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Following the TRAIL to apoptosis

Bharti R Chaudhari1, Richard F Murphy, Devendra K Agrawal

  • 1Department of Biomedical Sciences, Creighton University School of Medicine, Omaha, NE 68178, USA.

Immunologic Research
|December 19, 2006
PubMed

Insights

Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) triggers programmed cell death in harmful cells, including cancer. TRAIL analogs show therapeutic potential for asthma and cancer treatment.

Area of Science:

  • Cell Biology
  • Immunology
  • Molecular Biology

Background:

  • Apoptosis, or programmed cell death, is crucial for eliminating damaged cells.
  • TRAIL (Tumor necrosis factor-related apoptosis-inducing ligand), a TNF superfamily member, induces apoptosis via death receptors DR-4/DR-5 and extrinsic pathways.
  • TRAIL's function is modulated by decoy receptors (DcR-1/DcR-2) and regulators like FADD, IAPs, Bcl-2s, p53, and FLIPs.

Purpose of the Study:

  • To investigate the role of TRAIL in asthma pathogenesis.
  • To explore the therapeutic potential of TRAIL analogs in asthma and cancer.

Main Methods:

  • Analysis of TRAIL expression in asthma-related cells (eosinophils, mast cells, fibroblasts, airway epithelial cells).
  • Examination of TRAIL's interaction with transforming growth factor-beta1 (TGF-beta1) pathways in airway remodeling.
  • Review of TRAIL's mechanisms in selective cancer cell apoptosis.

Main Results:

  • TRAIL is expressed in cells implicated in asthma and airway remodeling.
  • TGF-beta1-induced apoptosis overlaps with TRAIL pathways, potentially hindering epithelial repair.
  • TRAIL selectively induces apoptosis in cancer cells.

Conclusions:

  • TRAIL plays a role in asthma pathophysiology and airway remodeling.
  • TRAIL-based therapies, including analogs, hold promise for treating asthma and cancer due to selective cancer cell killing properties.

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