Evidence map›Paper›PMID 15821751›Full record

ArticleBritish journal of pharmacology2005

The effects of Delta9-tetrahydrocannabinol in rat mesenteric vasculature, and its interactions with the endocannabinoid anandamide.

Saoirse E O'Sullivan, David A Kendall, Michael D Randall

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in British journal of pharmacology, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
3.2field-weighted citation impact, top 9% 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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 48 citations in OpenAlex.

  1. Pooled it
  2. Digital Replant Failure Following ΔPlastic and reconstructive surgery. Global open · 2026
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  4. Effects of ΔCannabis and cannabinoid research · 2024
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  5. The Effects of Cannabis: Implications for the Surgical Patient.Plastic and reconstructive surgery. Global open · 2021
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  6. Review
  7. Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Review
  13. Review
  14. Review
  15. TRPV1: on the road to pain relief.Current molecular pharmacology · 2008
    Review
  16. Review
  17. Article
  18. Novel cannabinoid receptors.British journal of pharmacology · 2007
    Review
  19. Article
  20. GPR55 and the vascular receptors for cannabinoids.British journal of pharmacology · 2007
    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

3 authors at 2 institutions in 1 country.

Saoirse E O'SullivanSchool of Biomedical Sciences, University of Nottingham, Queen's Medical Centre, Nottingham NG7 2UH. saoirse.o'sullivan@nottingham.ac.uk
David A Kendall
Michael D Randall
University of Nottingham · GBQueen's Medical Centre · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

1 Delta9-tetrahydrocannabinol (THC) produces varying effects in mesenteric arteries: vasorelaxation (third-order branches, G3), modest vasorelaxation (G2), no effect (G1) and vasoconstriction (the superior mesenteric artery, G0). 2 In G3, vasorelaxation to THC was inhibited by pertussis toxin, but was unaffected by the CB1 receptor antagonist, AM251 (1 microM), incubation with the TRPV1 receptor agonist capsaicin (10 microM, 1 h), the TRPV1 receptor antagonist capsazepine (10 microM) or de-endothelialisation. 3 In G3, vasorelaxation to THC was inhibited by high K+ buffer, and by the following K+ channel inhibitors: charybdotoxin (100 nM), apamin (500 nM) and barium chloride (30 microM), but not by 4-aminopyridine, glibenclamide or tertiapin. 4 In G3, THC (10 and 100 microM) inhibited the contractile response to Ca2+ in a Ca2+-free, high potassium buffer, indicating that THC blocks Ca2+ influx. 5 In G0, the vasoconstrictor responses to THC were inhibited by de-endothelialisation and SR141716A (100 nM), but not by the endothelin (ET(A)) receptor antagonist FR139317 (1 microM).THC (1 and 10 microM) antagonised vasorelaxation to anandamide in G3 but not G0. THC did not antagonise the noncannabinoid verapamil, capsaicin or the CB1 receptor agonist CP55,940. 6 THC (10 and 100 microM) inhibited endothelium-derived relaxing factor (EDHF)-mediated responses to carbachol in a manner similar to the gap junction inhibitor 18alpha-glycyrrhetinic acid. 7 These data show that THC causes vasorelaxation through activation of K+ channels and inhibition of Ca2+ channels, and this involves non-CB1, non-TRPV1 but G-protein-coupled receptors. In G0, THC does not cause relaxation and at high concentrations causes contractions. Importantly, THC antagonises the effects of anandamide, possibly through inhibition of EDHF activity.

Indexed as

AnimalsApaminArachidonic AcidsAzepinesBarium CompoundsBiological FactorsCalciumCannabinoid Receptor ModulatorsCapsaicinCharybdotoxinChloridesCyclohexanolsDose-Response Relationship, DrugDronabinolDrug InteractionsEndocannabinoids3-(2-hydroxy-4-(1,1-dimethylheptyl)phenyl)-4-(3-hydroxypropyl)cyclohexanolAM 251anandamideApaminArachidonic AcidsAzepinesbarium chlorideBarium CompoundsBiological FactorsCalciumCannabinoid Receptor ModulatorsCapsaicincapsazepineCharybdotoxinChloridesCyclohexanolsDronabinolEndocannabinoidsendothelium-dependent hyperpolarization factorFR 139317IndolesPertussis ToxinPiperidinesPolyunsaturated AlkamidesPotassium Channel BlockersPotassium ChannelsPyrazolesRimonabantVerapamil

Identifiers

PMID15821751
PMCPMC1576168
OpenAlexW1527708541

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.