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Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
Published on: December 27, 2016
Danger signalling during cancer cell death: origins, plasticity and regulation
1Cell Death Research and Therapy (CDRT) Unit, Department of Molecular and Cell Biology, University of Leuven (KU Leuven), Leuven, Belgium.
Abstract:
Accumulating data indicates that following anti-cancer treatments, cancer cell death can be perceived as immunogenic or tolerogenic by the immune system. The former is made possible due to the ability of certain anti-cancer modalities to induce immunogenic cell death (ICD) that is associated with the emission of damage-associated molecular patterns (DAMPs), which assist in unlocking a sequence of events leading to the development of anti-tumour immunity. In response to ICD inducers, activation of endoplasmic reticulum (ER) stress has been identified to be indispensable to confer the immunogenic character of cancer cell death, due to its ability to coordinate the danger signalling pathways responsible for the trafficking of vital DAMPs and subsequent anti-cancer immune responses. However, in recent times, certain processes apart from ER stress have emerged (e.g., autophagy and possibly viral response-like signature), which have the ability to influence danger signalling. In this review, we discuss the molecular nature, emerging plasticity in the danger signalling mechanisms and immunological impact of known DAMPs in the context of immunogenic cancer cell death. We also discuss key effector mechanisms modulating the interface between dying cancer cells and the immune cells, which we believe are crucial for the therapeutic relevance of ICD in the context of human cancers, and also discuss the influence of experimental conditions and animal models on these.
Insights
Cancer treatments can trigger immune responses through immunogenic cell death (ICD), releasing damage-associated molecular patterns (DAMPs). Understanding DAMPs and danger signaling is key to developing effective cancer immunotherapies.
Area of Science:
- Immunology
- Oncology
- Molecular Biology
Background:
- Anti-cancer treatments can induce cancer cell death perceived as immunogenic or tolerogenic.
- Immunogenic cell death (ICD) involves damage-associated molecular patterns (DAMPs) that promote anti-tumor immunity.
- Endoplasmic reticulum (ER) stress is crucial for ICD by coordinating DAMPs trafficking and immune responses.
Purpose of the Study:
- To review the molecular mechanisms of DAMPs in ICD.
- To discuss the plasticity of danger signaling pathways.
- To explore the immunological impact and therapeutic relevance of ICD in human cancers.
Main Methods:
- Literature review focusing on molecular mechanisms of ICD.
- Analysis of danger signaling pathways beyond ER stress (e.g., autophagy).
- Discussion of effector mechanisms at the cancer-immune cell interface.
Main Results:
- ICD is a critical mechanism for eliciting anti-tumor immunity.
- ER stress plays a vital role in initiating ICD.
- Emerging pathways like autophagy also influence danger signaling in ICD.
Conclusions:
- DAMPs and their signaling pathways are crucial for ICD's therapeutic potential.
- Understanding the interplay between dying cancer cells and immune cells is essential for cancer therapy.
- Experimental models and conditions significantly influence observed ICD effects.
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