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Functional analysis of lipid transfer proteins from Entamoeba histolytica

Research Project

Project/Area Number 21H02723
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 49040:Parasitology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Nozaki Tomoyoshi  東京大学, 大学院医学系研究科(医学部), 教授 (60198588)

Co-Investigator(Kenkyū-buntansha) 渡邊 菜月  東京大学, 大学院医学系研究科(医学部), 客員研究員 (00883323)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2023: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2022: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Keywords脂質 / 輸送 / 感染症 / 寄生虫 / 病原機構
Outline of Research at the Start

真核生物においてフォスファチジルイノシトールリン酸(PIPs)の種類・量・局在が時空間的に制御されることは高次機能において必須である。本研究では脂質、特にシグナル伝達、細胞骨格、小胞輸送、遺伝子発現など多くの必須の細胞機能の制御に不可欠な役割を果たすPIPsの細胞内輸送を担う脂質輸送タンパク質(LTP)を基軸として、赤痢アメーバの病原機構におけるLTPの役割と制御機構を理解することを目指す。特にゲノム中で最も多様なアイソタイプとして存在するSTARTドメインを含むタンパク質のうち、先行研究により重要性の示された3種類のLTPを中心として、赤痢アメーバの病原機構における脂質輸送分子基盤を確立する。

Outline of Final Research Achievements

Phospholipids, their biosynthesis, and functional implications in the nucleus have been recently unraveled from eukaryotes. In the present study, we have identified for the first time a lipid transfer protein (LTP) from a protozoan parasite E. histolytica (EhLTP15) that is involved in nuclear-cytoplasmic lipid transport and regulation of nuclear lipid metabolism and homeostasis. EhLTP15 translocated from the nucleus to the cytoplasm under nutrient deprived conditions. EhLTP15 was also involved in exocytosis of pinocytosed fluid phase maker and secretion of lysosomal enzymes, cysteine proteases, which are implicated for virulence and tissue invasion of this enteric pathogen. EhLTP15 was also involved in the defense against oxidative stress. Furthermore, EhLTP15 was necessary to maintain the levels of nuclear phosphoinositides. This study has provided a link between non-vesicular lipid transport and nuclear lipid metabolism for the first time in any unicellular eukaryotes.

Academic Significance and Societal Importance of the Research Achievements

本研究成果はLTPsの核内のリン脂質の代謝と病原性への関与を原虫で初めて示した点で極めて新規性が高く、更に、真核生物におけるLTPsの多様性と機能の進化と普遍性の理解の助けとなった。同時に、本研究成果は赤痢アメーバの治療・予防への応用を可能とする基盤的な成果となった。本研究成果は他の寄生虫症やヒトの疾患の病態や治療法の理解に役立つ情報を提供したということができる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (22 results)

All 2024 2023 2022 2021

All Journal Article (6 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (15 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results) Funded Workshop (1 results)

  • [Journal Article] Tetraspanin-enriched microdomains play an important role in pathogenesis in the protozoan parasite Entamoeba histolytica2024

    • Author(s)
      Han Jiang*, Herbert J. Santos*, and Tomoyoshi Nozaki.
    • Journal Title

      bioRxiv.

      Volume: - Pages: 489-489

    • DOI

      10.1101/2024.03.27.586913

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Molecular dissection of phagocytosis by proteomic analysis in Entamoeba histolytica.2023

    • Author(s)
      Watanabe, M., Nakada-Tsukui, K., Nozaki, T.
    • Journal Title

      Genes (Basel).

      Volume: 14 Issue: 2 Pages: 379-379

    • DOI

      10.3390/genes14020379

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Attenuation of In Vitro and In Vivo Virulence Is Associated with Repression of Gene Expression of AIG1 Gene in Entamoeba histolytica2023

    • Author(s)
      Lozano-Mendoza J, Ramirez-Montiel F, Rangel-Serrano A, Paramo-Perez I, Mendoza-Macias C, Saavedra-Salazar F, Franco B, Vargas-Maya N, Jeelani G, Saito-Nakano Y, Anaya-Velazquez F, Nozaki T, Padilla-Vaca F
    • Journal Title

      Pathogens

      Volume: 12 Issue: 3 Pages: 489-489

    • DOI

      10.3390/pathogens12030489

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Non-vesicular lipid transport machinery in Leishmania donovani: functional implications in host-parasite interaction2023

    • Author(s)
      Das, K. and Nozaki, T.
    • Journal Title

      Int J Mol Sci

      Volume: 24 Issue: 13 Pages: 10637-10637

    • DOI

      10.3390/ijms241310637

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Investigating genetic polymorphism in E. histolytica isolates with distinct clinical phenotypes.2023

    • Author(s)
      Sardar SK, Ghosal A, Haldar T, Das K, Saito-Nakano Y, Kobayashi S, Dutta S, Nozaki T, Ganguly S.
    • Journal Title

      Parasitol. Res.

