Rapid Optimization of a Light-Inducible System to Control Mammalian Gene Expression

Area of Science:

• Biotechnology
• Molecular Biology
• Synthetic Biology

Background:

• Current inducible gene expression systems face limitations including high cost, irreversibility, and off-target effects.
• Optogenetic systems offer light-controlled gene regulation, providing a switch-like mechanism for precise control.
• Developing advanced optogenetic tools is crucial for expanding applications in human health and biotechnology.

Purpose of the Study:

• To optimize a simplified light-activated CRISPR effector (2pLACE) system for tunable and reversible mammalian gene expression.
• To develop and utilize the OptoPlate-96 platform for high-throughput screening and optimization of the 2pLACE system.
• To identify optimal component ratios and blue light response curves for the 2pLACE system in HEK293T cells.

Main Methods:

• Optimization of the 2pLACE system using the OptoPlate-96 for high-throughput screening.
• Flow cytometry for single-cell analysis to assess gene expression dynamics.
• Characterization of the blue light intensity response curve and component ratio optimization in HEK293T cells.

Main Results:

• Successful optimization of the 2pLACE system for precise, tunable, and reversible control of mammalian gene expression.
• Identification of optimal component ratios to maximize the dynamic range of the 2pLACE system.
• Determination of the blue light intensity response curve, demonstrating sensitivity to light stimuli.

Conclusions:

• The optimized 2pLACE system with the OptoPlate-96 provides a scalable and adaptable platform for optogenetic gene expression control.
• This workflow enhances the precision and reversibility of gene regulation, benefiting biomanufacturing and biotechnology.
• The developed methods can be adapted for other mammalian cell types, optogenetic systems, and light wavelengths.