Evidence map›Paper›PMID 36718979›Full record

ArticleEpilepsia open2023

Sex-based structural and functional MRI outcomes in the rat brain after soman (GD) exposure-induced status epilepticus.

Meghan Gage, Suraj S Vasanthi, Christina M Meyer, Nikhil S Rao, Daniel R Thedens, Sridhar S Kannurpatti, Thimmasettappa Thippeswamy

Open access · goldAbstract read
In one paragraph

Article in Epilepsia open, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
2.7field-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

9 citing papers in PubMed, 11 citations in OpenAlex.

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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

7 authors at 3 institutions in 1 country.

Meghan GageDepartment of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA.
Suraj S VasanthiDepartment of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA.
Christina M MeyerDepartment of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA.
Nikhil S RaoDepartment of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA.
Daniel R ThedensDepartment of Radiology, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA.
Sridhar S KannurpattiDepartment of Radiology, Rutgers Biomedical and Health Sciences, New Jersey Medical School, Newark, New Jersey, USA.
Thimmasettappa ThippeswamyDepartment of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA.ORCID 0000-0002-9326-1896
Iowa State University · USRutgers, The State University of New Jersey · USUniversity of Iowa · US

Funding

Pulmonary Toxicology Facility CoreP30ES005605 · NIEHS · UNIVERSITY OF IOWA · PI Jong Sung Kim · 1990 to 2026
$40.5M
Saracatinib and 1400W Counteract Nerve Agents-Induced Long-Term NeurotoxicityU01NS117284 · NINDS · IOWA STATE UNIVERSITY · PI THIPPESWAMY, THIMMASETTAPPA · 2021 to 2025
$3.9M
NIEHS NIH HHS P30 ES005605NINDS NIH HHS U01 NS117284
6 · The paper itself

Abstract

objectiveExposure to the nerve agent, soman (GD), induces status epilepticus (SE), epileptogenesis, and even death. Although rodent models studying the pathophysiological mechanisms show females to be more reactive to soman, no tangible sex differences in brains postexposure have been reported. In this study, we used multimodal imaging using MRI in adult rats to determine potential sex-based biomarkers of soman effects.

methodsMale and female Sprague Dawley rats were challenged with 1.2 × LD

resultsDespite no significant sex differences in the initial SE severity after soman exposure, long-term MRI-based structural and functional differences were evident in the brains of both sexes. While T2 MRI showed lesser soman-induced neurodegeneration, large areas of T1 enhancements occurred in females than in males, indicating a distinct pathophysiology unrelated to neurodegeneration. fMRI-based resting-state functional connectivity (RSFC), indicated greater reductions in soman-exposed females than in males, associating with the T1 enhancements (unrelated to neurodegeneration) rather than T2-hyperintensity or T1-hypointensity (representing neurodegeneration). The wider T1 enhancements associating with the decreased spontaneous neuronal activity in multiple resting-state networks in soman-exposed females than males suggest that neural changes unrelated to cellular atrophy impinge on brain function postexposure. Taken together with lower spontaneous neural activity in soman-exposed females, the results indicate some form of neuroprotective state that was not present in males. SIGNIFICANCE: The results indicate that endpoints other than neurodegeneration may need to be considered to translate sex-based nerve agent effects in humans.

Indexed as

Nerve AgentsSomanStatus EpilepticusAnimalsBrainFemaleHumansMagnetic Resonance ImagingMaleRatsRats, Sprague-DawleyNerve AgentsSomanepilepsyMRI resting statenerve agentneurodegenerationstatus epilepticus

Identifiers

PMID36718979
PMCPMC10235578
OpenAlexW4318669510

What Socratic holds

Textmetadata
LicenceCC BY-NC-ND
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 Socratic graph.