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Updated: Mar 7, 2026

Modified Annexin V/Propidium Iodide Apoptosis Assay For Accurate Assessment of Cell Death
Published on: April 24, 2011
IAPs and Cell Death
1The Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, 3052, Australia. silke@wehi.edu.au.
Abstract:
IAPs were named as inhibitors of apoptosis, programmed cell death, but it has become apparent that they are regulators of other types of cell death too. Because they inhibit cell death in cancer cells there has been an intense interest in developing inhibitors of these proteins to induce or sensitise cancer cells to death. In this article, we will discuss the involvement of IAPs in the apoptosis, necroptosis and pyroptosis programmed cell death paradigms. All these types of cell death are intimately involved with causing or repressing inflammation and it should perhaps therefore come as no surprise that IAPs are also involved in regulating inflammation directly. To come full circle, the IAP antagonist drugs that were developed to sensitise cancer cells to apoptosis have led to some of these insights.
Insights
Inhibitors of Apoptosis Proteins (IAPs) regulate multiple cell death types beyond apoptosis, including necroptosis and pyroptosis. Understanding IAPs offers new strategies for cancer therapy and inflammation control.
Area of Science:
- Cell Biology
- Immunology
- Oncology
Background:
- Inhibitors of Apoptosis Proteins (IAPs) were initially identified for their role in preventing programmed cell death (apoptosis).
- Emerging evidence indicates IAPs also regulate other cell death pathways, such as necroptosis and pyroptosis.
- Their involvement in cell death processes, particularly in cancer, has spurred interest in developing IAP inhibitors.
Purpose of the Study:
- To discuss the multifaceted roles of IAPs in apoptosis, necroptosis, and pyroptosis.
- To explore the connection between IAP-mediated cell death and inflammatory responses.
- To highlight how IAP antagonists, developed for cancer therapy, have advanced our understanding of these processes.
Main Methods:
- Literature review and synthesis of existing research on IAPs.
- Analysis of IAP involvement across different programmed cell death paradigms.
- Examination of the link between IAPs, cell death, and inflammation.
Main Results:
- IAPs are key regulators not only of apoptosis but also of necroptosis and pyroptosis.
- These cell death pathways are intrinsically linked to the modulation of inflammation.
- IAPs play a direct role in regulating inflammatory processes.
- IAP antagonist drugs have been instrumental in uncovering these broader functions.
Conclusions:
- IAPs are crucial regulators of diverse cell death pathways, extending beyond apoptosis.
- The interplay between IAPs, cell death, and inflammation is significant.
- Targeting IAPs holds therapeutic potential for cancer and inflammatory diseases.
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