Blue Light Switchable Cell-Cell Interactions Provide Reversible and Spatiotemporal Control Towards Bottom-Up Tissue...

Area of Science:

• Biotechnology
• Cell Biology
• Synthetic Biology

Background:

• Controlling cell-cell interactions is crucial for understanding cellular processes and tissue engineering.
• Existing methods lack dynamic, reversible control with high spatiotemporal precision.
• Noninvasive and sustainable methods are needed for long-term cell manipulation.

Purpose of the Study:

• To develop a novel optogenetic approach for dynamic and reversible control of cell-cell interactions.
• To enable precise spatiotemporal control over cell-cell adhesion using visible light.
• To provide a flexible platform for bottom-up tissue assembly.

Main Methods:

• Utilized blue light-switchable proteins (CRY2 and CIBN) expressed on cell surfaces.
• Engineered specific heterophilic interactions between cells mediated by light.
• Demonstrated reversible switching of cell-cell interactions in the dark.

Main Results:

• Achieved precise spatial and temporal control of cell-cell interactions using blue light.
• Showcased dynamic, reversible switching of cell adhesion, repeatable over time.
• Demonstrated the suitability of the system for assembling cells into 3D multicellular architectures.
• Confirmed long-term expression and response to low-intensity, non-toxic blue light.

Conclusions:

• The optogenetic approach offers noninvasive, sustainable, and dynamic control over cell-cell interactions.
• This method provides a flexible tool for studying cell-cell communication and building cellular structures.
• Enables new possibilities in tissue engineering and regenerative medicine through precise cell assembly.