title: Functional PLGA scaffolds for chondrogenesis of bone-marrow-derived mesenchymal stem cells.
abstract: Two chondrogenic factors, Dex and TGF-beta1, were incorporated into PLGA scaffolds and their chondrogenic potential was evaluated. The Dex-loaded PLGA scaffold was grafted with AA and heparin, the heparin-immobilized one was then reacted with TGF-beta1, yielding a PLGA/Dex-TGF (PLGA/D/T) scaffold. The scaffolds were seeded with rabbit MSCs and cultured for 4 weeks. The results show that the scaffolds including chondrogenic factors strongly upregulated the expression of cartilage-specific genes and clearly displayed type-II collagen immunofluorescence. The functionalized PLGA scaffolds could provide an appropriate niche for chondrogenic differentiation of MSC without a constant medium supply of Dex and TGF-beta1.
authors.affiliation: Biomaterials Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea.
authors.forename: Kwideok
authors.initials: K
authors.lastname: Park
authors.forename: Kyoung-Jin
authors.initials: KJ
authors.lastname: Cho
authors.forename: Jae-Jin
authors.initials: JJ
authors.lastname: Kim
authors.forename: Ik-Hwan
authors.initials: IH
authors.lastname: Kim
authors.forename: Dong Keun
authors.initials: DK
authors.lastname: Han
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells; D002356:Cartilage; D020219:Chondrogenesis; D024043:Collagen Type II; D006493:Heparin / Q000737:chemistry; D019344:Lactic Acid / Q000737:chemistry*; D059630:Mesenchymal Stem Cells / Q000166:cytology; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011817:Rabbits; D017154:Stromal Cells / Q000166:cytology*; D023822:Tissue Engineering / Q000379:methods; D054457:Tissue Scaffolds / Q000737:chemistry*; D053773:Transforming Growth Factor beta1 / Q000737:chemistry; D015854:Up-Regulation / Q000235:genetics
chemical_list: D024043:Collagen Type II; D053773:Transforming Growth Factor beta1; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D006493:Heparin