DNp63 alters ErbB family signaling profile in the ‘neural’
LK2 cells. A, Human phospho-receptor tyrosine kinase array was
performed for GFP-overexpressed and DNp63-overexpressed LK2 cells.
B, Protein expression of ErbB4, phospho-ErbB4, ErbB3,
phospho-ErbB3, EGFR, phospho-EGFR, phospho-Akt and phospho-Erk1/2 and
β-Actin as a loading control in GFP-overexpressed and DNp63-overexpressed
LK2 cells. Cells were serum-starved for 4 hours, and then incubated with
anti-ErbB4 monoclonal antibody at the indicated concentrations for 15 minutes,
followed by stimulation with NRG1 for 30 minutes at the indicated
concentrations. C, Cell proliferation of GFP-overexpressed and
DNp63-overexpressed LK2 cells. Cells were cultured with 5% FBS and with or
without NRG-1 (100 ng/ml) and anti-ErbB4 monoclonal antibody (25 μg/ml)
for 4 days. Mean ± SD of sextuplicates are shown. **,
P<0.001 and N.S., not significant
(P>0.05), t-test with Bonferroni
correction.