Evidence map›Paper›PMID 32978469›Full record

ArticleScientific reports2020

Cannabinoids affect the mouse visual acuity via the cannabinoid receptor type 2.

Bruno Cécyre, Ismaël Bachand, François Papineau, Chloé Brochu, Christian Casanova, Jean-François Bouchard

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.7field-weighted citation impact, top 16% 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

10 citing papers in PubMed, 15 citations in OpenAlex.

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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

6 authors at 1 institution in 1 country.

Bruno CécyreLaboratoire de Neuropharmacologie, École d'optométrie, Université de Montréal, Succursale Centre-Ville, C.P. 6128, Montréal, Québec, H3C 3J7, Canada.
Ismaël BachandLaboratoire de Neuropharmacologie, École d'optométrie, Université de Montréal, Succursale Centre-Ville, C.P. 6128, Montréal, Québec, H3C 3J7, Canada.
François PapineauLaboratoire de Neuropharmacologie, École d'optométrie, Université de Montréal, Succursale Centre-Ville, C.P. 6128, Montréal, Québec, H3C 3J7, Canada.
Chloé BrochuLaboratoire de Neuropharmacologie, École d'optométrie, Université de Montréal, Succursale Centre-Ville, C.P. 6128, Montréal, Québec, H3C 3J7, Canada.
Christian CasanovaLaboratoire des Neurosciences de la Vision, École d'optométrie, Université de Montréal, Montréal, Québec, Canada.
Jean-François BouchardLaboratoire de Neuropharmacologie, École d'optométrie, Université de Montréal, Succursale Centre-Ville, C.P. 6128, Montréal, Québec, H3C 3J7, Canada. jean-francois.bouchard@umontreal.ca.
Université de Montréal · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Recently, there have been increasing indications that the endocannabinoid (eCB) system is involved in vision. Multiple research teams studied the cannabinoid receptor type 2 (CB2R) expression and function in the mouse retina. Here, we examined the consequence of CB2R modulation on visual acuity using genetic and pharmacologic tools. We found that Cnr2 knockout mice show an enhanced visual acuity, CB2R activation decreased visual acuity while CB2R blockade with the inverse agonist AM630 increased it. The inhibition of 2-arachidonylglycerol (2-AG) synthesis and degradation also greatly increased and decreased visual acuity, respectively. No differences were seen when the cannabinoid receptor type 1 (CB1R) was deleted, blocked or activated implying that CB2R exclusively mediates cannabinoid modulation of the visual acuity. We also investigated the role of cannabinoids in retinal function using electroretinography (ERG). We found that modulating 2-AG levels affected many ERG components, such as the a-wave and oscillatory potentials (OPs), suggesting an impact on cones and amacrine cells. Taken together, these results reveal that CB2R modulates visual acuity and that eCBs such as 2-AG can modulate both visual acuity and retinal sensitivity. Finally, these findings establish that CB2R is present in visual areas and regulates vision-related functions.

Indexed as

Amacrine CellsAnimalsCannabinoidsFemaleMaleMiceMice, Inbred C57BLMice, KnockoutReceptor, Cannabinoid, CB1Receptor, Cannabinoid, CB2RetinaRetinal Cone Photoreceptor CellsVisual AcuityCannabinoidsCNR1 protein, mouseCnr2 protein, mouseReceptor, Cannabinoid, CB1Receptor, Cannabinoid, CB2

Identifiers

PMID32978469
PMCPMC7519129
OpenAlexW3088186339

What Socratic 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 Socratic graph.