Evidence map›Paper›PMID 26791140›Full record

ArticleBritish journal of pharmacology2016

Biased ligand quantification in drug discovery: from theory to high throughput screening to identify new biased μ opioid receptor agonists.

David Winpenny, Mellissa Clark, Darren Cawkill

Open access · bronzeAbstract read
In one paragraph

Article in British journal of pharmacology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
4.2field-weighted citation impact, top 6% 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

40 citing papers in PubMed, 61 citations in OpenAlex.

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  7. Molecular design of a therapeutic LSD analogue with reduced hallucinogenic potential.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  15. Agonist-Dependent Coupling of the Promiscuous Adenosine AACS pharmacology & translational science · 2022
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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.

David WinpennyPfizer Ltd, Great Abington, Cambridgeshire, UK.
Mellissa ClarkPfizer Ltd, Great Abington, Cambridgeshire, UK.
Darren CawkillPfizer Ltd, Great Abington, Cambridgeshire, UK.
Pfizer (United Kingdom) · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeBiased GPCR ligands are able to engage with their target receptor in a manner that preferentially activates distinct downstream signalling and offers potential for next generation therapeutics. However, accurate quantification of ligand bias in vitro is complex, and current best practice is not amenable for testing large numbers of compound. We have therefore sought to apply ligand bias theory to an industrial scale screening campaign for the identification of new biased μ receptor agonists. EXPERIMENTAL APPROACH: μ receptor assays with appropriate dynamic range were developed for both Gαi -dependent signalling and β-arrestin2 recruitment. Δlog(Emax /EC50 ) analysis was validated as an alternative for the operational model of agonism in calculating pathway bias towards Gαi -dependent signalling. The analysis was applied to a high throughput screen to characterize the prevalence and nature of pathway bias among a diverse set of compounds with μ receptor agonist activity. KEY

resultsA high throughput screening campaign yielded 440 hits with greater than 10-fold bias relative to DAMGO. To validate these results, we quantified pathway bias of a subset of hits using the operational model of agonism. The high degree of correlation across these biased hits confirmed that Δlog(Emax /EC50 ) was a suitable method for identifying genuine biased ligands within a large collection of diverse compounds. CONCLUSIONS AND IMPLICATIONS: This work demonstrates that using Δlog(Emax /EC50 ), drug discovery can apply the concept of biased ligand quantification on a large scale and accelerate the deliberate discovery of novel therapeutics acting via this complex pharmacology.

Indexed as

Drug DiscoveryHigh-Throughput Nucleotide SequencingAnimalsCells, CulturedCHO CellsCricetulusDose-Response Relationship, DrugEnkephalin, Ala(2)-MePhe(4)-Gly(5)-HumansLigandsReceptors, Opioid, muStructure-Activity RelationshipEnkephalin, Ala(2)-MePhe(4)-Gly(5)-LigandsReceptors, Opioid, mu

Identifiers

PMID26791140
PMCPMC4940816
OpenAlexW2279813976

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.