Figure 7.

(A) Staining for living and dead cells on magnetic nanocomposite hydrogels with different Fe₃O₄ contents after 7 days of cell culture. Cells were inoculated in samples from each group; after inoculation, all cells proliferated well. The cell proliferation of the Fe₃O₄/PVA/COLII,5:90:5 group was better than that of the other groups. (B) CCK-8 cellular proliferation results from magnetic nanocomposite hydrogels with different Fe₃O₄ contents. Cells were inoculated on each group, survived, and proliferated. On the third day after inoculation, the cell proliferation of Fe₃O₄/PVA/COLII,5:90:5 was notably better than the other tested groups. This difference was significant until the 7th day after inoculation (*P < 0.05, **P < 0.01).