Evidence map›Paper›PMID 34114049›Full record

ArticleInternational journal of legal medicine2021

GFAP positivity in neurons following traumatic brain injuries.

Johann Zwirner, Julia Lier, Heike Franke, Niels Hammer, Jakob Matschke, Florian Trautz, Rexon Tse, Benjamin Ondruschka

Abstract read
In one paragraph

Article in International journal of legal medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 3 pooled it
–field-weighted citation impact
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

31 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. SGK1 upregulation in GFAPCell death & disease · 2025
    Article
  12. International journal of molecular sciences · 2025
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  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

8 authors.

Johann ZwirnerDepartment of Anatomy, University of Otago, Dunedin, New Zealand. medijo@gmx.de.ORCID http://orcid.org/0000-0002-3560-3915
Julia LierInstitute of Anatomy, University of Leipzig, Leipzig, Germany.
Heike FrankeRudolf Boehm Institute of Pharmacology and Toxicology, University of Leipzig, Leipzig, Germany.
Niels HammerInstitute of Macroscopic and Clinical Anatomy, University of Graz, Graz, Austria.
Jakob MatschkeInstitute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Florian TrautzInstitute of Legal Medicine, University of Leipzig, Leipzig, Germany.
Rexon TseDepartment of Forensic Pathology, LabPLUS, Auckland City Hospital, Auckland, New Zealand.
Benjamin OndruschkaInstitute of Legal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany. b.ondruschka@uke.de.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Glial fibrillary acidic protein (GFAP) is a well-established astrocytic biomarker for the diagnosis, monitoring and outcome prediction of traumatic brain injury (TBI). Few studies stated an accumulation of neuronal GFAP that was observed in various brain pathologies, including traumatic brain injuries. As the neuronal immunopositivity for GFAP in Alzheimer patients was shown to cross-react with non-GFAP epitopes, the neuronal immunopositivity for GFAP in TBI patients should be challenged. In this study, cerebral and cerebellar tissues of 52 TBI fatalities and 17 controls were screened for immunopositivity for GFAP in neurons by means of immunohistochemistry and immunofluorescence. The results revealed that neuronal immunopositivity for GFAP is most likely a staining artefact as negative controls also revealed neuronal GFAP staining. However, the phenomenon was twice as frequent for TBI fatalities compared to non-TBI control cases (12 vs. 6%). Neuronal GFAP staining was observed in the pericontusional zone and the ipsilateral hippocampus, but was absent in the contralateral cortex of TBI cases. Immunopositivity for GFAP was significantly correlated with the survival time (r = 0.306, P = 0.015), but no correlations were found with age at death, sex nor the post-mortem interval in TBI fatalities. This study provides evidence that the TBI-associated neuronal immunopositivity for GFAP is indeed a staining artefact. However, an absence post-traumatic neuronal GFAP cannot readily be assumed. Regardless of the particular mechanism, this study revealed that the artefact/potential neuronal immunopositivity for GFAP is a global, rather than a regional brain phenomenon and might be useful for minimum TBI survival time determinations, if certain exclusion criteria are strictly respected.

Indexed as

Brain Injuries, TraumaticGlial Fibrillary Acidic ProteinNeuronsBiomarkersBrainHumansImmunohistochemistryBiomarkersGlial Fibrillary Acidic ProteinGlial fibrillary acidic proteinImmunofluorescenceImmunohistochemistryNeuronTraumatic brain injury

Identifiers

PMID34114049
PMCPMC8523453

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.