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Updated: May 21, 2025
09:19
In Vitro Microfluidic Disease Model to Study Whole Blood-Endothelial Interactions and Blood Clot Dynamics in Real-Time
Published on: May 24, 2020
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Clinically relevant clot resolution via a thromboinflammation-on-a-chip.
Yongzhi Qiu1,2,3,4,5, Jessica Lin6,7,8,9,10, Audrey Wang6,7,8,9,10
1The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology & Emory University, Atlanta, GA, USA. yongzhi.qiu@emory.edu.
Nature
|April 2, 2025
Summary
A new chip model reveals how microvascular thromboinflammation resolves, identifying neutrophil elastase as a key factor and guiding therapeutic strategies for clot resolution and disease treatment.
Area of Science:
- Biomedical Engineering
- Cardiovascular Research
- Translational Medicine
Background:
- Thromboinflammation causes microvascular occlusion and end-organ failure in various diseases.
- Understanding microvascular thromboinflammation resolution is limited by scale and duration.
- Existing models do not adequately capture the long-term dynamics of clot resolution.
Purpose of the Study:
- To develop a novel in vitro model for studying microvascular thromboinflammation resolution.
- To elucidate the temporal phases and mechanisms of clot resolution in microvascular thromboinflammation.
- To investigate therapeutic strategies for preventing thrombosis and promoting clot resolution.
Main Methods:
- Development of a hydrogel-based thromboinflammation-on-a-chip model with long-term culture capabilities.
- Utilizing multiplexed RNA fluorescence in situ hybridization to analyze cellular and molecular changes.
- Monitoring clot resolution over clinically relevant timescales (up to months).
Main Results:
- Mapped distinct temporal phases of clot resolution in microvascular thromboinflammation.
- Demonstrated that inflammation shifts the endothelium fibrinolytic balance towards thrombosis.
- Identified neutrophil elastase as a dual-acting factor promoting resolution and tissue damage.
- Early tissue plasminogen activator improves endothelial barrier function.
- Defibrotide and enoxaparin suppress thromboinflammation via endothelium-mediated pathways.
- Combined enoxaparin and crizanlizumab reduce microvascular occlusion and protect endothelium in sickle cell disease.
Conclusions:
- The developed chip model enables long-term study of microvascular thromboinflammation resolution.
- Neutrophil elastase plays a critical role in clot resolution and potential tissue damage.
- Therapeutic interventions can be evaluated for their efficacy in preventing thrombosis and promoting resolution.
- This platform facilitates drug discovery for thromboinflammatory diseases, including sickle cell disease.
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