Evidence map›Paper›PMID 19408320›Full record

ArticleInflammatory bowel diseases2009

Activation of the cannabinoid 2 receptor (CB2) protects against experimental colitis.

Martin A Storr, Catherine M Keenan, Hong Zhang, Kamala D Patel, Alexandros Makriyannis, Keith A Sharkey

Open access · hybridAbstract read
In one paragraph

Article in Inflammatory bowel diseases, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 103 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
103citing papers in PubMed, 2 pooled it
9.7field-weighted citation impact, top 2% 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

103 citing papers in PubMed, 2 syntheses or guidelines pooled it, 179 citations in OpenAlex.

  1. Pooled it
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  10. The Impact of the CBMolecules (Basel, Switzerland) · 2024
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43 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

6 authors at 2 institutions in 2 countries.

Martin A StorrDivision of Gastroenterology, Department of Medicine and Snyder Institute of Infection, Immunity & Inflammation, University Calgary, Calgary, Alberta, Canada. mstorr@ucalgary.ca
Catherine M Keenan
Hong Zhang
Kamala D Patel
Alexandros Makriyannis
Keith A Sharkey
Institute of Infection and Immunity · CANortheastern University · US

Funding

Project 3 - In vivo pharmacology of cannabinoid receptor probesP01DA009158 · NIDA · UNIVERSITY OF CONNECTICUT STORRS · PI Alexandros Makriyannis · 1994 to 2026
$26.0M
NIDA NIH HHS P01 DA009158
6 · The paper itself

Abstract

backgroundActivation of cannabinoid (CB)(1) receptors results in attenuation of experimental colitis. Our aim was to examine the role of CB(2) receptors in experimental colitis using agonists (JWH133, AM1241) and an antagonist (AM630) in trinitrobenzene sulfonic acid (TNBS)-induced colitis in wildtype and CB(2) receptor-deficient (CB(2) (-/-)) mice.

methodsMice were treated with TNBS to induce colitis and then given intraperitoneal injections of the CB(2) receptor agonists JWH133, AM1241, or the CB(2) receptor antagonist AM630. Additionally, CB(2) (-/-) mice were treated with TNBS and injected with JWH133 or AM1241. Animals were examined 3 days after the induction of colitis. The colons were removed for macroscopic and microscopic evaluation, as well as the determination of myeloperoxidase activity. Quantitative reverse-transcriptase polymerase chain reaction (RT-PCR) for CB(2) receptor was also performed in animals with TNBS and dextran sodium sulfate colitis.

resultsIntracolonic installation of TNBS caused severe colitis. CB(2) mRNA expression was significantly increased during the course of experimental colitis. Three-day treatment with JWH133 or AM1241 significantly reduced colitis; AM630 exacerbated colitis. The effect of JWH133 was abolished when animals were pretreated with AM630. Neither JWH133 nor AM1241 had effects in CB(2) (-/-) mice.

conclusionsWe show that activation of the CB(2) receptor protects against experimental colitis in mice. Increased expression of CB(2) receptor mRNA and aggravation of colitis by AM630 suggests a role for this receptor in normally limiting the development of colitis. These results support the idea that the CB(2) receptor may be a possible novel therapeutic target in inflammatory bowel disease.

Indexed as

AnimalsCannabinoidsColitisDisease Models, AnimalFemaleGene ExpressionIndolesInflammatory Bowel DiseasesMaleMiceMice, Inbred C57BLMice, Mutant StrainsReceptor, Cannabinoid, CB21,1-dimethylbutyl-1-deoxy-Delta(9)-THCAM 1241CannabinoidsIndolesiodopravadolineReceptor, Cannabinoid, CB2

Identifiers

PMID19408320
PMCPMC5531765
OpenAlexW2021681296

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.