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Related Experiment Video

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Microfluidic Model to Mimic Initial Event of Neovascularization
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Emulating endothelial dysfunction by implementing an early atherosclerotic microenvironment within a microfluidic

Yujin Shin1, Seongjin Lim2, Jinwon Kim3

  • 1Department of Biomedical Engineering, Hanyang University, Republic of Korea.

Lab on a Chip
|October 1, 2019
PubMed
Summary
This summary is machine-generated.

Fibronectin-coated microchannels mimic early atherosclerosis, revealing that increased stiffness and fibronectin undermine endothelial cell integrity, unlike collagen-coated models. This impacts vascular health research.

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Area of Science:

  • Biomedical Engineering
  • Vascular Biology
  • Cellular Microenvironment Studies

Background:

  • Endothelial dysfunction is crucial in vascular diseases like atherosclerosis.
  • The cellular microenvironment significantly influences endothelial cell (EC) behavior.

Purpose of the Study:

  • To replicate the pathophysiological phenotype of ECs in early atherosclerotic lesions using microchannels.
  • To investigate the impact of fibronectin (FN) and vascular stiffness on ECs.

Main Methods:

  • Utilized microchannels with fibronectin (FN)-coated hydrogels of increased stiffness.
  • Mimicked the microenvironment of early atherosclerotic lesions.
  • Compared EC behavior on FN-coated versus collagen (CL)-coated microchannels under fluid flow.

Main Results:

  • Endothelial integrity was compromised on FN-coated microchannels.
  • ECs showed random orientation, disrupted VE-cadherins, and increased permeability compared to CL-coated channels.
  • Collagen (CL) served as an atheroresistant control model.

Conclusions:

  • Increased stiffness and fibronectin in the EC microenvironment promote an atherosclerotic phenotype.
  • Fibronectin-coated substrates undermine endothelial integrity, unlike collagen.
  • Findings offer insights into atherosclerosis development and EC behavior.