Evidence map›Paper›PMID 27481062›Full record

ArticleBiochemical pharmacology2016

Structure-based identification and characterisation of structurally novel human P2X7 receptor antagonists.

Emily A Caseley, Stephen P Muench, Colin W Fishwick, Lin-Hua Jiang

Open access · hybridAbstract read
In one paragraph

Article in Biochemical pharmacology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
4.1field-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

19 citing papers in PubMed, 29 citations in OpenAlex.

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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

4 authors at 1 institution in 1 country.

Emily A CaseleySchool of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, UK.
Stephen P MuenchSchool of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, UK.
Colin W FishwickSchool of Chemistry, University of Leeds, UK.
Lin-Hua JiangSchool of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, UK. Electronic address: l.h.jiang@leeds.ac.uk.
University of Leeds · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

The P2X7 receptor (P2X7R) plays an important role in diverse conditions associated with tissue damage and inflammation, meaning that the human P2X7R (hP2X7R) is an attractive therapeutic target. The crystal structures of the zebrafish P2X4R in the closed and ATP-bound open states provide an unprecedented opportunity for structure-guided identification of new ligands. The present study performed virtual screening of ∼100,000 structurally diverse compounds against the ATP-binding pocket in the hP2X7R. This identified three compounds (C23, C40 and C60) out of 73 top-ranked compounds by testing against hP2X7R-mediated Ca(2+) responses. These compounds were further characterised using Ca(2+) imaging, patch-clamp current recording, YO-PRO-1 uptake and propidium iodide cell death assays. All three compounds inhibited BzATP-induced Ca(2+) responses concentration-dependently with IC50s of 5.1±0.3μM, 4.8±0.8μM and 3.2±0.2μM, respectively. C23 and C40 inhibited BzATP-induced currents in a reversible and concentration-dependent manner, with IC50s of 0.35±0.3μM and 1.2±0.1μM, respectively, but surprisingly C60 did not affect BzATP-induced currents up to 100μM. They suppressed BzATP-induced YO-PRO-1 uptake with IC50s of 1.8±0.9μM, 1.0±0.1μM and 0.8±0.2μM, respectively. Furthermore, these three compounds strongly protected against ATP-induced cell death. Among them, C40 and C60 exhibited strong specificity towards the hP2X7R over the hP2X4R and rP2X3R. In conclusion, our study reports the identification of three novel hP2X7R antagonists with micromolar potency for the first time using a structure-based approach, including the first P2X7R antagonist with preferential inhibition of large pore formation.

Indexed as

Models, MolecularAdenosine TriphosphateAmidesAnimalsAnti-Inflammatory Agents, Non-SteroidalBinding SitesCalcium SignalingHEK293 CellsHepatocytesHumansImage Processing, Computer-AssistedIndolesLigandsMicroscopy, FluorescencePatch-Clamp TechniquesPurinergic P2X Receptor Antagonists3'-O-(4-benzoyl)benzoyladenosine 5'-triphosphateAdenosine TriphosphateAmidesAnti-Inflammatory Agents, Non-SteroidalIndolesLigandsP2rx3 protein, ratP2RX4 protein, humanP2RX7 protein, humanPurinergic P2X Receptor AntagonistsReceptors, Purinergic P2X3Receptors, Purinergic P2X4Receptors, Purinergic P2X7Recombinant ProteinsSmall Molecule LibrariesThiophenesZINC09315614ZINC58368839ZINC67825876Ca(2+) imaginghP2X7R antagonistsPatch-clamp recordingVirtual screeningYO-PRO-1 dye uptake

Identifiers

PMID27481062
PMCPMC5012888
OpenAlexW2497508919

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.