Evidence map›Paper›PMID 28290478›Full record

ArticleScientific reports2017

Systematic errors in detecting biased agonism: Analysis of current methods and development of a new model-free approach.

H Ongun Onaran, Caterina Ambrosio, Özlem Uğur, Erzsebet Madaras Koncz, Maria Cristina Grò, Vanessa Vezzi, Sudarshan Rajagopal, Tommaso Costa

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
3.4field-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

37 citing papers in PubMed, 73 citations in OpenAlex.

  1. Review
  2. Agonism and Biased Signaling.Handbook of experimental pharmacology · 2026
    Review
  3. Review
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. The therapeutic potential of GLP-1 receptor biased agonism.British journal of pharmacology · 2022 · on this map
    Review
  17. Article
  18. Article
  19. Article
  20. 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 3 institutions in 3 countries.

H Ongun OnaranAnkara University, Faculty of Medicine, Department of Pharmacology, Molecular biology and Technology development unit, Sıhhiye, Ankara, Turkey.
Caterina AmbrosioIstituto Superiore di Sanitá, Dip. Farmaco, Rome, Italy.
Özlem UğurAnkara University, Faculty of Medicine, Department of Pharmacology, Molecular biology and Technology development unit, Sıhhiye, Ankara, Turkey.
Erzsebet Madaras KonczAnkara University, Faculty of Medicine, Department of Pharmacology, Molecular biology and Technology development unit, Sıhhiye, Ankara, Turkey.
Maria Cristina GròIstituto Superiore di Sanitá, Dip. Farmaco, Rome, Italy.
Vanessa VezziIstituto Superiore di Sanitá, Dip. Farmaco, Rome, Italy.
Sudarshan RajagopalDepartments of Medicine and Biochemistry, Duke University Medical Center, Durham, North Carolina, USA.
Tommaso CostaIstituto Superiore di Sanitá, Dip. Farmaco, Rome, Italy.
Istituto Superiore di Sanità · ITAnkara University · TRDuke Medical Center · US

Funding

Noncanonical Receptor Signaling in Pulmonary Arterial HypertensionK08HL114643 · NHLBI · DUKE UNIVERSITY · PI RAJAGOPAL, SUDARSHAN K · 2013 to 2017
$607k
NHLBI NIH HHS K08 HL114643
6 · The paper itself

Abstract

Discovering biased agonists requires a method that can reliably distinguish the bias in signalling due to unbalanced activation of diverse transduction proteins from that of differential amplification inherent to the system being studied, which invariably results from the non-linear nature of biological signalling networks and their measurement. We have systematically compared the performance of seven methods of bias diagnostics, all of which are based on the analysis of concentration-response curves of ligands according to classical receptor theory. We computed bias factors for a number of β-adrenergic agonists by comparing BRET assays of receptor-transducer interactions with Gs, Gi and arrestin. Using the same ligands, we also compared responses at signalling steps originated from the same receptor-transducer interaction, among which no biased efficacy is theoretically possible. In either case, we found a high level of false positive results and a general lack of correlation among methods. Altogether this analysis shows that all tested methods, including some of the most widely used in the literature, fail to distinguish true ligand bias from "system bias" with confidence. We also propose two novel semi quantitative methods of bias diagnostics that appear to be more robust and reliable than currently available strategies.

Indexed as

Biological AssayAdrenergic Agonistsbeta-ArrestinsBiasChromograninsClenbuterolDopamineEpinephrineGene ExpressionGTP-Binding Protein alpha Subunits, Gi-GoGTP-Binding Protein alpha Subunits, GsHEK293 CellsHumansIsoetharineIsoproterenolLigandsAdrenergic Agonistsbeta-ArrestinsChromograninsClenbuterolDopamineEpinephrineGNAS protein, humanGTP-Binding Protein alpha Subunits, Gi-GoGTP-Binding Protein alpha Subunits, GsIsoetharineIsoproterenolLigandsReceptors, Adrenergic, beta-2Recombinant Proteins

Identifiers

PMID28290478
PMCPMC5349545
OpenAlexW2718966341

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.