Evidence map›Paper›PMID 22901764›Full record

ArticleThe journal of pain2012

Spinal cannabinoid receptor type 2 agonist reduces mechanical allodynia and induces mitogen-activated protein kinase phosphatases in a rat model of neuropathic pain.

Russell P Landry, Elena Martinez, Joyce A DeLeo, E Alfonso Romero-Sandoval

Open access · bronzeAbstract read
In one paragraph

Article in The journal of pain, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
2.4field-weighted citation impact, top 12% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed, 51 citations in OpenAlex.

  1. Article
  2. Cannabinoid CBBritish journal of pharmacology · 2025
    Review
  3. Article
  4. Review
  5. Article
  6. Microglial Cannabinoid CBInternational journal of molecular sciences · 2023
    Review
  7. Article
  8. Article
  9. Article
  10. CB2 Receptor in Microglia: The Guardian of Self-Control.International journal of molecular sciences · 2020
    Review
  11. Article
  12. Article
  13. Dual-Specificity Phosphatase Regulation in Neurons and Glial Cells.International journal of molecular sciences · 2019
    Review
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 1 institution in 1 country.

Russell P LandryDartmouth Medical School, Department of Anesthesiology, Lebanon, New Hampshire, USA.
Elena Martinez
Joyce A DeLeo
E Alfonso Romero-Sandoval
Dartmouth College · US

Funding

Alternatives to Opioids for Chronic Pain: Part IVR01DA011276 · NIDA · DARTMOUTH COLLEGE · PI DE LEO, JOYCE A · 1997 to 2010
$3.1M
Cannabinoids and Neuroimmune InteractionsR01DA025211 · NIDA · DARTMOUTH COLLEGE · PI ROMERO-SANDOVAL, E. ALFONSO · 2009 to 2010
$711k
NIDA NIH HHS DA025211NIDA NIH HHS DA11276NIDA NIH HHS R01 DA011276NIDA NIH HHS R01 DA025211
6 · The paper itself

Abstract

unlabelledPeripheral nerve injury generally results in spinal neuronal and glial plastic changes associated with chronic behavioral hypersensitivity. Spinal mitogen-activated protein kinases (MAPKs), eg, p38 or extracellular signal-regulated kinases (ERKs), are instrumental in the development of chronic allodynia in rodents, and new p38 inhibitors have shown potential in acute and neuropathic pain patients. We have previously shown that the cannabinoid type 2 receptor agonist JWH015 inhibits ERK activity by inducing MAPK phosphatase (MKP)-1 and MKP-3 (the major regulators of MAPKs) in vitro in microglial cells. Therefore, we decided to investigate the role of these phosphatases in the mechanisms of action of JWH015 in vivo using the rat L5 nerve transection model of neuropathic pain. We observed that peripheral nerve injury reduced spinal MKP-1/3 expression and activity and that intrathecal JWH015 reduced established L5 nerve injury-induced allodynia, enhanced spinal MKP-1/3 expression and activity, and reduced the phosphorylated form of p38 and ERK-1/2. Triptolide, a pharmacological blocker of MKP-1 and MKP-3 expression, inhibited JWH015's effects, suggesting that JWH015 exerts its antinociceptive effects by modulating MKP-1 and MKP-3. JWH015-induced antinociception and MKP-1 and MKP-3 expression were inhibited by the cannabinoid type 2 receptor antagonist AM630. Our data suggest that MKP-1 and MKP-3 are potential targets for novel analgesic drugs. PERSPECTIVE: MAPKs are pivotal in the development of chronic allodynia in rodent models of neuropathic pain. A cannabinoid type 2 receptor agonist, JWH015, reduced neuropathic allodynia in rats by reducing MAPK phosphorylation and inducing spinal MAPK phosphatases 1 and 3, the major regulators of MAPKs.

Indexed as

Hyperalgesia4-NitrophenylphosphataseAnimalsDisease Models, AnimalDiterpenesDual Specificity Phosphatase 1Dual Specificity Phosphatase 6Epoxy CompoundsGene Expression RegulationImmunosuppressive AgentsIndolesMaleMitogen-Activated Protein Kinase PhosphatasesNerve Tissue ProteinsNeuralgiaPhenanthrenes4-NitrophenylphosphataseDiterpenesDual Specificity Phosphatase 1Dual Specificity Phosphatase 6Dusp1 protein, ratDusp6 protein, ratEpoxy CompoundsImmunosuppressive AgentsIndolesiodopravadolineJHW 015Mitogen-Activated Protein Kinase PhosphatasesNerve Tissue ProteinsPhenanthrenesReceptor, Cannabinoid, CB2triptolide

Identifiers

PMID22901764
PMCPMC3438333
OpenAlexW1967248406

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.