Abstract
Abstract
We developed a novel asymmetric depth filtration (DF) approach to isolate extracellular vesicles (EVs) from biological fluids that outperforms ultracentrifugation and size‐exclusion chromatography in purity and yield of isolated EVs. By these metrics, a single‐step DF matches or exceeds the performance of multistep protocols with dedicated purification procedures in the isolation of plasma EVs. We demonstrate the selective transit and capture of biological nanoparticles in asymmetric pores by size and elasticity, low surface binding to the filtration medium, and the ability to cleanse EVs held by the filter before their recovery with the reversed flow all contribute to the achieved purity and yield of preparations. We further demonstrate the method's versatility by applying it to isolate EVs from different biofluids (plasma, urine, and cell culture growth medium). The DF workflow is simple, fast, and inexpensive. Only standard laboratory equipment is required for its implementation, making DF suitable for low‐resource and point‐of‐use locations. The method may be used for EV isolation from small biological samples in diagnostic and treatment guidance applications. It can also be scaled up to harvest therapeutic EVs from large volumes of cell culture medium.
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References
98
[11]
A comparison of methods for the isolation and separation of extracellular vesicles from protein and lipid particles in human serum

K. Brennan, K. Martin, S. P. FitzGerald et al.

Scientific Reports 10.1038/s41598-020-57497-7
[19]
Size and shape characterization of hydrated and desiccated exosomes

Vasiliy S. Chernyshev, Rakesh Rachamadugu, Yen Hsun Tseng et al.

Analytical and Bioanalytical Chemistry 10.1007/s00216-015-8535-3
[22]
Darby J. L. "Depth filtration of wastewater: Particle size and ripening" Research Journal of the Water Pollution Control Federation (1991)
[23]
Datta S. "Gradient clogging in depth filtration" Physical Review A, Atomic, Molecular, and Optical Physics (1998)
[33]
He L. "A highly efficient method for isolating urinary exosomes" International Journal of Molecular Medicine (2019)
[36]
Jung H. H. Kim J.‐Y. Lim J. E. &Im Y.‐H.(2020).Cytokine profiling in serum‐derived exosomes isolated by different methods.Science Reports.https://doi.org/10.1038/s41598‐020‐70584‐z 10.1038/s41598-020-70584-z
[38]
Keshelava V. Zemskova M. &Sorokin K.(2019).Method and device for separating extracellular vesicles from biological liquids with the aid of cascade ultrafiltration WO2019132688A1.
[47]
Lim C. Z. J. "Subtyping of circulating exosome‐bound amyloid β reflects brain plaque deposition" Nature Communication (2019)
[48]
Isolation of exosomes by differential centrifugation: Theoretical analysis of a commonly used protocol

Mikhail A. Livshits, Elena Khomyakova, Evgeniy G. Evtushenko et al.

Scientific Reports 10.1038/srep17319
[49]
Optimized exosome isolation protocol for cell culture supernatant and human plasma

Richard J. Lobb, Melanie Becker, Shu Wen Wen et al.

Journal of Extracellular Vesicles 10.3402/jev.v4.27031

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Published
Aug 01, 2022
Vol/Issue
11(8)
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Vasiliy S. Chernyshev, Roman N. Chuprov‐Netochin, Ekaterina Tsydenzhapova, et al. (2022). Asymmetric depth‐filtration: A versatile and scalable method for high‐yield isolation of extracellular vesicles with low contamination. Journal of Extracellular Vesicles, 11(8). https://doi.org/10.1002/jev2.12256