The paper uses optogenetic stimulation to increase activity of defined cholinergic nuclei and test whether that activity changes DMG proliferation in vivo.
First-pass extracted concept
optogenetic stimulation
Candidate: concept label8 source documents18 linked claims
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Aliases
photostimulation
Extracted Explainers
What the tool is doing
The abstract names optogenetic stimulation as a newer neuromodulation option with potential relevance to stroke rehabilitation. It is included as part of the review's discussion of emerging approaches.
Optogenetic stimulation places electrically excitable cells under the control of light. In this review abstract, it is presented as an adjunctive alternative to classical electrode stimulation for cardiac studies.
Optogenetic stimulation is used here to activate defined mPFC neuronal subtypes and their terminals to test causal effects on antidepressant- and anxiety-related behaviors.
The abstract describes optogenetic stimulation as a way to activate engram cells and recover memory recall under amnesia. It is used to distinguish retained storage from failed natural retrieval.
Resources required
The abstract supports a need for optogenetic tools and light delivery. It does not specify particular opsins, hardware, or delivery methods.
The abstract supports a need for subtype-targeted photostimulation in mPFC neurons and terminal stimulation in the BLA, but does not name the specific construct or hardware.
The abstract supports that optogenetic stimulation is required, but does not specify the exact opsin, construct, or hardware in this paper.
What problem it solves
It expands the set of neuromodulation strategies considered for enhancing neural plasticity after stroke.
It addresses limitations of contact-dependent electrical stimulation, especially in scalable in vitro screening and multicellular cardiac propagation studies. The review highlights reduced stimulation artefacts and flexible spatial patterning as key benefits.
It helps identify which mPFC neuronal subtype and projection pathway can drive rapid antidepressant-like responses.
It reveals memory information that remains stored when natural recall cues fail after protein synthesis inhibition.
What it does not solve
The abstract does not specify how it is implemented in stroke settings or provide evidence of clinical efficacy.
The abstract does not claim that optogenetics replaces all electrophysiology methods or solves downstream delivery and construct-engineering challenges. It also does not specify performance limits for particular preparations.
The abstract does not show that optogenetic stimulation itself is a clinically deployable antidepressant treatment or define the exact molecular implementation.
It does not restore normal cue-driven retrieval on its own, and weak stimulation gives only partial recall.
Alternatives
The abstract mentions transcranial electric stimulation, transcranial magnetic stimulation, and environmental stimulation as other neuromodulatory approaches.
The explicit alternative discussed is classical electrode stimulation, including field stimulation approaches such as multi-electrode array-based measurements.
The paper contrasts stimulation of Drd1-expressing pyramidal cells with photostimulation of Drd2-expressing pyramidal cells and also discusses ketamine as a rapid-acting antidepressant comparator.
The abstract contrasts optogenetic stimulation with natural recall cues, which fail under the amnesia condition.
Evidence Snippets
Optogenetic stimulation of the cholinergic pedunculopontine nucleus (PPN) promotes glioma growth in pons, while stimulation of the laterodorsal tegmentum nucleus (LDT) drives proliferation in thalamus.
intensity-modulated optogenetic stimulation of pretectum induced progressively more lateralised contraversive orienting behaviour and spatially patterned stimulation of optic tectum revealed a motor map
some new options for neuromodulation which have great potential in stroke rehabilitation, such as optogenetic stimulation and environmental stimulation
We describe how these are overcome by optogenetic tools which put electrically excitable cells under the control of light.
The paper uses optogenetic stimulation with physiological readouts to identify peripheral neural circuits that regulate heart rate.
activating Drd1 expressing pyramidal cells in the mPFC produces rapid and long-lasting antidepressant and anxiolytic responses. In contrast, photostimulation of Drd2 expressing pyramidal cells was ineffective
Technology allowing genetically targeted cells to be modulated by light has revolutionized neuroscience in the past decade, and given rise to the field of optogenetic stimulation.
These engram cells can be activated by optogenetic stimulation for full-fledged recall, but not by stimulation using natural recall cues.
Supporting Sources
Linked Claims
Intensity-modulated optogenetic stimulation of pretectum induced progressively more lateralised contraversive orienting behaviour.
