Evidence map›Paper›PMID 18635843›Full record

ArticleStroke2008

Protecting against cerebrovascular injury: contributions of 12/15-lipoxygenase to edema formation after transient focal ischemia.

Guang Jin, Ken Arai, Yoshihiro Murata, Sophia Wang, Monique F Stins, Eng H Lo, Klaus van Leyen

Open access · bronzeAbstract read
In one paragraph

Article in Stroke, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 92 papers.

0numbers the graph read from it
0cells of the map it votes in
92citing papers in PubMed
4.4field-weighted citation impact, top 5% 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

92 citing papers in PubMed, 152 citations in OpenAlex.

  1. Review
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  17. Review
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  19. Review
  20. Role of Ferroptosis in Stroke.Cellular and molecular neurobiology · 2023
    Review

32 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

7 authors at 1 institution in 1 country.

Guang JinMassachusetts General Hospital, Neuroprotection Research Laboratory, 149 13th Street, R. 2401, Charlestown, MA 02129, USA.
Ken Arai
Yoshihiro Murata
Sophia Wang
Monique F Stins
Eng H Lo
Klaus van Leyen
Johns Hopkins University · US

Funding

12-Lipoxygenase and Ischemic Brain Cell DeathR01NS049430 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI VAN LEYEN, KLAUS · 2005 to 2015
$3.6M
CD47 as a neurovascular target for stroke therapyR01NS053560 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI LO, ENG H. · 2006 to 2010
$1.9M
NINDS NIH HHS P01NS555104NINDS NIH HHS R01 NS049430NINDS NIH HHS R01NS049430NINDS NIH HHS R01 NS053560NINDS NIH HHS R01NS53560
6 · The paper itself

Abstract

background and purposeThe concept of the neurovascular unit suggests that effects on brain vasculature must be considered if neuroprotection is to be achieved in stroke. We previously reported that 12/15-lipoxygenase (12/15-LOX) is upregulated in the peri-infarct area after middle cerebral artery occlusion in mice, and 12/15-LOX contributes to brain damage after ischemia-reperfusion. The current study was designed to investigate 12/15-LOX involvement in vascular injury in the ischemic brain.

methodsIn cell culture, a human brain microvascular endothelial cell line was subjected to either hypoxia or H(2)O(2)-induced oxidative stress with or without lipoxygenase inhibitors. For in vivo studies, mice were subjected to 90 minutes middle cerebral artery occlusion, and the effects of either 12/15-LOX gene knockout or treatment with lipoxygenase inhibitors were compared. Expression of 12/15-LOX and claudin-5 as well as extravasation of immunoglobulin G were detected by immunohistochemistry. Edema was measured as water content of brain hemispheres according to the wet-dry weight method.

resultsBrain endothelial cells were protected against hypoxia and H(2)O(2) by the lipoxygenase inhibitor baicalein. After focal ischemia, 12/15-LOX was increased in neurons and endothelial cells. The vascular tight junction protein claudin-5 underwent extensive degradation in the peri-infarct area, which was partially prevented by the lipoxygenase inhibitor baicalein. Leakage of immunoglobulin G into the brain parenchyma was significantly reduced in 12/15-LOX knockout mice as well as wild-type mice treated with baicalein. Likewise, brain edema was significantly ameliorated.

conclusions12/15-LOX may contribute to ischemic brain damage not just by causing neuronal cell death, but also by detrimental effects on the brain microvasculature. 12/15-LOX inhibitors may thus be effective as both neuroprotectants and vasculoprotectants.

Indexed as

AnimalsArachidonate 12-LipoxygenaseArachidonate 15-LipoxygenaseBlood-Brain BarrierBrain EdemaBrain InfarctionBrain IschemiaCells, CulturedClaudin-5CytoprotectionEndothelial CellsEnzyme InhibitorsFlavanonesHumansHydrogen PeroxideImmunoglobulin G12-15-lipoxygenaseArachidonate 12-LipoxygenaseArachidonate 15-LipoxygenasebaicaleinClaudin-5CLDN5 protein, humanEnzyme InhibitorsFlavanonesHydrogen PeroxideImmunoglobulin GMembrane Proteins

Identifiers

PMID18635843
PMCPMC2754072
OpenAlexW2168531927

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.