Figure 4.
Morphology analysis for NGF-SPIO-Au NPs treated and untreated PC-12 cells exposed with and without LEDs. (A) Percentage of differentiated neuronal phenotype cells (B) Number of neurites per cell (C) Average neurite length. Group without LED or NPs were treated as control group. *p < 0.05; **p < 0.01; ***p < 0.001, ****p < 0.0001.