Evidence map›Paper›PMID 19844231›Full record

ArticleBritish journal of cancer2009

Expression of delta-like ligand 4 (Dll4) and markers of hypoxia in colon cancer.

A M Jubb, H Turley, H C Moeller, G Steers, C Han, J-L Li, R Leek, E Y Tan, B Singh, N J Mortensen and 6 more

Open access · hybridAbstract read
In one paragraph

Article in British journal of cancer, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed, 1 pooled it
3.8field-weighted citation impact, top 6% 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

49 citing papers in PubMed, 1 synthesis or guideline pooled it, 106 citations in OpenAlex.

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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

16 authors at 4 institutions in 3 countries.

A M JubbNuffield Department of Clinical Laboratory Sciences, University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DS, UK.
H Turley
H C Moeller
G Steers
C Han
J-L Li
R Leek
E Y Tan
B Singh
N J Mortensen
I Noguera-Troise
F Pezzella
K C Gatter
G Thurston
S B Fox
A L Harris
University of Oxford · GBJohn Radcliffe Hospital · GBRegeneron (United States) · USPeter MacCallum Cancer Centre · AU

Funding

Cancer Research UK
6 · The paper itself

Abstract

backgroundDelta-like ligand 4 (Dll4) is a Notch ligand that is upregulated by hypoxia and vascular endothelial growth factor-A (VEGF-A) and is reported to have a role in tumor angiogenesis. Evidence from xenograft studies suggests that inhibiting Dll4-Notch signalling may overcome resistance to anti-VEGF therapy. The aim of this study was to characterise the expression of Dll4 in colon cancer and to assess whether it is associated with markers of hypoxia and prognosis.

methodIn all, 177 colon cancers were represented in tissue microarrays. Immunohistochemistry was performed using validated antibodies against Dll4, VEGF, hypoxia-inducible factor (HIF)-1alpha, HIF-2alpha, prolyl hydroxylase (PHD)1, PHD2, PHD3 and carbonic anhydrase 9 (CA9).

resultsThe expression of Dll4 was observed preferentially in the endothelium of 71% (125 out of 175) of colon cancers, but not in the endothelium adjacent to normal mucosa (none out of 107, P<0.0001). The expression of VEGF was significantly associated with HIF-2alpha (P<0.0001) and Dll4 (P=0.010). Only HIF-2alpha had a significant multivariate prognostic effect (hazard ratio 1.61, 95% confidence interval 1.01-2.57). Delta-like ligand 4 was also expressed by neoplastic cells, particularly neoplastic goblet cells.

conclusionEndothelial expression of Dll4 is not a prognostic factor, but is significantly associated with VEGF. Assessing endothelial Dll4 expression may be critical in predicting response to anti-VEGF therapies.

Indexed as

Adaptor Proteins, Signal TransducingAdolescentAdultAgedAged, 80 and overBasic Helix-Loop-Helix ProteinsBiomarkers, TumorCalcium-Binding ProteinsCell HypoxiaColonic NeoplasmsEndothelial CellsEndothelial PAS Domain-Containing Protein 1FemaleGoblet CellsHumansImmunohistochemistryAdaptor Proteins, Signal TransducingBasic Helix-Loop-Helix ProteinsBiomarkers, TumorCalcium-Binding ProteinsDLL4 protein, humanEndothelial PAS Domain-Containing Protein 1Intercellular Signaling Peptides and ProteinsVascular Endothelial Growth Factor A

Identifiers

PMID19844231
PMCPMC2778546
OpenAlexW2056296460

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Registered trials

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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.