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MO Grp-to-NAc Grpr circuit

Candidate: concept label1 source documents4 linked claims
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Aliases

medial orbitofrontal cortex to nucleus accumbens GRP/GRPR pathway, MO-Grp-NAc-Grpr circuit

Extracted Explainers

What the tool is doing

This paper presents the MO-to-NAc GRP/GRPR pathway as a circuit that regulates chronic pain and its affective dimensions. The abstract describes reduced GRP release and reduced excitability in this pathway during chronic pain.

Source 1DOIPubMed

Resources required

Interrogating this circuit in the paper required multimodal approaches including fiber photometry, chemogenetics, optogenetics, and Raman spectroscopy. The abstract also implies access to defined Grp and Grpr neuronal populations in mice.

Source 1DOIPubMed

What problem it solves

It helps explain how nociceptive and emotional processing are linked in chronic pain. The paper positions the circuit as a central integrator and therapeutic target.

Source 1DOIPubMed

What it does not solve

The abstract does not show that this circuit alone explains all chronic pain mechanisms or all affective comorbidities. It also does not provide implementation details for translation beyond mouse experiments.

Source 1DOIPubMed

Alternatives

The abstract contrasts inhibition or knockdown with activation or GRP supplementation as different ways to probe the same pathway. No alternative circuit tool is explicitly named in the abstract.

Source 1DOIPubMed

Evidence Snippets

These findings establish the MOGrp-NAcGrpr circuit as a central integrator and GRP/GRPR as a dual therapeutic target for chronic pain.
Evidence 1Source 1DOIPubMedprovenance

Supporting Sources

Linked Claims

Claim 1disease associated changesupports2025Source 1DOIPubMed

Chronic pain reduces excitability of NAc Grpr neurons and reduces MO-to-NAc GRP release.

Quoted textsource-backed
Using multimodal approaches (fiber photometry, chemogenetics, optogenetics, and Raman spectroscopy), we show that chronic pain reduces NAcGrpr neuron excitability and MO-to-NAc GRP release.
Claim 2mechanistic rolesupports2025Source 1DOIPubMed

The GRP/GRPR system in the medial orbitofrontal cortex to nucleus accumbens pathway is critical for regulating chronic pain and its affective dimensions.

Quoted textsource-backed
Here, we identify the gastrin-releasing peptide (GRP)/GRP receptor (GRPR) system in the medial orbitofrontal cortex (MO)-nucleus accumbens (NAc) pathway as critical for regulating chronic pain and its affective dimensions.
Claim 3therapeutic effectsupports2025Source 1DOIPubMed

Activation of MO Grp-to-NAc projections mirrors the therapeutic effects seen with NAc Grpr neuron activation or NAc GRP supplementation.

Quoted textsource-backed
MOGrp-to-NAc activation mirrors therapeutic effects.
Claim 4therapeutic effectsupports2025Source 1DOIPubMed

Optogenetic activation of NAc Grpr neurons or NAc GRP supplementation alleviates pain phenotypes in chronic pain mice.

Quoted textsource-backed
optogenetic activation of NAcGrpr neurons or NAc GRP supplementation alleviates these in chronic pain mice.