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Tumor promoting effects of CD95 signaling in chemoresistant cells

Elisabet Ametller1, Susana García-Recio, Domizziana Costamagna

  • 1Medical Oncology, Institut d'Investigacions Biomèdiques Agustí Pi y Sunyer (IDIBAPS), Institut Clínic de Malalties Hemato-Oncològiques (ICMHO), Hospital Clínic, Facultat de Medicina, Universitat de Barcelona, Spain.

Molecular Cancer
|June 25, 2010
PubMed
Abstract

Insights

Oxaliplatin-resistant colon cancer cells activate CD95 signaling, promoting tumor growth and metastasis. This pathway drives epithelial-mesenchymal transition (EMT), increasing cell migration and contributing to a metastatic phenotype.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • CD95 (death receptor) regulates apoptosis and tumor growth.
  • Oxaliplatin resistance in colon cancer involves decreased CD95 expression and impaired cell death signaling.
  • CD95 signaling plays a dual role in cancer, influencing both cell death and pro-tumorigenic activities.

Purpose of the Study:

  • To investigate CD95 signaling in oxaliplatin-resistant colon cancer cells.
  • To characterize cellular responses mediated by CD95 in chemoresistant cells.
  • To understand the role of CD95 in promoting tumor progression during oxaliplatin resistance.

Main Methods:

  • Utilized siRNA to inhibit CD95 expression.
  • Assessed cell migration and adhesion in resistant colon cancer cells.
  • Analyzed epithelial-mesenchymal transition (EMT) markers in vitro and in vivo.

Main Results:

  • CD95 triggering enhanced metastatic potential in resistant cells.
  • Oxaliplatin treatment stimulated cell migration and reduced cell adhesion via CD95 activation.
  • CD95 inhibition blocked oxaliplatin's pro-migratory effects, indicating a key role in EMT.

Conclusions:

  • Oxaliplatin resistance engages CD95 signaling to promote tumor-promoting effects.
  • CD95 activation induces epithelial-mesenchymal transition (EMT) in chemoresistant colon cancer cells.
  • Combined CD95 signaling and EMT induction contribute to a metastatic phenotype in oxaliplatin-resistant colon cancer.

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