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Interferon (IFN)-beta induces apoptotic cell death in DHL-4 diffuse large B cell lymphoma cells through tumor

Amaylia Oehadian1, Naoki Koide, Mya Mya Mu

  • 1Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi 480-1195, Japan.

Cancer Letters
|June 1, 2005
PubMed

Insights

Interferon-beta significantly inhibits diffuse large B cell lymphoma (DHL-4) growth by inducing apoptosis. This effect is mediated through the tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) pathway.

Area of Science:

  • Immunology
  • Oncology
  • Cell Biology

Background:

  • Diffuse large B cell lymphoma (DHL-4) is an aggressive non-Hodgkin lymphoma.
  • Interferons (IFNs) are cytokines with known immunomodulatory and antiproliferative effects.
  • Differential responses of cancer cells to various IFN subtypes necessitate specific investigations.

Purpose of the Study:

  • To investigate the effects of interferon-alpha (IFN-α), interferon-beta (IFN-β), and interferon-gamma (IFN-γ) on DHL-4 cell growth.
  • To elucidate the mechanism of action for any observed anti-proliferative effects of IFNs on DHL-4 cells.

Main Methods:

  • Cell culture of DHL-4 diffuse large B cell lymphoma.
  • Treatment with IFN-α, IFN-β, and IFN-γ.
  • Assessment of cell viability and apoptosis markers (DNA fragmentation, caspase 3 activation, annexin V binding).
  • Analysis of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) mRNA expression and blockade studies with anti-TRAIL antibody.

Main Results:

  • IFN-β significantly inhibited DHL-4 cell growth, with a stronger effect than IFN-α.
  • IFN-γ showed no inhibitory effect due to the absence of IFN-γ receptors on DHL-4 cells.
  • IFN-β induced apoptotic cell death, evidenced by DNA fragmentation, caspase 3 activation, and annexin V binding.
  • IFN-β treatment upregulated TRAIL mRNA expression.
  • Blocking TRAIL with an antibody significantly reduced IFN-β-induced apoptosis.

Conclusions:

  • IFN-β is a potent inhibitor of DHL-4 cell proliferation.
  • IFN-β induces apoptosis in DHL-4 cells, likely via the TRAIL pathway.
  • The differential expression of IFN receptors influences treatment efficacy in lymphoma cells.

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