title: PLGA-PTMC-Cultured Bone Mesenchymal Stem Cell Scaffold Enhances Cartilage Regeneration in Tissue-Engineered Tracheal Transplantation.
abstract: The treatment of long-segment tracheal defect requires the transplantation of effective tracheal substitute, and the tissue-engineered trachea (TET) has been proposed as an ideal tracheal substitute. The major cause of the failure of segmental tracheal defect reconstruction by TET is airway collapse caused by the chondromalacia of TET cartilage. The key to maintain the TET structure is the regeneration of chondrocytes in cartilage, which can secrete plenty of cartilage matrices. To address the problem of the chondromalacia of TET cartilage, this study proposed an improved strategy. We designed a new cell sheet scaffold using the poly(lactic-co-glycolic acid) (PLGA) and poly(trimethylene carbonate) (PTMC) to make a porous membrane for seeding cells, and used the PLGA-PTMC cell-scaffold to pack the decellularized allogeneic trachea to construct a new type of TET. The TET was then implanted in the subcutaneous tissue for vascularization for 2 weeks. Orthotopic transplantation was then performed after implantation. The efficiency of the TET we designed was analyzed by histological examination and biomechanical analyses 4 weeks after surgery. Four weeks after surgery, both the number of chondrocytes and the amount of cartilage matrix were significantly higher than those contained in the traditional stem-cell-based TET. Besides, the coefficient of stiffness of TET was significantly larger than the traditional TET. This study provided a promising approach for the long-term functional reconstruction of long-segment tracheal defect, and the TET we designed had potential application prospects in the field of TET reconstruction.
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Bingyang
authors.initials: B
authors.lastname: Yan
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Zhipei
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Yunfeng
authors.initials: Y
authors.lastname: Ni
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Yongshi
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Liu
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Wuping
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Xing
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China.
authors.forename: Xiao-Fei
authors.initials: XF
authors.lastname: Li
mesh_terms: D000818:Animals; D002356:Cartilage / Q000166:cytology / Q000502:physiology / Q000648:ultrastructure; D002478:Cells, Cultured; D019902:Chondrocytes / Q000166:cytology; D020219:Chondrogenesis; D004146:Dioxanes / Q000737:chemistry*; D019344:Lactic Acid / Q000737:chemistry; D045164:Mesenchymal Stem Cell Transplantation / Q000379:methods; D059630:Mesenchymal Stem Cells / Q000166:cytology*; D011100:Polyglycolic Acid / Q000737:chemistry; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000737:chemistry*; D011817:Rabbits; D012038:Regeneration; D023822:Tissue Engineering / Q000379:methods*; D054457:Tissue Scaffolds / Q000737:chemistry*; D014132:Trachea / Q000293:injuries / Q000637:transplantation* / Q000648:ultrastructure
chemical_list: D004146:Dioxanes; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; C059299:polytrimethylene carbonate; D019344:Lactic Acid
keywords: -Chondrogenic differentiation; -Poly(lactic-co-glycolic acid) (PLGA); -Poly(trimethylene carbonate); -Tissue-engineered trachea; Bone mesenchymal stem cells