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In Situ Investigation of Intercellular Signal Transduction Based on Detection of Extracellular pH and ROS by Scanning
1School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China.
Analytical Chemistry
|May 3, 2023
Summary
This study reveals how cells communicate using scanning electrochemical microscopy. It shows that hydrogen ions (H+) act as signaling molecules, prompting cells to release reactive oxygen species (ROS).
Area of Science:
- Cell Biology
- Biophysics
- Analytical Chemistry
Background:
- Intercellular signal transduction is crucial for biological regulation.
- Investigating cell-to-cell communication requires advanced in situ monitoring techniques.
Purpose of the Study:
- To develop and utilize a novel device for real-time analysis of intercellular signal transduction.
- To identify signaling molecules involved in cell communication and their mechanisms.
Main Methods:
- A Transwell chamber-based two-layer cell culture device was employed.
- Scanning electrochemical microscopy (SECM) was used for in situ monitoring of extracellular pH (pHe) and reactive oxygen species (ROS).
- Electrical stimulation was applied to signaling cells (MCF-7, HeLa, HFF) to observe effects on signal-receiving cells.
Main Results:
- Electrical stimulation of signaling cells promoted ROS release in signal-receiving cells.
- Increased H+ concentration and proximity of cell layers correlated with enhanced ROS release.
- This suggests H+ acts as a key signaling molecule in intercellular communication.
Conclusions:
- A SECM-based strategy enables effective in situ investigation of intercellular signal transduction.
- Hydrogen ions (H+) are identified as signaling molecules mediating intercellular communication.
- The study provides insights into the mechanisms underlying cell-to-cell signaling.
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