期刊
JOURNAL OF MATERIALS CHEMISTRY B
卷 1, 期 34, 页码 4251-4258出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tb20600a
关键词
-
资金
- National Natural Science Foundation of China [20902042, 21004080]
To develop hydrogels with high mechanical strength for cell encapsulation and three-dimensional culture is a critical challenge for cartilage tissue engineering. In this study, novel double network (DN) hydrogels were fabricated and phosphate buffer solution (PBS) was used as the solvent to facilitate cell encapsulation. The tough DN hydrogels were prepared through a two-step photopolymerization using neutral oligo(2,2-dimethyltrimethylene carbonate)-poly(ethylene glycol)-oligo(2,2-dimethyltrimethylene carbonate)diacrylate (DPD-DA) chains for the first network and methacrylated hyaluronic acid (HA-GMA) chains for the second network. The fracture stress values of the optimized and cell-laden DN hydrogels were 8.38 +/- 0.67 MPa and 6.28 +/- 1.26 MPa, respectively, which showed comparable mechanical strength with natural articular cartilage tissue. The live/dead cell viability assay of cell-laden DN hydrogels demonstrated the tough DN hydrogels have comparable cytocompatibility with PEG hydrogels. After long-term culture, cartilage-specific extra cellular matrix accumulated in these DN hydrogels. The results indicated the potential of the novel DN hydrogels as cartilage tissue engineering scaffolds.
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