Electro-optical Neural Platform Integrated with Nanoplasmonic Inhibition Interface.

Area of Science:

• Neuroscience
• Biomedical Engineering
• Materials Science

Background:

• Developing neural interfaces for brain disorder research is crucial.
• Inhibiting electrical activity in unmodified neurons presents a significant challenge.
• Existing methods like optogenetics require genetic modification.

Purpose of the Study:

• To engineer an electro-optical neural platform for remote manipulation of neural activity.
• To achieve simultaneous electrical excitation/readout and photothermal inhibition of neuronal electrical activity.
• To overcome limitations of current neural interface technologies.

Main Methods:

• Integration of gold nanorods with a microelectrode array at electrode-neuron interfaces.
• Utilizing a nanoplasmonic interface for photothermal stimulation and inhibition.
• Characterization of the interface's interaction with neurons and electrodes, assessing biological and electrical properties.

Main Results:

• The gold nanorod interface demonstrated effective interaction with neurons and electrodes without adverse effects.
• Spontaneous neuronal firing was successfully inhibited optically.
• Signal propagation along neurites, even when evoked by electrical stimulation, was optically inhibited.
• The platform enabled simultaneous electrical readout and optical inhibition.

Conclusions:

• The developed electro-optical neural platform with gold nanorods offers a novel method for neural activity modulation.
• This approach provides an alternative to optogenetics for controlling unmodified neurons.
• Potential applications include advanced brain disorder research and optical neuromodulation-based prosthetic devices.