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2015 Fiscal Year Annual Research Report

亜鉛シグナルによる記憶障害から視たアルツハイマー病克服に向けた戦略的新展開

Research Project

Project/Area Number 25293032
Research InstitutionUniversity of Shizuoka

Principal Investigator

武田 厚司  静岡県立大学, 薬学部, 教授 (90145714)

Project Period (FY) 2013-04-01 – 2016-03-31
Keywords亜鉛 / アルツハイマー病 / アミロイドβ / 認知機能 / 海馬
Outline of Annual Research Achievements

アルツハイマー病において嗅内野は最も早く障害される部位であり, 軽度認知機能障害(MCI, mild cognitive impairment)においても萎縮が観察される部位である。嗅内野からは貫通線維を介して海馬歯状回に記憶情報が入力されるが, 貫通線維-歯状回顆粒細胞シナプスは, アルツハイマー病発症前におけるアミロイドβ(Aβ)の標的部位であると考えられる。しかし, なぜこのシナプスがAβ毒性に脆弱であるのか, その原因は明らかにされていない。正常なラット脳の歯状回にヒトAβ1-42を投与すると, 細胞外Zn2+と結合して顆粒細胞内に取り込まれ, 内側貫通線維-歯状回顆粒細胞シナプスでの長期増強(LTP)が障害され, 物体認識が一過性に障害されることをこれまでに明らかにした。また, これらの障害は細胞外Zn2+キレーターあるいは細胞内Zn2+キレーターで回避できた。正常な脳細胞外Aβ1-42濃度は脳脊髄液濃度などから約200-1000 pMレベルと推定されている。マイクロダイアリシスプローブ付き記録電極を用いたLTP実験から, 5 nMのAβ1-42で記録部位を灌流すると, 脳細胞外Zn2+の存在により速やかにZn-Aβ1-42オリゴマーが形成され, 内側貫通線維-歯状回顆粒細胞シナプスでのLTPが障害されることが明らかとなった。一方, 5 nMのAβ1-40を同様に灌流してもLTPは障害されず, Zn-Aβ1-42オリゴマーが顆粒細胞に取り込まれ, 物体認識が障害されることが示された。

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Causes of Carryover

27年度が最終年度であるため、記入しない。

Expenditure Plan for Carryover Budget

27年度が最終年度であるため、記入しない。

  • Research Products

    (16 results)

All 2016 2015 Other

All Int'l Joint Research (1 results) Journal Article (11 results) (of which Peer Reviewed: 11 results) Presentation (4 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results)

  • [Int'l Joint Research] The University of Melbourne(Australia)

    • Country Name
      Australia
    • Counterpart Institution
      The University of Melbourne
  • [Journal Article] Significance of the degree of synaptic Zn2+ signaling in cognition2016

    • Author(s)
      Atsushi Takeda and Haruna Tamano
    • Journal Title

      BioMetals

      Volume: 29 Pages: 177-185

    • DOI

      10.1007/s10534-015-9907-z

    • Peer Reviewed
  • [Journal Article] Significance of synaptic Zn2+ signaling in zincergic and non-zincergic synapses in the hippocampus in cognition2016

    • Author(s)
      Hanuna Tamano, Yuta Koike, Hiroyuki Nakada, Yukina Shakushi, and Atsushi Takeda
    • Journal Title

      J. Trace Elem. Med. Biol.

      Volume: in press Pages: in press

    • DOI

      10.1016/j.jtemb.2016.03.003

    • Peer Reviewed
  • [Journal Article] Significance of low nanomolar concentration of Zn2+ in artificial cerebrospinal fluid2016

    • Author(s)
      Atsushi Takeda and Haruna Tamano
    • Journal Title

      Mol. Neurobiol.

      Volume: in press Pages: in press

    • DOI

      in press

    • Peer Reviewed
  • [Journal Article] Regulation of extracellular Zn2+ homeostasis in the hippocampus as a therapeutic target for Alzheimer’s disease.2015

    • Author(s)
      Atsushi Takeda and Haruna Tamano
    • Journal Title

      Expert Opin. Ther. Tar.

