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Related Experiment Video

Updated: May 31, 2025

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Filter-Aided Extracellular Vesicle Enrichment (FAEVEr) for Proteomics.

Jarne Pauwels1, Tessa Van de Steene1, Jana Van de Velde1

  • 1VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium; Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.

Molecular & Cellular Proteomics : MCP
|January 22, 2025
PubMed
Summary

A new filter-aided extracellular vesicle enrichment (FAEVEr) method efficiently isolates extracellular vesicles (EVs) from complex samples. This technique enables robust proteome analysis by removing interfering proteins, advancing biomarker discovery and drug delivery applications.

Keywords:
300 kDa MWCO ultrafiltrationEV-depleted serumLC-MS/MSTween-20conditioned mediumextracellular vesiclesproteomicsstarvation

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Nanotechnology

Background:

  • Extracellular vesicles (EVs) are crucial in cellular communication and disease, presenting potential as biomarkers and drug delivery vehicles.
  • Analyzing EV proteomes is challenging due to low protein abundance and interference from complex biological matrices.
  • Existing isolation methods like ultracentrifugation and size-exclusion chromatography have limitations.

Purpose of the Study:

  • To introduce and validate a novel filter-aided extracellular vesicle enrichment (FAEVEr) method.
  • To demonstrate FAEVEr's efficiency in isolating EVs and enabling proteome analysis.
  • To assess FAEVEr's performance across various biological samples.

Main Methods:

  • Developed FAEVEr using 300 kDa molecular weight cutoff filtration for parallel sample processing.
  • Employed Tween-20 detergent washes to remove non-EV proteins from retained EVs.
  • Performed direct lysis on-filter for complete recovery of EV protein cargo for proteome analysis.
  • Validated FAEVEr on recombinant EVs, conditioned medium, bovine serum, human plasma, and urine.

Main Results:

  • FAEVEr quantitatively retains EV particles on filters.
  • Extensive washing effectively removes interfering non-EV proteins.
  • Direct lysis on-filter ensures complete recovery of EV protein cargo.
  • FAEVEr demonstrated effectiveness across diverse biological matrices.
  • EV proteomes differ significantly based on cellular conditions, such as nutrient deprivation.

Conclusions:

  • FAEVEr is an efficient, cost-effective, and time-saving method for EV isolation and proteome analysis.
  • This method overcomes challenges associated with low EV abundance and complex sample matrices.
  • FAEVEr facilitates deeper insights into EV biology, biomarker discovery, and therapeutic applications.