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Enhancement of Apoptotic and Autophagic Induction by a Novel Synthetic C-1 Analogue of 7-deoxypancratistatin in Human Breast Adenocarcinoma and Neuroblastoma Cells with Tamoxifen
19:44

Enhancement of Apoptotic and Autophagic Induction by a Novel Synthetic C-1 Analogue of 7-deoxypancratistatin in Human Breast Adenocarcinoma and Neuroblastoma Cells with Tamoxifen

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EMT impairs breast carcinoma cell susceptibility to CTL-mediated lysis through autophagy induction

Intissar Akalay1, Bassam Janji, Meriem Hasmim

  • 1Unité INSERM U753; Institut de Cancérologie Gustave Roussy; Villejuif, France.

Autophagy
|May 3, 2013
PubMed

Insights

Epithelial to mesenchymal transition (EMT) promotes cancer immune escape by inducing resistance to cytotoxic T-lymphocytes (CTLs) through autophagy. Silencing BECN1 reversed this resistance, offering potential for novel cancer immunotherapies.

Area of Science:

  • Cancer Biology
  • Immunology
  • Cellular Biology

Background:

  • Epithelial to mesenchymal transition (EMT) is crucial for cancer invasion, metastasis, and drug resistance.
  • The molecular mechanisms underlying EMT-induced immune escape are not fully understood.
  • EMT influences tumor cell recognition and susceptibility to lysis.

Purpose of the Study:

  • To investigate the role of EMT in cancer immune escape.
  • To elucidate the molecular basis of EMT-induced resistance to cytotoxic T-lymphocytes (CTLs).
  • To explore the connection between EMT, autophagy, and immune evasion.

Main Methods:

  • Analysis of EMT-induced changes in target cell recognition and lysis sensitivity.
  • Investigating the correlation between EMT and autophagy induction.
  • Experimental silencing of BECN1 in EMT-derived cells.

Main Results:

  • EMT was found to regulate target cell recognition and sensitivity to lysis.
  • EMT-induced tumor cell resistance to CTLs correlated with autophagy induction.
  • Silencing BECN1 in EMT cells restored susceptibility to CTL-induced lysis.

Conclusions:

  • EMT contributes to immune escape by inducing resistance to CTLs, partly via autophagy.
  • Targeting the EMT-autophagy interplay may offer novel immunotherapy strategies.
  • Further understanding of EMT and autophagy reciprocal regulation is key for future tumor immunotherapy design.
Keywords:
autophagybreast cancercytotoxic T-lymphocytesepithelial mesenchymal transition

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