Pathomechanisms underlying human temporal lobe epilepsy
Project/Area Number |
25250008
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Nerve anatomy/Neuropathology
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Research Institution | Niigata University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
藤井 幸彦 新潟大学, 脳研究所, 教授 (40283014)
北浦 弘樹 新潟大学, 脳研究所, 助教 (80401769)
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Project Period (FY) |
2013-04-01 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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Budget Amount *help |
¥47,710,000 (Direct Cost: ¥36,700,000、Indirect Cost: ¥11,010,000)
Fiscal Year 2016: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2013: ¥31,590,000 (Direct Cost: ¥24,300,000、Indirect Cost: ¥7,290,000)
|
Keywords | てんかん / 脳神経疾患 / 海馬硬化症 / カリウムチャネル / 海馬 / 神経病理学 / 神経回路 / 細胞病理学 |
Outline of Final Research Achievements |
Mesial temporal lobe epilepsy (MTLE) is the most frequent focal epileptic syndrome in adults, and the majority of seizures originate primarily from the hippocampus. The resected hippocampus shows several degrees of neuronal loss (hippocampal sclerosis: HS), accordingly there would arise a paradox between clinical and pathological findings; how these atrophic tissues cause epilepsy? Here we investigated epileptiform activities using hippocampal specimens taken from MTLE patients ex vivo. Flavoprotein fluorescence imaging and local field potential recordings (LFPs) revealed that epileptiform activities were arise from subiculum of MTLE groups. Moreover, loss of inwardly rectifying K+ channel 4.1 (Kir 4.1) was evident in the astrocytes of the subiculum of HS. These results suggest that epileptogenic mechanisms would correlate to the distinct pathologies, and Kir 4.1 may play a pivotal role in epileptogensis of the HS.
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Report
(5 results)
Research Products
(57 results)
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[Journal Article] Comprehensive genetic characterizeation of rosette-forming glioneuronal tumors: independent component analysis by tissue microdissection.2017
Author(s)
Kitamura Y, Komori T, Shibuya M, Ohara K, Saito Y, Hayashi S, Sasaki A, Nakagawa E, Tomio R, Kakita A, Nakatsukasa M, Yoshida K, Sasaki H.
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Journal Title
Brain Pathology
Volume: 印刷中
Issue: 1
Pages: 87-93
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Ca2+-permiable AMPA receptors associated with epileptogenesis of hypothalamic hamartoma.2017
Author(s)
Kitaura H, Sonoda M, Teramoto S, Shirozu H, Shimizu H, Kimura M, Masuda H, Ito Y, Takahashi H, Kwak S, Kameyama S, Kakita A.
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Journal Title
Epilepsia
Volume: 58
Issue: 4
Pages: 59-63
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Biallelic TBCD mutations cause early-onset neurodegenerative encephalopathy2017
Author(s)
Miyake N, Fukai R, Ohba C, ... Shiina M, Ogata K, Okuno-Yuguchi J, Fueki N, Ogiso Y, Suzumura H, Watabe Y, Imataka G, Leong HY, Fattal-Valevski A, Kramer U, Miyatake S, Kato M, Okamoto N, Sato Y, Mitsuhashi S, Nishino I, Kaneko N, Nishiyama A, Tamura T, Mizuguchi T, Nakashima M, Tanaka F, Saitsu H, Matsumoto N
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Journal Title
American Journal of Human Genetics
Volume: 99
Issue: 4
Pages: 950-961
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Characteristic p57/Kip2 immunoreactivity of balloon cells in focal cortical dysplasia.2015
Author(s)
Kimura T, Kitaura H, Masuda H, Kameyama S, Saito Y, Otsuki T, Nakazawa A, Morota N, Yamamoto T, Iida K, Takahashi H, Kakita A.
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Journal Title
Neuropathology
Volume: 00
Issue: 5
Pages: 000-000
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Somatic Mutations in the MTOR gene cause focal cortical dysplasia type IIb2015
Author(s)
Nakashima M, Saitsu H, Takei N, Tohyama J, Kato M, Kitaura H, Shiina M, Shirozu H, Masuda H, Watanabe K, Ohba C, Tsurusaki Y, Miyake N, Zheng Y, Sato T, Takebayashi H, Ogata K, Kameyama S, Kakita A, Matsumoto N
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Journal Title
Ann. Neurol.
Volume: 78
Issue: 3
Pages: 375-386
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Two siblings with cortical dysplasias: focal cortical dysplasia and hemimegalencephaly: clinicoencephalographic features.2015
Author(s)
Fukasawa T, Kubota T, Negoro T, Maruyama S, Honda R, Saito Y, Ito M, Kakita A, Sugai K, Otsuki T, Natsume J, Watanabe K
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Journal Title
Pediatric Int
Volume: 57
Issue: 3
Pages: 472-475
DOI
Related Report
Peer Reviewed
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[Journal Article] Two siblings with cortical dysplasias: focal cortical dysplasia and hemimegalencephaly: clinicoencephalographic features.2015
Author(s)
Fukasawa T, Kubota T, Negoro T, Maruyama S, Honda R, Saito Y, Ito M, Kakita A, Sugai K, Otsuki T, Natsume J, Watanabe K.
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Journal Title
Related Report
Peer Reviewed
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[Journal Article] Electrocorticographic–Histopathologic Correlations Implying Epileptogenicity of Dysembryoplastic Neuroepithelial Tumor2013
Author(s)
Kagawa K, Iida K, Kakita A, Katagiri M, Nishimoto T, Hashizume A, Kiura Y, Hanaya R, Sugiyama K, Arihiro K, Arita K, Kurisu K
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Journal Title
Neurologia medico-chirurgica
Volume: 53
Issue: 10
Pages: 676-687
DOI
NAID
ISSN
0470-8105, 1349-8029
Related Report
Peer Reviewed
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[Presentation] 腫瘍性病変による難治てんかんに対する手術戦略.2017
Author(s)
増田 浩,白水洋史,伊藤陽祐,中山遥子,東島威史,福多真史, 柿田明美, 藤井幸彦.
Organizer
第40回日本てんかん外科学会
Place of Presentation
ナレッジキャピタルコングレコンベンションセンター(大阪府大阪市)
Year and Date
2017-01-26
Related Report
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[Presentation] Different mechanism of epileptogensis in subiculum and dentate gyrus in mesial temporal lobe epilepsy: an in vitro optical imaging study of resected human hippocampus.2014
Author(s)
Kitaura H, Shirozu H, Shimizu H, Sonoda M, Murakami H, Masuda H, Takahashi H, Kameyama S, Kakita A.
Organizer
Society for Neuroscience
Place of Presentation
Walter E. Washington Convention Center, Washington DC, USA
Year and Date
2014-11-15 – 2014-11-19
Related Report
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[Presentation] てんかん焦点の病理2014
Author(s)
柿田明美
Organizer
第48回日本てんかん学会.
Place of Presentation
東京
Year and Date
2014-10-02 – 2014-10-03
Related Report
Invited
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[Presentation] てんかんの病理
Author(s)
柿田明美
Organizer
西新潟中央病院てんかんセンター 夏季セミナー
Place of Presentation
新潟
Related Report
Invited
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