Evidence map›Paper›PMID 32630830›Full record

ArticleCells2020

KLF4 Acts as a wt-CFTR Suppressor through an AKT-Mediated Pathway.

Luis Sousa, Ines Pankonien, Luka A Clarke, Iris Silva, Karl Kunzelmann, Margarida D Amaral

Open access · goldAbstract read
In one paragraph

Article in Cells, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
0.9field-weighted citation impact, top 27% 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

11 citing papers in PubMed, 13 citations in OpenAlex.

  1. Revealing the impact ofFrontiers in immunology · 2025
    Article
  2. Article
  3. Review
  4. Article
  5. Article
  6. CFTR and Gastrointestinal Cancers: An Update.Journal of personalized medicine · 2022
    Review
  7. Article
  8. Pathophysiology of Lung Disease and Wound Repair in Cystic Fibrosis.Pathophysiology : the official journal of the International Society for Pathophysiology · 2021
    Review
  9. Review
  10. Article
  11. 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

6 authors at 2 institutions in 2 countries.

Luis SousaBioISI-Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, Portugal.
Ines PankonienBioISI-Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, Portugal.
Luka A ClarkeBioISI-Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, Portugal.
Iris SilvaBioISI-Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, Portugal.ORCID 0000-0002-8062-5558
Karl KunzelmannDepartment of Physiology, University of Regensburg, 93053 Regensburg, Germany.
Margarida D AmaralBioISI-Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, Portugal.ORCID 0000-0002-0828-8630
University of Lisbon · PTUniversity of Regensburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Cystic Fibrosis (CF) is caused by >2000 mutations in the CF transmembrane conductance regulator (CFTR) gene, but one mutation-F508del-occurs in ~80% of patients worldwide. Besides its main function as an anion channel, the CFTR protein has been implicated in epithelial differentiation, tissue regeneration, and, when dysfunctional, cancer. However, the mechanisms that regulate such relationships are not fully elucidated. Krüppel-like factors (KLFs) are a family of transcription factors (TFs) playing central roles in development, stem cell differentiation, and proliferation. Herein, we hypothesized that these TFs might have an impact on CFTR expression and function, being its missing link to differentiation. Our results indicate that KLF4 (but not KLF2 nor KLF5) is upregulated in CF vs. non-CF cells and that it negatively regulates wt-CFTR expression and function. Of note, F508del-CFTR expressing cells are insensitive to KLF4 modulation. Next, we investigated which KLF4-related pathways have an effect on CFTR. Our data also show that KLF4 modulates wt-CFTR (but not F508del-CFTR) via both the serine/threonine kinase AKT1 (AKT) and glycogen synthase kinase 3 beta (GSK3β) signaling. While AKT acts positively, GSK3β is a negative regulator of CFTR. This crosstalk between wt-CFTR and KLF4 via AKT/ GSK3β signaling, which is disrupted in CF, constitutes a novel mechanism linking CFTR to the epithelial differentiation.

Indexed as

Signal TransductionCell LineCystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorGlycogen Synthase Kinase 3 betaHumansKruppel-Like Factor 4Kruppel-Like Transcription FactorsProto-Oncogene Proteins c-aktUp-RegulationAKT1 protein, humanCystic Fibrosis Transmembrane Conductance RegulatorGlycogen Synthase Kinase 3 betaKLF4 protein, humanKruppel-Like Factor 4Kruppel-Like Transcription FactorsProto-Oncogene Proteins c-aktAKT signalingCFTRcystic fibrosisepithelial differentiationGSK3βKLF2KLF5

Identifiers

PMID32630830
PMCPMC7408019
OpenAlexW3040254314

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.