Related Experiment Video
Updated: Nov 15, 2025
09:39
Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
Published on: February 7, 2021
8.4K
Nanoparticle-Hydrogel Composite Drug Delivery System for Potential Ocular Applications
Xuan-Ling Hsu1, Lien-Chen Wu2,3, Jui-Yang Hsieh1
1Department of Biomedical Engineering, National Taiwan University, Taipei 10051, Taiwan.
Polymers
|March 6, 2021
Summary
This study introduces a novel composite drug delivery system (DDS) using nanoparticles and hydrogels to reduce frequent intravitreal injections for eye diseases like wet age-related macular degeneration (wet AMD). The DDS offers sustained drug release and improved bioavailability for better ocular treatment.
Area of Science:
- Biomaterials Science
- Ophthalmology
- Drug Delivery Systems
Background:
- Intravitreal injections are standard for posterior eye diseases like wet age-related macular degeneration (wet AMD).
- Frequent injections of anti-vascular endothelial growth factor (anti-VEGF) drugs can cause complications.
- Reducing injection frequency is crucial for improving patient outcomes and treatment adherence.
Purpose of the Study:
- To design and characterize a composite drug delivery system (DDS) for sustained protein drug release.
- To evaluate the DDS's potential to reduce dosing frequency for ocular neovascular diseases.
- To enhance drug bioavailability through nanoparticulate formulation within the DDS.
Main Methods:
- Fabrication of drug-loaded poly(lactide-co-glycolide) (PLGA) nanoparticles.
- Incorporation of nanoparticles into a chemically crosslinked hyaluronan hydrogel.
- Characterization of nanoparticle properties (morphology, size, composition, drug loading).
- Assessment of hydrogel and composite DDS swelling, degradation, and controlled release using bovine serum albumin (BSA) as a model drug.
Main Results:
- The composite DDS demonstrated structural integrity, retaining 75% of its wet weight.
- Sustained release of BSA at 0.4 μg/day for over two months under physiological conditions.
- Nanoparticulate formulation enhanced drug bioavailability by facilitating deep retinal layer penetration.
Conclusions:
- The developed composite DDS utilizes biocompatible materials and is easily prepared.
- This system shows significant promise for sustained protein drug delivery in treating ocular neovascular diseases.
- The DDS offers a potential strategy to reduce injection frequency and improve therapeutic outcomes for conditions like wet AMD.
