Evidence map›Paper›PMID 34399800›Full record

ArticleFluids and barriers of the CNS2021

Impact of sex differences on thrombin-induced hydrocephalus and white matter injury: the role of neutrophils.

Kang Peng, Sravanthi Koduri, Fan Xia, Feng Gao, Ya Hua, Richard F Keep, Guohua Xi

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in Fluids and barriers of the CNS, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.1field-weighted citation impact, top 11% 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

17 citing papers in PubMed, 25 citations in OpenAlex.

  1. Review
  2. Article
  3. Mechanisms of hydrocephalus after intraventricular haemorrhage: a review.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2024
    Review
  4. Review
  5. Article
  6. Article
  7. Article
  8. Review
  9. Review
  10. Review
  11. The Fate of Erythrocytes after Cerebral Hemorrhage.Translational stroke research · 2022
    Review
  12. Review
  13. Article
  14. Article
  15. Review
  16. Article
  17. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Kang PengDepartment of Neurosurgery, University of Michigan, R5018 Biomedical Science Research Building, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA.
Sravanthi KoduriDepartment of Neurosurgery, University of Michigan, R5018 Biomedical Science Research Building, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA.
Fan XiaDepartment of Neurosurgery, University of Michigan, R5018 Biomedical Science Research Building, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA.
Feng GaoDepartment of Neurosurgery, University of Michigan, R5018 Biomedical Science Research Building, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA.
Ya HuaDepartment of Neurosurgery, University of Michigan, R5018 Biomedical Science Research Building, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA.
Richard F KeepDepartment of Neurosurgery, University of Michigan, R5018 Biomedical Science Research Building, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA.
Guohua XiDepartment of Neurosurgery, University of Michigan, R5018 Biomedical Science Research Building, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA. guohuaxi@umich.edu.ORCID http://orcid.org/0000-0003-2846-5937
University of Michigan · USCentral South University · CN

Funding

Experimental Cerebral Hemorrhage: Mechanisms and TherapiesR35NS116786 · NINDS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI XI, GUOHUA · 2020 to 2024
$5.2M
Early hematoma lysis and hemoglobin toxicity in intracerebral hemorrhageR01NS106746 · NINDS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI KEEP, RICHARD F · 2018 to 2022
$2.5M
NINDS NIH HHS NS-116786NINDS NIH HHS R01 NS106746NINDS NIH HHS R35 NS116786
6 · The paper itself

Abstract

backgroundThrombin has been implicated in playing a role in hydrocephalus development following intraventricular hemorrhage (IVH). However, the mechanisms underlying the sex differences to the detrimental effects of thrombin post-IVH remain elusive.

methodThree-month old male and female Sprague-Dawley rats underwent unilateral intracerebroventricular (ICV) injections of 3U or 5U thrombin, or saline, to examine differences in thrombin-induced hydrocephalus and white matter injury. Mortality, and lateral ventricle volume and white matter injury were measured on magnetic resonance imaging evaluation at 24 h post-injection. In addition, male rats were pretreated with 17-β estradiol (E2, 5 mg/kg) or vehicle at 24 and 2 h prior to ICV injection of 3U thrombin. All rats were euthanized at 24 h post-injection for histology and immunohistochemistry.

resultsICV injection of 5U thrombin caused 100 and 0% mortality in female and male rats, respectively. 3U of thrombin resulted in significant ventricular dilation and white matter damage at 24 h in both male and female rats, but both were worse in females (p < 0.05). Furthermore, neutrophil infiltration into choroid plexus and periventricular white matter was enhanced in female rats and may play a critical role in the sex difference in brain injury. Pre-treating male rats with E2, increased thrombin (3U)-induced hydrocephalus, periventricular white matter injury and neutrophil infiltration into the choroid plexus and white matter.

conclusionsICV thrombin injection induced more severe ventricular dilation and white matter damage in female rats compared to males. Estrogen appears to contribute to this difference which may involve greater neutrophil infiltration in females. Understanding sex differences in thrombin-induced brain injury may shed light on future interventions for hemorrhagic stroke.

Indexed as

Sex CharacteristicsAnimalsCerebral VentriclesChoroid PlexusFemaleHydrocephalusInjections, IntraventricularMaleNeutrophilsRatsRats, Sprague-DawleyThrombinWhite MatterThrombinFemaleHydrocephalusMaleNeutrophilsThrombinWhite matter injury

Identifiers

PMID34399800
PMCPMC8365969
OpenAlexW3195427377

What OpenQuestion holds

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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.