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Cytokine-induced tumor suppressors: a GRIM story

Dhan V Kalvakolanu1, Shreeram C Nallar, Sudhakar Kalakonda

  • 1Department of Microbiology & Immunology, Marlene & Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA. dkalvako@umaryland.edu

Cytokine
|April 13, 2010
PubMed

Insights

Retinoid-Interferon-induced Mortality (GRIM) genes, like GRIM-19, are crucial for suppressing tumor cell growth. These novel tumor suppressors also play a role in innate immunity, linking multiple biological responses.

Area of Science:

  • Molecular biology
  • Cancer research
  • Immunology

Background:

  • Interferon (IFN) cytokines inhibit cell growth.
  • Retinoic acid (RA) enhances IFN's tumor-suppressive effects.
  • Identifying genes mediating IFN/RA-induced growth suppression is critical.

Purpose of the Study:

  • To identify genes involved in IFN/RA-induced tumor cell growth suppression.
  • To elucidate the molecular mechanisms of these identified genes.
  • To explore the role of these genes in innate immunity.

Main Methods:

  • Genome-wide expression-knockout screening.
  • Identification of novel Retinoid-Interferon-induced Mortality (GRIM) genes.
  • Molecular mechanism analysis of GRIM-19.

Main Results:

  • Discovery of novel GRIM genes critical for IFN/RA-induced growth suppression.
  • GRIM-19 identified as a key protein with multiple growth control and cell death pathways.
  • GRIM-19 demonstrated involvement in innate immune responses modulated by pathogens.

Conclusions:

  • GRIM genes, particularly GRIM-19, represent a new class of tumor suppressors.
  • GRIM-19 integrates multiple biological responses, acting at critical regulatory nodes.
  • GRIM proteins are crucial for both cancer suppression and innate immunity.

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