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Updated: Sep 3, 2025

Microfluidic Bioprinting for Engineering Vascularized Tissues and Organoids
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Engineering a Hierarchical Biphasic Gel for Subcutaneous Vascularization.

Daqian Gao1, Alexander U Ernst1, Xi Wang1

  • 1Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, 14853, USA.

Advanced Healthcare Materials
|July 27, 2022
PubMed
Summary

Researchers developed a novel biphasic gel scaffold that significantly enhances vascularization for implanted grafts. This new material promotes blood vessel growth, crucial for tissue engineering and regenerative medicine applications.

Keywords:
aerogelsangiogenesishierarchical structureshydrogelsvascularization

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Implanted cell grafts need functional vasculature for nutrient/oxygen supply and waste removal.
  • Creating tunable, vascular-promoting scaffolds without biologics is a significant challenge.

Purpose of the Study:

  • To present a novel biphasic gel scaffold for inducing vascularization.
  • To evaluate the scaffold's structural integrity, cell infiltration, and vascular ingrowth capabilities.

Main Methods:

  • Fabrication of a biphasic gel combining a porous aerogel and a degradable fibrin hydrogel.
  • 3D printing of the aerogel component into various configurations.
  • Assessment of mechanical properties (compression-resistance) and in vivo performance in mice.

Main Results:

  • The biphasic gel demonstrated high porosity (>90%) and stability with excellent compression-resistance.
  • Successful penetration of tissue cells and blood vessels into a 3mm thick gel was observed.
  • The biphasic gel doubled vascular ingrowth compared to a control scaffold after 4 weeks of subcutaneous implantation in mice.

Conclusions:

  • The developed biphasic gel is a promising scaffold for promoting vascularization in tissue engineering.
  • This design offers a non-biologic approach to creating vascular-promoting materials.
  • The study advances the development of advanced scaffolds for enhanced graft integration and function.