Intrathecal semaglutide attenuates burn injury-induced pain in mice through a spinal GLP-1R-linked enkephalin/δ-opioid receptor pathway
- Design
- Animal study · Unknown outcome
- Match to healthy normal-weight adults aged 55–75
- Not human evidence[Auto] Non-human (animal or cellular) evidence; no direct inference to any human population.
- Could weight loss explain it?
- Unknown[Auto] Non-human study; weight-loss mediation not assessable.
- Study tier
- Study tier 4[Auto] Preclinical evidence; not clinical evidence for any human population.
- Assessment
- Version 1 · automatic, not yet reviewed by a person · Sep 13, 2026
Study facts come from the paper. Population match, weight-loss explanation and study tier are our judgments, made against the reference group of healthy normal-weight adults aged 55–75.
[Auto, unreviewed; last sentences of abstract] Moreover, enkephalin neutralization and DOR antagonism attenuated semaglutide-induced antinociception. Together, these findings support a functional spinal enkephalin/DOR pathway linked to intrathecal semaglutide treatment and consistent with GLP-1R involvement in BIP.
01Findings
What the study reported
- Drugs
- Semaglutide
- Primary outcome
- Not extracted
- Effect
- Not extracted
- 95% confidence interval
- Not extracted
- Follow-up
- Not stated
- Adverse events
- Not extracted
- Limitations
- Auto-classified from abstract only; effect estimates, adverse events and limitations not extracted. Requires manual review.
Who was studied
Study quality details
- Study design
- Preclinical (animal)
- Sample size
- not extracted
- Randomization
- no
- Blinding
- not stated
- Comparator
- not stated
- Follow up duration
- not stated
- Outcome type
- unknown
- Replication
- not assessed (auto)
- Consistency with other evidence
- not assessed (auto)
- Population applicability
- VERY_INDIRECT
- Statistical precision
- not extracted
- Risk of bias
- not assessed (auto)
- Funding conflicts
- unclear
- Peer review status
- yes
02Funding
Funding and conflicts
- Funding
- not reported in abstract
- Industry funded
- Unclear
- Manufacturer
- None identified
- Sponsor role
- not reported in abstract
- Author conflicts
- Declaration of competing interests The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
- Independent replication
- unknown
Funding is shown on every study and never used to score it.
04Source
The source, as retrieved
Abstract
Burn injury-induced pain (BIP) is a complex condition whose spinal mechanisms remain incompletely understood. Although spinal glucagon-like peptide-1 receptor (GLP-1R) signaling has been implicated in pain modulation, its contribution to BIP remains unclear. Using a mouse model of second-degree burn injury, we characterized nociceptive behaviors, spinal glial responses, and the temporal and cellular distribution of GLP-1R using immunoblotting, immunofluorescence, and RNAscope in situ hybridization. We then evaluated the antinociceptive effects of intrathecal semaglutide, their sensitivity to pharmacological GLP-1R antagonism, and the functional contribution of endogenous enkephalin/δ-opioid receptor (DOR) signaling. Burn injury increased spinal GLP-1R expression during the peak phase of pain hypersensitivity. GLP-1R immunoreactivity and Glp1r transcripts showed a substantial association with GFAP-positive astrocytic profiles, while detectable signals were also present in microglia and neurons. Intrathecal semaglutide attenuated mechanical allodynia and thermal hyperalgesia, and these effects were reduced by pharmacological GLP-1R antagonism. Acute semaglutide responsiveness was also observed in female mice. Semaglutide increased spinal Penk mRNA and enkephalin immunoreactivity in vivo and increased Penk expression and extracellular enkephalin levels in primary spinal astrocyte-enriched cultures. In spinal tissue, enkephalin immunoreactivity was more frequently associated with GFAP-positive profiles than with Iba1-or NeuN-positive profiles. Moreover, enkephalin neutralization and DOR antagonism attenuated semaglutide-induced antinociception. Together, these findings support a functional spinal enkephalin/DOR pathway linked to intrathecal semaglutide treatment and consistent with GLP-1R involvement in BIP.
Where this record came from
| Source | Retrieved | Identifier |
|---|---|---|
| pubmed | Sep 13, 2026 | 42669356 first ingestion |