Evidence map›Paper›PMID 17109824›Full record

ArticleBrain research2007

Injured Fluoro-Jade-positive hippocampal neurons contain high levels of zinc after traumatic brain injury.

Helen L Hellmich, Kristine A Eidson, Bridget A Capra, Jeanna M Garcia, Deborah R Boone, Bridget E Hawkins, Tatsuo Uchida, Douglas S Dewitt, Donald S Prough

Open access · greenAbstract read
In one paragraph

Article in Brain research, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
2.9field-weighted citation impact, top 10% 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

27 citing papers in PubMed, 57 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Review
  5. Zinc in the Brain: Friend or Foe?International journal of molecular sciences · 2020
    Review
  6. Zinc and Traumatic Brain Injury: From Chelation to Supplementation.Medical sciences (Basel, Switzerland) · 2020
    Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Review
  18. 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 1 institution in 1 country.

Helen L HellmichDepartment of Anesthesiology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555-0830, USA. hhellmic@utmb.edu
Kristine A Eidson
Bridget A Capra
Jeanna M Garcia
Deborah R Boone
Bridget E Hawkins
Tatsuo Uchida
Douglas S Dewitt
Donald S Prough
The University of Texas Medical Branch at Galveston · US

Funding

Molecular Mechanisms of Environmental InjuryT32ES007254 · NIEHS · UNIVERSITY OF TEXAS MEDICAL BR GALVESTON · PI AMEREDES, BILL T · 1990 to 2022
$6.6M
Zinc Neurotoxicity in Traumatic Brain InjuryR01NS042849 · NINDS · UNIVERSITY OF TEXAS MEDICAL BR GALVESTON · PI PROUGH, DONALD SANDERSON · 2002 to 2006
$1.8M
NIEHS NIH HHS T32 ES007254NINDS NIH HHS R01 NS042849NINDS NIH HHS R01 NS042849-01A1
6 · The paper itself

Abstract

Hippocampal damage contributes to cognitive dysfunction after traumatic brain injury (TBI). We previously showed that Fluoro-Jade, a fluorescent stain that labels injured, degenerating brain neurons, quantifies the extent of hippocampal injury after experimental fluid percussion TBI in rats. Coincidentally, we observed that injured neurons in the rat hippocampus also stained with Newport Green, a fluorescent dye specific for free ionic zinc. Here, we show that, regardless of injury severity or therapeutic intervention, the post-TBI population of injured neurons in rat hippocampal subfields CA1, CA3 and dentate gyrus is indistinguishable, both in numbers and anatomical distribution, from the population of neurons containing high levels of zinc. Treatment with lamotrigine, which inhibits presynaptic release of glutamate and presumably zinc that is co-localized with glutamate, reduced numbers of Fluoro-Jade-positive and Newport Green-positive neurons equally as did treatment with nicardipine, which blocks voltage-gated calcium channels through which zinc enters neurons. To confirm using molecular techniques that Fluoro-Jade and Newport Green-positive neurons are equivalent populations, we isolated total RNA from 25 Fluoro-Jade-positive and 25 Newport Green-positive pyramidal neurons obtained by laser capture microdissection (LCM) from the CA3 subfield, linearly amplified the mRNA and used quantitative ribonuclease protection analysis to demonstrate similar expression of mRNA for selected TBI-induced genes. Our data suggest that therapeutic interventions aimed at reducing neurotoxic zinc levels after TBI may reduce hippocampal neuronal injury.

Indexed as

AnimalsBrain InjuriesCalcium Channel BlockersCalcium ChannelsCell CountCognition DisordersColoring AgentsDisease Models, AnimalFluoresceinsFluorescent DyesGene Expression RegulationHippocampusMaleNerve Tissue ProteinsNeuronsOrganic ChemicalsCalcium Channel BlockersCalcium ChannelsColoring AgentsFluoresceinsFluorescent Dyesfluoro jadeNerve Tissue ProteinsOrganic ChemicalsRNA, MessengerZinc

Identifiers

PMID17109824
PMCPMC2896019
OpenAlexW1991929148

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.