Source 1primary paper2016Proceedings of the National Academy of Sciences
Toolkit/fiber photometry calcium imaging
fiber photometry calcium imaging
Also known as: fiber photometry
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
Using fiber photometry calcium imaging we define D1 MSNs as the specific population of cells in NAc that encodes information about drug associations
Usefulness & Problems
Why this is useful
Fiber photometry calcium imaging is used here to monitor activity dynamics of D1- and D2-type medium spiny neuron populations in the nucleus accumbens during cocaine-related behaviors. The abstract specifically links it to defining D1 MSN encoding of drug associations and temporal cue responses.; in vivo monitoring of calcium activity in defined nucleus accumbens MSN populations during cocaine-related behaviors; resolving temporal activity signatures associated with contextual drug cues
Source:
Fiber photometry calcium imaging is used here to monitor activity dynamics of D1- and D2-type medium spiny neuron populations in the nucleus accumbens during cocaine-related behaviors. The abstract specifically links it to defining D1 MSN encoding of drug associations and temporal cue responses.
Source:
in vivo monitoring of calcium activity in defined nucleus accumbens MSN populations during cocaine-related behaviors
Source:
resolving temporal activity signatures associated with contextual drug cues
Problem solved
It addresses the prior lack of understanding of how endogenous D1 and D2 MSN activity is affected by cocaine and encodes drug-associated behavior.; measuring endogenous activity dynamics of D1- and D2-type medium spiny neurons during cocaine reward and cue association
Source:
It addresses the prior lack of understanding of how endogenous D1 and D2 MSN activity is affected by cocaine and encodes drug-associated behavior.
Source:
measuring endogenous activity dynamics of D1- and D2-type medium spiny neurons during cocaine reward and cue association
Problem links
measuring endogenous activity dynamics of D1- and D2-type medium spiny neurons during cocaine reward and cue association
LiteratureIt addresses the prior lack of understanding of how endogenous D1 and D2 MSN activity is affected by cocaine and encodes drug-associated behavior.
Source:
It addresses the prior lack of understanding of how endogenous D1 and D2 MSN activity is affected by cocaine and encodes drug-associated behavior.
Published Workflows
In vivo imaging identifies temporal signature of D1 and D2 medium spiny neurons in cocaine reward
2016Objective: Define how endogenous D1- and D2-type nucleus accumbens medium spiny neuron activity responds to acute cocaine and context-reward association formation, and test whether dysregulated D1 signaling causally contributes to relapse-related behaviors.
Why it works: The workflow combines in vivo recording of endogenous activity with direct manipulation of the implicated D1 signals, allowing the authors to first identify a cell-type-specific temporal signature and then test whether that signal is causally involved in contextual associations.
D1 MSN encoding of drug associationscocaine-induced dysregulation of D1 signaling linked to relapse-related behaviorfiber photometry calcium imagingDREADD-based direct manipulation
Stages
- 1.In vivo fiber photometry characterization of D1 and D2 MSN responses(functional_characterization)
This stage addresses the stated lack of understanding of how endogenous D1 and D2 MSN activity is affected by cocaine and encodes drug-associated behaviors.
Selection: Measure endogenous activity of D1- and D2-type nucleus accumbens medium spiny neurons during acute cocaine exposure and context-reward association formation.
- 2.Direct manipulation of D1 signals to test causal role in contextual associations(confirmatory_validation)
This stage tests whether the D1-linked signal identified in the imaging stage is causally involved in contextual drug associations.
Selection: Perturb the D1 signal identified by imaging using DREADDs and assess whether contextual associations are prevented.
Steps
- 1.Record endogenous D1 and D2 MSN calcium activity during cocaine-related behavioral conditionsassay method
Define how endogenous activity of D1- and D2-type nucleus accumbens medium spiny neurons is affected by cocaine and contextual cues.
The abstract frames this as the first needed step because prior work had shown causal effects of optogenetic stimulation but not how endogenous activity encodes drug-associated behavior.
- 2.Manipulate the identified D1 signal using DREADDs and assess contextual association outcomecausal perturbation system
Test whether the D1 signal identified by imaging is causally required for contextual associations.
This step follows imaging because the abstract indicates that D1 signals were first identified as encoding drug associations and then directly manipulated.
Taxonomy & Function
Primary hierarchy
Technique Branch
Method: A concrete measurement method used to characterize an engineered system.
Techniques
Functional AssayTarget processes
recombinationInput: Light
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationimplementation constraint: spectral hardware requirementoperating role: sensor
The abstract supports that calcium imaging was performed in vivo with fiber photometry in nucleus accumbens MSN populations. It does not provide further hardware or construct details.; requires calcium imaging setup based on fiber photometry; requires access to the targeted MSN population in nucleus accumbens
From the abstract alone, it does not establish detailed circuit mechanism or provide all implementation details for cell targeting and recording.; the abstract does not specify single-cell resolution or detailed assay constraints
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Fiber photometry calcium imaging identified D1 medium spiny neurons in nucleus accumbens as the specific population encoding information about cocaine-associated drug associations.
Using fiber photometry calcium imaging we define D1 MSNs as the specific population of cells in NAc that encodes information about drug associations
Direct manipulation of D1 signals using DREADDs prevents contextual associations.
Directly manipulating these D1 signals using designer receptors exclusively activated by designer drugs prevents contextual associations.
D1 medium spiny neuron activity increases with a temporal profile that drives drug seeking in response to contextual cues.
elucidate the temporal profile with which D1 activity is increased to drive drug seeking in response to contextual cues
Approval Evidence
1 source2 linked approval claimsfirst-pass slug fiber-photometry-calcium-imaging
Using fiber photometry calcium imaging we define D1 MSNs as the specific population of cells in NAc that encodes information about drug associations
Source:
activity encodingsupports
Fiber photometry calcium imaging identified D1 medium spiny neurons in nucleus accumbens as the specific population encoding information about cocaine-associated drug associations.
Using fiber photometry calcium imaging we define D1 MSNs as the specific population of cells in NAc that encodes information about drug associations
Source:
temporal signaturesupports
D1 medium spiny neuron activity increases with a temporal profile that drives drug seeking in response to contextual cues.
elucidate the temporal profile with which D1 activity is increased to drive drug seeking in response to contextual cues
Source:
Comparisons
Source-stated alternatives
The abstract contrasts this endogenous activity measurement approach with prior optogenetic stimulation studies that causally manipulated D1 or D2 MSNs.
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The abstract contrasts this endogenous activity measurement approach with prior optogenetic stimulation studies that causally manipulated D1 or D2 MSNs.
Source-backed strengths
supports in vivo temporal profiling of neuronal population activity during behavior
Source:
supports in vivo temporal profiling of neuronal population activity during behavior
Compared with optogenetic
The abstract contrasts this endogenous activity measurement approach with prior optogenetic stimulation studies that causally manipulated D1 or D2 MSNs.
Shared frame: source-stated alternative in extracted literature
Strengths here: supports in vivo temporal profiling of neuronal population activity during behavior.
Relative tradeoffs: the abstract does not specify single-cell resolution or detailed assay constraints.
Source:
The abstract contrasts this endogenous activity measurement approach with prior optogenetic stimulation studies that causally manipulated D1 or D2 MSNs.
Ranked Citations
- 1.