Journal
JOURNAL OF EXTRACELLULAR VESICLES
Volume 4, Issue -, Pages -Publisher
TAYLOR & FRANCIS LTD
DOI: 10.3402/jev.v4.29509
Keywords
extracellular vesicles; blood plasma; cryo-electron microscopy; immuno-gold electron microscopy; flow cytometry; vesicle aggregation; centrifugation
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Funding
- ANR grant [11-BSV1-03501-PlacentA5]
- Canceropole-GSO grant [2013-E07]
- IUF grant
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Plasma and other body fluids contain cell-derived extracellular vesicles (EVs), which participate in physiopathological processes and have potential biomedical applications. In order to isolate, concentrate and purify EVs, high-speed centrifugation is often used. We show here, using electron microscopy, receptor-specific gold labelling and flow cytometry, that high-speed centrifugation induces the formation of EV aggregates composed of a mixture of EVs of various phenotypes and morphologies. The presence of aggregates made of EVs of different phenotypes may lead to erroneous interpretation concerning the existence of EVs harbouring surface antigens from different cell origins.
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