Evidence map›Paper›PMID 25071868›Full record

ArticleEpigenetics & chromatin2014

A mechanistic role for the chromatin modulator, NAP1L1, in pancreatic neuroendocrine neoplasm proliferation and metastases.

Simon Schimmack, Andrew Taylor, Ben Lawrence, Daniele Alaimo, Hubertus Schmitz-Winnenthal, Markus W Büchler, Irvin M Modlin, Mark Kidd

Open access · goldAbstract read
In one paragraph

Article in Epigenetics & chromatin, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
2.8field-weighted citation impact, top 10% 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

34 citing papers in PubMed, 68 citations in OpenAlex.

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  17. NAP1L1 Functions as a Tumor PromoterFrontiers in cell and developmental biology · 2021
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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

8 authors at 3 institutions in 2 countries.

Simon SchimmackGastrointestinal Pathobiology Research Group, Yale University School of Medicine, PO Box 208602, New Haven, CT 06510, USA ; Department of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 110, Heidelberg 69120, Germany.
Andrew TaylorGastrointestinal Pathobiology Research Group, Yale University School of Medicine, PO Box 208602, New Haven, CT 06510, USA.
Ben LawrenceGastrointestinal Pathobiology Research Group, Yale University School of Medicine, PO Box 208602, New Haven, CT 06510, USA.
Daniele AlaimoGastrointestinal Pathobiology Research Group, Yale University School of Medicine, PO Box 208602, New Haven, CT 06510, USA.
Hubertus Schmitz-WinnenthalDepartment of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 110, Heidelberg 69120, Germany.
Markus W BüchlerDepartment of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 110, Heidelberg 69120, Germany.
Irvin M ModlinGastrointestinal Pathobiology Research Group, Yale University School of Medicine, PO Box 208602, New Haven, CT 06510, USA.
Mark KiddGastrointestinal Pathobiology Research Group, Yale University School of Medicine, PO Box 208602, New Haven, CT 06510, USA.
Yale University · USHeidelberg University · DEUniversity Hospital Heidelberg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe chromatin remodeler NAP1L1, which is upregulated in small intestinal neuroendocrine neoplasms (NENs), has been implicated in cell cycle progression. As p57(Kip2) (CDKN1C), a negative regulator of proliferation and a tumor suppressor, is controlled by members of the NAP1 family, we tested the hypothesis that NAP1L1 may have a mechanistic role in regulating pancreatic NEN proliferation through regulation of p57(Kip2).

resultsNAP1L1 silencing (siRNA and shRNA/lipofectamine approach) decreased proliferation through inhibition of mechanistic (mammalian) target of rapamycin pathway proteins and their phosphorylation (p < 0.05) in the pancreatic neuroendocrine neoplasm cell line BON in vitro (p < 0.0001) and resulted in significantly smaller (p < 0.05) and lighter (p < 0.05) tumors in the orthotopic pancreatic NEN mouse model. Methylation of the p57 (Kip2) promoter was decreased by NAP1L1 silencing (p < 0.05), and expression of p57(Kip2) (transcript and protein) was upregulated. For methylation of the p57 (Kip2) promoter, NAP1L1 bound directly to the promoter (-164 to +21, chromatin immunoprecipitation). In 43 pancreatic NEN samples (38 primaries and 5 metastasis), NAP1L1 was over-expressed in metastasis (p < 0.001), expression which was inversely correlated with p57(Kip2) (p < 0.01) on mRNA and protein levels. Menin was not differentially expressed.

conclusionNAP1L1 is over-expressed in pancreatic neuroendocrine neoplasm metastases and epigenetically promotes cell proliferation through regulation of p57 (Kip2) promoter methylation.

Indexed as

NAP1L1p57Pancreatic neuroendocrine neoplasmspNETsProliferationPromoter methylation

Identifiers

PMID25071868
PMCPMC4112619
OpenAlexW2136917956

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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.