, Volume 8, Issue 3, pp 237–249 | Cite as

Apoptosis and interferons: Role of interferon-stimulated genes as mediators of apoptosis

  • M. Chawla-Sarkar
  • D. J. Lindner
  • Y.-F. Liu
  • B. R. Williams
  • G. C. Sen
  • R. H. Silverman
  • E. C. Borden


IFNs are a family of cytokines with pleiotropic biological effects mediated by scores of responsive genes. IFNs were the first human proteins to be effective in cancer therapy and were among the first recombinant DNA products to be used clinically. Both quality and quantity of life has been improved in response to IFNs in various malignancies. Despite its beneficial effects, unraveling the mechanisms of the anti-tumor effects of IFN has proven to be a complex task. IFNs may mediate anti-tumor effects either indirectly by modulating immunomodulatory and anti-angiogenic responses or by directly affecting proliferation or cellular differentiation of tumor cells. Both direct or indirect effects of IFNs result from induction of a subset of genes, called IFN stimulated genes (ISGs). In addition to the ISGs implicated in anti-viral, anti-angiogenic, immunomodulatory and cell cycle inhibitory effects, oligonucleotide microarray studies have identified ISGs with apoptotic functions. These include TNF-α related apoptosis inducing ligand (TRAIL/Apo2L), Fas/FasL, XIAP associated factor-1 (XAF-1), caspase-4, caspase-8, dsRNA activated protein kinase (PKR), 2'5'A oligoadenylate synthetase (OAS), death activating protein kinases (DAP kinase), phospholipid scramblase, galectin 9, IFN regulatory factors (IRFs), promyelocytic leukemia gene (PML) and regulators of IFN induced death (RIDs). In vitro IFN-α, IFN-β and IFN-γ induced apoptosis in multiple cell lines of varied histologies. This review will emphasize possible mechanisms and the role of ISGs involved in mediating apoptotic function of IFNs.

angiogenesis anti-tumor apoptosis interferon ISGs 


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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • M. Chawla-Sarkar
    • 1
  • D. J. Lindner
    • 1
  • Y.-F. Liu
    • 1
  • B. R. Williams
    • 2
  • G. C. Sen
    • 3
  • R. H. Silverman
    • 2
  • E. C. Borden
    • 1
  1. 1.Center for Drug Discovery and Development, Taussig Cancer CenterCleveland Clinic FoundationCleveland
  2. 2.Department of Cancer BiologyLerner Research Institute, Cleveland Clinic FoundationCleveland
  3. 3.Department of Molecular BiologyLerner Research Institute, Cleveland Clinic FoundationCleveland

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