Evidence map›Paper›PMID 10079260›Full record

ArticleThe American journal of pathology1999

Exposure to hyperoxia decreases the expression of vascular endothelial growth factor and its receptors in adult rat lungs.

J G Klekamp, K Jarzecka, E A Perkett

Open access · bronzeAbstract read
In one paragraph

Article in The American journal of pathology, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
1.4field-weighted citation impact, top 20% 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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 99 citations in OpenAlex.

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  17. Neonatal oxygen adversely affects lung function in adult mice without altering surfactant composition or activity.American journal of physiology. Lung cellular and molecular physiology · 2009
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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

3 authors at 1 institution in 1 country.

J G KlekampDepartment of Critical Care Medicine, Vanderbilt University, Nashville, Tennessee, USA.
K Jarzecka
E A Perkett
Vanderbilt University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Exposure to high levels of inspired oxygen leads to respiratory failure and death in many animal models. Endothelial cell death is an early finding, before the onset of respiratory failure. Vascular endothelial growth factor (VEGF) is highly expressed in the lungs of adult animals. In the present study, adult Sprague-Dawley rats were exposed to >95% FiO2 for 24 or 48 hours. Northern blot analysis revealed a marked reduction in VEGF mRNA abundance by 24 hours, which decreased to less than 50% of control by 48 hours. In situ hybridization revealed that VEGF was highly expressed in distal airway epithelial cells in controls but disappeared in the oxygen-exposed animals. Immunohistochemistry and Western blot analyses demonstrated that VEGF protein was decreased at 48 hours. TUNEL staining demonstrated the presence of apoptotic cells coincident with the decline in VEGF. Abundance of VEGF receptor mRNAs (Flt-1 and KDR/Flk) decreased in the late time points of the study (48 hours), possibly secondary to the loss of endothelial cells. We speculate that VEGF functions as a survival factor in the normal adult rat lung, and its loss during hyperoxia contributes to the pathophysiology of oxygen-induced lung damage.

Indexed as

AnimalsApoptosisEndothelial Growth FactorsHyperoxiaLungLymphokinesMaleProto-Oncogene ProteinsRatsRats, Sprague-DawleyReceptor Protein-Tyrosine KinasesReceptors, Growth FactorReceptors, Vascular Endothelial Growth FactorRNA, MessengerVascular Endothelial Growth Factor AVascular Endothelial Growth Factor Receptor-1Endothelial Growth FactorsLymphokinesProto-Oncogene ProteinsReceptor Protein-Tyrosine KinasesReceptors, Growth FactorReceptors, Vascular Endothelial Growth FactorRNA, MessengerVascular Endothelial Growth Factor AVascular Endothelial Growth Factor Receptor-1Vascular Endothelial Growth Factors

Identifiers

PMID10079260
PMCPMC1866417
OpenAlexW1969367710

What OpenQuestion holds

Texttitle and abstract
measurements read2
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.