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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
Clearance of apoptotic cells: implications in health and disease
Michael R Elliott1, Kodi S Ravichandran
1Center for Cell Clearance and the Department of Microbiology, University of Virginia, Charlottesville, VA 22908, USA.
Abstract:
Recent advances in defining the molecular signaling pathways that regulate the phagocytosis of apoptotic cells have improved our understanding of this complex and evolutionarily conserved process. Studies in mice and humans suggest that the prompt removal of dying cells is crucial for immune tolerance and tissue homeostasis. Failed or defective clearance has emerged as an important contributing factor to a range of disease processes. This review addresses how specific molecular alterations of engulfment pathways are linked to pathogenic states. A better understanding of the apoptotic cell clearance process in healthy and diseased states could offer new therapeutic strategies.
Insights
Efficient removal of dying cells via phagocytosis is vital for immune tolerance and tissue health. Molecular defects in this process contribute to diseases, offering potential therapeutic targets.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Phagocytosis of apoptotic cells is a conserved biological process essential for maintaining tissue homeostasis and immune tolerance.
- Defects in the clearance of dying cells are implicated in the pathogenesis of various diseases.
Purpose of the Study:
- To review the molecular signaling pathways regulating apoptotic cell phagocytosis.
- To elucidate the link between alterations in engulfment pathways and disease states.
- To explore potential therapeutic strategies based on understanding apoptotic cell clearance.
Main Methods:
- Literature review of recent advances in phagocytosis research.
- Analysis of studies in mice and humans.
- Integration of data on molecular signaling pathways and disease pathogenesis.
Main Results:
- Advances in defining molecular pathways governing phagocytosis have enhanced understanding of this process.
- Prompt removal of apoptotic cells is critical for immune tolerance and tissue homeostasis.
- Failed or defective clearance is a significant factor in disease development.
Conclusions:
- Understanding the molecular mechanisms of apoptotic cell clearance is crucial for both healthy and diseased states.
- Identifying specific molecular alterations in engulfment pathways can illuminate disease links.
- Targeting apoptotic cell clearance pathways may offer novel therapeutic avenues for various diseases.
Related Concept Videos
Apoptosis
Phagocytosis of Apoptotic Cells
Normal cells contain receptors that prevent them from being recognized by phagocytes.
The Extrinsic Apoptotic Pathway
Cellular Injury V: Apoptosis and Autophagy
The Intrinsic Apoptotic Pathway
Overview of Cell Death
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...

