Tracheoplasty with cartilage-engineered esophagus environments

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Surgical Innovation

Background:

• Airway reconstruction presents significant challenges.
• Developing functional cartilage grafts is crucial for restoring airway integrity.
• Esophageal tissue offers a potential site for cartilage engineering.

Purpose of the Study:

• To assess the feasibility of engineering cartilage on and outside the esophagus.
• To evaluate tracheoplasty using esophagus-engineered cartilage in a rabbit model.
• To explore composite scaffolds for enhanced cartilage fabrication.

Main Methods:

• Chondrocytes isolated from auricular cartilage were used for tissue engineering.
• Injectable and preformed scaffolds were compared for esophageal cartilage formation.
• Composite scaffolds (gelatin sponge, β-TCP, Vicryl mesh, b-FGF) were implanted on the outer esophagus.

Main Results:

• A composite scaffold in a gelatin sponge demonstrated optimal cartilage engineering on the esophagus exterior.
• Engineered cartilage outside the esophagus successfully maintained airway structure for one month.
• Tracheal epithelial regeneration was observed within the engineered cartilage lumen.

Conclusions:

• Cartilage engineered externally to the esophagus is a viable strategy for airway reconstruction.
• This approach holds potential for tracheoplasty and repairing tracheal defects.