Evidence map›Paper›PMID 29145497›Full record

ArticlePloS one2017

Rare genetic variants in the endocannabinoid system genes CNR1 and DAGLA are associated with neurological phenotypes in humans.

Douglas R Smith, Christine M Stanley, Theodore Foss, Richard G Boles, Kevin McKernan

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
4.8field-weighted citation impact, top 4% 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

36 citing papers in PubMed, 77 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Research Review: What we have learned about the endocannabinoid system in developmental psychopathology.Journal of child psychology and psychiatry, and allied disciplines · 2025
    Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Cannabinoids: Role in Neurological Diseases and Psychiatric Disorders.International journal of molecular sciences · 2024
    Review
  10. Article
  11. Article
  12. Anandamide and 2-arachidonoylglycerol differentially modulate autistic-like traits in a genetic model of autism based on FMR1 deletion in rats.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2023
    Article
  13. Review
  14. Article
  15. Article
  16. Blood RNA Sequencing Indicates UpregulatedInternational journal of molecular sciences · 2022
    Article
  17. Review
  18. Review
  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

5 authors at 1 institution in 1 country.

Douglas R SmithCourtagen Life Sciences, Inc., Woburn, MA, United States of America.ORCID http://orcid.org/0000-0002-0401-7382
Christine M StanleyCourtagen Life Sciences, Inc., Woburn, MA, United States of America.
Theodore FossCourtagen Life Sciences, Inc., Woburn, MA, United States of America.
Richard G BolesCourtagen Life Sciences, Inc., Woburn, MA, United States of America.
Kevin McKernanCourtagen Life Sciences, Inc., Woburn, MA, United States of America.
Courtagen Life Sciences (United States) · US

Funding

PILOT STUDY--SUBSTRATE METABOLISM IN EXTREMELY LOW BIRTH WEIGHT INFANTSP30DK048520 · NIDDK · UNIVERSITY OF COLORADO DENVER · PI JANINE A HIGGINS · 1995 to 2026
$32.6M
6 · The paper itself

Abstract

Rare genetic variants in the core endocannabinoid system genes CNR1, CNR2, DAGLA, MGLL and FAAH were identified in molecular testing data from 6,032 patients with a broad spectrum of neurological disorders. The variants were evaluated for association with phenotypes similar to those observed in the orthologous gene knockouts in mice. Heterozygous rare coding variants in CNR1, which encodes the type 1 cannabinoid receptor (CB1), were found to be significantly associated with pain sensitivity (especially migraine), sleep and memory disorders-alone or in combination with anxiety-compared to a set of controls without such CNR1 variants. Similarly, heterozygous rare variants in DAGLA, which encodes diacylglycerol lipase alpha, were found to be significantly associated with seizures and neurodevelopmental disorders, including autism and abnormalities of brain morphology, compared to controls. Rare variants in MGLL, FAAH and CNR2 were not associated with any neurological phenotypes in the patients tested. Diacylglycerol lipase alpha synthesizes the endocannabinoid 2-AG in the brain, which interacts with CB1 receptors. The phenotypes associated with rare CNR1 variants are reminiscent of those implicated in the theory of clinical endocannabinoid deficiency syndrome. The severe phenotypes associated with rare DAGLA variants underscore the critical role of rapid 2-AG synthesis and the endocannabinoid system in regulating neurological function and development. Mapping of the variants to the 3D structure of the type 1 cannabinoid receptor, or primary structure of diacylglycerol lipase alpha, reveals clustering of variants in certain structural regions and is consistent with impacts to function.

Indexed as

EndocannabinoidsHumansLipoprotein LipaseNervous System DiseasesPhenotypeReceptor, Cannabinoid, CB1CNR1 protein, humanDAGLA protein, humanEndocannabinoidsLipoprotein LipaseReceptor, Cannabinoid, CB1

Identifiers

PMID29145497
PMCPMC5690672
OpenAlexW2949998815

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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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.