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Updated: Jun 24, 2025
Preparation and Characterization of Graphene-Based 3D Biohybrid Hydrogel Bioink for Peripheral Neuroengineering
Published on: May 16, 2022
Integrating Graphene Oxide-Hydrogels and Electrical Stimulation for Controlled Neurotrophic Factor Encapsulation: A
Alexandre Xavier Mendes1,2, Lilith Caballero Aguilar2,3,4, Adriana Teixeira do Nascimento1,2
1ARC Centre of Excellence for Electromaterials Science, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, Victoria 3122, Australia.
This study presents a novel graphene oxide and GelMA hydrogel system for controlled nerve growth factor (NGF) delivery. The system significantly reduces burst release and enhances NGF retention, promoting neuronal regeneration for nerve tissue engineering.
Area of Science:
- Biomaterials Science
- Neuroscience
- Tissue Engineering
Background:
- Nerve growth factor (NGF) is vital for neuronal growth and differentiation.
- Effective in vitro NGF delivery requires precise spatiotemporal control to mimic natural neuronal processes.
- Uncontrolled burst release from current delivery systems limits therapeutic efficacy.
Purpose of the Study:
- To develop a highly controllable NGF delivery system using graphene oxide (GO) and GelMA hydrogels.
- To investigate the modulation of NGF release kinetics via electrical stimulation.
- To assess the system's capacity for NGF sequestration, retention, and its impact on neurodifferentiation.
Main Methods:
- Fabrication of a composite hydrogel system using graphene oxide (GO) and methacryloyl gelatin (GelMA).
- Evaluation of NGF release kinetics under electrical stimulation.
- Quantification of NGF sequestration and retention capacity compared to GelMA hydrogels alone.
- Assessment of neurodifferentiation through gene expression and immunostaining analysis.
Main Results:
- The GO-GelMA hydrogel system demonstrated superior control over NGF release kinetics, reducing burst release by up to 30-fold.
- The system exhibited enhanced NGF sequestration and retention, holding up to 10 times more NGF than GelMA hydrogels alone.
- Controlled NGF release from the system successfully promoted neurodifferentiation, confirmed by molecular and cellular analyses.
Conclusions:
- The developed GO-GelMA hydrogel system offers significant control over NGF release, addressing the challenge of burst release in nerve tissue engineering.
- Enhanced NGF retention and controlled release pave the way for more effective neuronal regeneration strategies.
- This innovative system presents a promising approach for advancing nerve tissue engineering research and therapeutic applications.
