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Archives of cardiovascular diseases
Volume 102, n° S1
page 20 (mars 2009)
Doi : 10.1016/S1875-2136(09)72171-0
Themes et posters

A038 Clopidogrel response and diabetes mellitus: effect of diabetes type, glycemic control and fibrinogen plasma level

B. Gaborit 1, 2, C. Frere 2, T. Cuisset 2, 3, P.-E. Morange 2, A. Dutour 1, 2, M.-C. Alessi 2
1 Department of Endocrinology, Metabolic diseases, and Nutrition, CHU Nord, Marseille, France 
2 Inserm, U626, Marseille, France 
3 Department of Cardiology, CHU Timone, Marseille, France 


Diabetic patients have a higher prevalence of inadequate platelet response to Clopidogrel. However, determinants of this low response remain uncertain.

Methods and Results

We analyzed ADP-induced platelet aggregation (ADP-Ag), and Platelet Reactivity Index of Vasodilatator- Stimulated Phosphoprotein (PRI VASP) in 124 diabetic patients treated with Clopidogrel, and repeated them after glycemic optimization in 15 uncontrolled patients.

Platelet tests did not correlate with glycemic control and did not change after glycemic optimization. Type 2 diabetics had higher ADP-Ag and PRI VASP than type 1 (49±19 vs 33±19 %, p = 0.008; 62±16 vs 48±27 %, p = 0.02, respectively). On adjustment for studied variables ADP-Ag but not PRI VASP remained statistically associated with the type of diabetes (p = 0.007; p=0.11 respectively). Also fibrinogen was an independent predictor of ADP-Ag and clopidogrel non responders had elevated plasma fibrinogen, compared with responders: 8.2 ± 0.5 versus 3.8 ± 0.1g/L (p<10−4). A threshold of 3.57g/L led to a negative predictive value of 94.7 %.


Platelet response to clopidogrel, mainly ADP-Ag was not related to glycemic control but to the type of diabetes. Moreover fibrinogen strongly predicted ADP-Ag in diabetics.

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