Evidence map›Paper›PMID 19604096›Full record

ArticleJournal of neurotrauma2009

Key role of sulfonylurea receptor 1 in progressive secondary hemorrhage after brain contusion.

J Marc Simard, Michael Kilbourne, Orest Tsymbalyuk, Cigdem Tosun, John Caridi, Svetlana Ivanova, Kaspar Keledjian, Grant Bochicchio, Volodymyr Gerzanich

Open access · hybridAbstract read
In one paragraph

Article in Journal of neurotrauma, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 82 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
82citing papers in PubMed, 2 pooled it
3.7field-weighted citation impact, top 7% 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

82 citing papers in PubMed, 2 syntheses or guidelines pooled it, 155 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Trial
  5. Trial
  6. Neuropathologic Autopsy Findings in Pediatric Sepsis: A Two-Center, Retrospective Study.Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies · 2026
    Article
  7. Review
  8. Article
  9. Review
  10. A Mouse Model of Temporal Lobe Contusion.Journal of neurotrauma · 2025
    Article
  11. Review
  12. Review
  13. Review
  14. Review
  15. Review
  16. Article
  17. Glibenclamide for Brain Contusions: Contextualizing a Promising Clinical Trial Design that Leverages an Imaging-Based TBI Endotype.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2023
    Review
  18. Edema after CNS Trauma: A Focus on Spinal Cord Injury.International journal of molecular sciences · 2023
    Review
  19. Review
  20. Article

22 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

9 authors at 2 institutions in 1 country.

J Marc SimardDepartment of Neurosurgery, University of Maryland School of Medicine, Baltimore, Maryland, USA. msimard@smail.umaryland.edu
Michael Kilbourne
Orest Tsymbalyuk
Cigdem Tosun
John Caridi
Svetlana Ivanova
Kaspar Keledjian
Grant Bochicchio
Volodymyr Gerzanich
University of Maryland, Baltimore · USWalter Reed Army Institute of Research · US

Funding

Sulfonylurea receptor 1 (SUR1)- A novel therapeutic target in ischemic strokeR01HL082517 · NHLBI · UNIVERSITY OF MARYLAND BALTIMORE · PI SIMARD, J. MARC · 2006 to 2021
$5.6M
TRPM4 channel in spinal cord injuryR01NS061934 · NINDS · UNIVERSITY OF MARYLAND BALTIMORE · PI GERZANICH, VLADIMIR · 2008 to 2018
$3.3M
Pathological role of the SUR1-regulated NC(Ca-ATP) channel in cortex after subaraR01NS061808 · NINDS · UNIVERSITY OF MARYLAND BALTIMORE · PI SIMARD, J. MARC · 2009 to 2013
$1.6M
NHLBI NIH HHS HL082517NINDS NIH HHS NS060801NINDS NIH HHS NS061808NINDS NIH HHS NS061934
6 · The paper itself

Abstract

An important but poorly understood feature of traumatic brain injury (TBI) is the clinically serious problem of spatiotemporal progression ("blossoming") of a hemorrhagic contusion, a phenomenon we term progressive secondary hemorrhage (PSH). Molecular mechanisms of PSH are unknown and efforts to reduce it by promoting coagulation have met with equivocal results. We hypothesized that PSH might be due to upregulation and activation of sulfonylurea receptor 1 (SUR1)-regulated NC(Ca-ATP) channels in capillary endothelial cells, predisposing to oncotic death of endothelial cells and catastrophic failure of capillary integrity. Anesthetized adult male rats underwent left parietal craniectomy for induction of a focal cortical contusion. The regulatory subunit of the channel, SUR1, was prominently upregulated in capillaries of penumbral tissues surrounding the contusion. In untreated rats, PSH was characterized by progressive enlargement of the contusion deep into the site of cortical impact, including corpus callosum, hippocampus, and thalamus, by progressive accumulation of extravasated blood, with a doubling of the volume during the first 12 h after injury, and by capillary fragmentation in penumbral tissues. Block of SUR1 using low-dose (non-hypoglycemogenic) glibenclamide largely eliminated PSH and capillary fragmentation, and was associated with a significant reduction in the size of the necrotic lesion and in preservation of neurobehavioral function. Antisense oligodeoxynucleotide against SUR1, administered after injury, reduced both SUR1 expression and PSH, consistent with a requirement for transcriptional upregulation of SUR1. Our findings provide novel insights into molecular mechanisms responsible for PSH associated with hemorrhagic contusions, and point to SUR1 as a potential therapeutic target in TBI.

Indexed as

AnimalsATP-Binding Cassette TransportersBlood-Brain BarrierBrainBrain Hemorrhage, TraumaticBrain InjuriesCalcium ChannelsDisease Models, AnimalDown-RegulationEndothelial CellsGlyburideHypoglycemic AgentsMaleNeuroprotective AgentsOligodeoxyribonucleotides, AntisensePotassium Channels, Inwardly RectifyingAbcc8 protein, ratATP-Binding Cassette TransportersCalcium ChannelsGlyburideHypoglycemic AgentsNeuroprotective AgentsOligodeoxyribonucleotides, AntisensePotassium Channels, Inwardly RectifyingReceptors, DrugSulfonylurea Receptors

Identifiers

PMID19604096
PMCPMC2824216
OpenAlexW2030861304

What OpenQuestion holds

Textmetadata
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.