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

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.