Cell-electronic sensing of particle-induced cellular responses

Area of Science:

• Biotechnology
• Cell Biology
• Environmental Science

Background:

• Microparticles, such as air pollutants, can induce cellular responses.
• Accurate and real-time measurement of these responses is crucial for understanding toxicity.
• Existing methods may lack the continuous monitoring capabilities needed for comprehensive analysis.

Purpose of the Study:

• To develop and validate a novel real-time cell-electronic sensing (RT-CES) technique for continuous measurement of microparticle-induced cellular responses.
• To quantitatively assess the cytotoxicity of microparticles on lung cancer cell lines.
• To demonstrate the potential of RT-CES for biomonitoring of environmental particulates.

Main Methods:

• Utilized microelectrode-embedded microwells seeded with lung cancer cell lines (A549, SK-MES-1).
• Employed real-time cell-electronic sensing (RT-CES) to continuously measure impedance changes, correlated with cell index.
• Applied microparticle suspensions (quartz, PM(10) reference materials) and monitored cellular responses over time.

Main Results:

• RT-CES provided quantitative, real-time data on microparticle-induced cytotoxicity, including dose-response curves and IC(50) values.
• SK-MES-1 cells exhibited greater sensitivity to quartz particles compared to A549 cells.
• Observed cellular responses correlated with morphological changes and apoptosis, confirmed by microscopy and flow cytometry.

Conclusions:

• The developed RT-CES technique offers a robust platform for continuous and real-time assessment of microparticle cytotoxicity.
• This method allows for detailed characterization of cell-specific and particulate-specific responses.
• RT-CES shows significant potential for the biomonitoring of airborne particulates and their health impacts.