Research Article

Lysosomal Destabilizing Drug Siramesine and the Dual Tyrosine Kinase Inhibitor Lapatinib Induce a Synergistic Ferroptosis through Reduced Heme Oxygenase-1 (HO-1) Levels

Figure 3

Ferrostatin-1 and DFO partially inhibits lapatinib and siramesine cell death. (a) A549 and U87 cells were pretreated with 10 μM Fer-1 or (b) 200 μM DFO for one hour before treatment with DMSO (D), lapatinib (L), siramesine (S), or the combination of lapatinib and siramesine (L+S) for 24 hours. Cell death was quantified by trypan blue exclusion assay using flow cytometry. Standard error represents three independent experiments (). represents statistical significance of .