The extent of P2Y12 inhibition by clopidogrel in diabetes mellitus patients with acute coronary syndrome is not related to glycaemic control: Roles of white blood cell count and body weight

Olivier Morel; Soraya El Ghannudi; Sebastien Hess; Antje Reydel; Ulun Crimizade; Laurence Jesel; Bogdan Radulescu; Marie L. Wiesel; Christian Gachet; Patrick Ohlmann

doi:10.1160/TH11-12-0876

Thrombosis and Haemostasis, Table of Contents

Thromb Haemost 2012; 108(02): 338-348
DOI: 10.1160/TH11-12-0876

Platelets and Blood Cells

Schattauer GmbH

The extent of P2Y₁₂ inhibition by clopidogrel in diabetes mellitus patients with acute coronary syndrome is not related to glycaemic control: Roles of white blood cell count and body weight

Authors

Olivier Morel

¹Pôle d'activité médico-chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, Université de Strasbourg, France

³U. 770 INSERM, Le Kremlin Bicêtre, France
Soraya El Ghannudi

¹Pôle d'activité médico-chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, Université de Strasbourg, France
Sebastien Hess

¹Pôle d'activité médico-chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, Université de Strasbourg, France
Antje Reydel

¹Pôle d'activité médico-chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, Université de Strasbourg, France
Ulun Crimizade

¹Pôle d'activité médico-chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, Université de Strasbourg, France
Laurence Jesel

¹Pôle d'activité médico-chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, Université de Strasbourg, France
Bogdan Radulescu

¹Pôle d'activité médico-chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, Université de Strasbourg, France
Marie L. Wiesel

²UMR_S 949 INSERM-Université de Strasbourg, Etablissement Français du Sang-Alsace, Strasbourg, France
Christian Gachet

²UMR_S 949 INSERM-Université de Strasbourg, Etablissement Français du Sang-Alsace, Strasbourg, France
Patrick Ohlmann

¹Pôle d'activité médico-chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, Université de Strasbourg, France

Abstract

Summary

It was the study objective to determine whether glycaemic control affects the extent of platelet inhibition by thienopyridines as assessed by vasodilator-stimulated phosphoprotein flow cytometry (VASP-FCT) in patients with diabetes mellitus (DM) undergoing percutaneous coronary intervention (PCI) during acute coronary syndrome (ACS). Although the proportion of high on-treatment residual platelet reactivity is higher in DM, the contributions of glycaemic control and other factors associated with DM, such as excess body weight and inflammation, to this impaired platelet inhibition by thienopyridines have not yet been fully characterised. In this study, the extent of P2Y₁₂ ADP receptor pathway inhibition was evaluated by the VASP-FCT. Platelet activation was expressed as the platelet reactivity index (PRI). Low response to clopidogrel (LR) was defined as a PRI of >61%. Four hundred forty-five consecutive ACS patients (DM = 160, NDM = 285) were enrolled. The proportion of LR was higher in DM patients (50 vs. 37.5%). In DM, PRI was not correlated with glycosylated haemoglobin (HbA1c) or glycaemia. In a univariate analysis, LR was associated with age, male sex, overweight, and white blood cell count (WBC). In a multivariate analysis, WBC >10,000 and body weight >80 kg were the sole independent predictors of LR to clopidogrel (hazard ratio (HR) 3.02 [1.36–6.68], p=0.006 and HR 2.47 [1.14–5.35], p = 0.021, respectively). Conversely, in non-DM patients, ST-elevation myocardial infarction was the sole independent predictor of LR. In conclusion, in ACS DM patients undergoing PCI, the extent of P2Y₁₂ inhibition by clopidogrel is not related to glycaemic control but is related to body weight and inflammatory status as assessed by the WBC.

Keywords

Thienopyridines - resistance - platelet - stent thrombosis - acute coronary syndrome - inflammation - obesity - leukocyte

Full Text

References

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