Figure 1.
SIRT6 overexpression is selectively cytotoxic to multiple cancer cell lines. (A) The indicated non-cancerous and cancer cell lines were transfected with a SIRT6-expressing vector or a control plamsid. Representative immunoblot of SIRT6 levels 24 h after transfection. SIRT6 expression is similar in cancer and normal cells. (B) Represenative images of cells taken 72 h post-transfection. (C) Quantification of SIRT6 toxicity. Cell survival 72 h post-transfection, measured as the number of adherent cells transfected with SIRT6 expressing vector compared to the number of adherent cells transfected with a control plasmid. (D) Quantification of SIRT6-induced apoptosis. Relative levels of apoptosis 72 h post-transfection, determined by Annexin V staining. Experiments were repeated three times and error bars show SD.