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New biodegradable dextran-based hydrogels for protein delivery: Synthesis and characterization.
Settimio Pacelli1, Patrizia Paolicelli1, Maria Antonietta Casadei1
1Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
Carbohydrate Polymers
|May 3, 2015
Summary
A novel dextran-based hydrogel (DEX-PEG-MA) enhances mechanical properties and controls macromolecule release, offering improved drug delivery potential compared to existing dextran methacrylate (DEX-MA) systems.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Drug Delivery Systems
Background:
- Dextran methacrylate (DEX-MA) hydrogels are used for drug delivery but suffer from fragility.
- Improving mechanical properties and controlled release is crucial for advanced biomaterials.
Purpose of the Study:
- To synthesize and characterize a new dextran derivative, DEX-PEG-MA, for enhanced hydrogel properties.
- To evaluate DEX-PEG-MA hydrogels for mechanical strength, swelling, degradability, and drug release capabilities.
- To compare DEX-PEG-MA with DEX-MA for potential applications in drug delivery.
Main Methods:
- Synthesis of DEX-PEG-MA via grafting polyethylene glycol methacrylate onto dextran.
- Photo-crosslinking of DEX-PEG-MA to form biodegradable hydrogel networks.
- Mechanical testing, swelling studies, degradation analysis, and macromolecule release profiling.
Main Results:
- DEX-PEG-MA hydrogels exhibited improved mechanical properties (hardness, reduced fragility) compared to DEX-MA.
- The inclusion of PEG improved inter-chain interactions.
- DEX-PEG-MA demonstrated tunable swelling and degradation, effectively controlling the release of high molecular weight macromolecules.
- Combined DEX-MA and DEX-PEG-MA showed intermediate release modulation.
Conclusions:
- DEX-PEG-MA hydrogels are promising biodegradable materials for enhanced drug delivery.
- The modified hydrogels are particularly suitable for delivering high molecular weight peptides and macromolecules.
- Further research into mixed dextran derivative systems could offer tailored release profiles.
