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ミクログリアの活性酸素産生と亜鉛シグナル調節因子としてのプロトンチャネル

Publicly Offered Research

Project AreaBrain Environment
Project/Area Number 24111529
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionOsaka University

Principal Investigator

岡村 康司  大阪大学, 医学(系)研究科(研究院), 教授 (80201987)

Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
Fiscal Year 2013: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2012: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Keywords活性酵素 / ミクログリア / 亜鉛シグナル / pH / ホメオスタシス
Research Abstract

電位依存性プロトンチャネルVSOP/Hv1の細胞内動態を明らかにすることと、in vivo でのマウスでの解析を並行して行ってきた。
(1) 細胞膜近傍へVSOP/Hv1が移行することを、ATP刺激だけでなくUDPの刺激でも確認し、P2Y受容体が関与すると考えられた。また、アクチン線維の分布と共局在したことから、細胞骨格系の制御に関わる可能性が示唆された。
(2) NADPHオキシダーゼの抗体との二重染色を行い、VSOP/Hv1はNADPHオキシダーゼとは異なる膜小胞に分布することが示唆された。また、活性酸素産生レベルをノックアウトマウスと正常のマウスのミクログリアで比較した結果、ノックアウトマウスで産生が亢進していることから、NADPHオキシダーゼとVSOP/Hv1の関係は、好中球での機構とは異なると考えられた。
(3) Iba1-GFPマウスとVSOP/Hv1ノックアウトマウスの掛け合わせを進めた。
(4) VSOP/Hv1ノックアウトマウスが肥満を呈することを見いだし、摂食量の増加が体重増加に先行して見られることから、ミクログリア機能の変化によって食欲の亢進が起こっている可能性が考えられた。

Current Status of Research Progress
Reason

25年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

25年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (52 results)

All 2014 2013 2012 Other

All Journal Article (11 results) (of which Peer Reviewed: 10 results,  Open Access: 7 results) Presentation (35 results) (of which Invited: 10 results) Book (5 results) Remarks (1 results)

  • [Journal Article] Phosphatase activity of the voltage-sensing phosphatase, VSP, shows graded dependence on the extent of activation of the voltage sensor2014

    • Author(s)
      Sakata S & Okamura Y
    • Journal Title

      J. Physiol.

      Volume: 592(Pt 5) Issue: 5 Pages: 899-914

    • DOI

      10.1113/jphysiol.2013.263640

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] X-ray crystal structure of voltage-gated proton channel2014

    • Author(s)
      Takeshita K, Sakata S, Yamashita E, Fujiwara Y, Kawanabe A, Kurokawa T, Okochi Y, Matsuda M, Narita H, Okamura Y & Nakagawa A
    • Journal Title

      Nat. Strucl. & Mol. Biol.

      Volume: (4) Issue: 4 Pages: 352-7

    • DOI

      10.1038/nsmb.2783

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Potential role of voltage-sensing phosphatases in regulation of cell structure through the production of PI(3,4)P<sub>2</sub>2013

    • Author(s)
      Yamaguchi S, Kurokawa T, Taira I, Aoki N, Sakata S, Okamura Y & Homma KJ
    • Journal Title

      J. Cell Physiol.

      Volume: 229 Issue: 4 Pages: 422

    • DOI

      10.1002/jcp.24463

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Optically detected structural change in the N-terminal region of the voltage-sensor domain.2013

    • Author(s)
      Tsutsui H, Jinno Y, Tomita A, Okamura.Y
    • Journal Title

      Biophys. J.

      Volume: 105(1) Issue: 1 Pages: 108-115

    • DOI

      10.1016/j.bpj.2013.05.051

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural characteristics of the redox-sensing coiled coil in the voltage-gated H+ channel.2013

    • Author(s)
      Fujiwara Y, Takeshita K, Nakagawa A, Okamura Y
    • Journal Title

      J Biol Chem.

      Volume: 288(25) Issue: 25 Pages: 17968-75

    • DOI

      10.1074/jbc.m113.459024

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Improved detection of electrical activity with a voltage probe based on a voltage-sensing phosphatase2013

    • Author(s)
      Tsutsui H, Jinno Y, Tomita A, Niino Y, Yamada Y, Mikoshiba K, Miyawaki A & Okamura Y
    • Journal Title

      J. Physiol. , Epub 2013 Jul 8

      Volume: 591(Pt 18) Issue: 18 Pages: 4427-37

    • DOI

      10.1113/jphysiol.2013.257048

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mapping of sites facing aqueous environment of voltage-gated proton channel at resting state: A study with PEGylation protection2013

    • Author(s)
      Kurokawa T & Okamura Y
    • Journal Title

      Biochem. Biophys. Acta

      Volume: 1838(1 Pt B) Issue: 1 Pages: 382-7

    • DOI

      10.1016/j.bbamem.2013.10.001

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Autoimmune disorder phenotypes in Hvcn1-deficient mice.2013

    • Author(s)
      Sasaki M, Tojo A, Okochi Y, Miyawaki N, Kamimura D, Yamaguchi A, Murakami M, Okamura Y
    • Journal Title

      Biochem.

