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Antibody-Free Labeling of Malaria-Derived Extracellular Vesicles Using Flow Cytometry

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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… Click to show full 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.

Keywords: extracellular vesicles; antibody free; malaria derived; labeling malaria; free labeling; derived extracellular

Journal Title: Biomedicines
Year Published: 2020

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