Source 1primary paper2014Journal of Neuroscience
Toolkit/PRS promoter-driven channelrhodopsin-2 lentiviral vector
PRS promoter-driven channelrhodopsin-2 lentiviral vector
Also known as: lentiviral vector expressing channelrhodopsin2 under the control of the PRS promoter
Taxonomy: Mechanism Branch / Architecture. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
We transduced rat LC neurons by direct injection of a lentiviral vector expressing channelrhodopsin2 under the control of the PRS promoter.
Usefulness & Problems
Why this is useful
This viral construct pattern drives channelrhodopsin-2 expression in rat LC neurons using the PRS promoter, enabling optical activation of the transduced population. In this study it was used to test how LC excitation affects thermal nociception.; optogenetic targeting of rat locus ceruleus neurons; selective transgene expression in noradrenergic neurons
Source:
This viral construct pattern drives channelrhodopsin-2 expression in rat LC neurons using the PRS promoter, enabling optical activation of the transduced population. In this study it was used to test how LC excitation affects thermal nociception.
Source:
optogenetic targeting of rat locus ceruleus neurons
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selective transgene expression in noradrenergic neurons
Problem solved
It solves the problem of experimentally exciting LC noradrenergic neurons in rats with temporal control. This allows causal testing of LC contributions to nociceptive processing.; enables optical excitation of LC neurons in rats using viral gene delivery; provides promoter-based targeting to noradrenergic neurons
Source:
It solves the problem of experimentally exciting LC noradrenergic neurons in rats with temporal control. This allows causal testing of LC contributions to nociceptive processing.
Source:
enables optical excitation of LC neurons in rats using viral gene delivery
Source:
provides promoter-based targeting to noradrenergic neurons
Problem links
enables optical excitation of LC neurons in rats using viral gene delivery
LiteratureIt solves the problem of experimentally exciting LC noradrenergic neurons in rats with temporal control. This allows causal testing of LC contributions to nociceptive processing.
Source:
It solves the problem of experimentally exciting LC noradrenergic neurons in rats with temporal control. This allows causal testing of LC contributions to nociceptive processing.
provides promoter-based targeting to noradrenergic neurons
LiteratureIt solves the problem of experimentally exciting LC noradrenergic neurons in rats with temporal control. This allows causal testing of LC contributions to nociceptive processing.
Source:
It solves the problem of experimentally exciting LC noradrenergic neurons in rats with temporal control. This allows causal testing of LC contributions to nociceptive processing.
Published Workflows
Optoactivation of Locus Ceruleus Neurons Evokes Bidirectional Changes in Thermal Nociception in Rats
2014Objective: Test whether selective optogenetic excitation of rat locus ceruleus noradrenergic neurons is antinociceptive and determine whether functional heterogeneity within LC explains bidirectional thermal nociception effects.
Why it works: The workflow combines promoter-based viral expression of channelrhodopsin-2 in LC neurons with optical activation to causally perturb the targeted population, then uses behavioral nociception readout and post hoc anatomy to relate functional effects to transduced neuron location.
excitation of locus ceruleus noradrenergic neuronssubpopulation-specific control of thermal nociceptionoptogenetic targetinglentiviral transductionbehavioral thermal withdrawal testingpost hoc anatomical characterization
Stages
- 1.Viral targeting of LC neurons(library_build)
This stage creates the optogenetically addressable LC neuron population needed for subsequent functional testing.
Selection: Expression of channelrhodopsin-2 in rat LC neurons using a PRS promoter-driven lentiviral vector.
- 2.Functional behavioral testing after LC optoactivation(functional_characterization)
This stage tests whether excitation of the targeted LC population changes thermal nociception and quantifies the direction and magnitude of the effect.
Selection: Changes in hindpaw thermal withdrawal thresholds after LC optoactivation.
- 3.Post hoc anatomical-functional localization(secondary_characterization)
This stage explains mixed behavioral outcomes by linking antinociception to a distinct ventral LC subpopulation.
Selection: Distribution of transduced somata relative to optical fiber position and further functional analysis.
Taxonomy & Function
Primary hierarchy
Mechanism Branch
Architecture: A reusable architecture pattern for arranging parts into an engineered system.
Mechanisms
optogenetic depolarization via channelrhodopsin-2promoter-driven cell-type-targeted transgene expressionTechniques
No technique tags yet.
