Figure 3.

Concentration dependent increase in cellular quantity of phospholipid rich organelles in A549 cells after a 48-h incubation with maghemite nanoparticles. For each treatment condition, four independent biological repeats, where at least 100 cells were evaluated, were performed. Results are presented as an average evaluation score (+SD). Asterisk indicates a significant difference with respect to untreated control cells (dashed line; * equals p < 0.05; *** equals p < 0.001; one-way ANOVA, Bonferroni’s post hoc test).