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. 2012 Jan 19;8(1):e1002316. doi: 10.1371/journal.pcbi.1002316

Figure 8. Effect of survivin on senescence.

Figure 8

IGR37 ABCG2− cells were grown until the peak of Inline graphic (98 days see Table S1) and then transfected with a plasmid containing cytoplasmic-survivin-GFP or GFP alone. The next day the cells were plated for Inline graphic activity (Inline graphic well) and crystal violet (200 cells per well) assays. In panel A, we show the percentage of Inline graphic positive cells for untransfected, GFP and GFP-survivin cells. The histogram shows the mean of five independent determination Inline graphic S.E. Represenative images of Inline graphic staining (shown in green) are reported for GFP and GFP-survivin cells. In panel B, we show the distribution of colony sizes from crystal violet assay for GFP and GFP-survivin cells, showing a marked increase in proliferation. Such an increase is not detected for unsorted IGR37 cells, transfected at the beginning of the experiment, for which the percentage of Inline graphic positive cells is already low.