title: Novel chitosan/collagen scaffold containing transforming growth factor-beta1 DNA for periodontal tissue engineering.
abstract: The current rapid progression in tissue engineering and local gene delivery system has enhanced our applications to periodontal tissue engineering. In this study, porous chitosan/collagen scaffolds were prepared through a freeze-drying process, and loaded with plasmid and adenoviral vector encoding human transforming growth factor-beta1 (TGF-beta1). These scaffolds were evaluated in vitro by analysis of microscopic structure, porosity, and cytocompatibility. Human periodontal ligament cells (HPLCs) were seeded in this scaffold, and gene transfection could be traced by green fluorescent protein (GFP). The expression of type I and type III collagen was detected with RT-PCR, and then these scaffolds were implanted subcutaneously into athymic mice. Results indicated that the pore diameter of the gene-combined scaffolds was lower than that of pure chitosan/collagen scaffold. The scaffold containing Ad-TGF-beta1 exhibited the highest proliferation rate, and the expression of type I and type III collagen up-regulated in Ad-TGF-beta1 scaffold. After implanted in vivo, EGFP-transfected HPLCs not only proliferated but also recruited surrounding tissue to grow in the scaffold. This study demonstrated the potential of chitosan/collagen scaffold combined Ad-TGF-beta1 as a good substrate candidate in periodontal tissue engineering.
authors.affiliation: Key Laboratory for Oral Biomedical Engineering Ministry of Education, School of Stomatology, Wuhan University, Wuhan 430079, PR China.
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiangrong
authors.initials: X
authors.lastname: Cheng
authors.forename: Jiawei
authors.initials: J
authors.lastname: Wang
authors.forename: Yining
authors.initials: Y
authors.lastname: Wang
authors.forename: Bin
authors.initials: B
authors.lastname: Shi
authors.forename: Cui
authors.initials: C
authors.lastname: Huang
authors.forename: Xuechao
authors.initials: X
authors.lastname: Yang
authors.forename: Tongjun
authors.initials: T
authors.lastname: Liu
mesh_terms: D000256:Adenoviridae / Q000235:genetics; D049109:Cell Proliferation; D048271:Chitosan / Q000737:chemistry / Q000494:pharmacology*; D003094:Collagen / Q000737:chemistry / Q000494:pharmacology* / Q000648:ultrastructure; D004247:DNA / Q000235:genetics; D018014:Gene Transfer Techniques; D049452:Green Fluorescent Proteins / Q000032:analysis / Q000235:genetics; D006801:Humans; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D010513:Periodontal Ligament / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D016062:Porosity; D012333:RNA, Messenger / Q000032:analysis / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D023822:Tissue Engineering / Q000379:methods*; D016212:Transforming Growth Factor beta / Q000235:genetics*; D053773:Transforming Growth Factor beta1
chemical_list: D012333:RNA, Messenger; C508960:TGFB1 protein, human; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; D049452:Green Fluorescent Proteins; D003094:Collagen; D004247:DNA; D048271:Chitosan