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Related Experiment Video

Updated: Jun 9, 2025

Optimizing Extracellular Vesicle Delivery Using a Core-Sheath 3D-Bioprinted Scaffold for Chronic Wound Management
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Printing Cell Embedded Sacrificial Strategy for Microvasculature using Degradable DNA Biolubricant.

Jiezhong Shi1,2,3, Yifei Wan2, Haoyang Jia1

  • 1Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry Tsinghua University, Beijing, 100084, China.

Angewandte Chemie (International Ed. in English)
|October 26, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel DNA-based bioprinting method to create the smallest endothelialized microvasculature to date. This direct cell printing technique advances tissue engineering and organ repair possibilities.

Keywords:
3D printingDNA biolubricantMicrovasculatureTissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Microvasculature is crucial for cell viability in tissues and vital for tissue engineering, organ repair, and drug screening.
  • Current methods for fabricating microvasculature face challenges, limiting advancements in these fields.

Purpose of the Study:

  • To develop a novel, direct cell printing strategy for fabricating microvasculature.
  • To overcome limitations of existing microvasculature fabrication techniques.

Main Methods:

  • Developed a general PRINting Cell Embedded Sacrificial Strategy (PRINCESS) using degradable DNA biolubricant.
  • Utilized the shear-thinning and self-healing properties of DNA hydrogels for high-resolution bioprinting.
  • Achieved direct cell printing, eliminating the need for post-fabrication cell seeding.

Main Results:

  • Successfully fabricated endothelialized microvasculature with a diameter of 70 μm, surpassing the previous 100 μm limit.
  • Demonstrated the smallest endothelialized microvasculature ever bioprinted.
  • Created continuous branched vascular structures using the self-healing hydrogel properties.

Conclusions:

  • The PRINCESS strategy offers a new platform for constructing complex vascular networks, advancing thick tissue engineering.
  • This technique minimizes sacrificial biolubricant volume, enhancing practical applications in tissue engineering.
  • The high-resolution bioprinting shows potential for future applications in printing lymphatics, retinas, and neural networks.