Evidence map›Paper›PMID 33140138›Full record

ReviewCancer metastasis reviews2021

Secreted frizzled-related protein 2: a key player in noncanonical Wnt signaling and tumor angiogenesis.

Karlijn van Loon, Elisabeth J M Huijbers, Arjan W Griffioen

Open access · hybridAbstract readReview
In one paragraph

Review in Cancer metastasis reviews, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed
4.3field-weighted citation impact, top 5% 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

73 citing papers in PubMed, 94 citations in OpenAlex.

  1. Trial
  2. SFRP2Molecular carcinogenesis · 2026
    Article
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  6. Review
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  15. Evolutionary conservation and cancer implications of the WNT signaling pathway.Medical oncology (Northwood, London, England) · 2025
    Review
  16. Secreted Frizzled-related proteins in animal development.Histochemistry and cell biology · 2025
    Review
  17. Article
  18. Article
  19. Article
  20. Article

13 more citing papers are in PubMed but not listed here.

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

3 authors at 1 institution in 1 country.

Karlijn van LoonAngiogenesis Laboratory, Cancer Center Amsterdam, Department of Medical Oncology, VU University Medical Center, Amsterdam UMC, Amsterdam, The Netherlands.
Elisabeth J M HuijbersAngiogenesis Laboratory, Cancer Center Amsterdam, Department of Medical Oncology, VU University Medical Center, Amsterdam UMC, Amsterdam, The Netherlands.
Arjan W GriffioenAngiogenesis Laboratory, Cancer Center Amsterdam, Department of Medical Oncology, VU University Medical Center, Amsterdam UMC, Amsterdam, The Netherlands. a.griffioen@amsterdamumc.nl.
Amsterdam UMC Location VUmc · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Secreted frizzled-related proteins (SFRP) are glycoproteins containing a so-called frizzled-like cysteine-rich domain. This domain enables them to bind to Wnt ligands or frizzled (FzD) receptors, making potent regulators of Wnt signaling. As Wnt signaling is often altered in cancer, it is not surprising that Wnt regulators such as SFRP proteins are often differentially expressed in the tumor microenvironment, both in a metastatic and non-metastatic setting. Indeed, SFRP2 is shown to be specifically upregulated in the tumor vasculature of several types of cancer. Several studies investigated the functional role of SFRP2 in the tumor vasculature, showing that SFRP2 binds to FzD receptors on the surface of tumor endothelial cells. This activates downstream Wnt signaling and which is, thereby, stimulating angiogenesis. Interestingly, not the well-known canonical Wnt signaling pathway, but the noncanonical Wnt/Ca

Indexed as

Membrane ProteinsNeoplasmsNeovascularization, PathologicWnt Signaling PathwayEndothelial CellsFrizzled-Related ProteinsHumansIntracellular Signaling Peptides and ProteinsSecreted Frizzled-Related ProteinsTumor MicroenvironmentFrizzled-Related ProteinsIntracellular Signaling Peptides and ProteinsMembrane ProteinsSecreted Frizzled-Related ProteinsSFRP2 protein, humanAngiogenesisCancerSFRP2Therapeutic targetTumor vasculatureWnt signaling

Identifiers

PMID33140138
PMCPMC7897195
OpenAlexW3096377085

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.