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Combining chemotherapeutic agents and netrin-1 interference potentiates cancer cell death

Andrea Paradisi1, Marion Creveaux, Benjamin Gibert

  • 1Apoptosis, Cancer and Development Laboratory - Equipe labellisée 'La Ligue', LabEx DEVweCAN, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon, France.

EMBO Molecular Medicine
|December 3, 2013
PubMed

Insights

Chemotherapy drugs like Doxorubicin increase cancer cell survival by upregulating netrin-1. Blocking netrin-1 signaling enhances chemotherapy effectiveness, suggesting a promising new cancer treatment strategy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Therapeutics

Background:

  • Netrin-1, a secreted factor, is upregulated in some cancers, promoting tumor cell survival by inhibiting apoptosis.
  • Netrin-1 dependence receptors (DCC and UNC5H) mediate this anti-apoptotic effect.
  • Targeting the netrin-1 pathway is a potential therapeutic strategy to overcome cancer resistance.

Purpose of the Study:

  • To investigate the role of netrin-1 upregulation in response to conventional chemotherapies.
  • To evaluate the efficacy of combining netrin-1 interference with chemotherapy in preclinical cancer models.

Main Methods:

  • Assessed netrin-1 and receptor expression in human cancer cell lines treated with Doxorubicin, 5-Fluorouracil, Paclitaxel, and Cisplatin.
  • Utilized siRNA to silence netrin-1 and evaluated its impact on cancer cell death.
  • Tested the efficacy of netrin-1 pathway inhibitors in combination with chemotherapies in vitro.
  • Evaluated the combined treatment efficacy in a xenograft mouse model.

Main Results:

  • Chemotherapy treatments (Doxorubicin, 5-Fluorouracil, Paclitaxel, Cisplatin) increased netrin-1 and receptor expression in cancer cells, a p53-dependent survival mechanism.
  • Netrin-1 silencing potentiated Doxorubicin-induced cancer cell death.
  • Netrin-1 interference drugs enhanced the cancer cell-killing effects of Doxorubicin, Cisplatin, and 5-Fluorouracil in vitro.
  • In vivo, Doxorubicin treatment upregulated tumor netrin-1, enhancing the anti-tumor effect of a netrin-1 interfering drug.

Conclusions:

  • Netrin-1 upregulation is a survival response to chemotherapy, contributing to treatment resistance.
  • Combining conventional chemotherapies with netrin-1 pathway interference represents a promising strategy to improve cancer treatment outcomes.
Keywords:
DCCcancer therapydependence receptornetrin-1, p53

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