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Investigating the interplay between VWF, platelets, and neutrophil extracellular traps in pathologies involving thrombosis of the microvasculature

Objective

Thrombosis is a complex process involving activation of endothelial cells, and their release of Weibel-Palade body contents such as von Willebrand factor (VWF) and P-selectin. This in turn recruits platelets which form aggregates, and leukocytes such as neutrophils. The recent discovery of neutrophil extracellular traps (NETs) described a novel antimicrobial function of neutrophils. NETs are extracellular chromatin strands containing microbicidal proteins. The release of histones, serine proteases, and myeloperoxidase concentrated on DNA fibers into the extracellular space can contribute to many pathologies. NETs can bind platelets and red blood cells and therefore also contribute to thrombosis. Activated platelets can in turn stimulate neutrophils to make NETs, creating a vicious thrombo-inflammatory cycle.

Our first objective is to study VWF involvement in the induction of NETosis. We will elucidate the role of VWF as an important mediator of NET formation using VWF mutants. Innovative live-cell imaging and flow cytometry will be used to unravel the kinetics of VWF/platelet-mediated NET formation. Our second objective is to assess the physiological relevance of (inhibiting) platelet/VWF involvement in NETs-related pathology. We will investigate the role of VWF/NET interactions in three critical clinical settings where microvascular thrombosis contributes to multiorgan failure and/or mortality: sudden inflammatory response syndrome (SIRS), thrombotic thrombocytopenic purpura (TTP), and severe malaria. Mouse models of disease will be used and combined with several strategies for inhibition of VWF/platelet/NETs interactions to assess their effect on disease progression.

In summary, with this research project we aim to better understand how platelets and VWF can drive NET formation in thrombo-inflammation, as this may also lead to more targeted therapeutic approaches in diseases which currently have limited treatment options.

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Programme(s)

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Topic(s)

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MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

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Call for proposal

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(opens in new window) H2020-MSCA-IF-2016

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Coordinator

KATHOLIEKE UNIVERSITEIT LEUVEN
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 160 800,00
Address
OUDE MARKT 13
3000 LEUVEN
Belgium

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Region
Vlaams Gewest Prov. Vlaams-Brabant Arr. Leuven
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 160 800,00
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