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Article

Oncogene-mediated tumor transformation sensitizes cells to autophagy induction

  • Authors:
    • Ricardo Gargini
    • Vega García-Escudero
    • Marta Izquierdo
    • Francisco Wandosell
  • View Affiliations / Copyright

    Affiliations: Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autonoma de Madrid, 28049 Madrid, Spain
  • Pages: 3689-3695
    |
    Published online on: March 23, 2016
       https://doi.org/10.3892/or.2016.4699
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Abstract

The process of tumorigenesis induces alterations in numerous cellular pathways including the main eukaryotic metabolic routes. It has been recently demonstrated that autophagy is part of the oncogene-induced senescence phenotype although its role in tumor establishment has not been completely clarified. In the present study, we showed that non‑transformed cells are sensitized to mitochondrial stress and autophagy induction when they are transformed by oncogenes such as c-Myc or Ras. We observed that overexpression of c-Myc or Ras increased AMP-activated protein kinase (AMPK) phosphorylation and the expression of p62, a known partner for degradation by autophagy. The activation of AMPK was found to favor the activation of FoxO3 which was prevented by the inhibition of AMPK. The transcriptional activation mediated by FoxO3 upregulated genes such as BNIP3 and LC3. Finally, the transformation by oncogenes such as c-Myc and Ras predisposes tumor cells to autophagy induction as a consequence of mitochondrial stress and impairs tumor growth in vitro and in vivo, which may have therapeutic implications.
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Copy and paste a formatted citation
Spandidos Publications style
Gargini R, García-Escudero V, Izquierdo M and Wandosell F: Oncogene-mediated tumor transformation sensitizes cells to autophagy induction. Oncol Rep 35: 3689-3695, 2016.
APA
Gargini, R., García-Escudero, V., Izquierdo, M., & Wandosell, F. (2016). Oncogene-mediated tumor transformation sensitizes cells to autophagy induction. Oncology Reports, 35, 3689-3695. https://doi.org/10.3892/or.2016.4699
MLA
Gargini, R., García-Escudero, V., Izquierdo, M., Wandosell, F."Oncogene-mediated tumor transformation sensitizes cells to autophagy induction". Oncology Reports 35.6 (2016): 3689-3695.
Chicago
Gargini, R., García-Escudero, V., Izquierdo, M., Wandosell, F."Oncogene-mediated tumor transformation sensitizes cells to autophagy induction". Oncology Reports 35, no. 6 (2016): 3689-3695. https://doi.org/10.3892/or.2016.4699
Copy and paste a formatted citation
x
Spandidos Publications style
Gargini R, García-Escudero V, Izquierdo M and Wandosell F: Oncogene-mediated tumor transformation sensitizes cells to autophagy induction. Oncol Rep 35: 3689-3695, 2016.
APA
Gargini, R., García-Escudero, V., Izquierdo, M., & Wandosell, F. (2016). Oncogene-mediated tumor transformation sensitizes cells to autophagy induction. Oncology Reports, 35, 3689-3695. https://doi.org/10.3892/or.2016.4699
MLA
Gargini, R., García-Escudero, V., Izquierdo, M., Wandosell, F."Oncogene-mediated tumor transformation sensitizes cells to autophagy induction". Oncology Reports 35.6 (2016): 3689-3695.
Chicago
Gargini, R., García-Escudero, V., Izquierdo, M., Wandosell, F."Oncogene-mediated tumor transformation sensitizes cells to autophagy induction". Oncology Reports 35, no. 6 (2016): 3689-3695. https://doi.org/10.3892/or.2016.4699
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