome (ACS). Catecholamines, released during ACS, contribute to platelet aggregation through platelet α_2A- (α_2A-AR) and β₂-adrenergic receptor (β₂-AR) stimulation. It was the objective of this study to assess the potential influence of α_2A-AR and β₂-AR gene polymorphisms on platelet reactivity after dual antiplatelet therapy with aspirin and clopidogrel in ACS. We screened 641 ACS patients for 6.3/6.7 kb α_2A-AR polymorphism, and for Arg16Gly and Gln27Glu β₂-AR polymorphism. After 600 mg clopidogrel, we assessed ADP 10 μmol-induced platelet aggregation (ADP-Ag) and vasoactive stimulated phosphoprotein (VASP). All single nucleotide polymorphisms were in Hardy-Weinberg equilibrium. A slight though negligible association was found between 6.3 kb allele of α_2A-AR with platelet reactivity ADPAg induced (beta: –2.91 [-5.68;-0.14], p=0.04). A borderline not significant reduction in PRI VASP was observed in 6.3 kb α_2A-AR carriers (beta: –3.81 [-0.09;7.72], p=0.06). No significant effect on platelet parameters was observed for the other tested polymorphisms. Common α_2A- and β₂-adrenergic receptor polymorphisms do not show any major impact on residual platelet reactivity in non-ST-elevation ACS when a dual antiplatelet therapy with 250 mg aspirin and 600 mg clopidogrel is administered.

Keywords

Antiplatelet agents - coronary syndrome - single nucleotide polymorphisms

Full Text

References

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