Ras-dependent carbon metabolism and transformation in mouse fibroblasts

F. Chiaradonna, E. Sacco, R. Manzoni, M. Giorgio, M. Vanoni, L. Alberghina

Research output: Contribution to journalArticlepeer-review

Abstract

Mutational activation of ras genes is required for the onset and maintenance of different malignancies. Here we show, using a combination of molecular physiology, nutritional perturbations and transcriptional profiling, that full penetrance of phenotypes related to oncogenic Ras activation, including the shift of carbon metabolism towards fermentation and upregulation of key cell cycle regulators, is dependent upon glucose availability. These responses are induced by Ras activation, being specifically reverted by downregulation of the Ras pathway obtained through the expression of a dominant-negative Ras-specific guanine nucleotide exchange protein. Our data allow to link directly to ras activation the alteration in energy metabolism of cancer cells, their fragility towards glucose shortage and ensuing apoptotic death.

Original languageEnglish
Pages (from-to)5391-5404
Number of pages14
JournalOncogene
Volume25
Issue number39
DOIs
Publication statusPublished - Aug 31 2006

Keywords

  • Apoptosis
  • Cell cycle
  • Glucose metabolism
  • Ras
  • Transformed cells

ASJC Scopus subject areas

  • Molecular Biology
  • Cancer Research
  • Genetics

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