Evidence map›Paper›PMID 27802245›Full record

ArticleRestorative neurology and neuroscience2016

Progesterone treatment shows greater protection in brain vs. retina in a rat model of middle cerebral artery occlusion: Progesterone receptor levels may play an important role.

Rachael S Allen, Iqbal Sayeed, Yuliya Oumarbaeva, Katherine C Morrison, Paul H Choi, Machelle T Pardue, Donald G Stein

Open access · greenAbstract read
In one paragraph

Article in Restorative neurology and neuroscience, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
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

20 citing papers in PubMed, 33 citations in OpenAlex.

  1. Article
  2. The potential role of amino acids in myopia: inspiration from metabolomics.Metabolomics : Official journal of the Metabolomic Society · 2024
    Review
  3. Neurosteroid Receptor Modulators for Treating Traumatic Brain Injury.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2023
    Review
  4. Review
  5. Review
  6. Article
  7. Article
  8. Review
  9. Article
  10. Progesterone in the Brain: Hormone, Neurosteroid and Neuroprotectant.International journal of molecular sciences · 2020
    Review
  11. Review
  12. Article
  13. Article
  14. Review
  15. Eye Opener in Stroke.Stroke · 2019
    Article
  16. Steroids in Stroke with Special Reference to Progesterone.Cellular and molecular neurobiology · 2019
    Review
  17. Article
  18. Article
  19. Neuroprotective strategies for retinal disease.Progress in retinal and eye research · 2018
    Review
  20. Article
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 2 institutions in 1 country.

Rachael S AllenDepartment of Emergency Medicine, Emory University, Atlanta, GA, USA.
Iqbal SayeedDepartment of Emergency Medicine, Emory University, Atlanta, GA, USA.
Yuliya OumarbaevaDepartment of Emergency Medicine, Emory University, Atlanta, GA, USA.
Katherine C MorrisonDepartment of Emergency Medicine, Emory University, Atlanta, GA, USA.
Paul H ChoiDepartment of Emergency Medicine, Emory University, Atlanta, GA, USA.
Machelle T PardueDepartment of Ophthalmology, Emory University, Atlanta, GA, USA.
Donald G SteinDepartment of Emergency Medicine, Emory University, Atlanta, GA, USA.
Emory University · USAtlanta VA Medical Center · US

Funding

P30-Core Grant for Vision Research Core CP30EY006360 · NEI · EMORY UNIVERSITY · PI NICKERSON, JOHN M · 1986 to 2025
$15.3M
VIsion Science Training in AtlantaT32EY007092 · NEI · EMORY UNIVERSITY · PI Machelle T. Pardue · 1985 to 2026
$4.6M
NEI NIH HHS P30 EY006360NEI NIH HHS T32 EY007092
6 · The paper itself

Abstract

BACKGROUND/

objectiveTo determine whether inflammation increases in retina as it does in brain following middle cerebral artery occlusion (MCAO), and whether the neurosteroid progesterone, shown to have protective effects in both retina and brain after MCAO, reduces inflammation in retina as well as brain.

methodsMCAO rats treated systemically with progesterone or vehicle were compared with shams. Protein levels of cytosolic NF-κB, nuclear NF-κB, phosphorylated NF-κB, IL-6, TNF-α, CD11b, progesterone receptor A and B, and pregnane X receptor were assessed in retinas and brains at 24 and 48 h using western blots.

resultsFollowing MCAO, significant increases were observed in the following inflammatory markers: pNF-κB and CD11b at 24 h in both brain and retina, nuclear NF-κB at 24 h in brain and 48 h in retina, and TNF-α at 24 h in brain.Progesterone treatment in MCAO animals significantly attenuated levels of the following markers in brain: pNF-κB, nuclear NF-κB, IL-6, TNF-α, and CD11b, with significantly increased levels of cytosolic NF-κB. Retinas from progesterone-treated animals showed significantly reduced levels of nuclear NF-κB and IL-6 and increased levels of cytosolic NF-κB, with a trend for reduction in other markers. Post-MCAO, progesterone receptors A and B were upregulated in brain and downregulated in retina.

conclusionInflammatory markers increased in both brain and retina after MCAO, with greater increases observed in brain. Progesterone treatment reduced inflammation, with more dramatic reductions observed in brain than retina. This differential effect may be due to differences in the response of progesterone receptors in brain and retina after injury.

Indexed as

AnimalsBrainCytokinesDisease Models, AnimalGene Expression RegulationInfarction, Middle Cerebral ArteryMaleNeuroprotective AgentsPeroxisome-Targeting Signal 1 ReceptorProgesteroneRatsRats, Sprague-DawleyReceptors, ProgesteroneRetinaSignal TransductionTime FactorsCytokinesNeuroprotective AgentsPeroxisome-Targeting Signal 1 ReceptorProgesteroneReceptors, ProgesteroneFocal ischemiainflammationmiddle cerebral artery occlusionNF-kBprogesteroneprogesterone receptorratretinaretinal ischemia

Identifiers

PMID27802245
PMCPMC5971089
OpenAlexW2530816782

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.