Evidence map›Paper›PMID 23049737›Full record

ArticlePloS one2012

Tie2-dependent neovascularization of the ischemic hindlimb is mediated by angiopoietin-2.

Michael Lekas, Poli Lekas, Shirley H J Mei, Yupu Deng, Daniel J Dumont, Duncan J Stewart

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 27% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 25 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. Article
  5. Vascular Regeneration in Peripheral Artery Disease.Arteriosclerosis, thrombosis, and vascular biology · 2020
    Review
  6. Myeloid ALX/FPR2 regulates vascularization following tissue injury.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  7. Article
  8. Article
  9. Article
  10. A Review of Anti-Angiogenic Targets for Monoclonal Antibody Cancer Therapy.International journal of molecular sciences · 2017
    Review
  11. Article
  12. Article
  13. ADAM12: a genetic modifier of preclinical peripheral arterial disease.American journal of physiology. Heart and circulatory physiology · 2015
    Article
  14. Article
  15. Article
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

6 authors at 3 institutions in 2 countries.

Michael LekasTerrence Donnelly Research Laboratories, Division of Cardiology, St. Michael's Hospital, Canada.
Poli Lekas
Shirley H J Mei
Yupu Deng
Daniel J Dumont
Duncan J Stewart
St. Michael's Hospital · CAHeart and Stroke Foundation · CASt Michael's Hospital · GB

Funding

Canadian Institutes of Health Research
6 · The paper itself

Abstract

The angiopoietins (ANGPT) are ligands for the endothelial cell (EC) receptor tyrosine kinase, Tie2. Angpt-1 is a Tie2 agonist that promotes vascular maturation and stabilization, whereas Angpt-2 is a partial agonist/antagonist involved in the initiation of postnatal angiogenesis. Therefore, we hypothesized that overexpression of Angpt-2 would be more effective than Angpt-1 for enhancing the perfusion recovery in the ischemic hindlimb. Perfusion recovery was markedly impaired in Tie2-deficient animals at day 35 in a model of chronic hindlimb ischemia. Injections of Angpt-2 or VEGFA plasmid at 7 days post femoral artery resection enhanced recovery and improved arteriogenesis as assessed by angiographic scores, whereas Angpt-1 or null plasmid had no effect. In addition, Angpt-2 together with VEGF resulted in greater improvement in perfusion and collateral vessel formation than VEGF alone. Similarly, conditional overexpression of Angpt-2 in mice improved ischemic limb blood flow recovery, while Angpt-1 overexpression was ineffective. These data from Tie2 heterozygote deficient mice demonstrate, for the first time, the importance of the Tie2 pathway in spontaneous neovascularization in response to chronic hindlimb ischemia. Moreover, they show that overexpression of the partial agonist, Angpt-2, but not Angpt-1, enhanced ischemic hind limb perfusion recovery and collateralization, suggesting that a coordinated sequence antagonist and agonist activity is required for effective therapeutic revascularization.

Indexed as

Angiopoietin-1Angiopoietin-2AnimalsCytomegalovirusEndothelium, VascularGene Expression RegulationGenetic TherapyGenetic VectorsHindlimbHumansInjections, IntramuscularIschemiaMaleMiceMice, KnockoutNeovascularization, PhysiologicAngiopoietin-1Angiopoietin-2ANGPT1 protein, humanReceptor, TIE-2Vascular Endothelial Growth Factor AVEGFA protein, human

Identifiers

PMID23049737
PMCPMC3458045
OpenAlexW1994585491

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.