title: Self-assembly model, hepatocytes attachment and inflammatory response for silk fibroin/chitosan scaffolds.
abstract: Silk fibroin is an attractive natural fibrous protein for biomedical application due to its good biocompatibility and high tensile strength. Silk fibroin is apt to form a sheet-like structure during the freeze-drying process, which is not suitable for the scaffold of tissue engineering. In our former study, the adding of chitosan promoted the self-assembly of silk fibroin/chitosan (SFCS) into a three-dimensional (3D) homogeneous porous structure. In this study, a model of the self-assembly is proposed; furthermore, hepatocytes attachment and inflammatory response for the SFCS scaffold were examined. The rigid chain of chitosan may be used as a template for beta-sheet formation of silk fibroin, and this may break the sheet structure of the silk fibroin scaffold and promote the formation of a 3D porous structure of the SFCS scaffold. Compared with the polylactic glycolic acid scaffold, the SFCS scaffold further facilitates the attachment of hepatocytes. To investigate the inflammatory response, SFCS scaffolds were implanted into the greater omentum of rats. From the results of implantation, we could demonstrate in vivo that the implantation of SFCS scaffolds resulted in only slight inflammation. Keeping the good histocompatibility and combining the advantages of both fibroin and chitosan, the SFCS scaffold could be a prominent candidate for soft tissue engineering, for example, in the liver.
authors: State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China.
authors: Zhending
authors: Z
authors: She
authors: Weiqiang
authors: W
authors: Liu
authors: Qingling
authors: Q
authors: Feng
mesh_terms: D000818:Animals; D048271:Chitosan / Q000737:chemistry*; D005260:Female; D005349:Fibroins / Q000737:chemistry* / Q000378:metabolism*; D022781:Hepatocytes / Q000378:metabolism; D019344:Lactic Acid; D011091:Polyesters; D011108:Polymers; D016062:Porosity; D051381:Rats; D017207:Rats, Sprague-Dawley; D047011:Silk / Q000737:chemistry*; D013718:Tensile Strength; D023822:Tissue Engineering / Q000379:methods*
chemical_list: D011091:Polyesters; D011108:Polymers; D047011:Silk; D019344:Lactic Acid; C033616:poly(lactide); D005349:Fibroins; D048271:Chitosan