Functionalized Reduced Graphene Oxide-Based Nanocomposite Hydrogels for Enhanced Osteogenesis in Bone Tissue
George Mihail Vlăsceanu1,2, Cătălina Ionela Zamfir1, Cornel Baltă3
1Faculty of Medical Engineering, National University of Science and Technology Politehnica Bucharest, Gheorghe Polizu 1-7, Bucharest, 011061, Romania.
Advanced Healthcare Materials
|August 7, 2025
Summary
New nanocomposite hydrogels combining functionalized reduced graphene oxide (rGO) with biopolymers promote bone regeneration. These advanced scaffolds show excellent biocompatibility and osteogenic potential for bone tissue engineering applications.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Nanotechnology
Background:
- Bone tissue engineering requires advanced scaffolds to promote osteogenesis.
- Functionalized reduced graphene oxide (rGO) derivatives offer promising properties for biomaterials.
- Integrating rGO with natural polymers can enhance scaffold performance.
Purpose of the Study:
- To develop and characterize nanocomposite hydrogels for enhanced bone regeneration.
- To investigate the osteogenic potential of scaffolds integrating carboxylated (CBX) and aminated (AMN) rGO derivatives with gellan gum, gelatin, and cellulose nanofibrils (CNFs).
Main Methods:
- Synthesis of nanocomposite hydrogels using ultrasound exfoliation, genipin crosslinking, and freeze-drying.
- Characterization via micro-computed tomography (µCT), spectroscopy, and degradation studies.
- In vitro cytocompatibility, cell viability, and osteogenic differentiation assays.
- In vivo subcutaneous implantation in mice followed by histological and immunofluorescence analyses.
Main Results:
- Scaffolds exhibited highly porous, interconnected architectures with superior hydration and biphasic degradation.
- Enhanced interfacial interactions contributed to structural stability.
- In vitro studies confirmed cytocompatibility and promoted osteogenic differentiation.
- In vivo implantation demonstrated biocompatibility, with histological analysis revealing osteogenic potential and mineralization.
Conclusions:
- Synergistic integration of functionalized rGO, CNFs, and biopolymers yields scaffolds with enhanced structural and biological properties.
- These nanocomposite hydrogels show significant potential for bone regenerative medicine.
- Findings highlight opportunities for design optimization and clinical translation.
