Evidence map›Paper›PMID 22919070›Full record

ArticleFASEB journal : official publication of the Federation of American Societies for Experimental Biology2012

Chemically engineering ligand selectivity at the free fatty acid receptor 2 based on pharmacological variation between species orthologs.

Brian D Hudson, Elisabeth Christiansen, Irina G Tikhonova, Manuel Grundmann, Evi Kostenis, David R Adams, Trond Ulven, Graeme Milligan

Open access · bronzeAbstract read
In one paragraph

Article in FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
2.8field-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

34 citing papers in PubMed, 89 citations in OpenAlex.

  1. Article
  2. Short-chain fatty acids.Nature metabolism · 2026
    Review
  3. Acetate concentration correlates with MSNA in patients with resistant hypertension.Clinical autonomic research : official journal of the Clinical Autonomic Research Society · 2025
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Review
  11. Review
  12. Article
  13. Dietary fatty acids in gut health: Absorption, metabolism and function.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2021
    Review
  14. Review
  15. Effects of Flavonoids Extracted fromAnimals : an open access journal from MDPI · 2021
    Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. DREADD Agonist 21 Is an Effective Agonist for Muscarinic-Based DREADDsACS pharmacology & translational science · 2018
    Article
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

8 authors at 5 institutions in 4 countries.

Brian D HudsonMolecular Pharmacology Group, Institute of Molecular, Cell, and Systems Biology, College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, UK.
Elisabeth Christiansen
Irina G Tikhonova
Manuel Grundmann
Evi Kostenis
David R Adams
Trond Ulven
Graeme Milligan
University of Bonn · DEUniversity of Glasgow · GBUniversity of Southern Denmark · DKHeriot-Watt University · GBQueen's University Belfast · GB

Funding

CIHRWellcome TrustWellcome Trust 089600/Z/09/Z
6 · The paper itself

Abstract

When it is difficult to develop selective ligands within a family of related G-protein-coupled receptors (GPCRs), chemically engineered receptors activated solely by synthetic ligands (RASSLs) are useful alternatives for probing receptor function. In the present work, we explored whether a RASSL of the free fatty acid receptor 2 (FFA2) could be developed on the basis of pharmacological variation between species orthologs. For this, bovine FFA2 was characterized, revealing distinct ligand selectivity compared with human FFA2. Homology modeling and mutational analysis demonstrated a single mutation in human FFA2 of C4.57G resulted in a human FFA2 receptor with ligand selectivity similar to the bovine receptor. This was exploited to generate human FFA2-RASSL by the addition of a second mutation at a known orthosteric ligand interaction site, H6.55Q. The resulting FFA2-RASSL displayed a >100-fold loss of activity to endogenous ligands, while responding to the distinct ligand sorbic acid with pEC(50) values for inhibition of cAMP, 5.83 ± 0.11; Ca(2+) mobilization, 4.63 ± 0.05; ERK phosphorylation, 5.61 ± 0.06; and dynamic mass redistribution, 5.35 ± 0.06. This FFA2-RASSL will be useful in future studies on this receptor and demonstrates that exploitation of pharmacological variation between species orthologs is a powerful method to generate novel chemically engineered GPCRs.

Indexed as

MutationAmino Acid SequenceAnimalsArrestinsbeta-ArrestinsBinding SitesCattleDose-Response Relationship, DrugExtracellular Signal-Regulated MAP KinasesFatty AcidsHEK293 CellsHumansLigandsModels, MolecularMolecular Sequence DataMolecular StructureArrestinsbeta-ArrestinsExtracellular Signal-Regulated MAP KinasesFatty AcidsFFAR2 protein, humanLigandsReceptors, Cell SurfaceReceptors, G-Protein-Coupled

Identifiers

PMID22919070
PMCPMC3509056
OpenAlexW2108878645

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.