NM23H2 inhibits EGF- and Ras-induced proliferation of NIH3T3 cells by blocking the ERK pathway

Mi Young Lee, Woo Jeong Jeong, Jong Won Oh, Kang Yell Choi

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The NM23 family proteins are involved in a variety of biological processes including tumor metastasis, development, and differentiation; however, their functions in the regulation of cellular proliferation are poorly understood. We have investigated the role of one NM23 family protein, NM23H2, in the regulation of cellular proliferation directed by the extracellular signal regulated kinase (ERK) pathway. The activity of ERKs was enhanced by knockdown of endogenous NM23H2 and blocked by overexpression of NM23H2 in both NIH3T3 and HEK293 cells. Additionally, the epidermal growth factor (EGF)- and oncogenic Ras(G12R)-induced proliferation of both HEK293 and NIH3T3 cells was reduced by NM23H2 overexpression. Furthermore, activation of Raf-1, MEK and the ERKs by either EGF or Ras(G12R) was inhibited by NM23H2 overexpression. Together, our data indicate that NM23H2 is a negative regulator of cellular proliferation stimulated by EGF- and Ras-mediated activation of the ERK pathway.

Original languageEnglish
Pages (from-to)221-226
Number of pages6
JournalCancer Letters
Volume275
Issue number2
DOIs
Publication statusPublished - 2009 Mar 18

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

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