Fig. 2
A Confocal images, B flow cytometry curves and C quantitative analysis of CT26 cells after 4Â h incubation with FITC-Nrf2-siRNA, IR780, TIR and TIR@FITC-Nrf2-siRNA. D Confocal images of CT26 tumor spheroids after 4 and 12Â h incubation with IR780, TIR and TIR@siRNA. E Confocal images of CT26 cells after 2 and 4Â h incubation with TIR@siRNA while the nuclei stained with DAPI and lysosome stained with lysotracker red. F The fluorescence colocalization curves of red and green fluorescence at 2Â h (upper) and 4Â h (downer). *P < 0.05 and **P < 0.01 for the comparisons between two treatment groups