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ボツリヌスHAと腸管上皮細胞の相互作用の解明

Research Project

Project/Area Number 21390128
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Bacteriology (including Mycology)
Research InstitutionOsaka University

Principal Investigator

藤永 由佳子  Osaka University, 微生物病研究所, その他 (60252954)

Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2011: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2010: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2009: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Keywords微生物 / 細菌 / 毒素 / 上皮細胞バリア
Research Abstract

ボツリヌス神経毒素は、腸管上皮バリアを通過して血中に移行することによって、ボツリヌス食中毒を発症させる。巨大タンパク質分子である本毒素がこのバリアを通過する機構は不明な点が多い。最近申請者らは、毒素に結合しているHA (Hemagglutinin)が腸管上皮細胞バリアを突破する新規機能を持つことを発見した。その1つにtranscytosisを促進する機能がある。本年度は、HAによるtranscytosis経路(細胞側)の解析を中心に行った。
[HAが結合する腸管上皮アピカル側の分子の探索]
前年度までの解析を含めて、HAはin situマウス結紮腸管およびin vitro培養細胞(Caco-2)で、transcytosisを引き起こすことが、コンフォーカル顕微鏡を用いたイメージング解析で明らかになってきた。今年度は、腸管上皮アピカル側膜上に存在し、HAが結合することにより、transcytosisを引き起こす分子の探索を行った。その結果、pull down法により、HAと結合するいくつかの膜タンパク質が得られた。そこで、それらについて、HA側の結合ドメインの解析を進めている。また、それらのタンパク質のノックアウトマウスを用いたHAおよびHA含有毒素複合体の腸管吸収の解析を進めている。

Report

(2 results)
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (18 results)

All 2010 2009

All Journal Article (7 results) (of which Peer Reviewed: 5 results) Presentation (11 results)

  • [Journal Article] Botulinum HA disrupts the intercellular epithelial barrier by directly binding E-cadherin.2010

    • Author(s)
      Sugawara Y., Matsumura T, Takegahara, Y., Jin Y., Tsukasaki Y., Takeichi M., Fujinaga, Y
    • Journal Title

      J.Cell Biol.

      Volume: 189 Pages: 691-700

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interaction of botulinum toxin with the epithelial barrier.2010

    • Author(s)
      Fujinaga, Y.
    • Journal Title

      Journal of Biomedicine and Biotechnology

      Volume: 2010

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interaction of botulinum toxin with the epithelial barrier.2010

    • Author(s)
      Fujinaga Y.
    • Journal Title

      Journal of Biomedicine and Biotechnology 2010(Article ID 974943, 9 pages)

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Disruption of the epithelial barrier by botulinum hemagglutinin (HA) proteins-Differences in cell tropism and the mechanism of action between HA proteins of types A or B, and HA proteins of type C.2009

    • Author(s)
      Jin, Y., Takegahara, Y., et al.
    • Journal Title

      Microbiology 155

      Pages: 35-45

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A novel function of botulinum toxin-associated proteins : HA proteins disrupt intestinal epithelial barrier to increase toxin absorption.2009

    • Author(s)
      Fujinaga, Y., et al.
    • Journal Title

      Toxicon 54

      Pages: 583-586

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ボツリヌス毒素と腸管上皮細胞バリア破壊2009

    • Author(s)
      藤永由佳子
    • Journal Title

      化学療法の領域 25

      Pages: 745-754

    • Related Report
      2009 Annual Research Report
  • [Journal Article] 水際の攻防~ボツリヌス毒素vs腸管上皮細胞バリア2009

    • Author(s)
      藤永由佳子
    • Journal Title

      細胞の化学 遺伝 63

      Pages: 20-25

    • Related Report
      2009 Annual Research Report
  • [Presentation] Food-borne botulism and transepithelial transport of botulinum toxin2010