Target processes
No target processes tagged yet.
Input: Thermal
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationimplementation constraint: payload burdenoperating role: actuator
The abstract supports the need for a lentiviral injection into the LC and subsequent optoactivation with an optical fiber. It also implies anatomical follow-up to map transduced somata relative to fiber position.; requires direct injection into the rat locus ceruleus; requires optical fiber placement and light delivery for optoactivation
The abstract does not show that this approach isolates a single functionally uniform LC population, because both anti- and pronociceptive effects were observed. It also does not establish exact projection specificity from the abstract alone.; the abstract does not specify exact construct notation or full selectivity limits; functional outcomes were bidirectional rather than uniformly antinociceptive
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Optoactivation of PRS promoter-targeted channelrhodopsin-2-expressing rat locus ceruleus neurons evokes repeatable, robust bidirectional changes in hindpaw thermal withdrawal thresholds.
Subsequent optoactivation of the LC evoked repeatable, robust, antinociceptive (+4.7°C ± 1.0, p < 0.0001) or pronociceptive (-4.4°C ± 0.7, p < 0.0001) changes in hindpaw thermal withdrawal thresholds.
thermal withdrawal threshold change 4.7 °Cthermal withdrawal threshold change -4.4 °C
Antinociceptive actions from locus ceruleus optoactivation were evoked from a distinct ventral subpopulation of LC neurons.
Post hoc anatomical characterization of the distribution of transduced somata referenced against the position of the optical fiber and subsequent further functional analysis showed that antinociceptive actions were evoked from a distinct, ventral subpopulation of LC neurons.
Approval Evidence
1 source2 linked approval claimsfirst-pass slug prs-promoter-driven-channelrhodopsin-2-lentiviral-vector
We transduced rat LC neurons by direct injection of a lentiviral vector expressing channelrhodopsin2 under the control of the PRS promoter.
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application resultsupports
Optoactivation of PRS promoter-targeted channelrhodopsin-2-expressing rat locus ceruleus neurons evokes repeatable, robust bidirectional changes in hindpaw thermal withdrawal thresholds.
Subsequent optoactivation of the LC evoked repeatable, robust, antinociceptive (+4.7°C ± 1.0, p < 0.0001) or pronociceptive (-4.4°C ± 0.7, p < 0.0001) changes in hindpaw thermal withdrawal thresholds.
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mechanistic localizationsupports
Antinociceptive actions from locus ceruleus optoactivation were evoked from a distinct ventral subpopulation of LC neurons.
Post hoc anatomical characterization of the distribution of transduced somata referenced against the position of the optical fiber and subsequent further functional analysis showed that antinociceptive actions were evoked from a distinct, ventral subpopulation of LC neurons.
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Comparisons
Source-stated alternatives
The provided web summary mentions related noradrenergic-targeting promoter strategies such as PRSx8 and later projection-capable constructs like CAV2-PRSx8-ChR2-mCherry. It also mentions chemogenetic and ablation-based comparison approaches in related literature.
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The provided web summary mentions related noradrenergic-targeting promoter strategies such as PRSx8 and later projection-capable constructs like CAV2-PRSx8-ChR2-mCherry. It also mentions chemogenetic and ablation-based comparison approaches in related literature.
Source-backed strengths
supports optoactivation of LC neurons in vivo; uses PRS promoter for selective targeting of noradrenergic neurons
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supports optoactivation of LC neurons in vivo
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uses PRS promoter for selective targeting of noradrenergic neurons
Compared with chemogenetic circuit manipulation
The provided web summary mentions related noradrenergic-targeting promoter strategies such as PRSx8 and later projection-capable constructs like CAV2-PRSx8-ChR2-mCherry. It also mentions chemogenetic and ablation-based comparison approaches in related literature.
Shared frame: source-stated alternative in extracted literature
Strengths here: supports optoactivation of LC neurons in vivo; uses PRS promoter for selective targeting of noradrenergic neurons.
Relative tradeoffs: the abstract does not specify exact construct notation or full selectivity limits; functional outcomes were bidirectional rather than uniformly antinociceptive.
Source:
The provided web summary mentions related noradrenergic-targeting promoter strategies such as PRSx8 and later projection-capable constructs like CAV2-PRSx8-ChR2-mCherry. It also mentions chemogenetic and ablation-based comparison approaches in related literature.
Ranked Citations