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Increased Seizure Susceptibility and Up-regulation of nNOS Expression in Hippocampus Following Recurrent Early-life Seizures in Rats

This study aimed to determine the long-term change of seizure susceptibility and the role of nNOS on brain development following recurrent early-life seizures in rats. Video-EEG recordings were conducted between postnatal days 50 and 60. Alterations in seizure susceptibility were assayed on day 22 o...

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Autor principal: Kim, Doo-Kwun
Formato: Texto
Lenguaje:English
Publicado: The Korean Academy of Medical Sciences 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2877220/
https://www.ncbi.nlm.nih.gov/pubmed/20514313
http://dx.doi.org/10.3346/jkms.2010.25.6.905
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author Kim, Doo-Kwun
author_facet Kim, Doo-Kwun
author_sort Kim, Doo-Kwun
collection PubMed
description This study aimed to determine the long-term change of seizure susceptibility and the role of nNOS on brain development following recurrent early-life seizures in rats. Video-EEG recordings were conducted between postnatal days 50 and 60. Alterations in seizure susceptibility were assayed on day 22 or 50 using the flurothyl method. Changes in nNOS expression were determined by quantitative immunoblotting on day 50. On average, rats had 8.4±2.7 seizures during 10 daily 1 hr behavioral monitoring sessions. As adults (days 50-60), all rats displayed interictal spikes in the hippocampus and/or overlying cortex. Brief electrographic seizures were recorded in only one of five animals. Rats appeared to progress from a period of marked seizure susceptibility (day 22) to one of lessened seizure susceptibility (day 50). Up-regulation of nNOS expression following early-life recurrent seizures was observed on day 50. In conclusion, these data suggested that recurrent early-life seizures had the long-term effects on seizure susceptibility late in life and up-regulatory nNOS expression on the hippocampus during brain development, and nNOS appeared to contribute to the persistent changes in seizure susceptibility, and epileptogenesis.
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spelling pubmed-28772202010-06-01 Increased Seizure Susceptibility and Up-regulation of nNOS Expression in Hippocampus Following Recurrent Early-life Seizures in Rats Kim, Doo-Kwun J Korean Med Sci Original Article This study aimed to determine the long-term change of seizure susceptibility and the role of nNOS on brain development following recurrent early-life seizures in rats. Video-EEG recordings were conducted between postnatal days 50 and 60. Alterations in seizure susceptibility were assayed on day 22 or 50 using the flurothyl method. Changes in nNOS expression were determined by quantitative immunoblotting on day 50. On average, rats had 8.4±2.7 seizures during 10 daily 1 hr behavioral monitoring sessions. As adults (days 50-60), all rats displayed interictal spikes in the hippocampus and/or overlying cortex. Brief electrographic seizures were recorded in only one of five animals. Rats appeared to progress from a period of marked seizure susceptibility (day 22) to one of lessened seizure susceptibility (day 50). Up-regulation of nNOS expression following early-life recurrent seizures was observed on day 50. In conclusion, these data suggested that recurrent early-life seizures had the long-term effects on seizure susceptibility late in life and up-regulatory nNOS expression on the hippocampus during brain development, and nNOS appeared to contribute to the persistent changes in seizure susceptibility, and epileptogenesis. The Korean Academy of Medical Sciences 2010-06 2010-05-25 /pmc/articles/PMC2877220/ /pubmed/20514313 http://dx.doi.org/10.3346/jkms.2010.25.6.905 Text en © 2010 The Korean Academy of Medical Sciences. http://creativecommons.org/licenses/by-nc/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Kim, Doo-Kwun
Increased Seizure Susceptibility and Up-regulation of nNOS Expression in Hippocampus Following Recurrent Early-life Seizures in Rats
title Increased Seizure Susceptibility and Up-regulation of nNOS Expression in Hippocampus Following Recurrent Early-life Seizures in Rats
title_full Increased Seizure Susceptibility and Up-regulation of nNOS Expression in Hippocampus Following Recurrent Early-life Seizures in Rats
title_fullStr Increased Seizure Susceptibility and Up-regulation of nNOS Expression in Hippocampus Following Recurrent Early-life Seizures in Rats
title_full_unstemmed Increased Seizure Susceptibility and Up-regulation of nNOS Expression in Hippocampus Following Recurrent Early-life Seizures in Rats
title_short Increased Seizure Susceptibility and Up-regulation of nNOS Expression in Hippocampus Following Recurrent Early-life Seizures in Rats
title_sort increased seizure susceptibility and up-regulation of nnos expression in hippocampus following recurrent early-life seizures in rats
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2877220/
https://www.ncbi.nlm.nih.gov/pubmed/20514313
http://dx.doi.org/10.3346/jkms.2010.25.6.905
work_keys_str_mv AT kimdookwun increasedseizuresusceptibilityandupregulationofnnosexpressioninhippocampusfollowingrecurrentearlylifeseizuresinrats