Roles of ERK, PI3 kinase, and PLC-γ pathways induced by overexpression of translationally controlled tumor protein in HeLa cells

Moonhee Kim, Jaehoon Jung, Kyunglim Lee

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

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 languageEnglish
Pages (from-to)82-87
Number of pages6
JournalArchives of Biochemistry and Biophysics
Volume485
Issue number1
DOIs
StatePublished - 1 May 2009

Keywords

  • EGFR
  • ERK
  • Na,K-ATPase
  • Ouabain
  • PI3K
  • PLC-γ
  • TCTP

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