Figure 5. HLEC viability assay with intervention of β-amyloid (Aβ) peptide alone. A treatment with nanomolar concentrations (0.2 nM to 10 nM) of Aβ 1–42 or Aβ 1–40 peptides alone for 24 h incubation left cell viability unimpaired. The data are the means ± standard deviation (SD). In each group, three independent tests were performed. No statistically significant differences were found comparing the Aβ treatment groups with the untreated control group, with one-way ANOVA and least significant difference (LSD) tests (p>0.05).