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Published on: January 20, 2023
Wiring and rewiring PANoptosis: Molecular vulnerabilities for targeting inflammatory cell death in human disease
Kirti Upmanyu1, Saurabh Upadhyay2
1Department of Biosciences, Jamia Millia Islamia, New Delhi, India.
Abstract:
PANoptosis represents a unified inflammatory cell death program that mechanistically integrates pyroptosis, apoptosis, and necroptosis through multiprotein complexes known as PANoptosomes. While prior models treated these death pathways as distinct, emerging evidence reveals their convergence through shared sensors, signaling adaptors, and executioners-allowing cells to bypass immune evasion strategies by pathogens or tumors. Despite its biological importance, a cohesive mechanistic framework for PANoptosis has remained elusive. In this review, we present a novel, sensor-specific dissection of PANoptosome architecture, detailing how distinct innate immune sensors-ZBP1, RIPK1, AIM2, and NLRP12 serve as organizing hubs for context-dependent activation of inflammatory cell death. We integrate this with a cross-pathway analysis of caspase-8, RIP kinases, and gasdermins, revealing PANoptosis as a highly adaptable logic circuit governing immune activation and cell fate. We further chart the dual roles of PANoptosis across disease contexts-highlighting its protective functions in infection and tumor suppression, as well as its detrimental consequences in cytokine storms, neurodegeneration, and multi-organ failure. By comparing sensor-driven outcomes across organs and disease states, we propose new therapeutic entry points for modulating PANoptotic signaling with precision. This review offers a mechanistically integrated and translationally focused roadmap to PANoptosis, establishing it as a master regulator of inflammatory cell death and a frontier for next-generation immune interventions.
Insights
PANoptosis integrates pyroptosis, apoptosis, and necroptosis via PANoptosomes. This unified inflammatory cell death pathway offers new therapeutic targets for immune regulation and disease treatment.
Area of Science:
- Immunology
- Cell Biology
- Molecular Medicine
Background:
- Inflammatory cell death pathways like pyroptosis, apoptosis, and necroptosis were previously considered distinct.
- Emerging evidence suggests convergence through shared molecular components, enabling cells to overcome pathogen or tumor immune evasion.
- A unified mechanistic framework for PANoptosis, integrating these pathways, has been lacking.
Purpose of the Study:
- To present a novel, sensor-specific framework for PANoptosis.
- To dissect PANoptosome architecture and the roles of innate immune sensors (ZBP1, RIPK1, AIM2, NLRP12).
- To analyze cross-pathway interactions and the adaptable logic of PANoptosis in immune activation and cell fate.
Main Methods:
- Review of existing literature on pyroptosis, apoptosis, and necroptosis.
- Analysis of innate immune sensor functions in PANoptosome assembly.
- Integration of signaling pathways involving caspase-8, RIP kinases, and gasdermins.
Main Results:
- PANoptosis unifies distinct inflammatory cell death pathways through PANoptosomes.
- Distinct innate immune sensors act as hubs for context-dependent inflammatory cell death.
- PANoptosis functions as an adaptable logic circuit regulating immune responses and cell fate.
Conclusions:
- PANoptosis plays dual roles in disease, offering protection in infection/cancer but contributing to pathology in cytokine storms and neurodegeneration.
- Understanding sensor-specific PANoptotic signaling provides precise therapeutic entry points.
- PANoptosis is a master regulator of inflammatory cell death and a key target for immune interventions.
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