title: Fabrication and characterization of PLLA-chitosan hybrid scaffolds with improved cell compatibility.
abstract: To combine the individual advantages of synthetic and natural polymers, poly(L-lactic acid) (PLLA)-chitosan hybrid scaffolds were fabricated. PLLA sponges were prepared by particulate-leaching, and then PLLA-chitosan hybrid scaffolds were obtained by dipping the PLLA sponges in chitosan solution and subsequently freeze-drying. Physicochemical properties of the scaffolds were characterized by scanning electron microscopy (SEM), water uptake test, and mechanical strength measurement. Moreover, cell adhesion, cell proliferation, and cell viability on the scaffolds were evaluated through osteoblast-like cell culture. The experimental results indicated that, PLLA sponges exhibited macroporous structure and the interconnected microporous structure of chitosan was formed within the macropores of PLLA sponges. The incorporation of chitosan reinforced PLLA sponges in dependence on chitosan content. The hybrid scaffolds had higher water uptake ability compared with PLLA sponges. Particularly, the hybrid scaffolds exhibited excellent cell attachment efficiency, cell proliferation, and cell viability. This study suggests that the hybrid scaffolds obtain good mechanical strength from PLLA and excellent cell compatibility from chitosan.
authors.affiliation: Department of Materials Science and Engineering, Jinan University, Guangzhou, China 510632.
authors.forename: Yanpeng
authors.initials: Y
authors.lastname: Jiao
authors.forename: Zonghua
authors.initials: Z
authors.lastname: Liu
authors.forename: Changren
authors.initials: C
authors.lastname: Zhou
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D018786:Bone Substitutes / Q000737:chemistry*; D002448:Cell Adhesion; D018929:Cell Culture Techniques; D049109:Cell Proliferation; D002478:Cells, Cultured; D048271:Chitosan / Q000737:chemistry*; D019344:Lactic Acid / Q000737:chemistry*; D008422:Materials Testing; D010006:Osteoblasts / Q000166:cytology* / Q000502:physiology; D011091:Polyesters; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D001672:Biocompatible Materials; D018786:Bone Substitutes; D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide); D048271:Chitosan