Micropatterned DNA Hydrogels for Spatiotemporal Programming of Chemical Reaction Networks

Area of Science:

• Biomimetic systems
• Synthetic biology
• Materials science

Background:

• Cells use spatial organization for robust, long-distance communication.
• Artificial systems aim to mimic cellular communication through controlled spatial arrangement.
• Precisely positioning artificial cellular agents for communication studies is challenging.

Purpose of the Study:

• To demonstrate programmable communication between artificial cell-like units using DNA networks.
• To investigate how spatial arrangement influences communication and collective behavior in artificial systems.
• To develop a versatile platform for exploring arrangement-governed communication.

Main Methods:

• Fabrication of DNA-functionalized hydrogel posts as artificial cellular units via microscale 3D printing.
• Implementation of DNA-based chemical reaction networks to program communication and collective behavior.
• Introduction of negative feedback loops for complex spatiotemporal dynamics.

Main Results:

• Artificial cellular units exhibited position-unique transient activation patterns in response to DNA stimuli.
• Spatially separated posts demonstrated biased activation through catalytic signal amplification.
• Complex spatiotemporal dynamics were achieved, demonstrating arrangement-influenced collective behavior.

Conclusions:

• Spatial arrangement can be used to program and tune communication in artificial cellular systems.
• DNA-based reaction networks provide a flexible method for designing artificial communication.
• The developed platform offers insights into collective chemical intelligence and biomimetic system design.