Optogenetic Inhibition
Optogenetic Inhibition - Related Videos
09:43
Using Optogenetics to Reverse Neuroplasticity and Inhibit Cocaine Seeking in Rats
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Cited by 1 •
2021
The methods described here outline a procedure used to optogenetically reverse cocaine-induced plasticity in a behaviorally-relevant circuit in rats. Sustained low-frequency optical stimulation of thalamo-amygdala synapses induces long-term depression (LTD). In vivo optogenetically-induced LTD in cocaine-experienced rats resulted in the subsequent attenuation of cue-motivated drug seeking.
06:06
Optogenetic Functional MRI
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Cited by 18 •
2016
This protocol describes the steps and data analysis required to successfully perform optogenetic functional magnetic resonance imaging (ofMRI). ofMRI is a novel technique that combines high-field fMRI readout with optogenetic stimulation, allowing for cell type-specific mapping of functional neural circuits and their dynamics across the whole living brain.
02:30
Optogenetic Control of Hippocampal Network Dynamics
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2025
This video demonstrates the method to use optogenetics to modulate hippocampal network dynamics by activating genetically modified light-sensitive interneurons in a mouse brain slice, enhancing theta oscillation synchronization and studying neural circuit behavior.
12:35
Optogenetic Inhibition of Rho1-Mediated Actomyosin Contractility Coupled with Measurement of Epithelial Tension in Drosophila Embryos
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2023
Actomyosin contractility plays an important role in cell and tissue morphogenesis. However, it is challenging to manipulate actomyosin contractility in vivo acutely. This protocol describes an optogenetic system that rapidly inhibits Rho1-mediated actomyosin contractility in Drosophila embryos, revealing the immediate loss of epithelial tension after the inactivation of actomyosin in vivo.
11:13
Ex Vivo Optogenetic Dissection of Fear Circuits in Brain Slices
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Cited by 8 •
2016
Optogenetic approaches are widely used to manipulate neural activity and assess the consequences for brain function. Here, a technique is outlined that upon in vivo expression of the optical activator Channelrhodopsin, allows for ex vivo analysis of synaptic properties of specific long range and local neural connections in fear-related circuits.
FAQs
The two main inhibitory designs alter membrane ions in different ways. Chloride pumps move chloride ions, whereas proton pumps move protons; illumination changes the membrane’s electrical state and can hyperpolarize the targeted cell. This distinction matters because the chosen opsin determines which ion movement underlies suppression, helping investigators connect optical stimulation to altered cellular excitability.
Genetic targeting confines inhibition to selected cell populations rather than applying the same suppression across every nearby cell. That cell-type specificity helps researchers determine which neural elements contribute to a circuit function or disease-related activity. In medicine, this is especially useful when comparing the roles of distinct cells in epilepsy, pain, movement disorders, or psychiatric conditions.
Millisecond-scale light control allows inhibition to be aligned with specific events in neural-circuit activity. Researchers can therefore test whether suppressing a targeted population at a defined moment changes circuit behavior, rather than relying only on slower or less selective interventions. This temporal precision supports more direct analysis of cause-and-effect relationships in excitable tissues.
A basic workflow begins by introducing a light-sensitive microbial opsin into genetically selected cells, followed by illumination and assessment of changes in activity or excitability. The intervention is then interpreted in relation to the targeted circuit or tissue, linking a defined population and light condition to an inhibitory outcome.
Optogenetic inhibition can be applied to disease models to test how reducing activity in selected circuits affects epilepsy, pain, movement disorders, and psychiatric conditions. The resulting circuit-level information helps identify mechanisms associated with disease and can guide evaluation of targeted neuromodulation strategies, while distinguishing experimental investigation from an established therapy.
Because the method can act on genetically specified cells and at millisecond-scale timing, it supports experiments that separate circuit participation from broader tissue effects. Investigators can use those results to evaluate whether a particular population or circuit is relevant to a disorder and whether targeted neuromodulation deserves further study in neural or other excitable tissues.