A rationally designed optochemogenetic switch for activating canonical Wnt signaling.

Area of Science:

• Developmental Biology
• Molecular Biology
• Biotechnology

Background:

• Accurate spatiotemporal control of multicellular self-organization is crucial for embryonic development.
• Wnt signaling is an evolutionarily conserved pathway essential for establishing the anteroposterior axis.
• Existing methods lack precise control and are prone to signal leakage.

Purpose of the Study:

• To develop a genetically encoded optochemogenetic switch for precise Wnt signaling modulation.
• To create a dual-triggered system with an AND-gated logic for enhanced signal specificity.
• To improve the signal-to-noise ratio (SNR) for Wnt pathway activation.

Main Methods:

• Coupling blue light-inducible CRY2olig with rapamycin-inducible LRP6c clustering to create optochemoWnt.
• Utilizing AND-gated logic for dual-triggered Wnt pathway activation.
• Assessing Wnt signaling modulation and SNR under various conditions.

Main Results:

• OptochemoWnt successfully modulated Wnt signaling with AND-gated patterns.
• The system demonstrated an improved signal-to-noise ratio (SNR).
• The dual-trigger design prevented signal leakage from ambient light.

Conclusions:

• OptochemoWnt provides precise spatiotemporal control over Wnt signaling.
• This tool expands the molecular toolbox for developmental biology and tissue engineering.
• The AND-gated strategy has potential applications in other biomedical fields requiring Boolean logic integration.