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Related Experiment Video

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Micropatterning and Assembly of 3D Microvessels
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Micro-engineered perfusable 3D vasculatures for cardiovascular diseases.

Nishanth Venugopal Menon1, Hui Min Tay, Soon Nan Wee

  • 1School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Block N3, Singapore 639798.

Lab on a Chip
|July 26, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel hydrogel patterning technique to create microvascular models for studying cardiovascular diseases. This method allows for precise control over vessel geometry, enabling better understanding of blood flow and cellular interactions in disease states.

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Research
  • Microfluidics

Background:

  • Microengineered vascular models are crucial for studying cardiovascular diseases.
  • Recreating pathophysiological microenvironments, including vessel geometry, is essential for understanding flow-induced endothelial dysfunction and inflammation.

Purpose of the Study:

  • To present a novel extracellular matrix (ECM) hydrogel patterning method for creating perfusable vascularized microchannels.
  • To engineer diverse vascular geometries for studying cardiovascular disease mechanisms.
  • To develop advanced organ-on-chip microsystems for real-time hemodynamic and cellular interaction studies.

Main Methods:

  • Utilized a capillary burst valve (CBV) concept for hydrogel patterning without surface modification.
  • Employed various ECM types, including collagen, matrigel, and fibrin.
  • Developed endothelialized microchannels, 3D endothelial-smooth muscle cell (EC-SMC) co-culture models, and constricted vascular microchannels mimicking stenosis.

Main Results:

  • Demonstrated the ability to create microchannels with different geometries using the hydrogel patterning technique.
  • Observed a significant decrease in barrier permeability in the EC-SMC co-culture model during inflammation, highlighting the role of perivascular cells.
  • Revealed distinct platelet and leukocyte adherence patterns in constricted microchannels due to altered shear stress and convective flow.

Conclusions:

  • The developed hydrogel patterning technique enables the formation of unique pathophysiological architectures in organ-on-chip systems.
  • This method facilitates the real-time study of hemodynamics and cellular interactions in cardiovascular diseases.
  • The technique is versatile and suitable for various ECM types and microchannel designs.