title: PHBV microspheres--PLGA matrix composite scaffold for bone tissue engineering.
abstract: Polymer scaffolds, particularly in the form of microspheres, have been employed to support cells growth and deliver drugs or growth factors in tissue engineering. In this study, we have established a scaffold by embedding poly (beta-hydroxybutyrate-co-beta-hydroxyvalerate) (PHBV) microspheres into poly (L-lactic-co-glycolic acid) (PLGA) matrix, according to their different solubility in acetone, with the aim of repairing bone defects. PLGA/PHBV scaffolds had good pore parameters, for example, the porosity of PLGA/30% PHBV scaffold can reach to 81.273 +/- 2.192%. Besides, the pore size distribution of the model was evaluated and the results revealed that the pore size mainly distributed between 50 mum and 200 mum. With increasing the amount of PHBV microspheres, the compressive strength of the PLGA/PHBV scaffold enhanced. The morphology of the hybrid scaffold was rougher than that of pure PLGA scaffold, which had no significant effect on the cell behavior. The in vitro evaluation suggested that the model is suitable as a scaffold for engineering bone tissue, and has the potential for further applications in drug delivery system.
authors.affiliation: School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Xuetao
authors.initials: X
authors.lastname: Shi
authors.forename: Li
authors.initials: L
authors.lastname: Ren
authors.forename: Chang
authors.initials: C
authors.lastname: Du
authors.forename: Yingjun
authors.initials: Y
authors.lastname: Wang
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D001842:Bone and Bones / Q000502:physiology*; D002448:Cell Adhesion / Q000502:physiology; D002470:Cell Survival; D002478:Cells, Cultured; D019245:Compressive Strength; D016503:Drug Delivery Systems; D006801:Humans; D019344:Lactic Acid / Q000737:chemistry*; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000502:physiology; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D010316:Particle Size; D011091:Polyesters / Q000737:chemistry*; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D016062:Porosity; D023822:Tissue Engineering / Q000295:instrumentation / Q000379:methods; D054457:Tissue Scaffolds / Q000737:chemistry*; D000094122:Polyhydroxybutyrates
chemical_list: D001672:Biocompatible Materials; D019344:Lactic Acid; D011091:Polyesters; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; C052620:poly(3-hydroxybutyrate)-co-(3-hydroxyvalerate); D000094122:Polyhydroxybutyrates