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Protocol for optogenetic stimulation of cells under physical confinement
Qinling Yuan1, Alice Amitrano1, Debanik Choudhury1
1Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA; Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, MD 21218, USA.
STAR Protocols
|July 30, 2026
Summary
This study introduces a new optogenetic protocol to control cell signaling in confined spaces. It allows researchers to precisely activate Akt signaling at the cell
Area of Science:
- Cell biology
- Biophysics
- Molecular signaling
Background:
- Optogenetics offers precise control over cellular processes.
- Studying confined cell migration is crucial for understanding development and disease.
- Integrating optogenetics with microfluidics for cell migration studies presents technical hurdles.
Purpose of the Study:
- To develop a protocol for optogenetic activation of PI3K/Akt signaling in confined cells.
- To enable spatiotemporal control of subcellular signaling dynamics during cell migration.
- To facilitate the study of cell migration in microfluidic environments.
Main Methods:
- Optogenetic stimulation techniques.
- Microfluidic device fabrication and operation.
- Confocal microscopy for visualizing cellular events.
- Biochemical assays for signaling pathway analysis.
Main Results:
- Successful optogenetic activation of PI3K/Akt signaling was achieved in confined cells.
- Localized Akt activation at the cell's leading edge was demonstrated.
- The protocol allows for real-time manipulation of signaling dynamics during migration.
Conclusions:
- The developed protocol effectively integrates optogenetics and microfluidics for studying confined cell migration.
- This method provides a powerful tool for dissecting signaling mechanisms governing cell movement.
- Further research can utilize this protocol to explore various cell migration-related phenomena.
