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IFN Signaling and ICB Resistance: Time is on Tumor's Side

Alejandro López-Soto1, Segundo Gonzalez1, Alicia R Folgueras2

  • 1Departamento de Biología Funcional, Inmunología, Facultad de Medicina, Instituto Universitario de Oncología (IUOPA), Universidad de Oviedo, 33006 Oviedo, Spain.

Trends in Cancer
|July 19, 2017
PubMed

Insights

Immune checkpoint blockade (ICB) can activate antitumor immunity, but resistance is common. Sustained interferon (IFN) signaling drives this resistance by creating an immunosuppressive tumor environment, hindering effective cancer therapy.

Area of Science:

  • Immunology
  • Cancer Biology
  • Molecular Oncology

Background:

  • Immune checkpoint blockade (ICB) is a promising cancer immunotherapy.
  • Resistance to ICB is a significant clinical challenge, limiting treatment efficacy.
  • Understanding mechanisms of ICB resistance is crucial for improving patient outcomes.

Purpose of the Study:

  • To investigate the molecular mechanisms underlying tumor resistance to immune checkpoint blockade.
  • To identify key signaling pathways that promote resistance to ICB therapy.
  • To elucidate how tumor cells evade immune responses during ICB treatment.

Main Methods:

  • Analysis of gene expression profiles in tumors resistant to ICB.
  • Investigating the role of interferon (IFN) signaling in modulating the tumor microenvironment.
  • Utilizing preclinical cancer models to study ICB resistance mechanisms.

Main Results:

  • Sustained interferon (IFN) signaling was identified as a key driver of ICB resistance.
  • IFN signaling induces a specific immunosuppressive multigenic program in tumor cells.
  • This program actively suppresses antitumor immune responses, leading to treatment failure.

Conclusions:

  • Sustained IFN signaling confers resistance to ICB by reprogramming the tumor microenvironment.
  • Targeting IFN-induced immunosuppressive pathways may overcome ICB resistance.
  • This finding offers a potential strategy to enhance the effectiveness of cancer immunotherapies.

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