Evidence map›Paper›PMID 33735460›Full record

ArticleEpilepsia2021

Defining the latent period of epileptogenesis and epileptogenic zone in a focal cortical dysplasia type II (FCDII) rat model.

Hsin-Yi Kao, Shuntong Hu, Temenuzhka Mihaylova, Julie Ziobro, EunSeon Ahn, Carli Fine, David Brang, Brendon O Watson, Yu Wang

Open access · hybridAbstract read
In one paragraph

Article in Epilepsia, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
1.1field-weighted citation impact, top 26% 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

7 citing papers in PubMed, 19 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

9 authors at 2 institutions in 2 countries.

Hsin-Yi KaoDepartment of Neurology, University of Michigan, Ann Arbor, USA.ORCID 0000-0002-7525-983X
Shuntong HuDepartment of Neurology, University of Michigan, Ann Arbor, USA.ORCID 0000-0001-9179-7411
Temenuzhka MihaylovaDepartment of Neurology, University of Michigan, Ann Arbor, USA.
Julie ZiobroDepartment of Pediatrics, University of Michigan, Ann Arbor, USA.
EunSeon AhnDepartment of Psychology, University of Michigan, Ann Arbor, USA.
Carli FineDepartment of Psychology, University of Michigan, Ann Arbor, USA.
David BrangDepartment of Psychology, University of Michigan, Ann Arbor, USA.
Brendon O WatsonDepartment of Psychiatry, University of Michigan, Ann Arbor, USA.
Yu WangDepartment of Neurology, University of Michigan, Ann Arbor, USA.ORCID 0000-0002-2489-1288
University of Michigan · USCentral South University · CN

Funding

Proteins to Cell SystemsU54NS117170 · NINDS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI ISOM, LORI L., PARENT, JACK M · 2020 to 2024
$11.9M
Advancing Child Health Through Cellular and Molecular BiologyK12HD028820 · NICHD · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI Donna M. Martin · 2002 to 2026
$9.2M
Cortical development and pathogenesis in DEPDC5-related epilepsiesR01NS113824 · NINDS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI WANG, YU · 2019 to 2023
$1.8M
Mechanisms and Models of SPTAN1 Epileptic EncephalopathyK08NS099379 · NINDS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI WANG, YU · 2017 to 2021
$972k
NICHD NIH HHS K12 HD028820NINDS NIH HHS K08 NS099379NINDS NIH HHS R01 NS113824NINDS NIH HHS U54 NS117170
6 · The paper itself

Abstract

objectivesFocal cortical dysplasia type II (FCDII) is one of the most common underlying pathologies in patients with drug-resistant epilepsy. However, mechanistic understanding of FCDII fails to keep pace with genetic discoveries, primarily due to the significant challenge in developing a clinically relevant animal model. Conceptually and clinically important questions, such as the unknown latent period of epileptogenesis and the controversial epileptogenic zone, remain unknown in all experimental FCDII animal models, making it even more challenging to investigate the underlying epileptogenic mechanisms.

methodsIn this study, we used continuous video-electroencephalography (EEG) monitoring to detect the earliest interictal and ictal events in a clustered regularly interspaced short palindromic repeats (CRISPR)-in utero electroporation (IUE) FCDII rat model that shares genetic, pathological, and electroclinical signatures with those observed in humans. We then took advantage of in vivo local field potential (LFP) recordings to localize the epileptogenic zone in these animals.

resultsTo the best of our knowledge, we showed for the first time that epileptiform discharges emerged during the third postnatal week, and that the first seizure occurred as early as during the fourth postnatal week. We also showed that both interictal and ictal discharges are localized within the dysplastic cortex, concordant with human clinical data. SIGNIFICANCE: Together, our work identified the temporal and spatial frame of epileptogenesis in a highly clinically relevant FCDII animal model, paving the way for mechanistic studies at molecular, cellular, and circuitry levels.

Indexed as

Disease Models, AnimalAnimalsBrainEpilepsyHumansMalformations of Cortical Development, Group IRatsepileptogenic zoneFCDIIlatent period

Identifiers

PMID33735460
PMCPMC8211029
OpenAlexW3139037835

What OpenQuestion holds

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Registered trials

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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.