Numbers of Granule Cells and GABAergic Boutons Are Correlated in Shrunken Sclerotic Hippocampi of Sea Lions with Temporal Lobe Epilepsy.
Overview
- Department of Comparative Medicine, Stanford University, Palo Alto, California 94304
- The Marine Mammal Center, Sausalito, California 94965
- Department of Neurology & Neurological Sciences, Stanford University, Palo Alto, California 94304
Abstract
A possible mechanism of temporal lobe epilepsy is insufficient inhibition of hippocampal dentate granule cells. Precipitating injuries that kill interneurons in the dentate gyrus might result in fewer inhibitory synapses with granule cells. To test this hypothesis, previous studies evaluated numbers or densities of interneurons, γ-amino butyric acid (GABA)ergic boutons, and inhibitory synapses in tissue from human patients with temporal lobe epilepsy and rodent models. However, those studies have limitations. Some of those limitations can be addressed by a large animal model. Sea lions (Zalophus californianus) can develop temporal lobe epilepsy naturally. Like humans, epileptic sea lions exhibit bilateral or unilateral hippocampal sclerosis (neuron loss) with granule cell vulnerability, but sea lions permit optimal tissue preservation and sampling, and good control subjects. To label interneuron cell bodies and GABAergic synaptic boutons, sea lion hippocampal tissue from both sexes was processed with immunohistochemistry for glutamic acid decarboxylase (GAD) and vesicular GABA transporter. Stereological techniques were used to evaluate the dentate gyrus of the entire hippocampus. Numbers of granule cells, GAD cells, and GABAergic boutons were substantially reduced in shrunken, sclerotic hippocampi. However, numbers of GABAergic boutons and granule cells were correlated. These findings indicate that, despite losses, numbers of GABAergic boutons scale with numbers of surviving granule cells.
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- doi:10.5061/
dryad.t4b8gtjd5 , at Dryad; found in DataCite
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Version 1, 30 September 2026: the first record
Recorded: type, language, journal, volume, issue, pages, dates, 5 authors, 6 keywords, 14 MeSH terms, 4 funders, 85 references, 5 RRIDs.
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This paper
Wyeth, M., Krucik, D. D. R., Thorbrogger, C. J., Field, C., & Buckmaster, P. S. (2026). Numbers of Granule Cells and GABAergic Boutons Are Correlated in Shrunken Sclerotic Hippocampi of Sea Lions with Temporal Lobe Epilepsy. eNeuro, 13(3), ENEURO.0389-25.2026. https://
BibTeX
@article{wyeth2026number
author = {Wyeth, Megan and Krucik, David D. R. and Thorbrogger, Chloé J. and Field, Cara and Buckmaster, Paul S.},
title = {{Numbers of Granule Cells and GABAergic Boutons Are Correlated in Shrunken Sclerotic Hippocampi of Sea Lions with Temporal Lobe Epilepsy}},
journal = {eNeuro},
year = {2026},
month = mar,
volume = {13},
number = {3},
pages = {ENEURO.0389--25.2026},
publisher = {Society for Neuroscience},
issn = {2373-2822},
doi = {10.1523/
url = {https://
pmid = {41802862},
pmcid = {PMC13027691}
}
RIS
TY - JOUR
AU - Wyeth, Megan
AU - Krucik, David D. R.
AU - Thorbrogger, Chloé J.
AU - Field, Cara
AU - Buckmaster, Paul S.
TI - Numbers of Granule Cells and GABAergic Boutons Are Correlated in Shrunken Sclerotic Hippocampi of Sea Lions with Temporal Lobe Epilepsy
T2 - eNeuro
J2 - eNeuro
PY - 2026
DA - 2026/
VL - 13
IS - 3
SP - ENEURO.0389
EP - 25.2026
SN - 2373-2822
PB - Society for Neuroscience
DO - 10.1523/
UR - https://
LA - en
ER -
CSL-JSON
{
"id": "10.1523/
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"title": "Numbers of Granule Cells and GABAergic Boutons Are Correlated in Shrunken Sclerotic Hippocampi of Sea Lions with Temporal Lobe Epilepsy",
"container-title": "eNeuro",
"author": [
{
"family": "Wyeth",
"given": "Megan"
},
{
"family": "Krucik",
"given": "David D. R."
},
{
"family": "Thorbrogger",
"given": "Chloé J."
},
{
"family": "Field",
"given": "Cara"
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{
"family": "Buckmaster",
"given": "Paul S."
}
],
"container-title-short":
"volume": "13",
"issue": "3",
"page": "ENEURO.0389-25.2026",
"DOI": "10.1523/
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"PMCID": "PMC13027691",
"ISSN": "2373-2822",
"publisher": "Society for Neuroscience",
"URL": "https://
"language": "en",
"issued": {
"date-parts": [
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2026,
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25
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}
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