Evidence map›Paper›PMID 22265409›Full record

ArticleCell2012

Requirements for efficient correction of ΔF508 CFTR revealed by analyses of evolved sequences.

Juan L Mendoza, André Schmidt, Qin Li, Emmanuel Nuvaga, Tyler Barrett, Robert J Bridges, Andrew P Feranchak, Chad A Brautigam, Philip J Thomas

Abstract read
In one paragraph

Article in Cell, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 159 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
159citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

159 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Use of elexacaftor+tezacaftor+ivacaftor in individuals with cystic fibrosis and at least one F508del allele: a systematic review and meta-analysis.Jornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia · 2024
    Pooled it
  2. Trial
  3. Article
  4. Proteostasis landscapes of cystic fibrosis variants reveal drug response vulnerability.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  5. Functional rescue of F508del-CFTR through revertant mutations introduced by CRISPR base editing.Molecular therapy : the journal of the American Society of Gene Therapy · 2025
    Article
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99 more citing papers are in PubMed but not listed here.

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

9 authors.

Juan L MendozaMolecular Biophysics Program, and Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9040, USA.
André Schmidt
Qin Li
Emmanuel Nuvaga
Tyler Barrett
Robert J Bridges
Andrew P Feranchak
Chad A Brautigam
Philip J Thomas

Funding

MOLECULAR MECHANISMS OF ION TRANSPORT BY THE SMGR01DE012309 · NIDCR · UT SOUTHWESTERN MEDICAL CENTER · PI THOMAS, PHILIP J · 1997 to 2011
$4.4M
DEVELOPMENT OF MEMBRANE PROTEIN STRUCTURER37DK049835 · NIDDK · UT SOUTHWESTERN MEDICAL CENTER · PI THOMAS, PHILIP J · 2008 to 2017
$3.6M
Development of Membrane Protein StructureR01DK049835 · NIDDK · UT SOUTHWESTERN MEDICAL CENTER · PI THOMAS, PHILIP J · 1996 to 2007
$2.1M
Molecular Mechanisms of HCO3- Secretion by the Pancreatic DuctR01DK076638 · NIDDK · UT SOUTHWESTERN MEDICAL CENTER · PI THOMAS, PHILIP J · 2009 to 2010
$676k
NIDCR NIH HHS DE12309NIDCR NIH HHS R01 DE012309NIDDK NIH HHS DK49835NIDDK NIH HHS DK76638NIDDK NIH HHS R01 DK076638NIDDK NIH HHS R37 DK049835
6 · The paper itself

Abstract

Misfolding of ΔF508 cystic fibrosis (CF) transmembrane conductance regulator (CFTR) underlies pathology in most CF patients. F508 resides in the first nucleotide-binding domain (NBD1) of CFTR near a predicted interface with the fourth intracellular loop (ICL4). Efforts to identify small molecules that restore function by correcting the folding defect have revealed an apparent efficacy ceiling. To understand the mechanistic basis of this obstacle, positions statistically coupled to 508, in evolved sequences, were identified and assessed for their impact on both NBD1 and CFTR folding. The results indicate that both NBD1 folding and interaction with ICL4 are altered by the ΔF508 mutation and that correction of either individual process is only partially effective. By contrast, combination of mutations that counteract both defects restores ΔF508 maturation and function to wild-type levels. These results provide a mechanistic rationale for the limited efficacy of extant corrector compounds and suggest approaches for identifying compounds that correct both defective steps.

Indexed as

Suppression, GeneticAnimalsATP-Binding Cassette TransportersCystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorHumansMiceModels, MolecularProtein FoldingProtein Structure, TertiaryATP-Binding Cassette TransportersCFTR protein, humanCystic Fibrosis Transmembrane Conductance Regulatorcystic fibrosis transmembrane conductance regulator delta F508

Identifiers

PMID22265409
PMCPMC3266553

What OpenQuestion holds

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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.