Proteomic profiling of paired human liver homogenate and tissue derived extracellular vesicles

Zivile Useckaite, Lauren A. Newman, Ashley M. Hopkins, Sonja Klebe, Alex D. Colella, Nusha Chegeni, Ruth Williams, Michael J. Sorich, David Rodrigues, Tim K. Chataway, Andrew Rowland

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Abstract

Advances in technologies to isolate extracellular vesicles (EVs) and detect/quantify their cargo underpin the novel potential of these circulating particles as a liquid biopsy to understand physiology and disease. One organ of particular interest in terms of utilizing EVs as a liquid biopsy is the liver. The extent to which EVs originating from the liver reflect the functional status of this organ remains unknown. This is an important knowledge gap that underpins the utility of circulating liver derived EVs as a liquid biopsy. The primary objective of this study was to characterize the proteomic profile of EVs isolated from the extracellular space of liver tissue (LEV) and compare this profile to that of paired tissue (LH). LCMS analyses detected 2892 proteins in LEV and 2673 in LH. Of the 2673 proteins detected in LH, 1547 (58%) were also detected in LEV. Bioinformatic analyses demonstrated comparable representation of proteins in terms of biological functions and cellular compartments. Although, enriched representation of membrane proteins and associated functions was observed in LEV, while representation of nuclear proteins and associated functions was depleted in LEV. These data support the potential use of circulating liver derived EVs as a liquid biopsy for this organ.
Original languageEnglish
Article number2300025
Number of pages13
JournalProteomics
Early online date30 Nov 2023
DOIs
Publication statusE-pub ahead of print - 30 Nov 2023

Keywords

  • exosomes
  • extracellular vesicles
  • liver derived EVs
  • proteomics

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