Evidence map›Paper›PMID 12359623›Full record

ArticleBritish journal of pharmacology2002

Anandamide is a partial agonist at native vanilloid receptors in acutely isolated mouse trigeminal sensory neurons.

Louise A Roberts, MacDonald J Christie, Mark Connor

Open access · bronzeAbstract read
In one paragraph

Article in British journal of pharmacology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
4.1field-weighted citation impact, top 7% 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

34 citing papers in PubMed, 78 citations in OpenAlex.

  1. Review
  2. The analgesic paracetamol metabolite AM404 acts peripherally to directly inhibit sodium channels.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  12. Modulation of neuropathic-pain-related behaviour by the spinal endocannabinoid/endovanilloid system.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2012
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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

3 authors at 1 institution in 2 countries.

Louise A RobertsDepartment of Pharmacology, University of Sydney, Camperdown, 2006, NSW Australia.
MacDonald J Christie
Mark Connor
University of Sydney · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

1. The endogenous fatty acid anandamide (AEA) is a partial agonist at cannabinoid CB1 receptors and has been reported to be a full agonist at the recombinant vanilloid receptor, VR1. 2. Whole cell voltage clamp techniques were used to examine the efficacy of AEA and related analogues methanandamide and N-(4-hydroxyphenyl)-arachidonylamide (AM404) at native VR1 receptors in acutely isolated mouse trigeminal neurons. 3. Superfusion of the VR1 agonist capsaicin onto small trigeminal neurons voltage clamped at +40 mV produced outward currents in most cells, with a pEC(50) of 6.3+/-0.1 (maximum currents at 10-30 micro M). 4. AEA produced outward currents with a pEC(50) of 5.6+/-0.1. Maximal AEA currents (30-100 micro M) were 38+/-2% of the capsaicin maximum. AEA currents were blocked by the VR1 antagonist capsazepine (30 micro M), but unaffected by the CB1 antagonist SR141716A (1 micro M). 5. Methanandamide and AM404 were less potent than AEA at activating VR1. Methanandamide (100 micro M) produced currents 37+/-6% of the capsaicin maximum, the highest concentration of AM404 tested (100 micro M) produced currents that were 55+/-9% of the capsaicin maximum. 6. Capsazepine abolished the currents produced by AM404 (100 micro M) and strongly attenuated (>70%) those produced by methanandamide (100 micro M). 7. Co-superfusion of AEA (30 micro M, methanandamide (100 micro M) or AM404 (100 micro M) with capsaicin (3 micro M) resulted in a significant reduction of the capsaicin current. 8. These data indicate that AEA, methanandamide and AM404 activate native VR1 receptors, but that all three compounds are partial agonists when compared with capsaicin.

Indexed as

AnimalsArachidonic AcidsCannabinoidsDose-Response Relationship, DrugEndocannabinoidsMaleMiceMice, Inbred C57BLPolyunsaturated AlkamidesReceptors, DrugTrigeminal GanglionanandamideArachidonic AcidsCannabinoidsEndocannabinoidsPolyunsaturated AlkamidesReceptors, Drug

Identifiers

PMID12359623
PMCPMC1573524
OpenAlexW1997940254

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.