Evidence map›Paper›PMID 21813113›Full record

ArticleBrain research2011

Activation of spinal and supraspinal cannabinoid-1 receptors leads to antinociception in a rat model of neuropathic spinal cord injury pain.

Aldric Hama, Jacqueline Sagen

Abstract read
In one paragraph

Article in Brain research, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
5.2field-weighted citation impact, top 5% 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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 56 citations in OpenAlex.

  1. Pooled it
  2. Comparison of the analgesic effects of dronabinol and smoked marijuana in daily marijuana smokers.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2013
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  4. The endocannabinoid system regulates both ependymoglial and neuronal cell responses to a tail amputation in the axolotl.Developmental dynamics : an official publication of the American Association of Anatomists · 2026
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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

2 authors at 1 institution in 1 country.

Aldric HamaThe Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL 33136, USA. hama2000_99@yahoo.com
Jacqueline Sagen
University of Miami · US

Funding

TRANSLATIONAL MODEL FOR NOVEL THERAPEUTICS IN SPINAL CORD INJURY PAINR21NS061172 · NINDS · UNIVERSITY OF MIAMI SCHOOL OF MEDICINE · PI SAGEN, JACQUELINE · 2007 to 2008
$359k
NINDS NIH HHS NS61172NINDS NIH HHS R21 NS061172
6 · The paper itself

Abstract

Activation of CNS cannabinoid subtype-1 (CB1) receptors has been shown to mediate the antinociceptive and other effects of systemically administered CB receptor agonists. The endogenous peptide CB receptor ligand hemopressin (HE) has previously demonstrated an antinociceptive effect in rats with a hind paw inflammation, without exhibiting characteristic CB1 receptor-mediated side-effects. The current study evaluated the effect of intrathecal (i.t.) and intracerebroventricular (i.c.v.) injection of HE in a rat model of neuropathic spinal cord injury (SCI) pain. The non-subtype selective CB receptor agonist WIN 55,212-2 was also centrally administered in SCI rats as a comparator. Four weeks following an acute compression of the mid-thoracic spinal cord, rats displayed markedly decreased hind paw withdrawal thresholds, indicative of below-level neuropathic pain. Central administration of WIN 55,212-2 significantly increased withdrawal thresholds, whereas HE did not. Hemopressin has been reported to block CB1 receptors in vitro, similar to the CB1 receptor antagonist rimonabant. Pretreatment with rimonabant completely blocked the antinociceptive effect of centrally administered WIN 55,212-2, but pretreatment with HE did not. While the data confirm that activation of either supraspinal or spinal CB1 receptors leads to significant antinociception in SCI rats, the current data do not support an antinociceptive effect from an acute blockade of central CB1 receptors, HE's putative antinociceptive mechanism, in neuropathic SCI rats. Although such a mechanism could be useful in other models of pain with a significant inflammatory component, the current data indicate that activation of CB1 receptors is needed to ameliorate neuropathic SCI pain.

Indexed as

AnalgesiaAnalgesicsAnimalsBenzoxazinesCannabinoidsDisease Models, AnimalHemoglobinsHyperalgesiaMaleMorpholinesNaphthalenesNeuralgiaPain MeasurementPeptide FragmentsPhysical StimulationRats(3R)-((2,3-dihydro-5-methyl-3-((4-morpholinyl)methyl)pyrrolo-(1,2,3-de)-1,4-benzoxazin-6-yl)(1-naphthalenyl))methanoneAnalgesicsBenzoxazinesCannabinoidsHemoglobinshemopressinMorpholinesNaphthalenesPeptide FragmentsReceptor, Cannabinoid, CB1

Identifiers

PMID21813113
PMCPMC3159760
OpenAlexW2139081697

What OpenQuestion holds

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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.