f GADD45 is upregulated by CHIR in d4TCF cell; this positive transcriptional regulation is blocked by FOXO4-specific siRNA but not control scrambled siRNA. All experiments were done at least three times (N=3). Samples were compared using Student"s t-test. Asterisks (**) indicate a p-value<0.02; ns, non-statistically significant change was obs 