Evidence map›Paper›PMID 11901186›Full record

ArticleThe Journal of clinical investigation2002

Microtumor growth initiates angiogenic sprouting with simultaneous expression of VEGF, VEGF receptor-2, and angiopoietin-2.

Peter Vajkoczy, Mohammad Farhadi, Andreas Gaumann, Regina Heidenreich, Ralf Erber, Andreas Wunder, Jörg C Tonn, Michael D Menger, Georg Breier

Open access · greenAbstract read
In one paragraph

Article in The Journal of clinical investigation, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 1 pooled it
6.8field-weighted citation impact, top 2% 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, 1 synthesis or guideline pooled it, 220 citations in OpenAlex.

  1. Pathological and prognostic significance of hypoxia-inducible factor 1α expression in epithelial ovarian cancer: a meta-analysis.Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine · 2014
    Pooled it
  2. Cannabinoids: Role in Neurological Diseases and Psychiatric Disorders.International journal of molecular sciences · 2024
    Review
  3. KRAS mutation-driven angiopoietin 2 bestows anti-VEGF resistance in epithelial carcinomas.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  4. Article
  5. Review
  6. Review
  7. Article
  8. Review
  9. Article
  10. Targeting tumor vascularization: promising strategies for vascular normalization.Journal of cancer research and clinical oncology · 2021
    Review
  11. Article
  12. Article
  13. Article
  14. Review
  15. A fresh look at angiogenesis in juvenile idiopathic arthritis.Central-European journal of immunology · 2018
    Review
  16. Article
  17. Review
  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

9 authors at 4 institutions in 1 country.

Peter VajkoczyDepartment of Neurosurgery, Klinikum Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 103, D-68167 Mannheim, Germany. peter.vajkoczy@nch.ma.uni-heidelberg.de
Mohammad Farhadi
Andreas Gaumann
Regina Heidenreich
Ralf Erber
Andreas Wunder
Jörg C Tonn
Michael D Menger
Georg Breier
Heidelberg University · DEMax Planck Institute for Heart and Lung Research · DESaarland University · DEUniversity Medical Centre Mannheim · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Tumors have been thought to initiate as avascular aggregates of malignant cells that only later induce vascularization. Recently, this classic concept of tumor angiogenesis has been challenged by the suggestion that tumor cells grow by co-opting preexisting host vessels and thus initiate as well-vascularized tumors without triggering angiogenesis. To discriminate between these two mechanisms, we have used intravital epifluorescence microscopy and multi-photon laser scanning confocal microscopy to visualize C6 microglioma vascularization and tumor cell behavior. To address the mechanisms underlying tumor initiation, we assessed the expression of VEGF, VEGF receptor-2 (VEGFR-2), and angiopoietin-2 (Ang-2), as well as endothelial cell proliferation. We show that multicellular aggregates (<< 1 mm(3)) initiate vascular growth by angiogenic sprouting via the simultaneous expression of VEGFR-2 and Ang-2 by host and tumor endothelium. Host blood vessels are not co-opted by tumor cells but rather are used as trails for tumor cell invasion of the host tissue. Our data further suggest that the established microvasculature of growing tumors is characterized by a continuous vascular remodeling, putatively mediated by the expression of VEGF and Ang-2. The results of this study suggest a new concept of vascular tumor initiation that may have important implications for the clinical application of antiangiogenic strategies.

Indexed as

Angiopoietin-2AnimalsCell DivisionCell TransplantationCerebral CortexEndothelial Growth FactorsEndothelium, VascularEnzyme InhibitorsImmunohistochemistryIn Situ HybridizationLymphokinesMiceMice, NudeMicroscopy, ConfocalMuscle, SkeletalNeoplasms, ExperimentalAngiopoietin-2Endothelial Growth FactorsEnzyme InhibitorsLymphokinesPlatelet Endothelial Cell Adhesion Molecule-1ProteinsReceptor Protein-Tyrosine KinasesReceptors, Growth FactorReceptors, Vascular Endothelial Growth FactorVascular Endothelial Growth Factor AVascular Endothelial Growth Factors

Identifiers

PMID11901186
PMCPMC150910
OpenAlexW1986154258

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.