      Volume: 19 Pages: 1-8

    • DOI

      10.1517/14728222.2015.1029454

    • Peer Reviewed
  • [Journal Article] Is interaction of amyloid β-peptides with metals involved in cognitive activity?2015

    • Author(s)
      Haruna Tamano and Atsushi Takeda
    • Journal Title

      Metallomics

      Volume: 7 Pages: 1205-1212

    • DOI

      10.1039/c5mt00076a

    • Peer Reviewed
  • [Journal Article] Blockade of intracellular Zn2+ signaling in the dentate gyrus erases recognition memory via impairment of maintained LTP2015

    • Author(s)
      Haruna Tamano, Tatsuya Minamino, Hiroaki Fujii, Shunsuke Takada, Masatoshi Nakamura, Masaki Ando, and Atsushi Takeda
    • Journal Title

      Hippocampus

      Volume: 25 Pages: 952-962

    • DOI

      10.1002/hipo.22418

    • Peer Reviewed
  • [Journal Article] Excess influx of Zn2+ into dentate granule cells affects object recognition memory via attenuated LTP2015

    • Author(s)
      Miki Suzuki, Yuki Fujise, Yuka Tsuchiya, Haruna Tamano, Atsushi Takeda
    • Journal Title

      Neurochem. Int.

      Volume: 87 Pages: 60-65

    • DOI

      10.1016/j.neuint.2015.05.006

    • Peer Reviewed
  • [Journal Article] Influx of extracellular Zn2+ into the hippocampal CA1 neurons is required for cognitive performance via long-term potentiation2015

    • Author(s)
      Atsushi Takeda, Miki Suzuki, Munekazu Tempaku, Kazumi Ohashi, Haruna Tamano
    • Journal Title

      Neuroscience

      Volume: 304 Pages: 209-216

    • DOI

      10.1016/j.neuroscience.2015.07.042

    • Peer Reviewed
  • [Journal Article] Modification of hippocampal excitability in brain slices pretreated with low nanomolar concentration of Zn2+2015

    • Author(s)
      Atsushi Takeda, Yukina Shakushi, and Haruna Tamano
    • Journal Title

      J. Neurosci. Res.

      Volume: 93 Pages: 1641-1647

    • DOI

      10.1002/jnr.23629

    • Peer Reviewed
  • [Journal Article] Melanin production through novel processing of proopiomelanocortin in the extracellular compartment of the auricular skin of C57BL/6 mice after UV-irradiation2015

    • Author(s)
      Hiroyuki Yamamoto, Tomohiro Yamane, Kazuaki Iguchi, Kiyotaka Tanaka, Arunasiri Iddamalgoda, Keiko Unno, Minoru Hoshino, Atsushi Takeda
    • Journal Title

      Sci. Rep.

      Volume: 2 Pages: 14579

    • DOI

      10.1038/srep14579

    • Peer Reviewed
  • [Journal Article] Preventive effect of 3,5-dihydroxy-4-methoxybenzyl alcohol and zinc, Pacific oyster components, on glutamatergic neuron activity in the hippocampus2015

    • Author(s)
      Haruna Tamano, Yukina Shakushi, Mitsugu Watanabe, Kazumi Ohashi, Chihiro Uematsu, Tadamune Otsubo, Kiyoshi Ikeda, and Atsushi Takeda
    • Journal Title

      Biol. Bul.

      Volume: 229 Pages: 282-288

    • Peer Reviewed
  • [Presentation] アミロイドβ-亜鉛形成から視た軽度認知機能障害2016

    • Author(s)
      武田厚司
    • Organizer
      日本薬学会第136年会
    • Place of Presentation
      横浜
    • Year and Date
      2016-03-28
    • Invited
  • [Presentation] Bidirectional actions of hippocampal Zn2+ signaling in cognition and its decline2015

    • Author(s)
      Atsushi Takeda
    • Organizer
      International Society for Trace Element Research 2015
    • Place of Presentation
      Dubrovnik, Croatia
    • Year and Date
      2015-10-22
    • Int'l Joint Research / Invited
  • [Presentation] Bidirectional actions of hippocampal Zn2+ signaling in cognition: its involvement in amyloid-β-induced cognitive decline2015

    • Author(s)
      Atsushi Takeda
    • Organizer
      "Plenary Lecture", 2015 Spring Annual Convention of Pharmaceutical Society of Korea
    • Place of Presentation
      Osong, Korea
    • Year and Date
      2015-04-24
    • Int'l Joint Research / Invited
  • [Presentation] Bidirectional actions of hippocampal Zn2+ signaling in cognition: its involvement in amyloid-β-induced cognitive decline2015

    • Author(s)
      Atsushi Takeda
    • Organizer
      "Special seminar", Hallym University
    • Place of Presentation
      Chuncheon, Korea
    • Year and Date
      2015-04-22
    • Int'l Joint Research / Invited

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Published: 2017-01-06  

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