Evidence map›Paper›PMID 34775970›Full record

ArticleMolecular brain2021

The terpenes camphene and alpha-bisabolol inhibit inflammatory and neuropathic pain via Cav3.2 T-type calcium channels.

Vinicius M Gadotti, Sun Huang, Gerald W Zamponi

Open access · goldAbstract read
In one paragraph

Article in Molecular brain, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
3.1field-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

18 citing papers in PubMed, 38 citations in OpenAlex.

  1. Review
  2. The psychoactive cannabinoid THC inhibits peripheral nociceptors by targeting NaNeuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Regulatory Action of Calcium and Calcium Channels in Pain Pathways.International journal of biological sciences · 2025
    Review
  7. Article
  8. A Comparison between BulgarianMolecules (Basel, Switzerland) · 2024
    Article
  9. Article
  10. Terpenes inInternational journal of molecular sciences · 2023
    Article
  11. Review
  12. Article
  13. Article
  14. Review
  15. Review
  16. Review
  17. Review
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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 1 country.

Vinicius M Gadotti *Department of Physiology and Pharmacology, Hotchkiss Brain Institute, Alberta Children's Hospital Research Institute, University of Calgary, AB, T2N 4N1, Calgary, Canada.
Sun Huang *Department of Physiology and Pharmacology, Hotchkiss Brain Institute, Alberta Children's Hospital Research Institute, University of Calgary, AB, T2N 4N1, Calgary, Canada.
Gerald W ZamponiDepartment of Physiology and Pharmacology, Hotchkiss Brain Institute, Alberta Children's Hospital Research Institute, University of Calgary, AB, T2N 4N1, Calgary, Canada. zamponi@ucalgary.ca.ORCID 0000-0002-0644-9066
University of Calgary · CA

Funding

CIHR
6 · The paper itself

Abstract

T-type calcium channels are known molecular targets of certain phytocannabinoids and endocannabinoids. Here we explored the modulation of Cav3.2 T-type calcium channels by terpenes derived from cannabis plants. A screen of eight commercially available terpenes revealed that camphene and alpha-bisabolol mediated partial, but significant inhibition of Cav3.2 channels expressed in tsA-201 cells, as well as native T-type channels in mouse dorsal root ganglion neurons. Both compounds inhibited peak current amplitude with IC50s in the low micromolar range, and mediated an additional small hyperpolarizing shift in half-inactivation voltage. When delivered intrathecally, both terpenes inhibited nocifensive responses in mice that had received an intraplantar injection of formalin, with alpha-bisabolol showing greater efficacy. Both terpenes reduced thermal hyperalgesia in mice injected with Complete Freund's adjuvant. This effect was independent of sex, and absent in Cav3.2 null mice, indicating that these compounds mediate their analgesic properties by acting on Cav3.2 channels. Both compounds also inhibited mechanical hypersensitivity in a mouse model of neuropathic pain. Hence, camphene and alpha-bisabolol have a wide spectrum of analgesic action by virtue of inhibiting Cav3.2 T-type calcium channels.

Indexed as

Calcium Channels, T-TypeNeuralgiaAnimalsBicyclic MonoterpenesHyperalgesiaMiceMonocyclic SesquiterpenesTerpenesBicyclic MonoterpenesbisabololCalcium Channels, T-TypeMonocyclic SesquiterpenesTerpenesBisabololCalcium channelsCampheneCannabisPainTerpenesT-type

Identifiers

PMID34775970
PMCPMC8591808
OpenAlexW3212895079

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.