Evidence map›Paper›PMID 23537951›Full record

ArticleExperimental neurology2013

Hyperbaric oxygen preconditioning attenuates hyperglycemia-enhanced hemorrhagic transformation by inhibiting matrix metalloproteinases in focal cerebral ischemia in rats.

Yoshiteru Soejima, Qin Hu, Paul R Krafft, Mutsumi Fujii, Jiping Tang, John H Zhang

Abstract read
In one paragraph

Article in Experimental neurology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 1 pooled it
6.1field-weighted citation impact, top 3% 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

30 citing papers in PubMed, 1 synthesis or guideline pooled it, 56 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

6 authors at 1 institution in 1 country.

Yoshiteru SoejimaDepartment of Neurosurgery, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA.
Qin Hu
Paul R Krafft
Mutsumi Fujii
Jiping Tang
John H Zhang
Loma Linda University · US

Funding

Mechanisms of Hyperbaric Oxygen Induced Brain ProtectionR01NS043338 · NINDS · LOUISIANA STATE UNIV HSC SHREVEPORT · PI ZHANG, JOHN H · 2004 to 2014
$3.0M
Oxygen Therapy in Neonatal Hypoxia-IschemiaR01HD043120 · NICHD · LOUISIANA STATE UNIV HSC SHREVEPORT · PI ZHANG, JOHN H. · 2003 to 2007
$1.6M
NICHD NIH HHS R01 HD043120NINDS NIH HHS NS043338NINDS NIH HHS R01 NS043338
6 · The paper itself

Abstract

Hyperglycemia dramatically aggravates brain infarct and hemorrhagic transformation (HT) after ischemic stroke. Oxidative stress and matrix metalloproteinases (MMPs) play an important role in the pathophysiology of HT. Hyperbaric oxygen preconditioning (HBO-PC) has been proved to decrease oxidative stress and has been demonstrated to be neuroprotective in experimental stroke models. The present study determined whether HBO-PC would ameliorate HT by a pre-ischemic increase of reactive oxygen species (ROS) generation, and a suppression of MMP-2 and MMP-9 in hyperglycemic middle cerebral artery occlusion (MCAO) rats. Rats were pretreated with HBO (100% O₂, 2.5 atmosphere absolutes) 1 h daily for 5 days before MCAO. Acute hyperglycemia was induced by an injection of 50% dextrose. Neurological deficits, infarction volume and hemorrhagic volume were assessed 24 h and 7 days after ischemia. ROS scavenger n-acetyl cysteine (NAC), hypoxia-inducible factor-1α (HIF-1α), inhibitor 2-methoxyestradiol (2ME2) and activator cobalt chloride (CoCl₂), and MMP inhibitor SB-3CT were administrated for mechanism study. The activity of MMP-2 and MMP-9, and the expression HIF-1α were measured. HBO-PC improved neurological deficits, and reduced hemorrhagic volume; the expression of HIF-1α was significantly decreased, and the activity of MMP-2 and MMP-9 was reduced by HBO-PC compared with vehicle group. Our results suggested that HBO-PC attenuated HT via decreasing HIF-1α and its downstream MMP-2 and MMP-9 in hyperglycemic MCAO rats.

Indexed as

Analysis of VarianceAnimalsBlood GlucoseCerebral HemorrhageCerebral InfarctionCobaltDisease Models, AnimalFree Radical ScavengersGene Expression RegulationGlucoseHemoglobinsHyperbaric OxygenationHyperglycemiaInfarction, Middle Cerebral ArteryIschemic PreconditioningMaleBlood GlucoseCobaltcobaltous chlorideFree Radical ScavengersGlucoseHemoglobinsMetalloproteasesReactive Oxygen SpeciesHemorrhagic transformationHyperbaric oxygen preconditioningMCAOMMP-2 and MMP-9

Identifiers

PMID23537951
PMCPMC3742563
OpenAlexW2057785271

What OpenQuestion holds

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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.