Inhibition of RAD51 by siRNA and Resveratrol Sensitizes Cancer Stem Cells Derived from HeLa Cell Cultures to Apoptosis

Figure 2

Spheres of HeLa cells repair DNA damage caused by VP16 more rapidly and efficiently than MonoLayer cells. (a) Representative fluorescence microscopy images of comet assays showing DNA damage caused by VP16 after 29 hours recovery. Short comet tail length, or its absence, indicates cells without damage; 40x objective. (b) Comet tail lengths in HeLa ML and SP within the first three hours of recovery.

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