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- W2915297581 endingPage "e0007191" @default.
- W2915297581 startingPage "e0007191" @default.
- W2915297581 abstract "Background Robust protocols for the isolation of extracellular vesicles (EVs) from the rest of their excretory-secretory products are necessary for downstream studies and application development. The most widely used purification method of EVs for helminth pathogens is currently differential centrifugation (DC). In contrast, size exclusion chromatography (SEC) has been included in the purification pipeline for EVs from other pathogens, highlighting there is not an agreed research community ‘gold standard’ for EV isolation. In this case study, Fasciola hepatica from natural populations were cultured in order to collect EVs from culture media and evaluate a SEC or DC approach to pathogen helminth EV purification. Methodology/Principal findings Transmission electron and atomic force microscopy demonstrated that EVs prepared by SEC were both smaller in size and less diverse than EV resolved by DC. Protein quantification and Western blotting further demonstrated that SEC purification realised a higher EV purity to free excretory-secretory protein (ESP) yield ratio compared to DC approaches as evident by the reduction of soluble free cathepsin L proteases in SEC EV preparations. Proteomic analysis further highlighted DC contamination from ESP as shown by an increased diversity of protein identifications and unique peptide hits in DC EVs as compared to SEC EVs. In addition, SEC purified EVs contained less tegumental based proteins than DC purified EVs. Conclusions/Significance The data suggests that DC and SEC purification methods do not isolate equivalent EV population profiles and caution should be taken in the choice of EV purification utilised, with certain protocols for DC preparations including more free ES proteins and tegumental artefacts. We propose that SEC methods should be used for EV purification prior to downstream studies." @default.
- W2915297581 created "2019-03-02" @default.
- W2915297581 creator A5000794908 @default.
- W2915297581 creator A5004215500 @default.
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- W2915297581 creator A5043207237 @default.
- W2915297581 creator A5053816118 @default.
- W2915297581 creator A5065809831 @default.
- W2915297581 creator A5081427867 @default.
- W2915297581 date "2019-02-27" @default.
- W2915297581 modified "2023-10-16" @default.
- W2915297581 title "The importance of extracellular vesicle purification for downstream analysis: A comparison of differential centrifugation and size exclusion chromatography for helminth pathogens" @default.
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- W2915297581 doi "https://doi.org/10.1371/journal.pntd.0007191" @default.
- W2915297581 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6411213" @default.
- W2915297581 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30811394" @default.
- W2915297581 hasPublicationYear "2019" @default.
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