Evidence map›Paper›PMID 19893036›Full record

ArticleThe American journal of pathology2009

Syk tyrosine kinase acts as a pancreatic adenocarcinoma tumor suppressor by regulating cellular growth and invasion.

Tracy Layton, Cristel Stalens, Felizza Gunderson, Steve Goodison, Steve Silletti

Open access · bronzeAbstract read
In one paragraph

Article in The American journal of pathology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
1.8field-weighted citation impact, top 16% 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

32 citing papers in PubMed, 46 citations in OpenAlex.

  1. Trial
  2. Article
  3. New insights into SYK targeting in solid tumors.Trends in pharmacological sciences · 2024
    Review
  4. The Pivotal Role of Macrophages in the Pathogenesis of Pancreatic Diseases.International journal of molecular sciences · 2024
    Review
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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

5 authors at 1 institution in 1 country.

Tracy LaytonMoores Cancer Center, University of California, San Diego, La Jolla, California 92093-0803, USA.
Cristel Stalens
Felizza Gunderson
Steve Goodison
Steve Silletti
University of California, San Diego · US

Funding

Functional Analysis of metastasis-Associated ProteinsR01CA108597 · NCI · UNIVERSITY OF FLORIDA · PI GOODISON, STEVE · 2004 to 2008
$1.3M
Traget-Driven Identification of Diagnostic Patterns in Pancreatic AdenocarcinomaR03CA130104 · NCI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI SILLETTI, STEVEN A · 2007 to 2008
$155k
Potential Role of pp72syk in Pancreatic AdenocarcinomaR03CA109956 · NCI · UNIVERSITY OF CALIFORNIA SAN DIEGO · PI SILLETTI, STEVEN A · 2004 to 2005
$154k
NCI NIH HHS CA108597NCI NIH HHS CA109956NCI NIH HHS CA130104NCI NIH HHS R01 CA108597NCI NIH HHS R03 CA109956NCI NIH HHS R03 CA130104
6 · The paper itself

Abstract

We have identified the nonreceptor tyrosine kinase syk as a marker of differentiation/tumor suppressor in pancreatic ductal adenocarcinoma (PDAC). Syk expression is lost in poorly differentiated PDAC cells in vitro and in situ, and stable reexpression of syk in endogenously syk-negative Panc1 (Panc1/syk) cells retarded their growth in vitro and in vivo and reduced anchorage-independent growth in vitro. Panc1/syk cells exhibited a more differentiated morphology and down-regulated cyclin D1, akt, and CD171, which are overexpressed by Panc1 cells. Loss of PDAC syk expression in culture is due to promoter methylation, and reversal of promoter methylation caused reexpression of syk and concomitant down-regulation of CD171. Moreover, suppression of syk expression in BxPC3 cells caused de novo CD171 expression, consistent with the reciprocal expression of syk and CD171 we observe in situ. Importantly, Panc1/syk cells demonstrated dramatically reduced invasion in vitro. Affymetrix analysis identified statistically significant regulation of >2000 gene products by syk in Panc1 cells. Of these, matrix metalloproteinase-2 (MMP2) and tissue inhibitor of metalloproteinase-2 were down-regulated, suggesting that the MMP2 axis might mediate Panc1/mock invasion. Accordingly, MMP2 inhibition suppressed the in vitro invasion of Panc1/mock cells without effect on Panc1/syk cells. This study demonstrates a prominent role for syk in regulating the differentiation state and invasive phenotype of PDAC cells.

Indexed as

Carcinoma, Pancreatic DuctalCell ProliferationDNA MethylationGene ExpressionGene Expression Regulation, NeoplasticGenes, Tumor SuppressorHumansImage Processing, Computer-AssistedImmunoblottingImmunohistochemistryImmunoprecipitationNeoplasm InvasivenessOligonucleotide Array Sequence AnalysisPancreatic NeoplasmsPromoter Regions, GeneticReverse Transcriptase Polymerase Chain ReactionZAP-70 Protein-Tyrosine Kinase

Identifiers

PMID19893036
PMCPMC2789622
OpenAlexW2083955716

What OpenQuestion holds

Textmetadata
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.