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Updated: May 12, 2025

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Microfluidic Platform for Real-Time Impedance Profiling of Transwell-Based Barrier Models.

Amber Bultena1, Amanzhol Kurmashev1, Julia A Boos1

  • 1Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland.

Proceedings of IEEE Sensors. IEEE International Conference on Sensors
|May 9, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a microfluidic device for real-time monitoring of tissue barrier integrity. The platform enables continuous, non-invasive assessment of barrier models under dynamic flow conditions.

Keywords:
barrier modelimpedance spectroscopytransepithelial electrical resistance (TEER)transwell inserts

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Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Microfluidics

Background:

  • Conventional methods for assessing tissue barrier integrity are often invasive or provide only single time-point data.
  • There is a need for continuous, non-invasive monitoring techniques to better understand dynamic barrier function.
  • Transwell-based barrier models are widely used but have limitations in real-time assessment.

Purpose of the Study:

  • To develop and validate a microfluidic platform for real-time impedance profiling of transwell-based barrier models.
  • To enable continuous, non-invasive monitoring of tissue barrier integrity with high spatial and temporal resolution.
  • To overcome the limitations of traditional invasive permeability assays and single time-point impedance measurements.

Main Methods:

  • Integration of microfabricated electrodes within a microfluidic device.
  • Real-time impedance profiling of transwell-based barrier models.
  • Application of dynamic microfluidic flow conditions.
  • Monitoring of upper-airway-tissue models under non-physiological liquid-liquid interface conditions.

Main Results:

  • The platform successfully enabled continuous, non-invasive monitoring of barrier integrity.
  • High spatial and temporal resolution was achieved in assessing barrier function.
  • The gradual loss of barrier integrity in upper-airway-tissue models was continuously monitored.
  • The system demonstrated its capability in detecting changes under dynamic flow and interface conditions.

Conclusions:

  • The proposed microfluidic platform offers a novel solution for real-time assessment of tissue barrier models.
  • This technology overcomes key limitations of conventional methods, providing enhanced insights into barrier dynamics.
  • The system is suitable for studying tissue barrier integrity under various physiological and non-physiological conditions, particularly in airway research.