Topotecan treatment triggers autophagy in colon cancer cells.
A. HCT116, LS-174T and HT29 cells were transfected for 24 h with an expression construct encoding LC3 fused to the yellow fluorescent protein (YFP-LC3). Thereafter, the cells were treated with or without 1 µg/mL topotecan (TPT) for 24 h and visualised under a confocal microscope. B. The indicated cells were treated with the indicated concentrations of topotecan for 24 h. The lysates were analysed by immunoblotting with The LC3 and P62 antibodies.