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Figure 2. Effects of different treatments on cell viability. A) Effect of copper on cell viability in neo, APP, and APPsw cells. B) Nicotine treatment restores APPsw cell viability reduced by copper. In A, *P < 0.05; $P < 0.05; #P < 0.05 compared with copper (0) treatment in neo, APP, and APPsw cells. In B, *P < 0.05 compared with (copper 0; nicotine 0); #P < 0.05 compared with (copper 10; nicotine 0); ##P < 0.05 compared with (copper100; nicotine 0). Results are mean ± SE; n = 4. Statistical analysis was done by ANOVA.
