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Glucose-responsive hydrogels based on dynamic covalent chemistry and inclusion complexation
Ting Yang1, Ran Ji, Xin-Xing Deng
1Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Polymer Chemistry & Physics of Ministry of Education, Department of Polymer Science & Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. zcli@pku.edu.cn.
Soft Matter
|March 21, 2014
Summary
This study introduces a novel glucose-responsive hydrogel system using dynamic covalent chemistry. The innovative hydrogel offers tunable sugar-responsiveness for potential applications in diabetes treatment.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Drug Delivery Systems
Background:
- Hydrogels are crucial in biomedical applications, but developing stimuli-responsive systems remains a challenge.
- Dynamic covalent chemistry and host-guest interactions offer promising strategies for creating advanced hydrogel materials.
- Existing glucose-responsive systems often require complex synthesis or operate outside physiological conditions.
Purpose of the Study:
- To develop a novel, easily prepared glucose-responsive hydrogel system.
- To investigate the influence of component ratios on hydrogel properties and responsiveness.
- To explore the potential of this system for biomedical and pharmaceutical applications, particularly in diabetes management.
Main Methods:
- Synthesized hydrogels by mixing poly(ethylene oxide)-b-poly vinyl alcohol) (PEO-b-PVA), α-cyclodextrin (α-CD), and phenylboronic acid (PBA)-terminated PEO.
- Utilized dynamic covalent bonds (PVA-PBA) for sugar-responsive crosslinking and inclusion complexation (PEO-α-CD) for stability.
- Characterized hydrogel properties using rheological measurements and evaluated glucose-responsiveness via protein loading/release studies.
Main Results:
- Hydrogels exhibited solid-like behavior and good structural recovery after yielding.
- Gelation time and mechanical properties were significantly influenced by the component ratios.
- Demonstrated tunable glucose-responsiveness, achieving functionality at physiological pH with optimized compositions.
- Protein release studies confirmed the hydrogel's sugar-responsive characteristics.
Conclusions:
- A novel, biocompatible, and easily prepared glucose-responsive hydrogel system was successfully developed.
- The system leverages dynamic covalent chemistry and inclusion complexation for tunable properties.
- This hydrogel platform offers a promising alternative for advanced applications in diabetes treatment and drug delivery.
