Evidence map›Paper›PMID 24055006›Full record

ArticleChemistry & biology2013

A small molecule screen identifies selective inhibitors of urea transporter UT-A.

Cristina Esteva-Font, Puay-Wah Phuan, Marc O Anderson, A S Verkman

Open access · greenAbstract read
In one paragraph

Article in Chemistry & biology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
2.2field-weighted citation impact, top 12% 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

28 citing papers in PubMed, 44 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Review
  6. Protein Structures of Urea Transporters.Sub-cellular biochemistry · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Inhibitors of Mammalian Aquaporin Water Channels.International journal of molecular sciences · 2019
    Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

Cristina Esteva-FontDepartments of Medicine and Physiology, University of California, San Francisco, San Francisco, CA 94143-0521, USA.
Puay-Wah Phuan
Marc O Anderson
A S Verkman
University of California, San Francisco · USSan Francisco State University · US

Funding

SynthesisP30DK072517 · NIDDK · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VERKMAN, ALAN S · 2005 to 2022
$18.1M
Functional Role of Aquaporins in Eye PhysiologyR01EY013574 · NEI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VERKMAN, ALAN S · 2002 to 2022
$7.6M
MECHANISMS OF WATER TRANSPORT IN RENAL EPITHELIAR37DK035124 · NIDDK · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VERKMAN, ALAN S · 1999 to 2008
$4.2M
Application of Novel Optical Methods to Cell DynamicsR37EB000415 · NIBIB · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VERKMAN, ALAN S · 2007 to 2016
$4.1M
Application of Novel Optical Methods to Cell DynamicsR01EB000415 · NIBIB · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VERKMAN, ALAN S · 2002 to 2006
$1.7M
WATER AND NON-ELECTROLYTE TRANSPORT IN RENAL VESICLESR01DK035124 · NIDDK · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VERKMAN, ALAN S · 1986 to 2014
$1.4M
CFTR inhibitors for therapy of polycystic kidney diseaseRC1DK086125 · NIDDK · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI VERKMAN, ALAN S · 2009 to 2010
$989k
NEI NIH HHS EY13574NEI NIH HHS R01 EY013574NIBIB NIH HHS EB00415NIBIB NIH HHS R01 EB000415NIBIB NIH HHS R37 EB000415NIDDK NIH HHS DK35124NIDDK NIH HHS DK72517NIDDK NIH HHS DK86125NIDDK NIH HHS P30 DK072517NIDDK NIH HHS R01 DK035124NIDDK NIH HHS R37 DK035124NIDDK NIH HHS RC1 DK086125
6 · The paper itself

Abstract

Urea transporter (UT) proteins, including UT-A in kidney tubule epithelia and UT-B in vasa recta microvessels, facilitate urinary concentrating function. A screen for UT-A inhibitors was developed in MDCK cells expressing UT-A1, water channel aquaporin-1, and YFP-H148Q/V163S. An inwardly directed urea gradient produces cell shrinking followed by UT-A1-dependent swelling, which was monitored by YFP-H148Q/V163S fluorescence. Screening of ~90,000 synthetic small molecules yielded four classes of UT-A1 inhibitors with low micromolar half-maximal inhibitory concentration that fully and reversibly inhibited urea transport by a noncompetitive mechanism. Structure-activity analysis of >400 analogs revealed UT-A1-selective and UT-A1/UT-B nonselective inhibitors. Docking computations based on homology models of UT-A1 suggested inhibitor binding sites. UT-A inhibitors may be useful as diuretics ("urearetics") with a mechanism of action that may be effective in fluid-retaining conditions in which conventional salt transport-blocking diuretics have limited efficacy.

Indexed as

Drug Evaluation, PreclinicalAnimalsBinding SitesDogsHigh-Throughput Screening AssaysMadin Darby Canine Kidney CellsMembrane Transport ProteinsMolecular Docking SimulationProtein ConformationRatsReproducibility of ResultsSmall Molecule LibrariesStructure-Activity RelationshipSubstrate SpecificityUrea TransportersMembrane Transport ProteinsSmall Molecule LibrariesUrea Transporters

Identifiers

PMID24055006
PMCPMC3890325
OpenAlexW2023601465

What OpenQuestion holds

Textmetadata
LicenceTDM
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.