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Cell Co-culture Patterning Using Aqueous Two-phase Systems
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Temporal Stimulus Patterns Drive Differentiation of a Synthetic Dipeptide-Based Coacervate
Ryou Kubota1, Shogo Torigoe1, Itaru Hamachi1,2
1Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo̅-ku, Kyoto 615-8510, Japan.
Journal of the American Chemical Society
|August 9, 2022
Summary
Chemists created smart coacervates that change shape and viscosity in response to specific light pulse patterns. This breakthrough advances the design of responsive materials and artificial chemical cells.
Area of Science:
- Supramolecular chemistry
- Materials science
- Chemical biology
Background:
- Living cells process temporal information for survival, but synthetic systems struggle to decode dynamic stimuli.
- Artificial systems lack sophisticated reaction networks for signal transduction comparable to biological systems.
Purpose of the Study:
- To develop synthetic coacervates capable of decoding temporally distinct light pulse patterns.
- To engineer stimulus-responsive materials with switch-like behavior.
Main Methods:
- Designed cationic diphenylalanine peptide derivatives for coacervate formation.
- Utilized coacervates to concentrate monomers and photoinitiators for light-triggered polymerization.
- Investigated the effect of different light pulse frequencies (9.0 Hz vs. 0.5 Hz) on polymerization.
Main Results:
- Coacervates exhibited pattern-dependent anionic polymer formation, sensitive to light pulse frequency.
- Polymerization occurred preferentially at 9.0 Hz, attributed to radical intermediate competition.
- Morphological differentiation and altered internal viscosity were observed in response to temporal patterns.
Conclusions:
- Demonstrated a novel method for creating dynamic, pattern-responsive synthetic materials.
- Highlighted the potential of coacervates as platforms for sophisticated chemical cells.
- Provided insights for designing smart supramolecular soft materials.
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