NA does not prevent Aβ-induced neuronal plasma membrane depolarization. A) Bar graph shows that 10 μM NA pre-treatment failed to prevent hNT plasma membrane depolarization induced after 1 hour of 10 μM Aβ25–35 exposure, as assayed using MTT. Glutamate (Glu) was used as a positive control. *, p < 0.001 vs. CTL; #, p < 0.01 vs. Glu. B) Bar graph shows that NA did not prevent Aβ-induced depolarization as measured by DiBAC2 after 5 minutes of Aβ treatment. No effect was observed with reverse Aβ35–25 peptide.*, p < 0.001 vs. CTL; #, p < 0.01 vs. Glu. Values in the Y-axis are arbitrary spectrophotometric units.