title: Osteogenic differentiation of mesenchymal stem cells in biodegradable sponges composed of gelatin and beta-tricalcium phosphate.
abstract: Biodegradable gelatin sponges incorporating various amounts of beta-tricalcium phosphate (betaTCP) (gelatin-betaTCP) were fabricated and the in vitro osteogenic differentiation of mesenchymal stem cells (MSC) isolated from the rat bone marrow in the sponges was investigated. The gelatin sponges incorporating betaTCP have an interconnected pore structure with the average size of 180-200 microm, irrespective of the betaTCP amount. The stiffness of the sponges became higher with an increase in the amount of betaTCP. When seeded into the sponges by an agitated method, MSC were homogeneously distributed throughout the sponge. The morphology of cells attached got more spreaded with the increased betaTCP amount. The rate of MSC proliferation depended on the betaTCP amount and culture method: the higher the betaTCP amount in the stirring culture, the higher the proliferation rate. The deformed extent of gelatin-betaTCP sponges was suppressed with the increased amount of betaTCP. When measured to evaluate the osteogenic differentiation of MSC, the alkaline phosphatase activity and osteocalcin content became maximum for the sponge with a betaTCP amount of 50 wt%, although both the values were significantly high in the stirring culture compared with those in the static culture. We concluded that the attachment, proliferation, and osteogenic differentiation of MSC were influenced by sponge composition of gelatin and betaTCP as the cell scaffold.
authors.affiliation: Department of Biomaterials, Field of Tissue Engineering, Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
authors.forename: Yoshitake
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Masaya
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Tabata
mesh_terms: D020341:Absorbable Implants; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D018786:Bone Substitutes / Q000737:chemistry*; D002130:Calcium Phosphates / Q000737:chemistry*; D002448:Cell Adhesion / Q000502:physiology; D002454:Cell Differentiation / Q000502:physiology; D049109:Cell Proliferation; D048429:Cell Size; D002478:Cells, Cultured; D019245:Compressive Strength; D004548:Elasticity; D005780:Gelatin / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry; D008297:Male; D008422:Materials Testing; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000502:physiology; D016348:Osseointegration / Q000502:physiology; D010006:Osteoblasts / Q000166:cytology* / Q000502:physiology; D010012:Osteogenesis / Q000502:physiology*; D051381:Rats; D011916:Rats, Inbred F344; D023822:Tissue Engineering / Q000379:methods
chemical_list: D001672:Biocompatible Materials; D018786:Bone Substitutes; D002130:Calcium Phosphates; D020100:Hydrogels; C485817:beta-tricalcium phosphate; D005780:Gelatin