Evidence map›Paper›PMID 26546043›Full record

ArticleCancer letters2016

p-21 activated kinase 4 (PAK4) maintains stem cell-like phenotypes in pancreatic cancer cells through activation of STAT3 signaling.

Nikhil Tyagi, Saravanakumar Marimuthu, Arun Bhardwaj, Sachin K Deshmukh, Sanjeev K Srivastava, Ajay P Singh, Steven McClellan, James E Carter, Seema Singh

Open access · hybridAbstract read
In one paragraph

Article in Cancer letters, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed
4.5field-weighted citation impact, top 4% 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

50 citing papers in PubMed, 84 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
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  5. The Role of the p21-Activated Kinase Family in Tumor Immunity.International journal of molecular sciences · 2025
    Review
  6. Article
  7. Article
  8. Article
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  13. Cancer Stem Cells in Pancreatic Ductal Adenocarcinoma.International journal of molecular sciences · 2023
    Review
  14. Article
  15. Review
  16. Review
  17. Article
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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 at 2 institutions in 1 country.

Nikhil TyagiDepartment of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, Alabama 36604, USA.
Saravanakumar MarimuthuDepartment of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, Alabama 36604, USA.
Arun BhardwajDepartment of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, Alabama 36604, USA.
Sachin K DeshmukhDepartment of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, Alabama 36604, USA.
Sanjeev K SrivastavaDepartment of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, Alabama 36604, USA.
Ajay P SinghDepartment of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, Alabama 36604, USA; Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama, Mobile, Alabama 36688, USA.
Steven McClellanDepartment of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, Alabama 36604, USA.
James E CarterDepartment of Pathology, College of Medicine, University of South Alabama, Mobile, Alabama 36688, USA.
Seema SinghDepartment of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, Alabama 36604, USA; Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama, Mobile, Alabama 36688, USA. Electronic address: seemasingh@health.southalabama.edu.
USA Mitchell Cancer Institute · USUniversity of South Alabama · US

Funding

Impact of social factors on breast cancer biology in African-American womenR01CA231925 · NCI · UNIVERSITY OF SOUTH ALABAMA · PI SINGH, SEEMA · 2019 to 2023
$3.0M
Targeting tumor-stromal interaction for pancreatic cancer therapyR01CA175772 · NCI · UNIVERSITY OF SOUTH ALABAMA · PI SINGH, AJAY PRATAP · 2014 to 2018
$1.9M
Myb, a key driver of pancreatic cancer progression and metastasisR21CA167137 · NCI · UNIVERSITY OF SOUTH ALABAMA · PI SINGH, AJAY PRATAP · 2012 to 2013
$346k
ETV4 in pancreatic cancerR03CA169829 · NCI · UNIVERSITY OF SOUTH ALABAMA · PI SINGH, SEEMA · 2012 to 2013
$144k
NCI NIH HHS CA167137NCI NIH HHS CA169829NCI NIH HHS CA175772NCI NIH HHS R01 CA175772NCI NIH HHS R03 CA169829NCI NIH HHS R21 CA167137
6 · The paper itself

Abstract

Pancreatic cancer (PC) remains a highly lethal malignancy due to its unusual chemoresistance and high aggressiveness. A subpopulation of pancreatic tumor cells, known as cancer stem cells (CSCs), is considered responsible not only for tumor-maintenance, but also for its widespread metastasis and therapeutic failure. Here we investigated the role of p-21 activated kinase 4 (PAK4) in driving PC stemness properties. Our data demonstrate that triple-positive (CD24(+)/CD44(+)/EpCAM(+)) subpopulation of pancreatic CSCs exhibits greater level of PAK4 as compared to triple-negative (CD24(-)/CD44(-)/EpCAM(-)) cells. Moreover, PAK4 silencing in PC cells leads to diminished fraction of CD24, CD44, and EpCAM positive cells. Furthermore, we show that PAK4-silenced PC cells exhibit decreased sphere-forming ability and increased chemosensitivity to gemcitabine toxicity. PAK4 expression is also associated with enhanced levels of stemness-associated transcription factors (Oct4/Nanog/Sox2 and KLF4). Furthermore, our data show decreased nuclear accumulation and transcriptional activity of STAT3 in PAK4-silenced PC cells and restitution of its activity leads to restoration of stem cell phenotypes. Together, our findings deliver first experimental evidence for the involvement of PAK4 in PC stemness and support its clinical utility as a novel therapeutic target in PC.

Indexed as

Aldehyde Dehydrogenase 1 FamilyAntigens, NeoplasmCD24 AntigenCell Adhesion MoleculesCell Line, TumorEpithelial Cell Adhesion MoleculeHumansHyaluronan ReceptorsIsoenzymesKruppel-Like Factor 4Neoplastic Stem Cellsp21-Activated KinasesPancreatic NeoplasmsPhenotypeRetinal DehydrogenaseSignal TransductionAldehyde Dehydrogenase 1 FamilyALDH1A1 protein, humanAntigens, NeoplasmCD24 AntigenCD24 protein, humanCell Adhesion MoleculesEPCAM protein, humanEpithelial Cell Adhesion MoleculeHyaluronan ReceptorsIsoenzymesKLF4 protein, humanKruppel-Like Factor 4p21-Activated KinasesPAK4 protein, humanRetinal DehydrogenaseSTAT3 protein, humanSTAT3 Transcription FactorChemoresistancePAK4Pancreatic cancerSphere formationSTAT3Stemness

Identifiers

PMID26546043
PMCPMC4684758
OpenAlexW2191860362

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.