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On-Chip Endothelial Inflammatory Phenotyping
Published on: July 21, 2012
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Lipopolysaccharide-Induced Vascular Inflammation Model on Microfluidic Chip
Ungsig Nam1, Seunggyu Kim1, Joonha Park1
1Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141S, Korea.
Micromachines
|August 6, 2020
Summary
This study used a microfluidic device to model blood vessel inflammation caused by lipopolysaccharide (LPS). The model revealed how LPS affects endothelial cells and their interaction with immune cells, offering new insights into inflammatory responses.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Immunology
Background:
- Inflammation is a critical defense mechanism against pathogens like Gram-negative bacteria.
- Lipopolysaccharide (LPS) from bacteria triggers inflammatory responses and disease.
- Previous in vitro studies of LPS-induced inflammation primarily used 2D models.
Purpose of the Study:
- To investigate the inflammatory response of endothelial cells to LPS using a microfluidic device.
- To analyze the interaction between inflamed blood vessels and monocytic THP-1 cells in a 3D in vitro model.
- To simulate LPS diffusion and its effects on engineered blood vessels.
Main Methods:
- Utilized a microfluidic device to create an in vitro model of blood vessels.
- Simulated LPS diffusion through collagen gel using COMSOL.
- Assessed inflammatory markers (ICAM-1, VE-cadherin) and THP-1 cell adhesion, migration, and invasion.
Main Results:
- LPS treatment led to increased Intercellular Adhesion Molecule 1 (ICAM-1) and decreased VE-cadherin expression in blood vessels.
- THP-1 cell adhesion and trans-endothelial migration numbers were unchanged.
- THP-1 cells exhibited a greater migration distance in LPS-treated conditions.
Conclusions:
- The microfluidic device successfully recapitulated blood vessel inflammatory responses to LPS.
- The study elucidated the interaction dynamics between inflamed blood vessels and THP-1 cells under LPS influence.
- This 3D model provides a more accurate platform for studying vascular inflammation and cell interactions.
