Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/33508
Title: Comparison of extracellular vesicle isolation and storage methods using high-sensitivity flow cytometry
Authors: DEVILLE, Sarah 
Berckmans, Pascale
VAN HOOF, Rebekka 
LAMBRICHTS, Ivo 
Salvati, Anna
Nelissen, Inge
Editors: Chalmers, Jeffrey
Issue Date: 2021
Publisher: PUBLIC LIBRARY SCIENCE
Source: PLOS One, 16 (2) (Art N° e0245835)
Abstract: Extracellular vesicles (EVs) are of interest for a wide variety of biomedical applications. A major limitation for the clinical use of EVs is the lack of standardized methods for the fast and reproducible separation and subsequent detection of EV subpopulations from biofluids, as well as their storage. To advance this application area, fluorescence-based characterization technologies with single-EV resolution, such as high-sensitivity flow cytometry (HS-FCM), are powerful to allow assessment of EV fractionation methods and storage conditions. Furthermore, the use of HS-FCM and fluorescent labeling of EV subsets is expanding due to the potential of high-throughput, multiplex analysis, but requires further method development to enhance the reproducibility of measurements. In this study, we have applied HS-FCM measurements next to standard EV characterization techniques, including nano-particle tracking analysis, to compare the yield and purity of EV fractions obtained from lipo-polysaccharide-stimulated monocytic THP-1 cells by two EV isolation methods, differential centrifugation followed by ultracentrifugation and the exoEasy membrane affinity spin column purification. We observed differences in EV yield and purity. In addition, we have investigated the influence of EV storage at 4˚C or-80˚C for up to one month on the EV concentration and the stability of EV-associated fluorescent labels. The concentration of the in vitro cell derived EV fractions was shown to remain stable under the tested storage conditions , however, the fluorescence intensity of labeled EV stored at 4˚C started to decline within one day.
Keywords: Cell Line;Extracellular Vesicles;Flow Cytometry;Humans;Specimen Handling;Ultracentrifugation
Document URI: http://hdl.handle.net/1942/33508
ISSN: 1932-6203
e-ISSN: 1932-6203
DOI: 10.1371/journal.pone.0245835
ISI #: WOS:000616960200049
Rights: 2021 Deville et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Category: A1
Type: Journal Contribution
Validations: ecoom 2022
Appears in Collections:Research publications

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