Abstract
We reported previously that translationally controlled tumor protein (TCTP) is a cytoplasmic repressor of Na,K-ATPase in HeLa cells. In the current study, we showed that TCTP overexpression using adenovirus as vehicle, induced partial inhibition of Na,K-ATPase; phosphorylation of EGFR tyrosine residues 845, 992, 1068, and 1148; activation of Ras/Raf/ERK pathway; activation of PI3K/Akt pathway; and phosphorylation of PLC-γ in HeLa cells. Specific inhibition of PI3K/Akt pathway in contrast to the inhibition of ERK, significantly decreased TCTP overexpression-induced survival signal. Inhibition of PLC-γ pathway significantly decreased TCTP overexpression-induced cell migration but inhibition of ERK had less effect. These results suggest that TCTP plays a key physiological role in cell survival through Akt pathway and migration through PLC-γ pathway.
Original language | English |
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Pages (from-to) | 82-87 |
Number of pages | 6 |
Journal | Archives of Biochemistry and Biophysics |
Volume | 485 |
Issue number | 1 |
DOIs | |
State | Published - 1 May 2009 |
Keywords
- EGFR
- ERK
- Na,K-ATPase
- Ouabain
- PI3K
- PLC-γ
- TCTP