Mechanisms underlying glia-mediated ischemic tolerance
Project/Area Number |
25670622
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Multi-year Fund |
Research Field |
Neurosurgery
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Research Institution | University of Yamanashi |
Principal Investigator |
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Co-Investigator(Renkei-kenkyūsha) |
KINOUCHI Hiroyuki 山梨大学, 総合研究部, 教授 (30241623)
SHINOZAKI Youichi 山梨大学, 総合研究部, 講師 (10443772)
SHIGETOMI Eiji 山梨大学, 総合研究部, 助教 (00631061)
SHIBATA Keisuke 山梨大学, 総合研究部, 助教 (50580411)
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Project Period (FY) |
2013-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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Keywords | グリア細胞 / アストロサイト / 脳卒中 / 虚血耐性 / グリア伝達 / グリア / P2受容体 / 虚血 / P2X7受容体 |
Outline of Final Research Achievements |
Using a preceding sub-lethal ischemic insult, preconditioning (PC), is an attractive strategy for protecting neurons by inducing ischemic tolerance in the brain. Although the underlying molecular mechanisms have been studied extensively, almost all experiments have been performed on neurons. Here, using a middle cerebral artery occlusion model in mice, we show that astrocytes have an essential role in the induction of ischemic tolerance. PC caused activation of astrocytes, which was essential for the induction of ischemic tolerance. As for the mechanisms, we found that P2X7 receptors were dramatically upregulated in activated astrocytes, which was essential for the ischemic tolerance. Unlike previous reports focusing on neuron-based mechanisms, our results show that astrocytes play indispensable roles in inducing ischemic tolerance.
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Report
(3 results)
Research Products
(30 results)
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[Journal Article] TRPV4 regulates the integrity of the blood-cerebrospinal fluid barrier and modulates transepithelial protein transport2015
Author(s)
Narita, K., Sasamoto, S., Koizumi, S. Okazaki, S., Nakamura, H., Inoue, T. and Takeda, S
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Journal Title
Related Report
Peer Reviewed
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[Journal Article] Astrocyte-Mediated Ischemic Tolerance2015
Author(s)
Yuri Hirayama, Yuri Ikeda-Matsuo, Shoji Notomi, Hiroshi Enaida, Hiroyuki Kinouchi, Schuichi Koizumi
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Journal Title
Journal of Neuroscience
Volume: 35(9)
Issue: 9
Pages: 3794-3805
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Expression of Astrocyte-Related Receptors in Cortical Dysplasia With Intractable Epilepsy.2014
Author(s)
Sayuri Sukigara, Hongmei Dai, Shin Nabatame, Taisuke Otsuki, Sae Hanai, Ryoko Honda, Takashi Saito, Eiji Nakagawa, Takanobu Kaido, Noriko Sato, Yuu Kaneko, Akiko Takahashi, Kenji Sugai, Yuko Saito, Masayuki Sasaki, Yu-ichi Goto, Schuichi Koizumi,Masayuki Itoh
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Journal Title
J Neuropathol Exp Neurol
Volume: 73(8)
Issue: 8
Pages: 798-806
DOI
Related Report
Peer Reviewed
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[Presentation] 鍛えられるグリア細胞2014
Author(s)
小泉修一、平山友里
Organizer
第16回応用薬理シンポジウム
Place of Presentation
松島大観荘(宮城県宮城郡)
Year and Date
2014-12-05
Related Report
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[Presentation] グリア細胞と脳虚血耐性2014
Author(s)
小泉修一
Organizer
第2回パーキンソン病と神経科学研究会
Place of Presentation
ANAクラウンプラザホテル(京都府京都市)
Year and Date
2014-06-20
Related Report
Invited
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