Evidence map›Paper›PMID 28289947›Full record

ArticleCellular and molecular neurobiology2017

In vivo and In vitro Identification of Endocannabinoid Signaling in Periodontal Tissues and Their Potential Role in Local Pathophysiology.

Anna Konermann, Andreas Jäger, Stefanie A E Held, P Brossart, Anne Schmöle

Open access · greenAbstract read
In one paragraph

Article in Cellular and molecular neurobiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
1.9field-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

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 39 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Effects of cannabinoid receptor activation onJournal of periodontal & implant science · 2025
    Article
  5. Article
  6. Review
  7. Article
  8. Cannabinoids in Periodontology: Where Are We Now?Antibiotics (Basel, Switzerland) · 2023
    Review
  9. Review
  10. Molecules (Basel, Switzerland) · 2022
    Review
  11. Article
  12. Article
  13. Cannabidiol and periodontal inflammatory disease: A critical assessment.Biomedical papers of the Medical Faculty of the University Palacky, Olomouc, Czechoslovakia · 2022
    Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  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.

Anna KonermannDepartment of Orthodontics, Medical Faculty, University of Bonn, Bonn, Germany. anna.konermann@gmx.de.
Andreas JägerDepartment of Orthodontics, Medical Faculty, University of Bonn, Bonn, Germany.
Stefanie A E HeldDepartment of Oncology and Hematology, University of Bonn, Bonn, Germany.
P BrossartDepartment of Oncology and Hematology, University of Bonn, Bonn, Germany.
Anne SchmöleInstitute of Molecular Psychiatry, Medical Faculty, University of Bonn, Bonn, Germany.
University of Bonn · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The endocannabinoid system (ECS) with its binding receptors CB1 and CB2 impacts multiple pathophysiologies not only limited to neuronal psychoactivity. CB1 is assigned to cerebral neuron action, whereas CB2 is mainly expressed in different non-neuronal tissues and associated with immunosuppressive effects. Based on these tissue-selective CB receptor roles, it was the aim of this study to analyze potential expression in periodontal tissues under physiological conditions and inflammatory states. In vivo, CB receptor expression was investigated on human periodontal biopsies with or without bacterial inflammation and on rat maxillae with or without sterile inflammation. In vitro analyses were performed on human periodontal ligament (PDL) cells at rest or under mechanical strain via qRT-PCR, Western blot, and immunocytochemistry. P < 0.05 was set statistical significant. In vivo, CB1 expression was significantly higher in healthy PDL structures compared to CB2 (13.5% ± 1.3 of PDL tissues positively stained; 7.1% ± 0.9). Bacterial inflammation effected decrease in CB1 (9.7% ± 2.4), but increase in CB2 (14.7% ± 2.5). In contrast, sterile inflammation caused extensive CB1 (40% ± 1.9) and CB2 (41.7% ± 2.2) accumulations evenly distributed in the tooth surrounding PDL. In vitro, CB2 was ubiquitously expressed on gene and protein level. CB1 was constitutively expressed on transcriptional level (0.41% ± 0.09), even higher than CB2 (0.29% ± 0.06), but undetectable on protein level. Analyses further revealed expression changes of both receptors in mechanically loaded PDL cells. CB1 and CB2 are varyingly expressed in periodontal tissues, both adjusted by different entities of periodontal inflammation and by mechanical stress. This indicates potential ECS function as regulatory tool in controlling of periodontal pathophysiology.

Indexed as

AnimalsCells, CulturedEndocannabinoidsHumansPeriodontal LigamentPeriodontitisRatsReceptor, Cannabinoid, CB1Receptor, Cannabinoid, CB2Signal TransductionEndocannabinoidsReceptor, Cannabinoid, CB1Receptor, Cannabinoid, CB2Cannabinoid receptorsCB1CB2InflammationNeurotransmitterPeriodontal ligament cellsPeriodontal pathophysiology

Identifiers

PMID28289947
PMCPMC11482071
OpenAlexW2595992619

What OpenQuestion holds

Textmetadata
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.