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Related Experiment Video

Updated: Apr 13, 2026

Engineered 3D Silk-collagen-based Model of Polarized Neural Tissue
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Collagen-based brain microvasculature model in vitro using three-dimensional printed template.

Jeong Ah Kim, Hong Nam Kim1, Sun-Kyoung Im2

  • 1Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology (KIST) , Seoul, South Korea.

Biomicrofluidics
|May 7, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed a 3D in vitro brain microvasculature model using collagen and 3D printing. This system effectively mimics the blood-brain barrier, showing reduced permeability over time and responding to disruptions.

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Cell Biology

Background:

  • The blood-brain barrier (BBB) is crucial for central nervous system function.
  • Existing in vitro models often fail to replicate the complex 3D microenvironment of the brain vasculature.
  • Developing advanced models is essential for studying neurological diseases and drug delivery.

Purpose of the Study:

  • To engineer a functional 3D in vitro brain microvasculature system.
  • To characterize the barrier properties and dynamic changes of the engineered microvasculature.
  • To establish a versatile platform for BBB research and pharmaceutical applications.

Main Methods:

  • Fabrication of collagen I microchannels using microneedles and 3D printing.
  • Culture of mouse brain endothelial cells (bEnd.3) within the microchannels.
  • Assessment of transendothelial permeability using fluorescein isothiocyanate-dextran and an analytical model.

Main Results:

  • Successful reconstruction of brain microvasculature with circular cross-sections in vitro.
  • Significant decrease in transendothelial permeability over 3 weeks, indicating barrier maturation.
  • Demonstrated disruption and subsequent recovery of barrier function using hyperosmotic mannitol.

Conclusions:

  • The engineered 3D system-in-hydrogel brain microvasculature effectively mimics key aspects of the in vivo BBB.
  • This model provides a valuable tool for fundamental BBB research in physiological and pathological conditions.
  • The platform supports applications in drug discovery and development for neurological disorders.