Figure 4
KLF2 and SMAD7 genes were upregulated by stimulation with SCF or NGF. A: HMC-1 (V560G c-Kit) cells were either incubated with serum (serum) or in serum free medium for 17 h, then treated without (-) or with (+) imatinib (5 μM) for 4 h prior to stimulation without (-) or with SCF (100 ng/ml) or NGF (100 ng/ml) for 30 (30) and 120 min (120). Total RNA was isolated and, after reverse transcription with Oligo dT-primers, cDNA was analyzed by semi-quantitative PCR for expression of EGR1, KLF2, SMAD7 and actin (ACTB). Water (H2O) and RNA (RNA) serve as negative controls. bp: base pairs of the DNA marker. B: Expression of KLF2 was quantified using TaqMan-PCR as in figure 3. Relative expression levels compared to GUSB were normalized to gene expression in serum-starved HMC-1(V560G c-Kit) cells. Average values from six independent PCR reactions + SEM are shown.