Genetic determinants of response to aspirin: appraisal of 4 candidate genes |
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Authors: | Lordkipanidzé Marie Diodati Jean G Palisaitis Donald A Schampaert Erick Turgeon Jacques Pharand Chantal |
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Institution: | a Faculty of Pharmacy, Université de Montréal, C.P. 6128, succ. Centre-ville, Montréal, Québec, Canada H3C 3J7b Faculty of Medicine, Université de Montréal, C.P. 6128, succ. Centre-ville, Montréal, Québec, Canada H3C 3J7c Research Center, Hôpital du Sacré-Coeur de Montréal, 5400, boul. Gouin ouest, Montréal, Québec, Canada H4J 1C5d Department of Pharmacy, Hôpital du Sacré-Coeur de Montréal, 5400, boul. Gouin ouest, Montréal, Québec, Canada H4J 1C5e Division of Cardiology, Hôpital du Sacré-Coeur de Montréal, 5400, boul. Gouin ouest, Montréal, Québec, Canada H4J 1C5f CRCHUM, Centre hospitalier universitaire de Montréal, Hôtel-Dieu - Pavillon de recherche, Pavillon Masson, 3850 rue St-Urbain, Montréal, Québec, Canada H2W 1T7 |
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Abstract: | IntroductionIntersubject variability in platelet response to aspirin could be related to genetic factors that regulate platelet enzymes or receptors. This study evaluates the impact of the selected polymorphisms in the COX-1 gene, the CYP5A1 gene, the P2RY1 receptor gene, and the GPIIbIIIa receptor gene on platelet response to aspirin and risk of suffering from major adverse cardiovascular and cerebrovascular events (MACCE).Materials and methods192 Caucasian patients with stable coronary artery disease treated with daily aspirin were recruited and followed for 3 years. Platelet aggregation was measured by light transmission aggregometry with arachidonic acid (1.6 mM) and adenosine diphosphate (5, 10 or 20 μM) used as agonists. Genotyping was performed by standard PCR methods.ResultsArachidonic acid-induced platelet aggregation was unaffected by the COX-1 22C/T and by the PlA1/A2 polymorphisms. However, carriers of the 1622 G/G genotype of the P2RY1 gene had significantly higher levels of arachidonic acid-induced platelet aggregation compared with non-carriers (AA 2.0%, AG 2.0% vs. GG 9.0%, p = 0.047). Carrying the 1622 G/G genotype increased the risk of inadequate platelet response to aspirin, defined as arachidonic acid-induced aggregation ≥ 20%, by a factor of 8.5 (1.4 - 53.3, p = 0.022) and the risk of 3-year MACCE by a factor of 7 (1.4 - 34.7, p = 0.017).ConclusionThe 1622A/G mutation of the P2RY1 gene could contribute to inadequate platelet response to aspirin and is associated with an increased risk of suffering from MACCE. |
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Keywords: | AA arachidonic acid ADP adenosine diphosphate CAD coronary artery disease COX cyclooxygenase GP glycoprotein LTA light transmission aggregometry MACCE major adverse cardiovascular and cerebrovascular events PPP platelet-poor plasma PRP platelet-rich plasma Tx thromboxane |
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