Urinary nanovesicles captured by lectins or antibodies demonstrate variations in size and surface glycosylation profile

Nanomedicine
Jared Q GerlachMatthew D Griffin

Abstract

The use of carbohydrate-binding proteins (lectins) to isolate urinary extracellular vesicles (uEVs) was investigated and the captured subpopulations were characterized. Pooled uEVs from multiple healthy donors were exposed to lectin-conjugated or antibody-conjugated beads. Recovered uEVs were evaluated by protein estimation, transmission electron microscopy, nanoparticle tracking analysis and lectin microarray profiling. uEVs isolated by lectin- and antibody-based affinity capture exhibited distinct variations in size and surface content. Transmission electron microscopy confirmed similar EV diameters to those established by nanoparticle tracking analysis, but total particle counts did not correlate closely with protein-based quantification. Lectin microarray profiling demonstrated capture-dependent differences in surface glycosylation. Selective, carbohydrate-mediated EV isolation by lectin affinity approaches may prove immediately useful for research and find eventual use in clinical applications.

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Citations

Mar 15, 2018·Journal of Extracellular Vesicles·Charles WilliamsJuan M Falcon-Perez
Oct 30, 2018·Science and Technology of Advanced Materials·Ciarán Manus MaguireAdriele Prina-Mello
Jun 27, 2019·Journal of Extracellular Vesicles·Daniela FreitasCelso A Reis
Jan 24, 2020·Expert Review of Proteomics·Hanjie YuZheng Li
Jun 12, 2018·Analytical Chemistry·Júlia CostaHarald S Conradt

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Methods Mentioned

BETA
flow cytometry
transmission electron microscopy
affinity capture
glycosylation
protein assay

Software Mentioned

Excel
Hierarchical Clustering Explorer
NTA

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