Fig. 4

Cytotoxicity was measured using an MTT assay. a, b MCF7 cells and HEK293 cells were treated with different concentrations of recombinant LukS-PV protein for 24 h (a) and 48 h (b). c, d MCF7 cells and HEK293 cells were treated with different concentrations of chemically synthesized Ag NPs for 24 h (c) and 48 h (d). e, f MCF7 cells and HEK293 cells were treated with different concentrations of AgNPs + LukS-PV for 24 h (e) and 48 h (f). *p < 0.05; **p < 0.01; ***p < 0.001 versus HEK293