[Retracted] A Novel Fluorescent Dye Invades Mitochondria to Selectively Kill Cancer Stem Cells via Increased ROS Production

Figure 2

Selective staining on cancer cells, particularly on CSCs. (a) Representative images of zebrafish blood cells and K562-KOr cancer cells stained for 15 min in 5 μM compound exposure; blue: nucleus staining by Hoechst 33342; green: KOr expressed yellow fluorescence merged with the blue nucleus; red: the compound displayed red fluorescence. (b) Integrated fluorescence intensity of the compound staining on zebrafish blood cells and K562-KOr cancer cells. (c) ALDH(−) and ALDH(+) cells of K562 cells were stained for 24 h in 1 μM compound exposure; blue: Hoechst 33342 for nucleus staining; red: the compound displayed red fluorescence. (d) Integrated fluorescence intensity of the compound staining on K562 ALDH(−) and ALDH(+) cells.

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