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Updated: Sep 19, 2025

Scalable Isolation and Purification of Extracellular Vesicles from Escherichia coli and Other Bacteria
09:56

Scalable Isolation and Purification of Extracellular Vesicles from Escherichia coli and Other Bacteria

Published on: October 13, 2021

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Bacterial proteins encapsulate in extracellular membrane vesicles from Escherichia coli-infected macrophages

Risa Imamiya1, Akinori Ninomiya2, Hiroko Kato3

  • 1Food Hygiene and Environmental Health, Faculty of Life and Environmental Science, Kyoto Prefectural University, Kyoto, Japan.

Microbiology Resource Announcements
|June 9, 2025
PubMed

Insights

Extracellular vesicles (EVs) from macrophages infected with Escherichia coli contain bacterial proteins. These findings suggest EVs may play a role in inflammatory diseases linked to E. coli infection.

Area of Science:

  • Immunology
  • Microbiology
  • Cell Biology

Background:

  • Extracellular vesicles (EVs) are implicated as inflammatory factors in various diseases.
  • Macrophage-EVs may contribute to inflammatory responses during infections.

Purpose of the Study:

  • To investigate the presence of Escherichia coli-derived proteins within macrophage-derived EVs.
  • To compare protein content in EVs from macrophages exposed to live versus inactivated E. coli.

Main Methods:

  • Macrophage infection with live and heat-inactivated Escherichia coli.
  • Proteomic analysis of extracellular vesicles isolated from infected macrophages.

Main Results:

  • Sixty-three proteins originating from live E. coli were identified in macrophage-derived EVs.
  • Analysis revealed bacterial protein content in EVs following E. coli infection.

Conclusions:

  • Macrophage-derived EVs can carry bacterial components after E. coli infection.
  • These findings highlight a potential mechanism for EV-mediated inflammation in E. coli-related diseases.
Keywords:
Escherichia coliexosomesextracellular vesiclesmacrophageouter membrane proteins

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