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Anatomically Inspired Three-dimensional Micro-tissue Engineered Neural Networks for Nervous System Reconstruction, Modulation, and Modeling
Published on: May 31, 2017
Three-dimensional highly porous hydrogel scaffold for neural circuit dissection and modulation
Mengying Yan1, Lulu Wang1, Yiyong Wu1
1CAS Key Laboratory of Brain Connectome and Manipulation, the Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen 518055, China.
Researchers developed novel 3D hydrogel scaffolds to mimic the brain extracellular matrix for neural network studies. These scaffolds enable in vitro construction and manipulation of neural circuits, aiding in understanding neurological disorders.
Area of Science:
- Neuroscience
- Biomaterials Science
- Biotechnology
Background:
- Three-dimensional (3D) cell cultures offer superior mimicry of in vivo neural networks compared to 2D methods.
- A significant challenge in 3D neural culture is the lack of suitable scaffolds resembling the natural extracellular matrix for neuron support, recording, and manipulation.
- Existing biomimetic scaffolds often fall short in replicating the complex microenvironment necessary for accurate neural circuit studies.
Purpose of the Study:
- To develop and characterize innovative 3D hydrogel scaffolds for advanced neural network construction and study.
- To create a biomimetic scaffold that supports neuron culturing, electrophysiological recording, and targeted manipulation within a 3D environment.
- To demonstrate the utility of these scaffolds in dissecting neural circuit function and exploring potential therapeutic interventions for neurological disorders.
Main Methods:
- Fabrication of 3D hydrogel scaffolds using a novel thermal treatment followed by esterification.
- Characterization of scaffold microstructure, porosity (91%), and mechanical properties (Young's modulus of 6.11 kPa).
- Construction of 3D neural networks in vitro, detection of action potentials, induction of seizure-like activity, and suppression via selective GABAergic interneuron activation.
Main Results:
- The fabricated hydrogel scaffolds possess a highly porous microstructure and low Young's modulus, suitable for neural tissue engineering.
- Successfully established functional 3D neural networks in vitro, capable of spontaneous action potential detection.
- Demonstrated the ability to induce and suppress seizure-like activity in 3D cultured neurons, validating the scaffold's utility for circuit manipulation.
Conclusions:
- The developed hydrogel scaffolds provide a simplified, low-cost, and effective platform for building and studying 3D neural networks in vitro.
- These scaffolds accurately mimic in vivo neural connections, facilitating precise dissection and manipulation of neural circuit structure and function.
- The findings highlight the potential of this technology for advancing the understanding and treatment of neurological disorders.
