Evidence map›Paper›PMID 26592435›Full record

ArticleJournal of biomechanics2016

Superoxide mediates tight junction complex dissociation in cyclically stretched lung slices.

Min Jae Song, Nurit Davidovich, Gladys G Lawrence, Susan S Margulies

Abstract read
In one paragraph

Article in Journal of biomechanics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
1.4field-weighted citation impact, top 17% 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

21 citing papers in PubMed, 27 citations in OpenAlex.

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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

4 authors at 1 institution in 1 country.

Min Jae SongDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
Nurit DavidovichDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
Gladys G LawrenceDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
Susan S MarguliesDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA. Electronic address: Margulies@seas.upenn.edu.
University of Pennsylvania · US

Funding

MECHANICAL INJURY OF THE ALVEOLAR EPITHELIUMR01HL057204 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI MARGULIES, SUSAN SHEPS · 1997 to 2010
$3.3M
NHLBI NIH HHS R01 HL057204
6 · The paper itself

Abstract

We found that stretching Type I rat alveolar epithelial cell (RAEC) monolayers at magnitudes that correspond to high tidal-volume mechanical ventilation results in the production of reactive oxygen species, including nitric oxide and superoxide. Scavenging superoxide with Tiron eliminated the stretch-induced increase in cell monolayer permeability, and similar results were reported for rats ventilated at large tidal volumes, suggesting that oxidative stress plays an important role in barrier impairment in ventilator-induced lung injury associated with large stretch and tidal volumes. In this communication we show that mechanisms that involve oxidative injury are also present in a novel precision cut lung slices (PCLS) model under identical mechanical loads. PCLSs from healthy rats were stretched cyclically to 37% change in surface area for 1 hour. Superoxide was visualized using MitoSOX. To evaluate functional relationships, in separate stretch studies superoxide was scavenged using Tiron or mito-Tempo. PCLS and RAEC permeability was assessed as tight junction (TJ) protein (occludin, claudin-4 and claudin-7) dissociation from zona occludins-1 (ZO-1) via co-immunoprecipitation and Western blot, after 1h (PCLS) or 10min (RAEC) of stretch. Superoxide was increased significantly in PCLS, and Tiron and mito-Tempo dramatically attenuated the response, preventing claudin-4 and claudin-7 dissociation from ZO-1. Using a novel PCLS model for ventilator-induced lung injury studies, we have shown that uniform, biaxial, cyclic stretch generates ROS in the slices, and that superoxide scavenging that can protect the lung tissue under stretch conditions. We conclude that PCLS offer a valuable platform for investigating antioxidant treatments to prevent ventilation-induced lung injury.

Indexed as

AnimalsEpithelial CellsIn Vitro TechniquesNitric OxideOxidative StressPulmonary AlveoliRats, Sprague-DawleySuperoxidesTight JunctionsVentilator-Induced Lung InjuryNitric OxideSuperoxidesLung injuryOxidative stressPermeabilityTight junctions

Identifiers

PMID26592435
PMCPMC4864146
OpenAlexW2136214372

What OpenQuestion holds

Textmetadata
LicenceTDM
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.