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Glyco Star Polymers as Helical Multivalent Host and Biofunctional Nano-Platform
Tomoki Nishimura1,2, Sada-Atsu Mukai1,2, Shin-Ichi Sawada1,2
1Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8150, Japan.
ACS Macro Letters
|May 21, 2022
Summary
New amylose-based star polymers were synthesized using click chemistry and enzymatic polymerization. These novel glyco biomaterials form hydrogels and host hydrophobic molecules, showing potential in advanced biomaterial applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Glycobiology
Background:
- Amylose, a natural polysaccharide, offers biocompatibility and biodegradability.
- Star polymers present unique architectures for advanced material design.
- Glyco biomaterials are increasingly important in biomedical applications.
Purpose of the Study:
- To synthesize novel amylose-based star polymers with varying arm numbers.
- To investigate the properties and potential applications of these star polymers.
- To explore their utility as hosts for hydrophobic molecules and as nucleic acid chaperones.
Main Methods:
- Synthesis via click reaction and enzymatic polymerization using phosphorylase.
- Control of molecular weights through enzymatic reaction parameters.
- Characterization of polymer structure, viscosity, and hydrogel formation.
Main Results:
- Successfully synthesized amylose-based star polymers with 1, 2, 4, and 8 arms.
- Achieved controlled molecular weights and observed hydrogel formation for 8-arm polymers.
- Demonstrated allosteric multivalent host behavior for hydrophobic molecules via helical formation.
- Showcased catalytic activity in DNA strand exchange by a cationic 8-arm star polymer.
Conclusions:
- Amylose-based star polymers represent a versatile new class of glyco biomaterials.
- The multi-arm architecture enables unique properties like hydrogel formation and molecular hosting.
- These polymers show promise as building blocks for advanced hybrid biomaterials and as nucleic acid chaperones.
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