Elucidation of the molecular mechanism of acute stress by visualization of dendritic spines in the hippocampus.
Project/Area Number |
23700369
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Neuroscience in general
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Research Institution | The University of Tokyo |
Principal Investigator |
HOJO Yasushi 東京大学, 総合文化研究科, 特任研究員 (20536875)
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Project Period (FY) |
2011 – 2012
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Project Status |
Completed (Fiscal Year 2012)
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Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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Keywords | 海馬 / 記憶学習 / 急性ストレス / シナプス / スパイン / ストレスホルモン / コルチコステロン / リン酸化カスケード / ストレスステロイド |
Research Abstract |
(1) We revealed that the molecular mechanism of spinogenesis induced by acute stress is“CORT→GR→Erk MAPK, PKA, PKC, PI3K→actin polymerization or rearrangement →spinogenesis and enlargement of spine head diameter”, which is completely different fromchronic stress effect with gene transcription.(2) We determined the concentration of hippocampus-synthesized CORT as 7 nM by using adrenalectomized rats and liquid chromatography- tandem mass spectrometry. Surprisingly, low dose CORT (~10 nM) induced spinogenesis, suggesting that low dose CORT may have a neurotrophic effect whereas high dose CORT (~1 μM) under stressful condition has deleterious effects.
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Report
(3 results)
Research Products
(29 results)
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[Journal Article] Hippocampal synthesis of sex steroids and corticosteroids : essential for modulation of synaptic plasticity2011
Author(s)
Hojo Y, Higo S, Kawato S, Hatanaka Y, Ooishi Y, Murakami G, Ishii H, Komatsuzaki Y, Ogiue-Ikeda M, Mukai H, Kimoto T
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Journal Title
Front Neuroendocrine Science
Volume: 2
Pages: 43-43
DOI
Related Report
Peer Reviewed
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[Journal Article] Endogenous Synthesis of Corticosteroids in the Hippocampus2011
Author(s)
Higo S, Hojo Y, Ishii H, Komatsuzaki Y, Ooishi Y, Murakami G, Mukai H, Yamazaki T, Nakahara D, Anna B, Kimoto T, Kawato S
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Journal Title
PLoS ONE
Volume: 6(7)
Issue: 7
Pages: 21631-21631
DOI
NAID
Related Report
Peer Reviewed
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[Presentation] 新規なスパイン解析プログラム2012
Author(s)
向井秀夫,畑中悠佑,三橋賢司,村上元,北條泰嗣,川戸佳
Organizer
第50回日本生物物理学会年会
Place of Presentation
名古屋大学東山キャンパス(愛知県、名古屋市)
Year and Date
2012-09-24
Related Report
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