Spatially patterned optogenetic stimulation of optic tectum revealed an anterior-posterior motor map that primarily generated ipsiversive responses.
Optogenetic stimulation of cholinergic PPN promotes glioma growth in pons, whereas stimulation of cholinergic LDT drives proliferation in thalamus.
Quoted textsource-backed
Optogenetic stimulation of the cholinergic pedunculopontine nucleus (PPN) promotes glioma growth in pons, while stimulation of the laterodorsal tegmentum nucleus (LDT) drives proliferation in thalamus.
Additional studies are needed to develop standard neuromodulation protocols based on better understanding of molecular and cellular processes to optimize clinical efficacy.
Quoted textsource-backed
Additional studies are essential for developing standard protocols in neuromodulation based on a better understanding of the molecular and cellular processes for the ultimate optimization of clinical efficacy.
Neuromodulation techniques after stroke allow excitation and synchronization of neural activity and could potentially induce long-term potentiation.
Quoted textsource-backed
In general, these techniques allow the excitation and synchronization of the neural activity after stroke, which could potentially induce long-term potentiation.
Neuromodulation-driven neuroplastic effects can lead to better functional connection in the brain network in assisting stroke recovery.
Quoted textsource-backed
As a result, the neuroplastic effect can lead to better functional connection in the brain network in assisting stroke recovery.
Optogenetic stimulation enables cardiac studies from the single-cell scale to the whole-heart scale.
Quoted textsource-backed
We discuss how this enables studies in cardiac material from the single cell to the whole heart scale.
The study maps parasympathetic and sympathetic peripheral circuits controlling heart rate in mice using a whole-heart clearing and imaging pipeline, AAV-PHP.S-based sparse labeling, CTB retrograde tracing, and optogenetic stimulation with physiological readouts.
Optogenetic tools overcome limitations imposed by contact-dependent electrical stimulation in cardiac experimental systems.
Quoted textsource-backed
However, the contact dependence, and field stimulation that electrical depolarization delivers brings inherent limitations to the scope and experimental scale that can be achieved... We describe how these are overcome by optogenetic tools which put electrically excitable cells under the control of light.
This paper identifies peripheral neural circuits that regulate heart rate using optogenetic and viral vector strategies.
For iPS-CM based screening, optogenetic stimulation offers contact independence, avoids electrical stimulation artefacts in multi-electrode array field potential measurements, and allows patterned induction of re-entrant depolarization in 2D cardiomyocyte monolayers.
Quoted textsource-backed
We show that the advantages of optogenetic stimulation relevant to iPS-CM based screening include independence from contact, elimination of electrical stimulation artefacts in field potential measuring approaches such as the multi-electrode array, and the ability to print re-entrant patterns of depolarization at will on 2D cardiomyocyte monolayers.
Optogenetic stimulation has transformed the study of neural circuits related to cognition and behavior, especially learning and memory, by enabling genetically targeted light-based modulation.
Quoted textsource-backed
Technology allowing genetically targeted cells to be modulated by light has revolutionized neuroscience in the past decade... We review how the greater precision provided by optogenetics has transformed the study of neural circuits, in terms of cognition and behavior, with a focus on learning and memory.
Optogenetic modulation is facilitating better understanding of mechanistic underpinnings of neurological and psychiatric conditions.
Quoted textsource-backed
We also explain how optogenetic modulation is facilitating a better understanding of the mechanistic underpinnings of some neurological and psychiatric conditions.
The review suggests that optogenetics may provide tools to improve memory in neurological conditions, particularly diencephalic amnesia and Alzheimer's disease.
Quoted textsource-backed
Based on this research, we suggest that optogenetics may provide tools to improve memory in neurological conditions, particularly diencephalic amnesia and Alzheimer's disease.
Optogenetic memory recall under amnesia is stimulation strength-dependent, and low-power stimulation elicits only partial recall.
Full-fledged optogenetic recall persists at least 8 days after learning under protein synthesis inhibition-induced amnesia.
Optogenetic stimulation can activate silent engram cells for full-fledged recall, whereas natural recall cues cannot.
Inactivation of connectivity from engram cell ensembles to downstream counterparts, but not upstream ones, prevents optogenetic memory recall.