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  • Title: Impact of chronic kidney disease on platelet function profiles in diabetes mellitus patients with coronary artery disease taking dual antiplatelet therapy.
    Author: Angiolillo DJ, Bernardo E, Capodanno D, Vivas D, Sabaté M, Ferreiro JL, Ueno M, Jimenez-Quevedo P, Alfonso F, Bass TA, Macaya C, Fernandez-Ortiz A.
    Journal: J Am Coll Cardiol; 2010 Mar 16; 55(11):1139-46. PubMed ID: 20223369.
    Abstract:
    OBJECTIVES: We sought to assess the impact of renal function on platelet reactivity in patients with diabetes mellitus (DM) and coronary artery disease on aspirin and clopidogrel therapy. BACKGROUND: Diabetes mellitus is a key risk factor for chronic kidney disease (CKD). In aspirin-treated DM patients the presence of moderate/severe CKD is associated with reduced clinical efficacy of adjunctive clopidogrel therapy. Whether these findings may be attributed to differences in clopidogrel-induced effects is unknown. METHODS: This was a cross-sectional observational study in which DM patients taking maintenance aspirin and clopidogrel therapy were studied. Patients were categorized into 2 groups according to the presence or absence of moderate/severe CKD. Platelet aggregation after adenosine diphosphate (ADP) and collagen stimuli were assessed with light transmittance aggregometry and defined patients with high post-treatment platelet reactivity (HPPR). Markers of platelet activation, including glycoprotein IIb/IIIa activation and P-selectin expression, were also determined using flow cytometry. RESULTS: A total of 306 DM patients were analyzed. Patients with moderate/severe CKD (n = 84) had significantly higher ADP-induced (60 +/- 13% vs. 52 +/- 15%, p = 0.001) and collagen-induced (49 +/- 20% vs. 41 +/- 20%, p = 0.004) platelet aggregation compared with those without (n = 222). After adjustment for potential confounders, patients with moderate/severe CKD were more likely to have HPPR after ADP (adjusted odds ratio: 3.8, 95% confidence interval: 1.7 to 8.5, p = 0.001) and collagen (adjusted odds ratio: 2.4; 95% confidence interval: 1.1 to 5.4; p = 0.029) stimuli. Markers of platelet activation were significantly increased in patients with HPPR. CONCLUSIONS: In DM patients with coronary artery disease taking maintenance aspirin and clopidogrel therapy, impaired renal function is associated with reduced clopidogrel-induced antiplatelet effects and a greater prevalence of HPPR.
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