title: The bone formation in vitro and mandibular defect repair using PLGA porous scaffolds.
abstract: Highly porous scaffolds of poly(lactide-co-glycolide) (PLGA) were prepared by solution-casting/salt-leaching method. The in vitro degradation behavior of PLGA scaffold was investigated by measuring the change of normalized weight, water absorption, pH, and molecular weight during degradation period. Mesenchymal stem cells (MSCs) were seeded and cultured in three-dimensional PLGA scaffolds to fabricate in vitro tissue engineering bone, which was investigated by cell morphology, cell number and deposition of mineralized matrix. The proliferation of seeded MSCs and their differentiated function were demonstrated by experimental results. To compare the reconstructive functions of different groups, mandibular defect repair of rabbit was made with PLGA/MSCs tissue engineering bone, control PLGA scaffold, and blank group without scaffold. Histopathologic methods were used to estimate the reconstructive functions. The result suggests that it is feasible to regenerate bone tissue in vitro using PLGA foams with pore size ranging from 100-250 microm as scaffolding for the transplantation of MSCs, and the PLGA/MSCs tissue engineering bone can greatly promote cell growth and have better healing functions for mandibular defect repair. The defect can be completely recuperated after 3 months with PLGA/MSCs tissue engineering bone, and the contrastive experiments show that the defects could not be repaired with blank PLGA scaffold. PLGA/MSCs tissue engineering bone has great potential as appropriate replacement for successful repair of bone defect.
authors: Institute of Nano and Bio-Polymeric Materials, School of Material Science and Engineering, Tongji University, Shanghai, 200092, PR of China.
authors: Tianbin
authors: T
authors: Ren
authors: Jie
authors: J
authors: Ren
authors: Xiaozhen
authors: X
authors: Jia
authors: Kefeng
authors: K
authors: Pan
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D048091:Guided Tissue Regeneration / Q000379:methods; D019344:Lactic Acid; D008334:Mandible / Q000502:physiology; D008338:Mandibular Injuries / Q000628:therapy*; D059630:Mesenchymal Stem Cells / Q000502:physiology*; D010012:Osteogenesis / Q000502:physiology*; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers; D016062:Porosity; D011817:Rabbits; D023822:Tissue Engineering / Q000379:methods
chemical_list: D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid