Evidence map›Paper›PMID 21873500›Full record

ArticleAmerican journal of physiology. Heart and circulatory physiology2011

Temporal and spatial correlation of platelet-activating factor-induced increases in endothelial [Ca²⁺]i, nitric oxide, and gap formation in intact venules.

Xueping Zhou, Pingnian He

Open access · greenAbstract read
In one paragraph

Article in American journal of physiology. Heart and circulatory physiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
0.7field-weighted citation impact, top 29% 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, 18 citations in OpenAlex.

  1. Role of shear stress-induced red blood cell released ATP in atherosclerosis.American journal of physiology. Heart and circulatory physiology · 2025
    Article
  2. Article
  3. Leveraging avidin-biotin interaction to quantify permeability property of microvessels-on-a-chip networks.American journal of physiology. Heart and circulatory physiology · 2022
    Article
  4. Review
  5. HPhysiological reports · 2019
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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

2 authors at 1 institution in 1 country.

Xueping ZhouDepartment of Physiology and Pharmacology, School of Medicine, West Virginia University, Morgantown, WV 26506-9229, USA.
Pingnian He
West Virginia University · US

Funding

CELLULAR MODULATION OF MICROVESSEL PERMEABILITY IN VIVOR01HL056237 · NHLBI · WEST VIRGINIA UNIVERSITY · PI HE, PINGNIAN · 2001 to 2013
$3.1M
Nitric Oxide and Microvessel Permeability In VivoR01HL084338 · NHLBI · WEST VIRGINIA UNIVERSITY · PI HE, PINGNIAN · 2007 to 2011
$1.6M
CELLULAR MODULATION OF MICROVESSEL PERMEABILITY IN VIVOR29HL056237 · NHLBI · UNIVERSITY OF CALIFORNIA DAVIS · PI HE, PINGNIAN · 1997 to 2001
$121k
NHLBI NIH HHS HL-084338NHLBI NIH HHS HL-56237NHLBI NIH HHS R01 HL056237NHLBI NIH HHS R01 HL084338
6 · The paper itself

Abstract

We have previously demonstrated that platelet-activating factor (PAF)-induced increases in microvessel permeability were associated with endothelial gap formation and that the magnitude of peak endothelial intracellular Ca(2+) concentration ([Ca(2+)](i)) and nitric oxide (NO) production at the single vessel level determines the degree of the permeability increase. This study aimed to examine whether the magnitudes of PAF-induced peak endothelial [Ca(2+)](i), NO production, and gap formation are correlated at the individual endothelial cell level in intact rat mesenteric venules. Endothelial gaps were quantified by the accumulation of fluorescent microspheres at endothelial clefts using confocal imaging. Endothelial [Ca(2+)](i) was measured on fura-2- or fluo-4-loaded vessels, and 4,5-diaminofluorescein (DAF-2) was used for NO measurements. The results showed that increases in endothelial [Ca(2+)](i), NO production, and gap formation occurred in all endothelial cells when vessels were exposed to PAF but manifested a spatial heterogeneity in magnitudes among cells in each vessel. PAF-induced peak endothelial [Ca(2+)](i) preceded the peak NO production by 0.6 min at the cellular level, and the magnitudes of NO production and gap formation linearly correlated with that of the peak endothelial [Ca(2+)](i) in each cell, suggesting that the initial levels of endothelial [Ca(2+)](i) determine downstream NO production and gap formation. These results provide direct evidence from intact venules that inflammatory mediator-induced increases in microvessel permeability are associated with the generalized formation of endothelial gaps around all endothelial cells. The spatial differences in the molecular signaling that were initiated by the heterogeneous endothelial Ca(2+) response contribute to the heterogeneity in permeability increases along the microvessel wall during inflammation.

Indexed as

Capillary PermeabilityAnimalsCalciumEndothelial CellsFemaleGap JunctionsInflammation MediatorsMesenteryMicroscopy, ConfocalNitric OxidePlatelet Activating FactorRatsRats, Sprague-DawleyTime FactorsVenulesCalciumInflammation MediatorsNitric OxidePlatelet Activating Factor

Identifiers

PMID21873500
PMCPMC3213973
OpenAlexW2104358275

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.