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Aβ-degrading activity assay in SH-SY5Y cells incubated for 24 h using qf-Aβ(1–7)C or qf-Aβ(12–16)AAC-EDANS as substrate with 0.5% DMSO (control) or in the presence of the tested compounds (5 μM). The data are the mean ± SD for three independent samples. * p < 0.05; ** p < 0.01; *** p < 0.001; ****, p < 0.0001 compared to the control by one-way ANOVA.
