Compound 8 inhibits MARCKS phosphorylation,
cell proliferation, and invasion following treatment with 8. (A) HeLa cells were starved for 16 h in medium without fetal calf
serum. Subsequently, they were treated with 50 μM solution of
compound 8 for 30 min and 100 nM TPA for the last 10
min. An amount of 150 μg of protein from lysed cells was loaded
onto SDS 8–16% gels. Tubulin was used as loading control. Below
a representative blot, a bar graph corresponding to quantitative scans
of three independent experiments (±SD) is shown. (B) Cell proliferation
following treatment of HeLa and PC-3 cells with 8. The
mean values (±SD) of three independent experiments, in which
three samples were taken within each experiment, are shown. (C) Invasion of
cells through a membrane. Cell invasion was determined as described
in Experimental Section. In HeLa cells with
a doxycycline-inducible PKCε the expression of PKCε was
induced with doxycycline (control + Dox). The mean of three experiments
(±SD) is shown: (∗) p = 0.03. The data
are normalized to the control (100%). Therefore, the standard deviation for the control is 0.