An inexpensive programmable optogenetic platform for controlled neuronal activation regimens in C. elegans

Area of Science:

• Neuroscience
• Biotechnology
• Animal Models

Background:

• Optogenetic stimulation is crucial for studying neuronal function in Caenorhabditis elegans.
• Existing methods often require expensive, high-end equipment, limiting accessibility.
• There is a need for cost-effective and flexible optogenetic tools for C. elegans research.

Purpose of the Study:

• To present an accessible and programmable optogenetic stimulation platform for C. elegans.
• To enable both single-animal and whole-population stimulation modes.
• To facilitate quantitative assessment of neuronal and behavioral responses.

Main Methods:

• Integration of accessible electronic components (LED, Arduino, relay) with MATLAB for programmable control.
• Development of two stimulation modes: single-animal with locomotion tracking and entire-population stimulation.
• Application in stimulating cholinergic motor neurons and assessing synaptic plasticity via aldicarb assay.

Main Results:

• Demonstrated quantitative assessment of optogenetic-driven locomotion responses in single C. elegans.
• Observed significant changes in synaptic strength after neuronal exercise regimens in population stimulation.
• The platform provided illumination strength comparable to high-end systems.

Conclusions:

• The developed platform offers a flexible, cost-effective solution for optogenetic stimulation in C. elegans.
• It enables quantitative analysis of neuronal function, locomotion, and synaptic plasticity.
• This accessible system democratizes advanced optogenetic research in C. elegans.