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Microscopy-Based Tracking and Quantification Methods to Study Phagosome Resolution
Charlene E Lancaster1,2, Serene Moussaoui1,2, Maria Cecilia Gimenez1
1Department of Biological Sciences, University of Toronto at Scarborough, Toronto, ON, Canada.
Methods in Molecular Biology (Clifton, N.J.)
|June 26, 2023
Summary
Phagosome resolution involves breaking down phagolysosomes into smaller, dynamic vesicles (PDVs). New microscopy methods quantify phagosome shrinkage and PDV accumulation, aiding the study of this crucial cellular process.
Area of Science:
- Cell Biology
- Immunology
- Microscopy
Background:
- Phagocytosis is a key cellular process for immune defense and nutrient uptake.
- Phagosome resolution is a terminal stage where phagolysosomes break down.
- Phagosome-derived vesicles (PDVs) are newly identified, dynamic structures in this process.
Purpose of the Study:
- To define and characterize phagosome resolution.
- To develop methods for analyzing phagosome-derived vesicles (PDVs).
- To quantify phagosome shrinkage and PDV accumulation during phagocytosis.
Main Methods:
- Development of microscopy-based techniques.
- Volumetric analysis of phagosome size reduction.
- Co-occurrence analysis of membrane markers with PDVs.
Main Results:
- Phagolysosomes fragment into heterogeneous, dynamic PDVs.
- PDVs accumulate in macrophages as phagosomes diminish.
- Methods allow differentiation and tracking of PDVs.
Conclusions:
- Phagosome resolution is a complex process involving PDV formation and accumulation.
- Developed methods enable quantitative analysis of phagosome resolution.
- Further research can utilize these methods to understand PDV dynamics and functions.
