Evidence map›Paper›PMID 21108630›Full record

ArticleBritish journal of pharmacology2011

Stereo-selective inhibition of transient receptor potential TRPC5 cation channels by neuroactive steroids.

Y Majeed, M S Amer, A K Agarwal, L McKeown, K E Porter, D J O'Regan, J Naylor, C W G Fishwick, K Muraki, D J Beech

Open access · bronzeAbstract read
In one paragraph

Article in British journal of pharmacology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
1.5field-weighted citation impact, top 21% 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

24 citing papers in PubMed, 55 citations in OpenAlex.

  1. Therapeutic potential of transient receptor potential (TRP) channels in psychiatric disorders.Journal of neural transmission (Vienna, Austria : 1996) · 2024
    Review
  2. Review
  3. Article
  4. Article
  5. Review
  6. Aging, hormones and receptors.Physiological research · 2020
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Endothelial CaInternational journal of molecular sciences · 2018
    Review
  16. Review
  17. Review
  18. Article
  19. Review
  20. 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

10 authors at 2 institutions in 3 countries.

Y MajeedMultidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, UK.
M S Amer
A K Agarwal
L McKeown
K E Porter
D J O'Regan
J Naylor
C W G Fishwick
K Muraki
D J Beech
University of Leeds · GBLeeds General Infirmary · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

background and purposeTransient receptor potential canonical 5 (TRPC5) channels are widely expressed, including in the CNS, where they potentiate fear responses. They also contribute to other non-selective cation channels that are stimulated by G-protein-coupled receptor agonists and lipid and redox factors. Steroids are known to modulate fear and anxiety states, and we therefore investigated whether TRPC5 exhibited sensitivity to steroids. EXPERIMENTAL APPROACH: Human TRPC5 channels were conditionally expressed in HEK293 cells and studied using intracellular Ca2+ measurement, whole-cell voltage-clamp and excised patch techniques. For comparison, control experiments were performed with cells lacking TRPC5 channels or expressing another TRP channel, TRPM2. Native TRPC channel activity was recorded from vascular smooth muscle cells. KEY

resultsExtracellular application of pregnenolone sulphate, pregnanolone sulphate, pregnanolone, progesterone or dihydrotestosterone inhibited TRPC5 activity within 1-2min. Dehydroepiandrosterone sulphate or 17β-oestradiol had weak inhibitory effects. Pregnenolone, and allopregnanolone, a progesterone metabolite and stereo-isomer of pregnanolone, all had no effects. Progesterone was the most potent of the steroids, especially against TRPC5 channel activity evoked by sphingosine-1-phosphate. In outside-out patch recordings, bath-applied progesterone and dihydrotestosterone had strong and reversible effects, suggesting relatively direct mechanisms of action. Progesterone inhibited native TRPC5-containing channel activity, evoked by oxidized phospholipid. CONCLUSIONS AND IMPLICATIONS: Our data suggest that TRPC5 channels are susceptible to relatively direct and rapid stereo-selective steroid modulation, leading to channel inhibition. The study adds to growing appreciation of TRP channels as non-genomic steroid sensors.

Indexed as

CalciumCells, CulturedDihydrotestosteroneEstradiolGonadal Steroid HormonesHEK293 CellsHumansLysophospholipidsMyocytes, Smooth MusclePatch-Clamp TechniquesPhospholipidsPregnenoloneProgesteroneSphingosineStereoisomerismStructure-Activity RelationshipCalciumDihydrotestosteroneEstradiolGonadal Steroid HormonesLysophospholipidsPhospholipidsPregnenolonepregnenolone sulfateProgesteroneSphingosinesphingosine 1-phosphateTRPC5 protein, humanTRPC Cation Channels

Identifiers

PMID21108630
PMCPMC3057289
OpenAlexW1521758582

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.