Evidence map›Paper›PMID 24558480›Full record

ArticlePloS one2014

The effects of a co-application of menthol and capsaicin on nociceptive behaviors of the rat on the operant orofacial pain assessment device.

Ethan M Anderson, Alan C Jenkins, Robert M Caudle, John K Neubert

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.6field-weighted citation impact, top 18% 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

16 citing papers in PubMed, 22 citations in OpenAlex.

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    Article
  3. The Role of TRP Channels in Sepsis and Colitis.International journal of molecular sciences · 2024
    Review
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  10. The orotrigeminal system.Handbook of clinical neurology · 2019
    Review
  11. Article
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  13. TRPM8 and Migraine.Headache · 2016
    Review
  14. Article
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  16. Review
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

4 authors at 2 institutions in 1 country.

Ethan M AndersonDepartment of Oral and Maxillofacial Surgery, University of Florida College of Dentistry, Gainesville, Florida, United States of America ; Department of Neuroscience, University of Florida College of Medicine, McKnight Brain Institute, Gainesville, Florida, United States of America.
Alan C JenkinsDepartment of Orthodontics, University of Florida, Gainesville, Florida, United States of America.
Robert M CaudleDepartment of Oral and Maxillofacial Surgery, University of Florida College of Dentistry, Gainesville, Florida, United States of America ; Department of Neuroscience, University of Florida College of Medicine, McKnight Brain Institute, Gainesville, Florida, United States of America.
John K NeubertDepartment of Orthodontics, University of Florida, Gainesville, Florida, United States of America.
University of Florida · USFlorida College · US

Funding

Operant Behavioral Instrument for Measuring Trigeminal Neuropathic Pain in RodentR44DA026220 · NIDA · STOELTING COMPANY · PI MILLS, RICHARD H, NEUBERT, JOHN K · 2010 to 2011
$1.1M
NIDA NIH HHS 5R44DA026220-03NIDA NIH HHS R44 DA026220
6 · The paper itself

Abstract

backgroundTransient receptor potential (TRP) cation channels are involved in the perception of hot and cold pain and are targets for pain relief in humans. We hypothesized that agonists of TRPV1 and TRPM8/TRPA1, capsaicin and menthol, would alter nociceptive behaviors in the rat, but their opposite effects on temperature detection would attenuate one another if combined.

methodsRats were tested on the Orofacial Pain Assessment Device (OPAD, Stoelting Co.) at three temperatures within a 17 min behavioral session (33°C, 21°C, 45°C).

resultsThe lick/face ratio (L/F: reward licking events divided by the number of stimulus contacts. Each time there is a licking event a contact is being made.) is a measure of nociception on the OPAD and this was equally reduced at 45°C and 21°C suggesting they are both nociceptive and/or aversive to rats. However, rats consumed (licks) equal amounts at 33°C and 21°C but less at 45°C suggesting that heat is more nociceptive than cold at these temperatures in the orofacial pain model. When menthol and capsaicin were applied alone they both induced nociceptive behaviors like lower L/F ratios and licks. When applied together though, the licks at 21°C were equal to those at 33°C and both were significantly higher than at 45°C.

conclusionsThis suggests that the cool temperature is less nociceptive when TRPM8/TRPA1 and TRPV1 are co-activated. These results suggest that co-activation of TRP channels can reduce certain nociceptive behaviors. These data demonstrate that the motivational aspects of nociception can be influenced selectively by TRP channel modulation and that certain aspects of pain can be dissociated and therefore targeted selectively in the clinic.

Indexed as

Analysis of VarianceAnimalsCapsaicinConditioning, OperantFacial PainMaleMentholNociceptionPain MeasurementRatsRats, Sprague-DawleyTemperatureTRPM Cation ChannelsTRPV Cation ChannelsCapsaicinMentholTrpm8 protein, ratTRPM Cation ChannelsTrpv1 protein, ratTRPV Cation Channels

Identifiers

PMID24558480
PMCPMC3928399
OpenAlexW1967827077

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.