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Autophagy control by the VEGF-C/NRP-2 axis in cancer and its implication for treatment resistance

Marissa J Stanton1, Samikshan Dutta, Heyu Zhang

  • 1Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA.

Cancer Research
|November 15, 2012
PubMed

Insights

The VEGF-C/NRP-2 pathway activates autophagy, promoting cancer cell survival during therapy. Inhibiting this axis and targeting WDFY-1 may offer new cancer treatment strategies.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cellular Biology

Background:

  • Cancer recurrence and metastasis are major causes of mortality.
  • Understanding therapy resistance mechanisms is crucial for developing new cancer treatments.
  • Autophagy, a cellular self-degradation process, plays a role in cancer cell survival.
  • The VEGF-C/NRP-2 signaling pathway has been implicated in various cancers.

Purpose of the Study:

  • To investigate the role of the VEGF-C/NRP-2 axis in cancer therapy resistance.
  • To elucidate the molecular mechanisms by which this axis promotes cancer cell survival.
  • To identify potential therapeutic targets within this pathway.

Main Methods:

  • Investigated the involvement of the VEGF-C/NRP-2 axis in autophagy activation.
  • Examined the effect of this axis on mTOR complex 1 activity.
  • Identified and analyzed VEGF-C/NRP-2-regulated genes, LAMP-2 and WDFY-1.
  • Assessed the impact of WDFY-1 modulation on cell death following chemotherapy.

Main Results:

  • The VEGF-C/NRP-2 axis activates autophagy, enhancing cancer cell survival post-treatment.
  • This pathway inhibits mTOR complex 1 activity, leading to autophagy.
  • LAMP-2 and WDFY-1 were identified as key VEGF-C/NRP-2-regulated genes involved in autophagy and vesicular trafficking.
  • WDFY-1 upregulation upon VEGF-C or NRP-2 depletion promoted cell death induced by cytotoxic drugs.

Conclusions:

  • The VEGF-C/NRP-2 axis is linked to cancer cell survival under chemotherapy stress by activating autophagy.
  • Targeting the VEGF-C/NRP-2 pathway, potentially through WDFY-1, could represent a novel therapeutic strategy for overcoming cancer therapy resistance.

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