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Updated: Mar 29, 2026
Techniques for the Analysis of Extracellular Vesicles Using Flow Cytometry
Published on: March 17, 2015
Tips and tricks for flow cytometry-based analysis and counting of microparticles
Philippe Poncelet1, Stéphane Robert2, Nicolas Bailly3
1Research & Technology Department, BioCytex, Marseille, France.
Abstract:
Submicron-sized extra-cellular vesicles generated by budding from the external cell membranes, microparticles (MPs) are important actors in transfusion as well as in other medical specialties. After briefly positioning their role in the characterization of labile blood products, this technically oriented chapter aims to review practical points that need to be considered when trying to use flow cytometry for the analysis, characterization and absolute counting of MP subsets. Subjects of active discussions relative to instrumentation will include the choice of the trigger parameter, possible standardization approaches requiring instrument quality-control, origin and control of non-specific background and of coincidence artifacts, choice of the type of electronic signals, optimal sheath fluid and sample speed. Questions related to reagents will cover target antigens and receptors, multi-color reagents, negative controls, enumeration of MPs and limiting artifacts due to unexpected (micro-) coagulation of plasma samples. Newly detected problems are generating innovative solutions and flow cytometry will continue to remain the technology of choice for the analysis of MPs, in the domain of transfusion as well as in many diverse specialties.
Insights
Flow cytometry is crucial for analyzing microparticles (MPs), which are vital in blood products and medical specialties. This review details practical flow cytometry methods for accurate MP characterization and counting.
Area of Science:
- Biotechnology
- Hematology
- Analytical Chemistry
Background:
- Microparticles (MPs) are submicron extracellular vesicles crucial in transfusion medicine and other specialties.
- Accurate characterization of MPs is essential for understanding their role in various biological processes.
Purpose of the Study:
- To review practical considerations for using flow cytometry in the analysis, characterization, and absolute counting of MP subsets.
- To address key instrumentation and reagent challenges in MP flow cytometry.
Main Methods:
- Discussion of instrumentation parameters: trigger selection, standardization, quality control, background noise, coincidence artifacts, signal processing, sheath fluid, and sample speed.
- Review of reagent considerations: target antigens, multi-color panels, negative controls, MP enumeration, and artifact mitigation (e.g., micro-coagulation).
Main Results:
- Identifies critical technical aspects for reliable MP analysis using flow cytometry.
- Highlights challenges and solutions for accurate MP subset quantification and characterization.
Conclusions:
- Flow cytometry is the preferred technology for MP analysis in transfusion and other medical fields.
- Ongoing innovations address emerging challenges, ensuring continued advancement in MP research and application.
