title: Type II collagen-chondroitin sulfate-hyaluronan scaffold cross-linked by genipin for cartilage tissue engineering.
abstract: Owing to of the limited repair capacity of articular cartilage, it is essential to develop tissue-engineered cartilage for patients suffering from joint disease. Chondroitin sulfate (CS) and hyaluronan (HA) are the components of the cartilage extracellular matrix (ECM) and are known to influence the proliferation and differentiation of chondrocytes. Scaffolds composed of type-II collagen, CS, and HA may create an environment that can preserve the normal phenotype of cells to promote regeneration of cartilage-like constructs. In this investigation, we prepared and characterized 3-dimensional type-II collagen scaffolds both with and without HA and CS. Porous composite scaffolds fabricated by freeze-drying showed interconnected pores with mean diameters of 140+/-30 microm and porosities of 92-95% after cross-linking with genipin. After a 14-day in vitro culture, morphologically round chondrocytes were found to be uniformly distributed throughout the sponges. Expression of genes of aggrecan, type-II collagen and cartilage oligomeric matrix protein (COMP) was statistically and significantly increased on scaffolds with CS and HA than those without CS and HA. Furthermore, there was a markedly greater accumulation of proteoglycans (PGs) on the scaffolds with CS and HA.
authors.affiliation: Department of Chemical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan, 30013, ROC.
authors.forename: Chih-Sheng
authors.initials: CS
authors.lastname: Ko
authors.forename: Jui-Pin
authors.initials: JP
authors.lastname: Huang
authors.forename: Chia-Wen
authors.initials: CW
authors.lastname: Huang
authors.forename: I-Ming
authors.initials: IM
authors.lastname: Chu
mesh_terms: D002358:Cartilage, Articular / Q000166:cytology*; D024043:Collagen Type II / Q000737:chemistry*; D006801:Humans; D006820:Hyaluronic Acid / Q000737:chemistry*; D057889:Iridoid Glycosides; D039823:Iridoids / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D023822:Tissue Engineering
chemical_list: D024043:Collagen Type II; D057889:Iridoid Glycosides; D039823:Iridoids; D006820:Hyaluronic Acid; C007834:genipin