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Updated: Dec 23, 2025
Flow Virometry to Analyze Antigenic Spectra of Virions and Extracellular Vesicles
Published on: January 25, 2017
Antibody-Free Labeling of Malaria-Derived Extracellular Vesicles Using Flow Cytometry
Elya Dekel1, Paula Abou Karam1, Yael Ohana-Daniel1
1Faculty of Biochemistry, Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel.
Abstract:
Extracellular vesicles (EVs) are cell-derived membrane-bound structures that are believed to play a major role in intercellular communication by allowing cells to exchange proteins and genetic cargo between them. In particular, pathogens, such as the malaria parasite Plasmodium (P.) falciparum, utilize EVs to promote their growth and to alter their host's response. Thus, better characterization of these secreted organelles will enhance our understanding of the cellular processes that govern EVs' biology and pathological functions. Here we present a method that utilizes a high-end flow cytometer system to characterize small EVs, i.e., with a diameter less than 200 nm. Using this method, we could evaluate different parasite-derived EV populations according to their distinct cargo by using antibody-free labeling. It further allows to closely monitor a sub-population of vesicles carrying parasitic DNA cargo. This ability paves the way to conducting a more 'educated' analysis of the various EV cargo components.
Insights
This study presents a new flow cytometry method to analyze small extracellular vesicles (EVs) from the malaria parasite Plasmodium falciparum. The technique enables detailed characterization of parasite-derived EVs and their DNA cargo.
Area of Science:
- Cell Biology
- Parasitology
- Biotechnology
Background:
- Extracellular vesicles (EVs) mediate intercellular communication by transferring proteins and genetic material.
- Pathogens like Plasmodium falciparum use EVs for growth and host response modulation.
- Understanding EV biology and pathology requires better characterization methods.
Purpose of the Study:
- To present a novel flow cytometry method for characterizing small EVs (<200 nm).
- To evaluate parasite-derived EV populations based on their cargo using antibody-free labeling.
- To enable monitoring of EVs containing parasitic DNA.
Main Methods:
- Utilized a high-end flow cytometer system.
- Applied antibody-free labeling for cargo evaluation.
- Focused on characterizing small extracellular vesicles.
Main Results:
- Successfully evaluated distinct parasite-derived EV populations by cargo.
- Enabled antibody-free labeling for cargo analysis.
- Monitored a sub-population of EVs carrying parasitic DNA.
Conclusions:
- The developed method enhances the understanding of EV biology and pathological functions.
- Facilitates a more informed analysis of EV cargo components.
- Provides a new tool for studying parasite-EV interactions.
