Upregulation of CD40 ligand and enhanced monocyte-platelet aggregate formation are associated with worse clinical outcome after ischaemic stroke

Maria Lukasik; Grzegorz Dworacki; Joanna Kufel-Grabowska; Cezary Watala; Wojciech Kozubski

doi:10.1160/TH11-05-0345

Thrombosis and Haemostasis, Table of Contents

Thromb Haemost 2012; 107(02): 346-355
DOI: 10.1160/TH11-05-0345

Cardiovascular Biology and Cell Signalling

Schattauer GmbH

Upregulation of CD40 ligand and enhanced monocyte-platelet aggregate formation are associated with worse clinical outcome after ischaemic stroke

Authors

Maria Lukasik

¹Department of Neurology, Poznan University of Medical Sciences, Poznan, Poland
Grzegorz Dworacki

²Department of Clinical Immunology, Poznan University of Medical Sciences, Poznan, Poland
Joanna Kufel-Grabowska

¹Department of Neurology, Poznan University of Medical Sciences, Poznan, Poland
Cezary Watala

³Department of Haemostatic Disorders, Medical University of Lodz, Lodz, Poland
Wojciech Kozubski

¹Department of Neurology, Poznan University of Medical Sciences, Poznan, Poland

Abstract

Summary

The white blood cell count and mean platelet volume determined shortly after the symptom onset are known as independent predictors for clinical outcome after stroke. In the present study we sought to evaluate the prognostic value of platelet-derived inflammatory biomarkers measured prospectively after an ischaemic event. Using five-colour flow cytometry, the platelet surface expression of CD40L, CD62P and subpopulations of leukocyte-platelet aggregates were assessed in 93 stroke patients on the first (V₀), 10^th (V₁) and 90^th (V₂) day after stroke, and once in 65 disease controls. The clinical outcome was evaluated using the Scandinavian Stroke Scale (SSS) and modified Rankin Scale (mRS) at the same time points as blood sampling and 24 months after the event. Patients with either CD40L surface expression or the percentage of monocyte-platelet aggregates (M-plt) in the third tertile (T3) at V₀ had a significantly lower score on the SSS at V₁. Patients with the percentage M-plt at V₀ higher than the median value of M-plt in controls were at increased risk of SSS < 40 at V₁ (odds ratio: 2.6; 95% confidence interval [CI]: 1.4 – 8.7; p=0.006). Patients with the percentage of M-plt in T3 at V₀ showed progressive decline in survival (hazard ratio [HR]: 1.6; 95% CI: 1.1–1.9; p=0.02) and a significantly higher number of recurrent vascular events (HR: 2.64; 95% CI: 1.3–3.2; p=0.02) when compared to the first tertile. In conclusion, increased levels of M-plt could be a predictive marker for both early outcome and long-term prognosis while increased CD40L was correlated with worse clinical outcome.

The preliminary results of this study were presented in part during a poster session at the 62^nd Annual Meeting of the American Academy of Neurology in Toronto, 7–17 April 2010.

Keywords

Leukocyte-platelet aggregates - CD40L - stroke - prognostic factors

Full Text

References

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