篇名 | Glycosaminoglycan/Chitosan Hydrogel for Matrix-associated Autologous Chondrocyte Implantation: An in vitro Study |
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卷期 | 34:3 |
作者 | Fan, Fang-yu 、 Chiu, Chien-chang 、 Tseng, Ching-li 、 Lee, Hsuan-shu 、 Pan, Yung-ning 、 Yang, Kai-chiang |
頁次 | 211-217 |
關鍵字 | Autologous chondrocyte implantation 、 Chondrocyte 、 Glycosaminoglycan 、 Chitosan hydrogel 、 EI 、 SCI |
出刊日期 | 201406 |
DOI | 10.5405/jmbe.1516 |
Matrix-associated autologous chondrocyte implantation (MACI) is an effective treatment for full-thickness cartilage and osteochondral lesions with encouraging outcomes. However, problems include abnormal growth of chondrocytes during cultivation, cell dedifferentiation, and abnormally regenerated cartilage. A matrix that provides a physicochemical and biological microenvironment for restoring hypertrophic chondrocytes would be beneficial for MACI. Accordingly, this study evaluates the feasibility of using an injectable glycosaminoglycan (GAG)/chitosan hydrogel for MACI. Chitosan gel was prepared and GAGs (hyaluronan and chondroitin-6-sulfate) were added to fabricate a GAG/chitosan matrix. Porcine chondrocytes were isolated from articular cartilage and encapsulated within the GAG/chitosan matrix. Cell viability, material-mediated cytotoxicity, cellular proliferation, collagen production, GAG content, and mRNA gene expression patterns of the chondrocytes were evaluated. The cell viability and material- mediated cytotoxicity assay results show that the GAG/chitosan hydrogel has good biocompatibility. Chondrocytes cultured within the matrix had a slower proliferation but higher GAG production compared to those obtained for a monolayer culture. Real-time polymerase chain reaction results show that the mRNA expression of type II collagen was up-regulated but types I and X collagens were down-regulated. This study demonstrates that incorporating GAGs into a chitosan matrix maintains the normal phenotype of chondrocytes, making the GAG/chitosan matrix a candidate for MACI.