Yoo Seob Shin1, Bum Hee Lee1, Jae Won Choi2, Byoung-Hyun Min3, Jae Won Chang1, Soon Sim Yang4, Chul-Ho Kim5. 1. Department of Otolaryngology, School of Medicine, Ajou University, Republic of Korea. 2. Department of Molecular Science and Technology, School of Medicine, Ajou University, Republic of Korea. 3. Department of Molecular Science and Technology, School of Medicine, Ajou University, Republic of Korea; Department of Orthopedic Surgery, School of Medicine, Ajou University, Republic of Korea; Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea. 4. Department of Molecular Science and Technology, School of Medicine, Ajou University, Republic of Korea; Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea. 5. Department of Otolaryngology, School of Medicine, Ajou University, Republic of Korea; Department of Molecular Science and Technology, School of Medicine, Ajou University, Republic of Korea. Electronic address: ostium@ajou.ac.kr.
Abstract
OBJECTIVES: Tracheal reconstruction with tissue-engineering technique has come into the limelight in the realm of head and neck surgery. We intended to evaluate the plausibility of allogenic chondrocytes cultured with porcine cartilage-derived substance (PCS) scaffold for partial tracheal defect reconstruction. METHODS: Powder made from crushed and decellularized porcine articular cartilage was formed as 5 mm × 12 mm (height × diameter) scaffold. Chondrocytes from rabbit articular cartilage were expanded and cultured with PCS scaffold. After 7 weeks culture, the scaffolds were implanted on a 5 mm × 10 mm artificial tracheal defect in six rabbits. Two, four and eight weeks postoperatively, the sites were evaluated endoscopically, radiologically, histologically and functionally. RESULTS: None of the six rabbits showed any sign of respiratory distress. Endoscopic examination did not show any collapse or blockage of the reconstructed trachea and the defects were completely covered with regenerated respiratory epithelium. Computed tomography showed good luminal contour of trachea. Postoperative histologic data showed that the implanted chondrocyte successfully formed neo-cartilage with minimal inflammatory response and granulation tissue. Ciliary beat frequency of regenerated epithelium was similar to those of normal adjacent mucosa. CONCLUSIONS: The shape and function of reconstructed trachea using allogenic chondrocytes cultured with PCS scaffold was restored successfully without any graft rejection.
OBJECTIVES: Tracheal reconstruction with tissue-engineering technique has come into the limelight in the realm of head and neck surgery. We intended to evaluate the plausibility of allogenic chondrocytes cultured with porcine cartilage-derived substance (PCS) scaffold for partial tracheal defect reconstruction. METHODS: Powder made from crushed and decellularized porcine articular cartilage was formed as 5 mm × 12 mm (height × diameter) scaffold. Chondrocytes from rabbit articular cartilage were expanded and cultured with PCS scaffold. After 7 weeks culture, the scaffolds were implanted on a 5 mm × 10 mm artificial tracheal defect in six rabbits. Two, four and eight weeks postoperatively, the sites were evaluated endoscopically, radiologically, histologically and functionally. RESULTS: None of the six rabbits showed any sign of respiratory distress. Endoscopic examination did not show any collapse or blockage of the reconstructed trachea and the defects were completely covered with regenerated respiratory epithelium. Computed tomography showed good luminal contour of trachea. Postoperative histologic data showed that the implanted chondrocyte successfully formed neo-cartilage with minimal inflammatory response and granulation tissue. Ciliary beat frequency of regenerated epithelium was similar to those of normal adjacent mucosa. CONCLUSIONS: The shape and function of reconstructed trachea using allogenic chondrocytes cultured with PCS scaffold was restored successfully without any graft rejection.
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