      Volume: 450 Pages: 295-301

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The cytoplasmic coiled-coil mediates cooperative gating temperature sensitivity in the voltage-gated H+ channel Hv1.2013

    • Author(s)
      Fujiwara Y, Nakagawa A, Okamura Y
    • Journal Title

      SPring-8 Research Frontiers.

      Volume: 0 Pages: 0-0

    • Related Report
      2012 Annual Research Report
  • [Journal Article] The cytoplasmic coiled-coil mediates cooperative gating temperature sensitivity in the voltage-gated H+ channel Hv12012

    • Author(s)
      Fujiwara Y, Kurokawa T, Takeshita K, Kobayashi M, Okochi Y, Nakagawa A & Okamura Y
    • Journal Title

      Nat. Communi.

      Volume: 3 Issue: 1 Pages: 816-816

    • DOI

      10.1038/ncomms1823

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Gating of the designed trimeric/tetrameric voltage-gated H+ channel.2012

    • Author(s)
      Fujiwara Y, Kurokawa T, Takeshita K, Nakagawa A, Larsson HP, Okamura Y
    • Journal Title

      J. Physiol.

      Volume: 591 Pages: 627-40

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Presentation] 電位依存性H+チャネルの膜電位感知機能2014

    • Author(s)
      藤原祐一郎、岡村康司
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 活性化速度の異なるウニおよびマウスVSOP1/Hv1の比較による電位依存的ゲート機構2014

    • Author(s)
      坂田宗平、宮脇奈那、黒川竜紀、オズカーヌルダン、岡村康司
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 電位依存性H+チャネルのゲーティングに対するS4領域の構造基盤2014

    • Author(s)
      奥田裕子、岡村康司 、藤原祐一郎
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 電位依存性プロトンチャネルにおける閉状態のトポロジー解析2014

    • Author(s)
      黒川竜紀、岡村康司
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 電位依存性プロトンチャネルへの不飽和脂肪酸による活性増強効果の定量的解析2014

    • Author(s)
      川鍋陽、岡村康司
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 電位依存性プロトンチャネル欠損マウスはメタボリックシンドロームの表現を呈する2014

    • Author(s)
      河合喬文、大河内善史、井村誉史雄、古川祐子、宮脇那奈、崎村建司、小泉修一、岡村康司
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 光学的に検出された電位センサーN末領域の構造変化2014

    • Author(s)
      筒井秀和、神野有香、富田亜希子、岡村康司
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 発現系を用いたCi-CatSperチャネルの機能解析2014

    • Author(s)
      有馬大貴、岡村康司 、筒井秀和
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
  • [Presentation] PI(4,5)P2-DAGシグナルによって制御されるPCL共役方TRPC電流のモデルシュミレーション2014

    • Author(s)
      森誠之、斎恭平、今井裕子、岡村康司 、井上隆司、長谷英治、森泰生
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 電位依存性プロトンチャネルVSOP/H1の動作原理2014

    • Author(s)
      岡村康司 、藤原祐一郎、川鍋陽、坂田宗平、黒川竜紀
    • Organizer
      第91回日本生理学会大会
    • Place of Presentation
      鹿児島県鹿児島市
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Voltage-sensor domain proteins: phosphonositide signal, proton permeation and molecular tools.2014

    • Author(s)
      Yasushi Okamura
    • Organizer
      Biophsical Society 58th Annual Meeting
    • Place of Presentation
      San Francisco, CA, USA
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Inhibitation by reduction of PIP2 accelerates inactivation of receptor-operated TRPC6/7 currents.2014

    • Author(s)
      Mori Masayuki, Kyohei Itsuki, Yuko Imai, Hideharu Hase, Yasushi Okamura, Ryuji Inoue
    • Organizer
      Biophsical Society 58th Annual Meeting
    • Place of Presentation
      San Francisco, CA, USA
    • Related Report
      2013 Annual Research Report
  • [Presentation] The activation kinetics of the voltage-gated proton channel is drastically accelerated by unsaturated fatty acids.2014