    • Author(s)
      Yukako Fujinaga, Yo Sugawara, Takuhiro Matsumura, Yuki Takegahara
    • Organizer
      第62回 日本細胞生物学会(シンポジウム)シンポジウム3 病態の理解に向けた細胞内ロジスティクス研究
    • Place of Presentation
      大阪(招待講演)
    • Related Report
      2010 Annual Research Report
  • [Presentation] ボツリヌス毒素複合体成分とE-cadherinの結合による上皮細胞間バリア破壊と毒素の腸管吸収2010

    • Author(s)
      藤永由佳子、菅原庸、松村拓大
    • Organizer
      第33回日本分子生物学会年回・第83回日本生化学会大会 合同大会
    • Place of Presentation
      神戸
    • Related Report
      2010 Annual Research Report
  • [Presentation] Botulinum hemagglutinin targets E-cadherin to disrupt the intercellular epithelial barrier.2010

    • Author(s)
      Sugawara Y, Matsumura T, Takegahara T, Jin Y, Fujinaga Y.
    • Organizer
      The Awaji International Forum on Infectionand Immunity
    • Place of Presentation
      Awaji Island, Japan
    • Related Report
      2010 Annual Research Report
  • [Presentation] Botulinum HA targets E-cadherin to disrupt the intercellular epithelial barrier.2010

    • Author(s)
      Sugawara Y, Matsumura T, Fujinaga, Y.
    • Organizer
      47^<th> IBRCC 2010, Intergency botulinum research coordinating committee meeting
    • Place of Presentation
      Atlanta, USA
    • Related Report
      2010 Annual Research Report
  • [Presentation] Development of human monoclonal antibodies against type A botulinum neurotoxin.2010

    • Author(s)
      Matsumura T, Du A, Sugawara Y, Kohda T, Takahashi M, Kozaki S, Ikuta K, Fujinaga Y.
    • Organizer
      47^<th> IBRCC 2010, Intergency botulinum research coordinating committee meeting
    • Place of Presentation
      Atlanta, USA
    • Related Report
      2010 Annual Research Report
  • [Presentation] Reconstitution and dissection of epithelial barrier disrupting activity of type B botulinum HA.2010

    • Author(s)
      竹ヶ原夕紀、菅原庸、松村拓大、藤永由佳子
    • Organizer
      第83回日本細菌学会総会
    • Place of Presentation
      横浜
    • Related Report
      2009 Annual Research Report
  • [Presentation] ボツリヌスHAは上皮細胞バレア破壊因子である2009

    • Author(s)
      竹ヶ原夕紀、菅原庸、松村拓大、藤永由佳子
    • Organizer
      第62回日本細菌学会関西支部会
    • Place of Presentation
      大阪
    • Year and Date
      2009-11-14
    • Related Report
      2009 Annual Research Report
  • [Presentation] Structure and function of hemagglutinin from Clostridium botulinum.2009

    • Author(s)
      Kitadokoro, K., Takegahara, Y., Karatani, H., Fujinaga, Y.
    • Organizer
      The 9^<th> Awaji International Forum on Infection and Innmunity.
    • Place of Presentation
      淡路島
    • Related Report
      2009 Annual Research Report
  • [Presentation] 上皮細胞バリア破壊因子botulinum HAのサブユニット機能解析2009

    • Author(s)
      竹ヶ原夕紀、菅原庸、松村拓大、藤永由佳子
    • Organizer
      第82回日本生化学大会
    • Place of Presentation
      神戸
    • Related Report
      2009 Annual Research Report
  • [Presentation] Mechanism for Epithelial Barrier Disruption by Botulinum HA2009

    • Author(s)
      Takegahara, Y., Matsumura, T., Sugawara, Y., Fujinaga, Y.
    • Organizer
      Etox 14 (European Workshop on Bacterial Protein Toxins)
    • Place of Presentation
      Obernai, France
    • Related Report
      2009 Annual Research Report
  • [Presentation] Disruption of the Epithelial Barrier by Botulinum Hemagglutinin (HA) (招待講演)2009

    • Author(s)
      Yukako Fujinaga
    • Organizer
      Third Annual Botulinum Research Symposium
    • Place of Presentation
      Dartmouth, USA
    • Related Report
      2009 Annual Research Report

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Published: 2009-04-01   Modified: 2016-04-21  

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