Evidence map›Paper›PMID 19197003›Full record

ArticleThe American journal of pathology2009

Chloride intracellular channel protein-4 functions in angiogenesis by supporting acidification of vacuoles along the intracellular tubulogenic pathway.

Barbara Ulmasov, Jonathan Bruno, Nicarter Gordon, M Elizabeth Hartnett, John C Edwards

Open access · bronzeAbstract read
In one paragraph

Article in The American journal of pathology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed
4.0field-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

64 citing papers in PubMed, 118 citations in OpenAlex.

  1. Article
  2. Article
  3. CLIC1 Supports Mechanisms Related to Platelet Activation and Thrombosis.Transfusion medicine and hemotherapy : offizielles Organ der Deutschen Gesellschaft fur Transfusionsmedizin und Immunhamatologie · 2025
    Article
  4. Review
  5. Review
  6. Article
  7. Article
  8. CLIC4 Regulates Endothelial Barrier Control by Mediating PAR1 Signaling via RhoA.Arteriosclerosis, thrombosis, and vascular biology · 2023
    Article
  9. Hungry for Chloride: Reprogramming Endothelial Cell Metabolism in Pulmonary Arterial Hypertension.American journal of respiratory cell and molecular biology · 2023
    Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Census of halide-binding sites in protein structures.Bioinformatics (Oxford, England) · 2020
    Article

4 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

5 authors at 3 institutions in 1 country.

Barbara UlmasovDepartment of Medicine, University of North Carolina, Chapel Hill, NC 27514-7155, USA.
Jonathan Bruno
Nicarter Gordon
M Elizabeth Hartnett
John C Edwards
University of North Carolina at Chapel Hill · USPediatrics and Genetics · USSaint Louis University · US

Funding

Endothelial Transmigration in Neovascular Age-related Macular DegenerationR01EY017011 · NEI · UNIV OF NORTH CAROLINA CHAPEL HILL · PI HARTNETT, MARY ELIZABETH RUTH · 2007 to 2025
$7.7M
Mechanisms of Angiogenesis of Retinopathy of PrematurityR01EY015130 · NEI · UNIV OF NORTH CAROLINA CHAPEL HILL · PI Mary Elizabeth Ruth Hartnett · 2005 to 2026
$7.6M
The CLIC-1 Chloride Channel: Structure and FunctionR01DK060551 · NIDDK · UNIV OF NORTH CAROLINA CHAPEL HILL · PI EDWARDS, JOHN C · 2003 to 2007
$1.1M
NEI NIH HHS R01 EY015130NEI NIH HHS R01 EY017011NIDDK NIH HHS R01 DK060551
6 · The paper itself

Abstract

Endothelial cells form capillary tubes through the process of intracellular tubulogenesis. Chloride intracellular channel (CLIC) family proteins have been previously implicated in intracellular tubulogenesis, but their specific role has not been defined. In this study, we show that disruption of the Clic4 gene in mice results in defective angiogenesis in vivo as reflected in a Matrigel plug angiogenesis assay. An angiogenesis defect is also apparent in the retina, both in the decreased spontaneous development of retinal vasculature of unstressed mice and in the dramatically decreased angiogenic response of retinal vessels to an oxygen toxicity challenge. We found that endothelial cells derived from Clic4(-/-) mice demonstrated impaired tubulogenesis in three-dimensional fibrin gels compared with cells derived from wild-type mice. Furthermore, we found that tubulogenesis of wild-type cells in culture was inhibited by both an inhibitor of CLICs and an inhibitor of the vacuolar proton ATPase. Finally, we showed that vacuoles along the endothelial tubulogenesis pathway are acidic in wild-type cells, and that vacuolar acidification is impaired in Clic4(-/-) cells while lysosomal acidification is intact. We conclude that CLIC4 plays a critical role in angiogenesis by supporting acidification of vacuoles along the cell-hollowing tubulogenic pathway.

Indexed as

AnimalsCell DivisionChloride ChannelsEndothelium, VascularGene AmplificationGenomeHydrogen-Ion ConcentrationMiceMice, KnockoutMitochondrial ProteinsNeovascularization, PathologicNeovascularization, PhysiologicRetinaVacuolesChloride ChannelsCLIC protein, mouseMitochondrial Proteins

Identifiers

PMID19197003
PMCPMC2665767
OpenAlexW2011722510

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.