Evidence map›Paper›PMID 25690543›Full record

ArticleStroke2015

Astrocyte overexpression of heme oxygenase-1 improves outcome after intracerebral hemorrhage.

Jing Chen-Roetling, Wei Song, Hyman M Schipper, Christopher S Regan, Raymond F Regan

Open access · greenAbstract read
In one paragraph

Article in Stroke, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
3.3field-weighted citation impact, top 8% 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

35 citing papers in PubMed, 45 citations in OpenAlex.

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  13. Potential therapeutic effects of Nrf2 activators on intracranial hemorrhage.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2021
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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

5 authors at 1 institution in 1 country.

Jing Chen-RoetlingFrom the Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA (J.C.-R., C.S.R., R.F.R.); and Lady Davis Institute, Jewish General Hospital, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada (W.S., H.M.S.).
Wei SongFrom the Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA (J.C.-R., C.S.R., R.F.R.); and Lady Davis Institute, Jewish General Hospital, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada (W.S., H.M.S.).
Hyman M SchipperFrom the Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA (J.C.-R., C.S.R., R.F.R.); and Lady Davis Institute, Jewish General Hospital, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada (W.S., H.M.S.).
Christopher S ReganFrom the Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA (J.C.-R., C.S.R., R.F.R.); and Lady Davis Institute, Jewish General Hospital, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada (W.S., H.M.S.).
Raymond F ReganFrom the Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA (J.C.-R., C.S.R., R.F.R.); and Lady Davis Institute, Jewish General Hospital, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada (W.S., H.M.S.). Raymond.Regan@jefferson.edu.
Thomas Jefferson University · US

Funding

X-Ray Crystallography and Macromolecular CharacterizationP30CA056036 · NCI · THOMAS JEFFERSON UNIVERSITY · PI DANIEL P SILVER · 1995 to 2026
$94.8M
Protective Effect of Hemin Preconditioning after Intracerebral HemorrhageR01NS079500 · NINDS · THOMAS JEFFERSON UNIVERSITY · PI REGAN, RAYMOND F · 2012 to 2015
$1.3M
Canadian Institutes of Health ResearchNCI NIH HHS P30 CA056036NINDS NIH HHS R01 NS079500NINDS NIH HHS R01NS079500
6 · The paper itself

Abstract

background and purposeHeme oxygenase-1 (HO-1) catalyzes the rate-limiting reaction of heme breakdown and may have both antioxidant and pro-oxidant effects. In previous studies, HO-1 overexpression protected astrocytes from heme-mediated injury in vitro. In the present study, we tested the hypothesis that selective astrocyte overexpression of HO-1 improves outcome after intracerebral hemorrhage.

methodsMale and female transgenic mice overexpressing human HO-1 driven by the GFAP promoter (GFAP.HMOX1) and wild-type controls received striatal injections of autologous blood (25 μL). Blood-brain barrier disruption was assessed by Evans blue assay and striatal cell viability by methylthiazolyldiphenyl-tetrazolium bromide assay. Neurological deficits were quantified by digital analysis of spontaneous cage activity, adhesive removal, and elevated body swing tests.

resultsMortality rate for wild-type mice was 34.8% and was similar for males and females; all GFAP.HMOX1 mice survived. Striatal Evans blue leakage at 24 hours was 23.4±3.2 ng in surviving wild-type mice, compared with 10.9±1.8 ng in transgenics. Perihematomal cell viability was reduced to 61±4% of contralateral at 3 days in wild-type mice, versus 80±4% in transgenics. Focal neurological deficits were significantly reduced and spontaneous cage activity was increased in GFAP.HMOX1 mice.

conclusionsSelective HO-1 overexpression in astrocytes reduces mortality, blood-brain barrier disruption, perihematomal cell injury, and neurological deficits in an autologous blood injection intracerebral hemorrhage model. Genetic or pharmacological therapies that acutely increase astrocyte HO-1 may be beneficial after intracerebral hemorrhage.

Indexed as

AnimalsAstrocytesCerebral HemorrhageFemaleGlial Fibrillary Acidic ProteinHeme Oxygenase-1MaleMiceMice, TransgenicNerve Tissue ProteinsGlial Fibrillary Acidic Proteinglial fibrillary astrocytic protein, mouseHeme Oxygenase-1HMOX1 protein, humanNerve Tissue Proteinsblood–brain barrierheme oxygenase (decyclizing)ischemic preconditioningstroke

Identifiers

PMID25690543
PMCPMC4373967
OpenAlexW2169185975

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.