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Quantitative and Temporal Control of Oxygen Microenvironment at the Single Islet Level
Published on: November 17, 2013
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Microfluidic platform for the reproduction of hypoxic vascular microenvironments
Naoyuki Takahashi1,2, Daisuke Yoshino3, Ryuji Sugahara1,2
1Graduate School of Biomedical Engineering, Tohoku University, 6-6-12 Aramaki-aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan.
Scientific Reports
|April 3, 2023
Summary
This study introduces a microfluidic platform to simulate hypoxic vascular environments. Endothelial cells (ECs) showed altered migration and alignment under combined hypoxic and flow conditions, revealing insights into vascular dynamics.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Physiology
Background:
- Vascular endothelial cells (ECs) maintain vascular homeostasis by responding to mechanical stimuli like blood flow.
- The cellular behavior of ECs in the low-oxygen (hypoxic) vascular microenvironment under flow is not fully understood.
Purpose of the Study:
- To develop and utilize a microfluidic platform for recreating hypoxic vascular microenvironments.
- To investigate the dynamics of ECs under simultaneous hypoxic and fluid shear stress.
Main Methods:
- A microfluidic device integrated with a flow channel was used to control oxygen concentration and apply fluid shear stress.
- Endothelial cell monolayers were cultured and exposed to simultaneous hypoxic and flow conditions.
Main Results:
- EC migration velocity initially increased, particularly against flow, then decreased under combined stress.
- ECs exhibited alignment and elongation along the flow direction after 6 hours.
- VE-cadherin expression and actin filament assembly were enhanced in ECs under these conditions.
Conclusions:
- The developed microfluidic platform effectively simulates hypoxic vascular conditions for cell culture.
- This platform is valuable for studying endothelial cell dynamics in physiologically relevant microenvironments.
