Fig. 3: The relationship of EGFR expression and the sensitivity of BC cells to proguanil.

A–C The inhibitory effects of proguanil on proliferation and migration of T24 and J82 cell lines were compared by MTT, colony formation and transwell assay. D–F The inhibitory effects of proguanil on proliferation and migration of shCtrl, shEGFR-1 and shEGFR-2 cell lines were compared by MTT, colony formation and transwell assay. G–I The inhibitory effects of proguanil on proliferation and migration of OC-J82 and OE-J82 were compared by MTT, colony formation and transwell assay. See “Materials and methods” for more experimental details. Data are representative of three independent experiments. Error bars represent means ± SD from triplicate experiments. Vehicle control means the concentration of DMSO lower than 0.3% (*P < 0.05, **P < 0.01, ***P < 0.001).