Evidence map›Paper›PMID 26995494›Full record

ArticleBrain research2016

High-dose estrogen treatment at reperfusion reduces lesion volume and accelerates recovery of sensorimotor function after experimental ischemic stroke.

Randall S Carpenter, Ifeanyi Iwuchukwu, Cyrus L Hinkson, Sydney Reitz, Wonhee Lee, Ayaka Kukino, An Zhang, Martin M Pike, Agnieszka A Ardelt

Open access · greenAbstract read
In one paragraph

Article in Brain research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 13% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 21 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Review
  6. Article
  7. Article
  8. Article
  9. Steroids in Stroke with Special Reference to Progesterone.Cellular and molecular neurobiology · 2019
    Review
  10. Article
  11. Article
  12. Article
  13. Article
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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

9 authors at 2 institutions in 1 country.

Randall S CarpenterDepartment of Neurology, University of Chicago, Chicago, IL, USA.
Ifeanyi IwuchukwuDepartment of Neurology, University of Chicago, Chicago, IL, USA.
Cyrus L HinksonThe College, University of Chicago, Chicago, IL, USA.
Sydney ReitzThe College, University of Chicago, Chicago, IL, USA.
Wonhee LeeThe College, University of Chicago, Chicago, IL, USA.
Ayaka KukinoAdvanced Imaging Research Center, Oregon Health Sciences University, Portland, OR, USA.
An ZhangDepartment of Neurology, University of Chicago, Chicago, IL, USA.
Martin M PikeAdvanced Imaging Research Center, Oregon Health Sciences University, Portland, OR, USA.
Agnieszka A ArdeltDepartment of Neurology, University of Chicago, Chicago, IL, USA. Electronic address: aardelt@bsd.uchicago.edu.
University of Chicago · USAdvanced Imaging Research (United States) · US

Funding

TRANSLATIONAL RESEARCH UNIVERSITY OF CHICAGO: CLINICAL TRIALSUL1RR024999 · NCRR · UNIVERSITY OF CHICAGO · PI SOLWAY, JULIAN · 2007 to 2011
$25.3M
Re-Engineering Translational Research at the University of ChicagoUL1TR000430 · NCATS · UNIVERSITY OF CHICAGO · PI SOLWAY, JULIAN · 2012 to 2016
$20.2M
Role of Estrogen and Angiogenesis in Stroke Prevention.K08NS050167 · NINDS · UNIVERSITY OF CHICAGO · PI ARDELT, AGNIESZKA ANNA · 2005 to 2009
$880k
Inhibition of Autophagy Enhances Anti-Angiogenic Efficacy in Intracranial GliomaR21CA167302 · NCI · OREGON HEALTH & SCIENCE UNIVERSITY · PI PIKE, MARTIN M · 2012 to 2013
$358k
NCATS NIH HHS UL1 TR000430NCI NIH HHS R21 CA167302NCRR NIH HHS UL1 RR024999NINDS NIH HHS K08 NS050167
6 · The paper itself

Abstract

Estrogens have previously been shown to protect the brain against acute ischemic insults, by potentially augmenting cerebrovascular function after ischemic stroke. The current study hypothesized that treatment with sustained release of high-dose 17β-estradiol (E2) at the time of reperfusion from middle cerebral artery occlusion (MCAO) in rats would attenuate reperfusion injury, augment post-stroke angiogenesis and cerebral blood flow, and attenuate lesion volume. Female Wistar rats underwent ovariectomy, followed two weeks later by transient, two-hour right MCAO (tMCAO) and treatment with E2 (n=13) or placebo (P; n=12) pellets starting at reperfusion. E2 treatment resulted in significantly smaller total lesion volume, smaller lesions within striatal and cortical brain regions, and less atrophy of the ipsilateral hemisphere after six weeks of recovery. E2-treated animals exhibited accelerated recovery of contralateral forelimb sensorimotor function in the cylinder test. Magnetic resonance imaging (MRI) showed that E2 treatment reduced the formation of lesion cysts, decreased lesion volume, and increased lesional cerebral blood flow (CBF). K(trans), a measure of vascular permeability, was increased in the lesions. This finding, which represents lesion neovascularization, was not altered by E2 treatment. Ischemic stroke-related angiogenesis and vessel formation was confirmed with immunolabeling of brain tissue and was not altered with E2 treatment. In summary, E2 treatment administered immediately following reperfusion significantly reduced lesion size, cyst formation, and brain atrophy while improving lesional CBF and accelerating recovery of functional deficits in a rat model of ischemic stroke.

Indexed as

AnimalsBrainBrain IschemiaCerebrovascular CirculationDisease Models, AnimalDrug Evaluation, PreclinicalDrug ImplantsEstradiolFemaleForelimbMotor ActivityNeuroprotective AgentsOvariectomyRandom AllocationRats, WistarRecovery of FunctionDrug ImplantsEstradiolNeuroprotective AgentsAngiogenesisEstradiolFunctional recoveryIschemic strokeMagnetic resonance imagingNeuroprotection

Identifiers

PMID26995494
PMCPMC4878689
OpenAlexW2298012736

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.