Evidence map›Paper›PMID 20722027›Full record

ArticleArthritis and rheumatism2010

Tonic modulation of spinal hyperexcitability by the endocannabinoid receptor system in a rat model of osteoarthritis pain.

Devi Rani Sagar, Lydia E Staniaszek, Bright N Okine, Stephen Woodhams, Leonie M Norris, Richard G Pearson, Michael J Garle, Stephen P H Alexander, Andrew J Bennett, David A Barrett and 3 more

Open access · bronzeAbstract read
In one paragraph

Article in Arthritis and rheumatism, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
70citing papers in PubMed, 3 pooled it
7.5field-weighted citation impact, top 3% 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

70 citing papers in PubMed, 3 syntheses or guidelines pooled it, 119 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Biological aspects of early osteoarthritis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2012
    Pooled it
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  18. NF-κB Phosphorylation Inhibition Prevents Articular Cartilage Degradation in Osteoarthritis Rats via 2-Aminoquinoline.Medical science monitor : international medical journal of experimental and clinical research · 2020
    Article
  19. Article
  20. Article

10 more citing papers are in PubMed but not listed here.

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

13 authors at 1 institution in 1 country.

Devi Rani SagarUniversity of Nottingham and Queen's Medical Centre, Nottingham, UK. devi.sagar@nottingham.ac.uk
Lydia E Staniaszek
Bright N Okine
Stephen Woodhams
Leonie M Norris
Richard G Pearson
Michael J Garle
Stephen P H Alexander
Andrew J Bennett
David A Barrett
David A Kendall
Brigitte E Scammell
Victoria Chapman
University of Nottingham · GB

Funding

Medical Research CouncilWellcome Trust 078773/Z/05/Z
6 · The paper itself

Abstract

objectiveTo investigate the impact of an experimental model of osteoarthritis (OA) on spinal nociceptive processing and the role of the inhibitory endocannabinoid system in regulating sensory processing at the spinal level.

methodsExperimental OA was induced in rats by intraarticular injection of sodium mono-iodoacetate (MIA), and the development of pain behavior was assessed. Extracellular single-unit recordings of wide dynamic range (WDR) neurons in the dorsal horn were obtained in MIA-treated rats and saline-treated rats. The levels of endocannabinoids and the protein and messenger RNA levels of the main synthetic enzymes for the endocannabinoids (N-acyl phosphatidylethanolamine phospholipase D [NAPE-PLD] and diacylglycerol lipase α [DAGLα]) in the spinal cord were measured.

resultsLow-weight (10 gm) mechanically evoked responses of WDR neurons were significantly (P < 0.05) facilitated 28 days after MIA injection compared with the responses in saline-treated rats, and spinal cord levels of anandamide and 2-arachidonoyl glycerol (2-AG) were increased in MIA-treated rats. Protein levels of NAPE-PLD and DAGLα, which synthesize anandamide and 2-AG, respectively, were elevated in the spinal cords of MIA-treated rats. The functional role of endocannabinoids in the spinal cords of MIA-treated rats was increased via activation of cannabinoid 1 (CB(1) ) and CB(2) receptors, and blockade of the catabolism of anandamide had significantly greater inhibitory effects in MIA-treated rats compared with control rats.

conclusionOur findings provide new evidence for altered spinal nociceptive processing indicative of central sensitization and for adaptive changes in the spinal cord endocannabinoid system in an experimental model of OA. The novel control of spinal cord neuronal responses by spinal cord CB(2) receptors suggests that this receptor system may be an important target for the modulation of pain in OA.

Indexed as

EndocannabinoidsAnimalsArachidonic AcidsCannabinoid Receptor ModulatorsDisease Models, AnimalGlyceridesIodoacetatesLipoprotein LipaseMaleNeuronsOsteoarthritisPainPolyunsaturated AlkamidesRatsRats, Sprague-DawleyReceptor, Cannabinoid, CB1anandamideArachidonic AcidsCannabinoid Receptor ModulatorsEndocannabinoidsGlyceridesglyceryl 2-arachidonateIodoacetatesLipoprotein LipasePolyunsaturated AlkamidesReceptor, Cannabinoid, CB1Receptor, Cannabinoid, CB2

Identifiers

PMID20722027
PMCPMC3132591
OpenAlexW2147361891

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.