Evidence map›Paper›PMID 26437177›Full record

ArticlePLoS neglected tropical diseases2015

The Cyclooctadepsipeptide Anthelmintic Emodepside Differentially Modulates Nematode, Insect and Human Calcium-Activated Potassium (SLO) Channel Alpha Subunits.

Anna Crisford, Ulrich Ebbinghaus-Kintscher, Eva Schoenhense, Achim Harder, Klaus Raming, Ita O'Kelly, Kelechi Ndukwe, Vincent O'Connor, Robert J Walker, Lindy Holden-Dye

Open access · goldAbstract read
In one paragraph

Article in PLoS neglected tropical diseases, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
3.7field-weighted citation impact, top 9% 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

17 citing papers in PubMed, 32 citations in OpenAlex.

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  15. Onchodermatitis: Where Are We Now?Tropical medicine and infectious disease · 2018
    Review
  16. Article
  17. Research for new drugs for elimination of onchocerciasis in Africa.International journal for parasitology. Drugs and drug resistance · 2016
    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 3 institutions in 2 countries.

Anna CrisfordCentre for Biological Sciences, University of Southampton, Southampton, United Kingdom.
Ulrich Ebbinghaus-KintscherBayer CropScience Aktiengesellschaft, BCS AG-R&D-SMR-PC-PCB-PB, Monheim, Germany.
Eva SchoenhenseBayer CropScience Aktiengesellschaft, BCS AG-R&D-SMR-PC-PCB-PB, Monheim, Germany.
Achim HarderBayer Animal Health GmbH, BHC-GDD-AH-PARA-AR, Monheim, Germany.
Klaus RamingBayer CropScience Aktiengesellschaft, BCS AG-R&D-SMR-PC-PCB-PB, Monheim, Germany.
Ita O'KellyFaculty of Medicine, Southampton General Hospital, Southampton, United Kingdom.
Kelechi NdukweCentre for Biological Sciences, University of Southampton, Southampton, United Kingdom.
Vincent O'ConnorCentre for Biological Sciences, University of Southampton, Southampton, United Kingdom.
Robert J WalkerCentre for Biological Sciences, University of Southampton, Southampton, United Kingdom.
Lindy Holden-DyeCentre for Biological Sciences, University of Southampton, Southampton, United Kingdom.
University of Southampton · GBBayer (Germany) · DESouthampton General Hospital · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The anthelmintic emodepside paralyses adult filarial worms, via a mode of action distinct from previous anthelmintics and has recently garnered interest as a new treatment for onchocerciasis. Whole organism data suggest its anthelmintic action is underpinned by a selective activation of the nematode isoform of an evolutionary conserved Ca2+-activated K+ channel, SLO-1. To test this at the molecular level we compared the actions of emodepside at heterologously expressed SLO-1 alpha subunit orthologues from nematode (Caenorhabditis elegans), Drosophila melanogaster and human using whole cell voltage clamp. Intriguingly we found that emodepside modulated nematode (Ce slo-1), insect (Drosophila, Dm slo) and human (hum kcnma1)SLO channels but that there are discrete differences in the features of the modulation that are consistent with its anthelmintic efficacy. Nematode SLO-1 currents required 100 μM intracellular Ca2+ and were strongly facilitated by emodepside (100 nM; +73.0 ± 17.4%; n = 9; p < 0.001). Drosophila Slo currents on the other hand were activated by emodepside (10 μM) in the presence of 52 nM Ca2+ but were inhibited in the presence of 290 nM Ca2+ and exhibited a characteristic loss of rectification. Human Slo required 300 nM Ca2+ and emodepside transiently facilitated currents (100 nM; +33.5 ± 9%; n = 8; p<0.05) followed by a sustained inhibition (-52.6 ± 9.8%; n = 8; p < 0.001). This first cross phyla comparison of the actions of emodepside at nematode, insect and human channels provides new mechanistic insight into the compound's complex modulation of SLO channels. Consistent with whole organism behavioural studies on C. elegans, it indicates its anthelmintic action derives from a strong activation of SLO current, not observed in the human channel. These data provide an important benchmark for the wider deployment of emodepside as an anthelmintic treatment.

Indexed as

AnimalsAnthelminticsCalciumCHO CellsCricetulusDepsipeptidesDrosophila melanogasterHEK293 CellsHumansLarge-Conductance Calcium-Activated Potassium Channel alpha SubunitsProtein SubunitsAnthelminticsCalciumDepsipeptidesemodepsideKCNMA1 protein, humanLarge-Conductance Calcium-Activated Potassium Channel alpha SubunitsProtein Subunits

Identifiers

PMID26437177
PMCPMC4593646
OpenAlexW1902889185

What OpenQuestion holds

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LicenceCC BY
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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.