Research Article

Injectable Hydrogel Combined with Nucleus Pulposus-Derived Mesenchymal Stem Cells for the Treatment of Degenerative Intervertebral Disc in Rats

Figure 3

The proper concentration of hydrogel and microstructure of the hydrogel. (a) The proliferation of NPMSC cultured in different concentrations of hydrogels. (b) The cytotoxicity of different concentrations of hydrogel for NPMSC. (c) SEM image of the 1 : 2 / hydrogel surface. (d) Cross sections of 1 : 2 / hydrogel. Data represent ; the error bars represent the standard deviation of measurements for 6 separate samples (); compared with control group; compared with 1 : 2 / group. White scale , blue scale .