    • Author(s)
      Akira Kawanabe, Yasushi Okamura
    • Organizer
      Biophsical Society 58th Annual Meeting
    • Place of Presentation
      San Francisco, CA, USA
    • Related Report
      2013 Annual Research Report
  • [Presentation] 電位依存性ホスファターゼの動作原理と分子ツールへの応用2013

    • Author(s)
      岡村康司 、筒井秀和、坂田宗平
    • Organizer
      第86回日本生化学会大会プログラム
    • Place of Presentation
      神奈川県 横浜市
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] 不飽和脂肪酸による電位依存性プロトンチャネルへの活性増強効果2013

    • Author(s)
      川鍋陽、岡村康司
    • Organizer
      第51回日本生物物理学会年会
    • Place of Presentation
      京都府京都市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 電位依存性ホスファターゼ(VSP)の酵素活性は、電位センサーの動いた大きさに従い段階的に発揮される2013

    • Author(s)
      坂田宗平、岡村康司
    • Organizer
      平成25年度生理学研究所研究会
    • Place of Presentation
      愛知県 岡崎市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 電位センサー蛋白機能の多様性:イオン透過からホスファターゼまで2013

    • Author(s)
      岡村康司 、藤原祐一郎、坂田宗平、河合 喬文、筒井秀和、大河内善史
    • Organizer
      Neuro2013(第36回神経科学学大会)
    • Place of Presentation
      京都府京都市
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Voltage-sensing phosphatase - its structure and portability.2013

    • Author(s)
      Yasushi Okamura, Souhei Sakata, Hidekazu Tsutsui
    • Organizer
      The 1st Awaji International Workshop on Electron Spin Science & Technology: Biological and Materials Sciences Oriented Applications. (1st AWEST 2013)
    • Place of Presentation
      兵庫県淡路市
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Enzyme activity of voltage-sensing phosphatase (VSP) is graded dependent of the magnitude of movements of the voltage sensor?2013

    • Author(s)
      Souhei Sakata, Yasushi Okamura
    • Organizer
      The 4th International Ion Channel Conference.
    • Place of Presentation
      Shijiazhuang, China
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Regulatory roles of the dimeric structure in the voltage-gated H+ channel.2013

    • Author(s)
      Fujiwara Y, Kurokawa T, Takeshita K, Kobayashi M, Nakagawa A, Okamura Y
    • Organizer
      第90回日本生理学会大会
    • Place of Presentation
      東京、タワーホール船堀
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] How excited to talk with PI?: Lesson from voltage-sensing phosphatase.2013

    • Author(s)
      Okamura Y
    • Organizer
      第90回日本生理学会大会
    • Place of Presentation
      東京、タワーホール船堀
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Rapid evaluation of optical voltage reporters using field-induced transmembrane potential response.2013

    • Author(s)
      Tsutsui H, Okamura Y
    • Organizer
      第90回日本生理学会大会
    • Place of Presentation
      東京、タワーホール船堀
    • Related Report
      2012 Annual Research Report
  • [Presentation] Substrate specificity of the voltage-sensing phosphatase (VSP) changes with membrane potential.2013

    • Author(s)
      Kurokawa T, Takasuga S, Sakata S, Yamaguchi S, Shigeo H, Homma K, Sasaki T, Okamura Y
    • Organizer
      第90回日本生理学会大会
    • Place of Presentation
      東京、タワーホール船堀
    • Related Report
      2012 Annual Research Report
  • [Presentation] Graded tuning of phosphatase activity of VSP coupled with the intermediate state of the voltage sensor.2013

    • Author(s)
      Sakata S, Okamura Y
    • Organizer
      Biophysical Society 57th Annual Meeting
    • Place of Presentation
      Philadelphia, PA, USA
    • Related Report
      2012 Annual Research Report
  • [Presentation] Calcium transients in muscle fibers expressing voltage-sensitive phosphoinositide phosphatases.2013

    • Author(s)
      Loustau T, Legrand C, Berthier C, Okamura Y, Jacquemond V
    • Organizer
      Biophysical Society 57th Annual Meeting
    • Place of Presentation
      Philadelphia, PA, USA
    • Related Report
      2012 Annual Research Report
  • [Presentation] PIP2 dynamics underlying muscarinic or vasopressin receptor-activated TRPC3 C6 and C7 currents.2013

    • Author(s)
      Itsuki K, Imai Y, Okamura Y, Inoue R, Mori, MX
    • Organizer
      Biophysical Society 57th Annual Meeting
    • Place of Presentation
      Philadelphia, PA, USA
    • Related Report
      2012 Annual Research Report
  • [Presentation] Structural bases of the gating regulation in the voltage-gated H+ channel.2013

