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Rewiring Neuronal Circuits: A New Method for Fast Neurite Extension and Functional Neuronal Connection
Published on: June 13, 2017
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A neuronal wiring platform through microridges for rationally engineered neural circuits.
Yu Wu1, Meijian Wang, Yong Wang2
1Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio 43210, USA.
APL Bioengineering
|December 21, 2020
Summary
Researchers developed a novel neural wiring technique using microridges to guide neuron growth, enabling precise neural circuit fabrication. This biomimetic approach facilitates organized cellular communication and rapid prototyping for research and clinical applications.
Area of Science:
- Neuroscience
- Biomaterials Engineering
- Biofabrication
Background:
- Fabricating precisely engineered neuronal circuits is crucial for research and clinical applications.
- Random cell plating in neural network fabrication leads to loss of neuron identity and control.
- Existing methods lack the precision required for controlled neural circuit assembly.
Purpose of the Study:
- To develop an accurate and unique neural wiring technique that mimics natural neuronal guidance.
- To enable precise plating and controlled neurite outgrowth for functional neural circuit construction.
- To validate the platform's efficacy using a microelectrode array for recording neural activity.
Main Methods:
- Photolithographic patterning of SU-8 microridges to mimic microfibers.
- Selective coating of microridges with poly-l-lysine for neuron adhesion.
- Accurate plating of *Aplysia californica* neurons onto designated locations using microfences.
- Culturing neurons *in vitro* and observing neurite regrowth along microridges.
- Integration of microridges with a microelectrode array for electrophysiological recordings.
Main Results:
- Neurons were accurately plated and immobilized on designated locations.
- Neurites exhibited guided regrowth along microridges, connecting adjacent neurons without crosstalk.
- Functional chemical synapses formed, allowing two-way electrical signal transmission.
- Electrophysiological recordings on the microelectrode array showed neuronal spikes and synaptic activity.
- Synaptic adaptation was observed, demonstrating the platform's functional capabilities.
Conclusions:
- The biomimetic neural wiring technique provides precise control over neural circuit fabrication.
- The platform effectively guides neurite pathfinding and promotes the formation of functional synaptic connections.
- This simple and effective method enables rational design, organized cellular communication, and fast prototyping of neuronal networks.
- The technology holds significant potential for advancing neuroscience research and developing neural prosthetics.
