title: Modulation of in vitro attachment, proliferation and osteogenic differentiation of rat bone-marrow-derived stem cells using different molecular mass chitosans and their blends with gelatin.
abstract: We systematically investigated the behaviors of rat bone-marrow-derived stem cells (MSCs) on films prepared from high-molecular-mass chitosan (CH), low-molecular-mass chitooligosaccharide (COS) and their blends with gelatin (G) at various weight blending ratios. On the first day after seeding, the spreading areas of MSCs attached on the blended G/CH and G/COS films were larger than those attached on pure gelatin and COS films. Round-shaped MSCs on pure CH film were observed. The number of proliferated MSCs was also dominant in the case of blended films, at some certain blending ratios which correlated to suitably positive charge of the blended films obtained from zeta potential measurement. Among pure materials, attachment and proliferation of MSCs on COS film were comparable to those on gelatin film while CH film was toxic. The difference in toxicity of CH and COS was also confirmed by Annexin V-FITC/PI apoptosis test. After a 7-day culture under osteogenic induction, the blended films were also found to be more preferable materials for in vitro osteogenic differentiation of MSCs, as confirmed by alkaline phosphatase (ALP) activities, calcium contents and Von Kossa staining. It was proved from this study that attachment, proliferation and osteogenic differentiation of MSCs strongly depended on molecular mass of CHs and the ratio of their blends with gelatin.
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, PhayaThai Road, Phatumwan, Bangkok 10330, Thailand.
authors.forename: Juthamas
authors.initials: J
authors.lastname: Ratanavaraporn
authors.forename: Sorada
authors.initials: S
authors.lastname: Kanokpanont
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Tabata
authors.forename: Siriporn
authors.initials: S
authors.lastname: Damrongsakkul
mesh_terms: D000327:Adsorption; D000818:Animals; D017304:Annexin A5 / Q000737:chemistry; D001854:Bone Marrow Cells / Q000166:cytology*; D002448:Cell Adhesion / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D048271:Chitosan / Q000737:chemistry* / Q000494:pharmacology*; D005260:Female; D005353:Fibronectins / Q000737:chemistry; D005780:Gelatin / Q000737:chemistry*; D008970:Molecular Weight; D010012:Osteogenesis / Q000187:drug effects*; D016062:Porosity; D011419:Propidium / Q000737:chemistry; D051381:Rats; D017208:Rats, Wistar; D012995:Solubility; D013234:Stem Cells / Q000166:cytology* / Q000187:drug effects*; D013499:Surface Properties; D054457:Tissue Scaffolds / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D017304:Annexin A5; D005353:Fibronectins; D014867:Water; D011419:Propidium; D005780:Gelatin; D048271:Chitosan