Toolkit/multiplexing FSCV and fluorescence sensors

multiplexing FSCV and fluorescence sensors

Assay Method·Research·Since 2025

Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.

Summary

This study shows that multiplexing FSCV and fluorescence sensors (iGluSnFR3.v857) allows simultaneous monitoring of multiple neurotransmitters

Usefulness & Problems

Why this is useful

This multiplexed assay combines FSCV with a genetically encoded fluorescence sensor to enable simultaneous monitoring of multiple neurotransmitters. In this paper it is used to study adenosine, dopamine, and glutamate in caudate tissue.; simultaneous monitoring of multiple neurotransmitters; combining high temporal resolution electrochemistry with spatially resolved fluorescence sensing

Source:

This multiplexed assay combines FSCV with a genetically encoded fluorescence sensor to enable simultaneous monitoring of multiple neurotransmitters. In this paper it is used to study adenosine, dopamine, and glutamate in caudate tissue.

Source:

simultaneous monitoring of multiple neurotransmitters

Source:

combining high temporal resolution electrochemistry with spatially resolved fluorescence sensing

Problem solved

It addresses the difficulty of measuring different neurotransmitters simultaneously by combining complementary sensing modalities. The paper uses this to investigate spatial and temporal profiles of adenosine neuromodulation.; addresses the challenge of simultaneous measurements of different neurotransmitters

Source:

It addresses the difficulty of measuring different neurotransmitters simultaneously by combining complementary sensing modalities. The paper uses this to investigate spatial and temporal profiles of adenosine neuromodulation.

Source:

addresses the challenge of simultaneous measurements of different neurotransmitters

Problem links

addresses the challenge of simultaneous measurements of different neurotransmitters

Literature

It addresses the difficulty of measuring different neurotransmitters simultaneously by combining complementary sensing modalities. The paper uses this to investigate spatial and temporal profiles of adenosine neuromodulation.

Source:

It addresses the difficulty of measuring different neurotransmitters simultaneously by combining complementary sensing modalities. The paper uses this to investigate spatial and temporal profiles of adenosine neuromodulation.

Published Workflows

Multiplexing FSCV and iGluSnFR3 Sensors Reveals Adenosine Transiently Inhibits Stimulated Dopamine and Glutamate Release.

2025

Objective: Simultaneously measure adenosine, dopamine, and glutamate to investigate the spatial and temporal profiles of adenosine neuromodulation in the caudate.

Why it works: The abstract states that genetically encoded sensors provide high spatial resolution while electrochemistry provides high time resolution, so multiplexing the two modalities is expected to capture complementary spatial and temporal information during neuromodulation experiments.

adenosine-mediated transient inhibition of stimulated dopamine releaseadenosine-mediated transient inhibition of stimulated glutamate releaseA1 receptor modulationFSCVgenetically encoded fluorescence sensinglocal pharmacological perturbation

Stages

  1. 1.
    Sensor expression in caudate-putamen(library_build)

    The glutamate sensor had to be expressed in the caudate-putamen region before multiplexed measurements could be performed in slices.

    Selection: Expression of the genetically encoded glutamate sensor in the target region

  2. 2.
    Brain slice multiplexed recording setup(functional_characterization)

    This stage establishes the multiplexed assay geometry needed to compare dopamine and glutamate release in the same slice region.

    Selection: Placement of a carbon fiber microelectrode near cells expressing the glutamate sensor to monitor stimulated dopamine release alongside glutamate sensing

  3. 3.
    Local adenosine perturbation and response measurement(secondary_characterization)

    The stage probes the neuromodulatory effect of adenosine on both neurotransmitter outputs in the multiplexed slice assay.

    Selection: Measure how local exogenous adenosine changes stimulated dopamine and glutamate release

  4. 4.
    A1 receptor antagonist confirmation(confirmatory_validation)

    This confirmatory stage tests the receptor mechanism underlying the observed inhibitory effect.

    Selection: Test whether DPCPX blocks the adenosine inhibition of dopamine and glutamate release

Steps

  1. 1.
    Express iGluSnFR3.v857 in caudate-putamenglutamate sensor

    Enable fluorescent glutamate measurement in the target region.

    Sensor expression is required before slice-based multiplexed measurements can be performed.

  2. 2.
    Implant a carbon fiber microelectrode near sensor-expressing cells in the brain slicemultiplexed recording components

    Monitor electrically stimulated dopamine release near cells reporting glutamate release.

    After sensor expression, the electrochemical recording hardware is positioned to create the simultaneous multimodal measurement geometry.

  3. 3.
    Apply exogenous adenosine locally and measure transient effects on stimulated dopamine and glutamate releasemultiplexed assay

    Test the spatial and temporal effects of adenosine neuromodulation on both neurotransmitter outputs.

    The perturbation is performed after the multiplexed recording setup is established so both neurotransmitter responses can be measured simultaneously.

  4. 4.
    Apply DPCPX to test whether A1 receptor antagonism blocks adenosine inhibition

    Confirm the receptor mechanism responsible for the observed inhibition.

