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Related Experiment Video

Updated: May 21, 2025

Seeding and Implantation of a Biosynthetic Tissue-engineered Tracheal Graft in a Mouse Model
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3D-printed Engineered Trachea Functionalized by Diverse Extracellular Matrix Particles.

Weikang Lin1,2,3, Hai Tang1,2, Runfeng Cao1,2

  • 1Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, China.

Advanced Healthcare Materials
|March 17, 2025
PubMed
Summary
This summary is machine-generated.

This study engineered a functional tracheal substitute using 3D printing and decellularized extracellular matrix particles (DEPs). The innovative scaffold supports cartilage formation, vascularization, and immune response, showing promise for tracheal reconstruction.

Keywords:
cartilage regenerationextracellular matrixphoto‐crosslinking hydrogelstracheal repair

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Last Updated: May 21, 2025

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Constructing tracheal substitutes with native-like structure and physiological functions remains challenging.
  • Existing methods often lack the complexity for complete tracheal regeneration.

Purpose of the Study:

  • To fabricate an engineered trachea with a native-like structure and multiple physiological functions.
  • To evaluate the potential of decellularized extracellular matrix particles (DEPs) in guiding tissue regeneration within a 3D-printed scaffold.

Main Methods:

  • Utilized a combination of 3D printing and a modular strategy to create the engineered trachea.
  • Incorporated costal cartilage-derived DEPs in cartilage rings and lung-derived DEPs between rings.
  • Evaluated the scaffold's performance in heterotopic vascularization and long-segmental tracheal replacement in a rabbit model.

Main Results:

  • Costal cartilage DEPs promoted chondrocyte maturation and natural collagen deposition for mechanical integrity.
  • Lung-derived DEPs accelerated endothelial cell migration for vascular network formation and recruited macrophages for tissue regeneration.
  • The engineered trachea demonstrated satisfactory physiological function in a rabbit tracheal replacement model.

Conclusions:

  • DEP functionalization of 3D-printed scaffolds creates a tracheal substitute with native-like structure, mechanical support, vascularization, and favorable immune conditions.
  • This engineered trachea shows significant clinical potential for patients requiring tracheal reconstruction.