Neutrophil Fluorescence: A New Indicator of Cell Activation During Septic Shock–Induced Disseminated Intravascular Coagulation

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Stiel, Laure | Delabranche, Xavier | Galoisy, Anne-Cécile | Severac, François | Toti, Florence | Mauvieux, Laurent | Meziani, Ferhat | Boisramé-Helms, Julie

Edité par CCSD ; Lippincott, Williams & Wilkins -

International audience. Objective: To investigate the contribution of neutrophil activation as innate immune cells during septic shock–induced disseminated intravascular coagulation. Design: Prospective study. Setting: One University Hospital ICU. Participants: Hundred patients with septic shock. Thirty-five patients had disseminated intravascular coagulation according to Japanese Association for Acute Medicine 2006 score. Intervention: None. Measurements and Main Results: Neutrophil chromatin decondensation was assessed by measuring neutrophil fluorescence (NEUT-side-fluorescence light) labeled by a fluorochrome-based polymethine reagent using a routine automated flow cytometer Sysmex XN20 (Sysmex, Kobe, Japan) and neutrophil-derived CD66b microparticles by prothrombinase assay. Measurements in disseminated intravascular coagulation and no disseminated intravascular coagulation patients showed that a mean value of NEUT-side-fluorescence light above 57.3 arbitrary units had a sensitivity of 90.91% and a specificity of 80.60% for disseminated intravascular coagulation diagnosis. NEUT-side-fluorescence light was correlated to the CD66b microparticles/neutrophil count, a surrogate of neutrophil activation associated with septic shock–induced disseminated intravascular coagulation. Conclusion: NEUT-side-fluorescence light, routinely available, could prove an accurate biomarker of neutrophil activation.

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