Evidence map›Paper›PMID 32182224›Full record

ArticleThe Journal of clinical investigation2020

Norrin mediates tumor-promoting and -suppressive effects in glioblastoma via Notch and Wnt.

Ahmed El-Sehemy, Hayden Selvadurai, Arturo Ortin-Martinez, Neno Pokrajac, Yasin Mamatjan, Nobuhiko Tachibana, Katherine Rowland, Lilian Lee, Nicole Park, Kenneth Aldape and 2 more

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of clinical investigation, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
1.1field-weighted citation impact, top 24% 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

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 24 citations in OpenAlex.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

12 authors at 4 institutions in 2 countries.

Ahmed El-SehemyDepartment of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada.
Hayden SelvaduraiDevelopmental and Stem Cell Biology Program and.
Arturo Ortin-MartinezDepartment of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada.
Neno PokrajacDepartment of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada.
Yasin MamatjanMacFeeters Hamilton Centre for Neuro-Oncology Research, Princess Margaret Cancer Centre, Toronto, Canada.
Nobuhiko TachibanaDepartment of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada.
Katherine RowlandDevelopmental and Stem Cell Biology Program and.
Lilian LeeDevelopmental and Stem Cell Biology Program and.
Nicole ParkDevelopmental and Stem Cell Biology Program and.
Kenneth AldapeMacFeeters Hamilton Centre for Neuro-Oncology Research, Princess Margaret Cancer Centre, Toronto, Canada.
Peter DirksDevelopmental and Stem Cell Biology Program and.
Valerie A WallaceDepartment of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada.
University Health Network · CAHospital for Sick Children · CAPrincess Margaret Cancer Centre · CAUniversity of Toronto · CA

Funding

CIHR
6 · The paper itself

Abstract

Glioblastoma multiforme (GBM) contains a subpopulation of cells, GBM stem cells (GSCs), that maintain the bulk tumor and represent a key therapeutic target. Norrin is a Wnt ligand that binds Frizzled class receptor 4 (FZD4) to activate canonical Wnt signaling. Although Norrin, encoded by NDP, has a well-described role in vascular development, its function in human tumorigenesis is largely unexplored. Here, we show that NDP expression is enriched in neurological cancers, including GBM, and its levels positively correlated with survival in a GBM subtype defined by low expression of ASCL1, a proneural factor. We investigated the function of Norrin and FZD4 in GSCs and found that it mediated opposing tumor-suppressive and -promoting effects on ASCL1lo and ASCL1hi GSCs. Consistent with a potential tumor-suppressive effect of Norrin suggested by the tumor outcome data, we found that Norrin signaling through FZD4 inhibited growth in ASCL1lo GSCs. In contrast, in ASCL1hi GSCs Norrin promoted Notch signaling, independently of WNT, to promote tumor progression. Forced ASCL1 expression reversed the tumor-suppressive effects of Norrin in ASCL1lo GSCs. Our results identify Norrin as a modulator of human brain cancer progression and reveal an unanticipated Notch-mediated function of Norrin in regulating cancer stem cell biology. This study identifies an unanticipated role of Norrin in human brain cancer progression. In addition, we provide preclinical evidence suggesting Norrin and canonical Wnt signaling as potential therapeutic targets for GBM subtype-restricted cancer stem cells.

Indexed as

Wnt Signaling PathwayBrain NeoplasmsCell Line, TumorEye ProteinsGlioblastomaHumansNeoplasm ProteinsNerve Tissue ProteinsReceptors, NotchWnt ProteinsEye ProteinsNDP protein, humanNeoplasm ProteinsNerve Tissue ProteinsReceptors, NotchWnt ProteinsBrain cancerNeuronal stem cellsOncogenesOncologyStem cells

Identifiers

PMID32182224
PMCPMC7260036
OpenAlexW3011416804

What OpenQuestion holds

Textmetadata
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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.