Synthetic symmetry breaking and programmable multicellular structure formation.

Area of Science:

• Developmental Biology
• Synthetic Biology
• Biotechnology

Background:

• Cellular development involves symmetry breaking into distinct subpopulations that self-organize into complex structures.
• Existing tools lack control and coupling for recapitulating these developmental processes.
• Controllable symmetry breaking is crucial for engineering complex tissues and organoids.

Purpose of the Study:

• To engineer a novel genetic switch for programmable symmetry breaking in cells.
• To control cell fate commitment probabilities and downstream morphological self-organization.
• To investigate the relationship between cell-cell adhesion and emergent 3D morphologies.

Main Methods:

• Engineered a stochastic recombinase genetic switch tunable by small molecules.
• Utilized small molecule inducers to control commitment probabilities and subpopulation ratios.
• Manipulated cell-cell adhesion properties of differentiated cell fates.
• Developed a computational model to analyze experimental results and morphology formation.

Main Results:

• Achieved programmable symmetry breaking, controlling cell fate commitment and subpopulation ratios.
• Generated diverse 3D morphologies from a monoclonal cell population by tuning cell adhesion.
• Computational modeling showed high concordance with experimental data, revealing insights into adhesion-morphology relationships.

Conclusions:

• The engineered genetic switch enables precise control over cell fate and self-organization.
• This programmable system facilitates the generation of complex 3D structures for tissue engineering.
• The tool provides a foundation for advanced organoid engineering and developmental biology studies.