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Light-Controllable PEG Hydrogel Cross-Linked by Reversibly Photodissociable Dimeric Green Fluorescent Protein
Yen Thi Nguyen1, Hyuck Jin Lee2, Namdoo Kim1
1Department of Chemistry, Kongju National University, Gongju, Chungcheongnam-do 32588, Republic of Korea.
Bioconjugate Chemistry
|May 29, 2025
Summary
This study introduces a novel photoresponsive hydrogel for drug delivery. The material
Area of Science:
- Biomaterials Science
- Drug Delivery Systems
- Polymer Chemistry
Background:
- Hydrogels are extensively researched as drug delivery carriers.
- Controlling drug encapsulation and release kinetics is crucial for therapeutic efficacy.
- Tunable hydrogel properties are needed for targeted and timed drug release.
Purpose of the Study:
- To develop a photoresponsive hydrogel with adjustable mechanical properties for drug delivery.
- To investigate the use of a photodissociable protein as a cross-linking agent.
- To demonstrate optically controlled drug release capabilities.
Main Methods:
- Synthesized a hydrogel using maleimide-functionalized 4-armed polyethylene glycol (4-armed PEG-Mal) and pdDronpa.
- Utilized 500 nm and 400 nm light to switch pdDronpa between monomer and dimer states, altering hydrogel properties.
- Investigated the release of fluorescently labeled insulin from the hydrogel.
Main Results:
- The hydrogel exhibited rapid transitions in physical state and mechanical strength upon light-induced cross-linking changes.
- Demonstrated successful optical control over the hydrogel's properties.
- Achieved controlled release of fluorescently labeled insulin.
Conclusions:
- The developed photoresponsive hydrogel offers tunable mechanical properties for drug delivery.
- Light-induced switching of pdDronpa enables precise control over hydrogel behavior.
- This system shows potential as an effective drug delivery platform.
