Evidence map›Paper›PMID 23820004›Full record

ArticlePain2013

TRPM8 is the principal mediator of menthol-induced analgesia of acute and inflammatory pain.

Boyi Liu, Lu Fan, Shrilatha Balakrishna, Aiwei Sui, John B Morris, Sven-Eric Jordt

Abstract read
In one paragraph

Article in Pain, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 172 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
172citing papers in PubMed, 3 pooled it
6.8field-weighted citation impact, top 2% 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

172 citing papers in PubMed, 3 syntheses or guidelines pooled it, 308 citations in OpenAlex.

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  17. Symmetry-driven gating of TRPM8 by PIPNature communications · 2026
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112 more citing papers are in PubMed but not listed here.

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 2 institutions in 1 country.

Boyi LiuDepartment of Pharmacology, Yale University School of Medicine, New Haven, CT, USA Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, CT, USA.
Lu Fan
Shrilatha Balakrishna
Aiwei Sui
John B Morris
Sven-Eric Jordt
Yale University · USUniversity of Connecticut · US

Funding

TRPA1 Channels Sensory Neurons Environmental IrritantsR01ES015056 · NIEHS · YALE UNIVERSITY · PI JORDT, SVEN-ERIC · 2006 to 2012
$2.8M
Counter-Irritation by Menthol: Molecular Targets and Role in Airway DiseaseR01HL105635 · NHLBI · YALE UNIVERSITY · PI JORDT, SVEN-ERIC, MORRIS, JOHN B · 2011 to 2014
$2.4M
NHLBI NIH HHS R01 HL105635NHLBI NIH HHS R01HL105635NHLBI NIH HHS R01HL105635-02S1NIEHS NIH HHS R01 ES015056
6 · The paper itself

Abstract

Menthol, the cooling natural product of peppermint, is widely used in medicinal preparations for the relief of acute and inflammatory pain in sports injuries, arthritis, and other painful conditions. Menthol induces the sensation of cooling by activating TRPM8, an ion channel in cold-sensitive peripheral sensory neurons. Recent studies identified additional targets of menthol, including the irritant receptor, TRPA1, voltage-gated ion channels and neurotransmitter receptors. It remains unclear which of these targets contribute to menthol-induced analgesia, or to the irritating side effects associated with menthol therapy. Here, we use genetic and pharmacological approaches in mice to probe the role of TRPM8 in analgesia induced by L-menthol, the predominant analgesic menthol isomer in medicinal preparations. L-menthol effectively diminished pain behavior elicited by chemical stimuli (capsaicin, acrolein, acetic acid), noxious heat, and inflammation (complete Freund's adjuvant). Genetic deletion of TRPM8 completely abolished analgesia by L-menthol in all these models, although other analgesics (acetaminophen) remained effective. Loss of L-menthol-induced analgesia was recapitulated in mice treated with a selective TRPM8 inhibitor, AMG2850. Selective activation of TRPM8 with WS-12, a menthol derivative that we characterized as a specific TRPM8 agonist in cultured sensory neurons and in vivo, also induced TRPM8-dependent analgesia of acute and inflammatory pain. L-menthol- and WS-12-induced analgesia was blocked by naloxone, suggesting activation of endogenous opioid-dependent analgesic pathways. Our data show that TRPM8 is the principal mediator of menthol-induced analgesia of acute and inflammatory pain. In contrast to menthol, selective TRPM8 agonists may produce analgesia more effectively, with diminished side effects.

Indexed as

Acute PainAnalgesiaAnimalsCells, CulturedInflammationMaleMentholMiceMice, Inbred C57BLMice, KnockoutPain MeasurementTRPM Cation ChannelsMentholTRPM8 protein, mouseTRPM Cation ChannelsAcetic acidAcroleinAnalgesiaCapsaicinHeatInflammatory painMentholTRPA1TRPM8TRPV1Visceral pain

Identifiers

PMID23820004
PMCPMC3778045
OpenAlexW1974195039

What OpenQuestion holds

Textmetadata
LicenceTDM
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.