Figure 4:Cell cytotoxicity of PDT mediated by Lipo-AlClPc. Section A represents 4T1 cell viability evaluated by MTT assay submitted to different treatments after 6 and 24 hours. Section B represents Double staining (Anexin V/Propidium Iodine) of 4T1 cells after different treatment after 6 and 24 hours. Letter bindicates significant differences (p<0.05) compared to control. Section C and D represents, respectively, control and PDT-treated 4T1 cell morphology observed in inverted light microscopy.