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. 2018 Apr 23;9(5):470. doi: 10.1038/s41419-018-0502-4

Fig. 1. Apoptosis induced by growth factor withdrawal requires GSK-3-dependent PUMA induction.

Fig. 1

a Ba/F3 cells were deprived of IL-3 in the presence or absence of CT98014 (0.75 µM) and analyzed for apoptosis by Annexin V staining and flow cytometry analysis. Error bars represent SD from technical replicates. b Ba/F3 cells expressing CRISPR/Cas9 targeting Luciferase (crLUC), Puma (crPuma), or Bim (crBim) were deprived of IL-3 in presence or absence of CT98014 (0.75 µM) and analyzed for apoptosis by Annexin V staining after 18 h. Error bars represent SD from technical replicates. c Ba/F3 Puma−/− single-cell clones and Ba/F3 expressing CRISPR/Cas9 constructs targeting Luciferase were deprived of IL-3 for 18 h and analyzed for apoptosis by Annexin V staining. Each dot represents the mean of two independent experiments analyzing an individual single-cell clone. Error bars represent 95% confidence interval from two independent experiments (n = 2). Significance was tested by one-way ANOVA with post hoc Tukey’s multiple comparison test. d Ba/F3 Bim−/− single-cell clones and Ba/F3 expressing CRISPR/Cas9 constructs targeting Luciferase were deprived of IL-3 for 18 h and analyzed for apoptosis by Annexin V staining. Each dot represents the mean of two independent experiments analyzing an individual single-cell clone. Error bars represent the 95% confidence interval from two independent experiments (n = 2). Significance was tested by one-way ANOVA with post hoc Tukey’s multiple comparison test. ns = not significant. e Ba/F3 cells were deprived of IL-3 in presence or absence of CT98014 (0.75 µM) and harvested after the indicated time. The 0 h condition represents cells kept in medium with IL-3. RNA levels were analyzed by qRT-PCR with primers for Puma and L32 as internal reference. Data points show relative (mRNA) Puma induction compared to cells kept in medium with IL-3. Error bars represent SD from technical replicates. f Cells from a were subjected to western blotting and analyzed with the antibodies indicated.