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Related Concept Videos

iChip01:24

iChip

The cultivation of environmental microorganisms has long been hindered by the inability to replicate complex native conditions in vitro. The isolation chip (iChip) addresses this limitation by facilitating the growth of previously uncultivable microorganisms through in situ incubation. Designed for high-throughput microbial cultivation, the iChip comprises hundreds of microchambers, each capable of housing a single microbial cell. These microchambers are loaded with a mixture of molten agar and...

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On-Chip Profiling of Bacterially Infected Host Cell-Derived Small Extracellular Vesicles by Surface-Enhanced Raman

Nana Lyu1, Amin Hassanzadeh-Barforoushi1, Wei Zhang1

  • 1School of Natural Sciences, Macquarie University, Sydney, NSW 2109, Australia.

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|December 30, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a microfluidic platform to analyze small extracellular vesicles (sEVs) from lung cells during bacterial infection. It reveals how Pseudomonas aeruginosa alters sEV molecular signatures, impacting lung cancer progression.

Keywords:
bacterial infectionmicrofluidicmultiplexed detectionsmall extracellular vesicles (sEVs)surface-enhanced Raman scattering (SERS)

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Microfluidics

Background:

  • Small extracellular vesicles (sEVs) are nanoparticles in bodily fluids, reflecting parent cell status.
  • Bacterial infections, like Pseudomonas aeruginosa, can exacerbate lung cancer by altering sEVs.
  • Current methods for profiling host sEVs during infection are limited.

Purpose of the Study:

  • To develop an integrated microfluidic platform for analyzing host-derived sEVs during bacterial infection.
  • To profile molecular changes in sEVs from lung epithelial cells infected with Pseudomonas aeruginosa.
  • To mimic physiological host-pathogen interactions for sEV analysis.

Main Methods:

  • An integrated microfluidic platform combining host-pathogen coculture with on-chip sEV capture.
  • Utilizing a two-layer modular design for controlled coculture and sEV capture via hydrophobic interactions.
  • Employing multiplexed surface-enhanced Raman scattering (SERS) nanotags for simultaneous detection of sEV and bacterial biomarkers.

Main Results:

  • Successful on-chip capture and multiplexed molecular profiling of sEVs from infected A549 lung cells.
  • SERS mapping revealed spatial resolution of molecular signatures, indicating sEV compositional changes post-PAO1 exposure.
  • The platform design minimizes direct bacterial contact, better simulating in vivo infection dynamics.

Conclusions:

  • The developed microfluidic platform enables detailed analysis of host sEVs during bacterial infections.
  • This technology provides insights into how bacterial pathogens alter sEV composition, potentially influencing lung cancer.
  • The system offers a novel tool for studying host-pathogen interactions and their impact on sEVs.