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Published on: August 2, 2021
TRAIL and apoptosis induction by TNF-family death receptors
Shulin Wang1, Wafik S El-Deiry
1Department of Medicine, and the Abramson Cancer Center, Howard Hughes Medical Institute, University of Pennsylvania, Philadelphia, PA 19104, USA.
Abstract:
Tumor necrosis factor-related apoptosis-inducing ligand or Apo 2 ligand (TRAIL/Apo2L) is a member of the tumor necrosis factor (TNF) family of ligands capable of initiating apoptosis through engagement of its death receptors. TRAIL selectively induces apoptosis of a variety of tumor cells and transformed cells, but not most normal cells, and therefore has garnered intense interest as a promising agent for cancer therapy. TRAIL is expressed on different cells of the immune system and plays a role in both T-cell- and natural killer cell-mediated tumor surveillance and suppression of suppressing tumor metastasis. Some mismatch-repair-deficient tumors evade TRAIL-induced apoptosis and acquire TRAIL resistance through different mechanisms. Death receptors, members of the TNF receptor family, signal apoptosis independently of the p53 tumor-suppressor gene. TRAIL treatment in combination with chemo- or radiotherapy enhances TRAIL sensitivity or reverses TRAIL resistance by regulating the downstream effectors. Efforts to identify agents that activate death receptors or block specific effectors may improve therapeutic design. In this review, we summarize recent insights into the apoptosis-signaling pathways stimulated by TRAIL, present our current understanding of the physiological role of this ligand and the potential of its application for cancer therapy and prevention.
Insights
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) selectively triggers cancer cell death, offering a promising avenue for cancer therapy. Research explores TRAIL
Area of Science:
- Oncology
- Immunology
- Molecular Biology
Background:
- Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL/Apo2L) is a TNF family member initiating apoptosis via death receptors.
- TRAIL selectively induces apoptosis in tumor cells, not most normal cells, making it a promising cancer therapeutic agent.
- TRAIL plays a role in immune surveillance and suppressing tumor metastasis.
Purpose of the Study:
- To review recent insights into TRAIL-stimulated apoptosis-signaling pathways.
- To present the current understanding of TRAIL's physiological role.
- To discuss the potential application of TRAIL in cancer therapy and prevention.
Main Methods:
- Review of existing literature on TRAIL signaling and function.
- Analysis of mechanisms of TRAIL resistance in tumors.
- Exploration of combination therapies involving TRAIL.
Main Results:
- TRAIL selectively induces apoptosis in various tumor cells.
- Some tumors develop TRAIL resistance through various mechanisms.
- TRAIL in combination with chemo- or radiotherapy can enhance sensitivity or reverse resistance.
Conclusions:
- TRAIL is a promising agent for cancer therapy and prevention.
- Understanding TRAIL resistance mechanisms is crucial for therapeutic design.
- Further research into agents that activate death receptors or block effectors may improve TRAIL-based therapies.
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