    Mechanistic confirmation follows observation of the inhibitory phenotype so the authors can test whether the effect depends on A1 receptor signaling.

Taxonomy & Function

Primary hierarchy

Technique Branch

Method: A concrete measurement method used to characterize an engineered system.

Target processes

No target processes tagged yet.

Input: Electrical

Implementation Constraints

cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: sensor

The abstract supports that the method requires FSCV instrumentation, a carbon fiber microelectrode, and expression of iGluSnFR3.v857 in the caudate-putamen region. It is implemented in brain slices.; requires combining FSCV with a genetically encoded fluorescence sensor such as iGluSnFR3.v857; used in brain slice experiments in caudate-putamen

The abstract does not claim unlimited multiplexing capacity. It explicitly notes limited colors for genetically encoded sensors and limited electroactive analyte scope for electrochemistry.; inherits limited color availability from genetically encoded sensors; inherits analyte limitations from electrochemistry

Validation

Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication

Supporting Sources

Ranked Claims

Claim 1biological effectsupports2025Source 1needs review

Local exogenous adenosine transiently inhibited electrically stimulated dopamine and glutamate release.

Exogenous adenosine was applied locally to the brain slice, lasting 30 s, resulting in a transient inhibitory effect on both electrically stimulated dopamine and glutamate release.
adenosine application duration 30 s
Claim 2correlationsupports2025Source 1needs review

Stimulated glutamate release and stimulated dopamine release were inversely correlated across measured areas.

Glutamate and dopamine release were inversely correlated, with areas with high stimulated glutamate release displaying low stimulated dopamine release and vice versa.
Claim 3method capabilitysupports2025Source 1needs review

Multiplexing FSCV and iGluSnFR3.v857 allows simultaneous monitoring of multiple neurotransmitters including adenosine, dopamine, and glutamate.

we multiplexed fast-scan cyclic voltammetry (FSCV) and genetically encoded fluorescence sensors to simultaneously measure adenosine, dopamine, and glutamate
Claim 4recoverysupports2025Source 1needs review

Dopamine and glutamate release recovered 10 minutes after adenosine injection.

Dopamine and glutamate release recovered 10 min after adenosine injection.
recovery time 10 min
Claim 5spatial constraintsupports2025Source 1needs review

Adenosine-mediated inhibition was observed only within 250 μm, indicating regional inhibition effects.

Inhibition by adenosine was observed only within a 250 μm distance, showing regional inhibition effects.
inhibition distance 250 μm

Approval Evidence

1 source4 linked approval claimsfirst-pass slug multiplexing-fscv-and-fluorescence-sensors
This study shows that multiplexing FSCV and fluorescence sensors (iGluSnFR3.v857) allows simultaneous monitoring of multiple neurotransmitters

Source:

biological effectsupports

Local exogenous adenosine transiently inhibited electrically stimulated dopamine and glutamate release.

Exogenous adenosine was applied locally to the brain slice, lasting 30 s, resulting in a transient inhibitory effect on both electrically stimulated dopamine and glutamate release.

Source:

method capabilitysupports

Multiplexing FSCV and iGluSnFR3.v857 allows simultaneous monitoring of multiple neurotransmitters including adenosine, dopamine, and glutamate.

we multiplexed fast-scan cyclic voltammetry (FSCV) and genetically encoded fluorescence sensors to simultaneously measure adenosine, dopamine, and glutamate

Source:

recoverysupports

Dopamine and glutamate release recovered 10 minutes after adenosine injection.

Dopamine and glutamate release recovered 10 min after adenosine injection.

Source:

spatial constraintsupports

Adenosine-mediated inhibition was observed only within 250 μm, indicating regional inhibition effects.

Inhibition by adenosine was observed only within a 250 μm distance, showing regional inhibition effects.

Source:

Comparisons

Source-stated alternatives

The source contrasts the multiplexed combination against using genetically encoded sensors alone or electrochemistry alone.

Source:

The source contrasts the multiplexed combination against using genetically encoded sensors alone or electrochemistry alone.

Source-backed strengths

allows simultaneous monitoring of multiple neurotransmitters; combines complementary strengths of electrochemistry and genetically encoded sensors

Source:

allows simultaneous monitoring of multiple neurotransmitters

Source:

combines complementary strengths of electrochemistry and genetically encoded sensors

Compared with genetically encoded sensors

The source contrasts the multiplexed combination against using genetically encoded sensors alone or electrochemistry alone.

Shared frame: source-stated alternative in extracted literature

Strengths here: allows simultaneous monitoring of multiple neurotransmitters; combines complementary strengths of electrochemistry and genetically encoded sensors.

Relative tradeoffs: inherits limited color availability from genetically encoded sensors; inherits analyte limitations from electrochemistry.

Source:

The source contrasts the multiplexed combination against using genetically encoded sensors alone or electrochemistry alone.

Ranked Citations

  1. 1.
    StructuralSource 1MED2025Claim 1Claim 2Claim 3

    Extracted from this source document.