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Heterotopic and Orthotopic Tracheal Transplantation in Mice used as Models to Study the Development of Obliterative Airway Disease
Published on: January 20, 2010
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Dual-Pedicle Tissue-Engineered Trachea Promotes Biomimetic Cartilaginous Framework, Vascularization, and Epithelial
Ziming Wang1, Yuming Wang2, Zihao Chen1,3
1Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University, School of Medicine, Shanghai, 200433, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|October 13, 2025
Summary
A novel dual-pedicle biomimetic tissue-engineered trachea (TET) graft overcomes limitations in airway reconstruction. This improved TET provides enhanced vascularization and structural support, leading to better patient outcomes in tracheal regeneration.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Surgical Innovation
Background:
- Long-segment tracheal reconstruction faces challenges with current tissue-engineered trachea (TET) grafts, including poor vascularization, weak cartilage, and epithelial issues.
- Transcriptomic analysis of conventional TETs shows high levels of hypoxia and inflammation, indicating a need for improved vascular and epithelial strategies.
Purpose of the Study:
- To develop and evaluate a dual-pedicle biomimetic TET graft designed for enhanced airway support, perfusion, and barrier function.
- To assess the efficacy of this novel TET construct in an orthotopic tracheal transplantation model in rabbits.
Main Methods:
- A dual-pedicle biomimetic TET was created using autologous rabbit auricular skin for epithelial lining and chondrocytes within decellularized Wharton's jelly hydrogels for cartilage constructs.
- Constructs were pre-vascularized in cervical muscle before assembly, integrating dual-pedicle vascular networks and improving biomechanical properties.
- Orthotopic tracheal transplantation was performed in rabbits, comparing the dual-pedicle TET with single-pedicle controls.
Main Results:
- The dual-pedicle TET demonstrated sustained tracheal patency, reduced stenosis, and improved 28-day survival rates (60% vs. 40% for controls).
- Immunofluorescence revealed decreased bacterial infiltration, apoptosis, and inflammation, alongside restored epithelial barriers and airway differentiation.
- Transcriptomic analysis confirmed the activation of regenerative pathways, including oxidative phosphorylation and tight junction formation.
Conclusions:
- The dual-pedicle biomimetic TET graft represents a promising advancement for clinical tracheal regeneration by addressing key limitations of existing approaches.
- This strategy effectively preempts pathological cascades, offering a more robust solution for complex airway reconstruction challenges.
