Figure 7

(a) Percentage alamar blue reduction for cells only (MDA-MB-231 cells), drug-loaded and control PLGA-PEG microspheres after 6, 24, 48, 72 and 96 h post-treatment. (b) Percentage cell growth inhibition for drug-loaded and control PLGA-PEG microspheres after 6, 24, 48, 72 and 96 h’ post-treatment [*p < 0.05 (n = 4)].