title: Effect of recombinant galectin-1 on the growth of immortal rat chondrocyte on chitosan-coated PLGA scaffold.
abstract: The effect of galectin-1 (GAL1) on the growth of immortal rat chondrocyte (IRC) on chitosan-modified PLGA scaffold is investigated. The experimental results showed that water absorption ratio of chitosan-modified PLGA scaffold was 70% higher than that of PLGA alone after immersion in ddH(2)O for 2 weeks, indicating that chitosan-modification significantly enhances the hydrophilicity of PLGA. The experimental results also showed that GALl efficiently and spontaneously coats the chitosan-PLGA scaffold surface to promote adhesion and growth of immortal rat chondrocyte (IRC). To investigate the effect of endogenous GAL1, the full-length GAL1 cDNAs were cloned and constructed into pcDNA3.1 vectors to generate a plasmid expressed in IRC (IRC-GAL1). The results showed that IRC-GAL1 growth was significantly higher than that of IRC on chitosan-PLGA scaffold. The GAL1-potentiated IRC growth on chitosan-PLGA scaffold was dose-dependently inhibited by TDG (specific inhibitor of GAL1 binding). These results strongly suggest that GAL1 is critical for enhancing IRC cell adhesion and growth on chitosan-PLGA scaffold. Moreover, GAL1-coating or expression tends to promote IRC cell-cell aggregation on chitosan-PLGA scaffold and significantly enhances IRC migration. These results suggest that GAL1 probably could induce tissue differentiation and facilitates cartilage reconstruction. In conclusion, the experimental results suggest that both GAL1 and chitosan are important for enhancing IRC cell adhesion and growth on PLGA scaffold, and GAL1 is a potential biomaterial for tissue engineering.
authors.affiliation: Department of Life Science, Institute of Ecology and Evolutionary Biology and TechComm-5, College of Life Science, National Taiwan University, Taipei 106, Taiwan, Republic of China.
authors.forename: Shiang-Jiuun
authors.initials: SJ
authors.lastname: Chen
authors.forename: Chien-Chung
authors.initials: CC
authors.lastname: Lin
authors.forename: Wei-Cheh
authors.initials: WC
authors.lastname: Tuan
authors.forename: Ching-Shiow
authors.initials: CS
authors.lastname: Tseng
authors.forename: Rong-Nan
authors.initials: RN
authors.lastname: Huang
mesh_terms: D000818:Animals; D002356:Cartilage / Q000473:pathology; D002448:Cell Adhesion; D002449:Cell Aggregation; D002465:Cell Movement; D048271:Chitosan / Q000737:chemistry*; D019902:Chondrocytes / Q000166:cytology*; D037483:Galectin 1 / Q000737:chemistry*; D019344:Lactic Acid / Q000737:chemistry*; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D051381:Rats; D011994:Recombinant Proteins / Q000737:chemistry; D013862:Thiogalactosides / Q000737:chemistry; D023822:Tissue Engineering / Q000295:instrumentation* / Q000379:methods; D054457:Tissue Scaffolds / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D037483:Galectin 1; D011994:Recombinant Proteins; D013862:Thiogalactosides; D014867:Water; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; C031803:thiodigalactoside; D048271:Chitosan