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Published on: February 13, 2016
Injectable Macroporous Ferrogel Microbeads with a High Structural Stability for Magnetically Actuated Drug Delivery
Bom Yi Shin1, Bong Geun Cha1, Ji Hoon Jeong1
1School of Chemical Engineering, ‡School of Pharmacy, §Department of Health Sciences and Technology, Samsung Advanced Institute for Health Science & Technology (SAIHST), and ∥Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea.
Injectable macroporous ferrogel microbeads were developed for on-demand drug delivery. These magnetically responsive materials offer enhanced drug loading and controlled release, overcoming limitations of previous large-scale ferrogels.
Area of Science:
- Biomaterials Science
- Drug Delivery Systems
- Nanotechnology
Background:
- Macroporous hydrogels offer improved diffusion and high loading capacity for biomacromolecules.
- Macroporous ferrogels enable on-demand delivery via magnetic stimulation but require surgical implantation due to size.
- An injectable form of macroporous ferrogels has not been previously reported.
Purpose of the Study:
- To develop injectable macroporous ferrogel microbeads for on-demand drug release.
- To enhance mechanical properties and stability of macroporous ferrogels for biomedical applications.
- To enable magnetic-actuated, on-demand delivery of drugs of various sizes.
Main Methods:
- Preparation of alginate microbeads loaded with iron oxide nanoparticles.
- Induction of macropores via solvent exchange and covalent cross-linking of alginate chains.
- Evaluation of mechanical stability, injectability, and drug release characteristics.
Main Results:
- Successfully fabricated injectable macroporous ferrogel microbeads with enhanced mechanical properties.
- Demonstrated good mechanical stability and safe passage through needles.
- Showcased increased loading of large biomolecules and magnetically controlled volumetric deformation for on-demand release.
Conclusions:
- Injectable macroporous ferrogel microbeads provide a promising platform for on-demand drug delivery.
- The developed microbeads offer structural stability, injectability, and magnetic responsiveness.
- These ferrogel microbeads hold significant potential for diverse biomedical applications.