    • Author(s)
      Fujiwara Y, Kurokawa T, Okamura Y
    • Organizer
      Nagoya Symposium -Frontiers in Structural Physiology
    • Place of Presentation
      愛知県 名古屋市
    • Related Report
      2012 Annual Research Report
  • [Presentation] Physiological genomics of amphibian VSP: a potential molecular mechanism of electrical block of fertilization in vertebrates.2013

    • Author(s)
      Mutua J, Jinno Y, Ueno S, Sakata S, Okochi Y, Tsutsui H, Iwao Y, Jaffe L, Okamura Y
    • Organizer
      第90回日本生理学会大会
    • Place of Presentation
      東京、タワーホール船堀
    • Related Report
      2012 Annual Research Report
  • [Presentation] Phosphatase activity of VSP is graded in a reflection of the sequential motion of the voltage sensor.2013

    • Author(s)
      Sakata S, Okamura Y
    • Organizer
      第90回日本生理学会大会
    • Place of Presentation
      東京、タワーホール船堀
    • Related Report
      2012 Annual Research Report
  • [Presentation] The optimization of the electrophysiological characterization of the voltage-gated proton channel on the artificial membrane.2013

    • Author(s)
      Kawanabe A, Okamura Y
    • Organizer
      第90回日本生理学会大会
    • Place of Presentation
      東京、タワーホール船堀
    • Related Report
      2012 Annual Research Report
  • [Presentation] Subcellular localization of voltage-gated proton channels in primary cultured microglia.2013

    • Author(s)
      Kawai T, Imura Y, Koizumi S, Okochi Y, Sakimura K, Okamura Y
    • Organizer
      第90回日本生理学会大会
    • Place of Presentation
      東京、タワーホール船堀
    • Related Report
      2012 Annual Research Report
  • [Presentation] Autoimmune disorder phenotypes in Hvcn1-deficient mice.2013

    • Author(s)
      Sasaki M, Tojo A, Okochi Y, Miyawaki N, Kamimura D, Yamaguchi A, Murakami M, Okamura Y
    • Organizer
      第90回日本生理学会大会
    • Place of Presentation
      東京、タワーホール船堀
    • Related Report
      2012 Annual Research Report
  • [Presentation] 3' Phosphatase activity toward phosphatidylinositol 3,4-bisphosphate [PI(3,4)P2] by voltage-sensing phosphatase (VSP).2012

    • Author(s)
      Kurokawa T, Takasuga S, Sakata S, Yamaguchi S, Horie S, Homma KJ, Sasaki T, Okamura Y
    • Organizer
      第85回日本生化学会大会
    • Place of Presentation
      福岡県 福岡市
    • Year and Date
      2012-12-14
    • Related Report
      2012 Annual Research Report
  • [Presentation] Secret lives of voltage-sensing phosphatases.2012

    • Author(s)
      Okamura Y
    • Organizer
      Gordon Research Conference "Bioelectrochemistry"
    • Place of Presentation
      Lucca, Italy
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Molecular properties of voltage-sensing phosphatases and applications to molecular tools.2012

    • Author(s)
      Okamura Y, Tsutsui H
    • Organizer
      The 1st NTU-Osaka U Joint Symposium on Biomedical Science
    • Place of Presentation
      台北 台湾
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Book] 生物学辞典 第五版2013

    • Author(s)
      巌佐 庸、倉谷 滋、斎藤 成也、塚谷 裕一
    • Total Pages
      2192
    • Publisher
      岩波書店
    • Related Report
      2013 Annual Research Report
  • [Book] 生物学辞典 第五版2013

    • Author(s)
      岡村康司
    • Publisher
      岩波書店
    • Related Report
      2012 Annual Research Report
  • [Book] Brain Science Dictionary (on line)2013

    • Author(s)
      坂田宗平、岡村康司
    • Publisher
      脳科学辞典「ナトリウムチャネル」
    • Related Report
      2012 Annual Research Report
  • [Book] Brain Science Dictionary (on line)2013

    • Author(s)
      藤原祐一郎、岡村康司
    • Publisher
      脳科学辞典「膜電位センサー」
    • Related Report
      2012 Annual Research Report
  • [Book] Comprehensive Biophysics2013

    • Author(s)
      Okamura Y
    • Publisher
      Academic Press
    • Related Report
      2012 Annual Research Report
  • [Remarks] 大阪大学大学院医学系研究科統合生理学教室

    • URL

      http://www.med.osaka-u.ac.jp/pub/phys2/okamura/

    • Related Report
      2013 Annual Research Report

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Published: 2013-05-15   Modified: 2019-07-29  

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