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Updated: Oct 25, 2025
Gelatin Methacryloyl Granular Hydrogel Scaffolds: High-throughput Microgel Fabrication, Lyophilization, Chemical Assembly, and 3D Bioprinting
Published on: December 9, 2022
3D-Printable Hierarchical Nanogel-GelMA Composite Hydrogel System
Guangyue Zu1, Marnix Meijer1, Olga Mergel1
1University of Groningen, University Medical Center Groningen, Department of Biomedical Engineering, W. J. Kolff Institute for Biomedical Engineering and Materials Science, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands.
This study introduces a novel hierarchical nanogel-gelatin methacryloyl (GelMA) composite hydrogel. This advanced biomaterial enables controlled local functionality and the in situ delivery of bioactive molecules for 3D cell culture.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Nanomedicine
Background:
- The native extracellular matrix (ECM) offers hierarchical structure for biomolecule storage, a feature lacking in current ECM-like hydrogels.
- Existing hydrogels struggle to balance long-term storage with free diffusion of small molecules.
- Nanogels present a versatile platform for nanomedicine due to their tunable properties and biocompatibility.
Purpose of the Study:
- To develop a stable hierarchical nanogel-GelMA composite hydrogel system.
- To enable controlled local functionality and biomolecule delivery within a hydrogel network.
- To create a printable ink for 3D cell culture applications.
Main Methods:
- Covalently embedding surface-modified nanogels within the GelMA micropore network.
- Utilizing UV irradiation for photo-cross-linking to form the composite hydrogel.
- Characterizing hydrogel morphology via scanning electron microscopy and assessing stability through release experiments.
Main Results:
- The nanogel-GelMA composite hydrogel exhibited a stable hierarchical structure with nanogels integrated into the GelMA network.
- Scanning electron microscopy confirmed nanogel encapsulation within the GelMA matrix.
- Release experiments demonstrated the stability of the covalently bonded nanogels.
- The composite ink showed promising 3D printability.
Conclusions:
- The developed nanogel-GelMA composite hydrogel provides a stable, hierarchical system with controlled local functionality.
- This system overcomes limitations of homogenous hydrogels in biomolecule storage and diffusion.
- The composite hydrogel holds significant potential for in situ delivery and controlled release of bioactive molecules in 3D cell culture.
