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Functional analysis of Beclin 1 regulating different stages during bacterial infection

Research Project

Project/Area Number 19K07537
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49050:Bacteriology-related
Research InstitutionKyoto University

Principal Investigator

Aikawa Chihiro  京都大学, 医学研究科, 助教 (70725499)

Co-Investigator(Kenkyū-buntansha) 野澤 孝志  京都大学, 医学研究科, 准教授 (10598858)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsA群レンサ球菌 / Beclin 1 / 細胞侵入 / AKT/PKB / ILK1 / オートファジー
Outline of Research at the Start

エンドサイトーシスとゼノファジーの両者を制御するBeclin 1は、細胞内の感染防御システムにとり“要の分子”であるが、両応答は異なる感染ステージで誘導されることから、Beclin 1の活性化メカニズムや相互作用分子もステージごとに異なると予測される。そこで、ステージごとにBeclin 1と相互作用する分子を同定するとともに、Beclin 1の持つ複数のリン酸化部位が、「何」により、「どの」感染ステージでリン酸化されるのか、そして、このリン酸化がエンドサイトーシスやゼノファジーを制御し得るかを評価することで、Beclin 1による細菌感染制御機構を明らかにする。

Outline of Final Research Achievements

Beclin 1 is important for the induction of both autophagy, an intracellular non-selective autophagosomal degradation mechanism induced during nutrient starvation, and selective autophagy induced during bacterial infection. We have previously shown that Beclin 1 regulates bacterial host cell invasion, and in this study, we identified ECD as the domain responsible for regulating cell invasion by Group A Streptococcus (GAS). In addition, detailed molecular analysis in GAS-infected cells revealed that GAS activates ILK1 through binding to host cell integrins, which in turn regulates GAS cell invasion via activation of AKT and finally Beclin 1-ECD.

Academic Significance and Societal Importance of the Research Achievements

Beclin 1が細菌に対する選択的オートファジーの制御だけでなく、細菌の宿主細胞への侵入制御にも関与することは、本分子が異なる感染ステーシにおいて重要なマルチロールプレーヤーとして宿主の感染制御に貢献していることを示唆している。本研究で得られた結果は、細菌と宿主間の相互作用を明らかにする上で学術的に意義のあるものであり、また細菌感染を制御する新たな薬剤の標的としてBeclin 1およびその相互作用分子の有用性を示したことは、社会的に意義があったと考えられる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2021 2020 2019

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (2 results) (of which Invited: 1 results)

  • [Journal Article] Single-chain variable fragment (scFv) targeting streptolysin O controls group A Streptococcus infection.2021

    • Author(s)
      Aikawa C, Kawashima K, Fukuzaki C, Nakakido M, Murase K, Nozawa T, Tsumoto K, Nakagawa I
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 20 Pages: 177-183

    • DOI

      10.1016/j.bbrc.2021.06.021

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characterization of a putative maltodextrin-binding protein of Streptococcus pyogenes, SPs0871 and the development of a VHH inhibitor2021

    • Author(s)
      Yamawaki T, Nakakido M, Ujiie K, Aikawa C, Nakagawa I, Tsumoto K
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 6 Pages: 1-7

    • DOI

      10.1016/j.bbrc.2021.05.056

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] TBC1D9 regulates TBK1 activation through Ca2+ signaling in selective autophagy.2020

    • Author(s)
      Nozawa T, Sano S, Minowa-Nozawa A, Toh H, Nakajima S, Murase K, Aikawa C, Nakagawa I.
    • Journal Title

      Nat Commun.

      Volume: 11 Issue: 1 Pages: 770-770

    • DOI

      10.1038/s41467-020-14533-4

    • NAID

      120006840172

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Group A Streptococcus establishes pharynx infection by degrading the deoxyribonucleic acid of neutrophil extracellular traps.2020

    • Author(s)
      Tanaka M, Kinoshita-Daitoku R, Kiga K, Sanada T, Zhu B, Okano T, Aikawa C, Iida T, Ogura Y, Hayashi T, Okubo K, Kurosawa M, Hirahashi J, Suzuki T, Nakagawa I, Nangaku M, Mimuro H.
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 3251-3251

    • DOI

      10.1038/s41598-020-60306-w

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Group A Streptococcus NAD-Glycohydrolase Inhibits Caveolin 1-Mediated Internalization Into Human Epithelial Cells.2019

    • Author(s)
      Toh H, Lin CY, Nakajima S, Aikawa C, Nozawa T, Nakagawa I.
    • Journal Title

      Front Cell Infect Microbiol.

      Volume: 9 Pages: 398-398

    • DOI

      10.3389/fcimb.2019.00398

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Group A Streptococcus modulates RAB1- and PIK3C3 complex-dependent autophagy.2019

    • Author(s)
      Toh H, Nozawa T, Minowa-Nozawa A, Hikichi M, Nakajima S, Aikawa C, Nakagawa I.
    • Journal Title

      Autophagy

      Volume: 14 Issue: 2 Pages: 1-13

    • DOI

      10.1080/15548627.2019.1628539

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] A群レンサ球菌の増殖に必要な鉄獲得機構に対する阻害剤の探索2021

    • Author(s)
      相川 知宏, 長門石 曉, 中木戸 誠, 妹尾 暁暢, 星野 将人, 野澤孝志, 村瀬一典, 津本 浩平, 中川 一路
    • Organizer
      第94回日本細菌学会総会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 化合物 H1 の A 群レンサ球菌増殖抑制メカニズムおよび抗菌薬と の併用効果の検証2020

    • Author(s)
      相川 知宏,星野 将人,中木戸 誠,長門石 曉,村瀬 一典, 津本 浩平,中川 一路
    • Organizer
      第93回日本細菌学会総会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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