      Volume: 122(11) Issue: 11 Pages: 2525-2537

    • DOI

      10.1007/s00436-023-07952-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Two StAR-related lipid transfer proteins play specific roles in endocytosis, exocytosis, and motility in the parasitic protist Entamoeba histolytica2021

    • Author(s)
      Das Koushik、Watanabe Natsuki、Nozaki Tomoyoshi
    • Journal Title

      PLOS Pathogens

      Volume: 17 Issue: 4 Pages: 1009551-1009551

    • DOI

      10.1371/journal.ppat.1009551

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] A possible role of exosomal hydrolase receptors in the pathogenesis of the human intestinal parasite Entamoeba histolytica (poster)2023

    • Author(s)
      Herbert J. Santos, Jiang Han, Tomoyoshi Nozaki
    • Organizer
      75th Annual Meeting of the Japanese Society for Cell Biology
    • Related Report
      2023 Annual Research Report
  • [Presentation] Functional analysis of the membrane protein TSPAN4 in Entamoeba histolytica2023

    • Author(s)
      Han Jiang, Herbert J. Santos, Tomoyoshi Nozaki.
    • Organizer
      第75回日本細胞生物学会大会. シンポジウム: 寄生性原虫の細胞生物学から発信する新しい細胞機能研究
    • Related Report
      2023 Annual Research Report
  • [Presentation] 寄生性原虫赤痢アメーバが肝膿瘍形成に必要とするトランスゴルジ輸送2023

    • Author(s)
      中野 由美子, 牧内 貴志, 栃倉 麻美, 津久井 久美子, Carol A. Gilchrist, William A. Petri Jr, 野崎 智義
    • Organizer
      第75回日本細胞生物学会大会. シンポジウム: 寄生性原虫の細胞生物学から発信する新しい細胞機能研究
    • Related Report
      2023 Annual Research Report
  • [Presentation] 赤痢アメーバの小胞輸送を制御するレトロマー複合体の機能分化:2 種のVps35 アイソタイプの機能解析2023

    • Author(s)
      渡辺菜月、津久井久美子、野崎智義
    • Organizer
      第75回日本細胞生物学会大会. シンポジウム: 寄生性原虫の細胞生物学から発信する新しい細胞機能研究
    • Related Report
      2023 Annual Research Report
  • [Presentation] A Rho small GTPase which negatively regulates endocytosis in Entamoeba histolytica is involved in vesicular trafficking2023

    • Author(s)
      Misato Shimoyama, Kumiko Nakada-Tsukui, Tomoyoshi Nozaki,
    • Organizer
      第92回日本寄生虫学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 腸管寄生性原虫赤痢アメーバにおいて生・死細胞は異なる認識過程を経て取り込まれる2023

    • Author(s)
      津久井久美子、柴田久美子、上杉優佳、黒坂香帆里、野崎智義
    • Organizer
      第92回日本寄生虫学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 腸管寄生性原虫赤痢アメーバにおけるRho Gタンパク質EhRacMの機能解析―小胞輸送を介したマクロピノサイトーシスと運動の制御―2023

    • Author(s)
      下山真怜、津久井久美子、野崎智義
    • Organizer
      第29回分子寄生虫学ワークショップ/19回分子寄生虫・マラリア研究フォーラム合同大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] A Rho small GTPase EhRacM is involved in vesicular trafficking and negatively regulates macropinocytosis in Entamoeba histolytica2023

    • Author(s)
      Misato Shimoyama, Kumiko Nakada-Tsukui, Tomoyoshi Nozaki.
    • Organizer
      XXXIV Molecular Parasitology Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Rapid identification of miltefosine-resistant loci using the Entamoeba histolytica mutator strain.2023

    • Author(s)
      Saito-Nakano Y, Izumiyama S, Hirai M, Kawano-Sugaya T, Jeelani G, K Sardar SK, Ganguly S, Nozaki T.
    • Organizer
      XX International Seminar on Amebiasis.
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Gene expansion and multiple combinations confer retromer functional diversity in traffic in Entamoeba histolytica2023

    • Author(s)
      Watanabe N, Nakada-Tsukui K, Nozaki T.
    • Organizer
      XX International Seminar on Amebiasis
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Rho small GTPase EhRacM is involved in vesicular trafficking and negatively regulates macropinocytosis in Entamoeba histolytica2023

    • Author(s)
      Misato Shimoyama, Kumiko Nakada-Tsukui, Tomoyoshi Nozaki.
    • Organizer
      XX International Seminar on Amebiasis
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Molecular basis of target recognition and internalization during phagocytosis and trogocytosis in the enteric protozoan parasite Entamoeba histolytica (腸管寄生性原虫赤痢アメーバにおけるファゴサイトーシス、トロゴサイトーシス標的細胞の認識と取り込みの分子機構)2023

    • Author(s)
      Kumiko Nakada-Tsukui, Misato Shimoyama, Kumiko Shibata, Natsuki Watanabe, Yuka Uesugi, Tomoyoshi Nozaki,
    • Organizer
      第46回日本分子生物学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Rho small GTPases regulate motility and endocytic pathways in isotype-specific fashion in the enteric protozoan parasite Entamoeba histolytica2023

    • Author(s)
      Misato Shimoyama, Tomoyoshi Nozaki, Kumiko Nakada-Tsukui,
    • Organizer
      U.S.-Japan Cooperative Medical Sciences Program (USJCMSP), U.S -Japan Parasitic Diseases Joint Panel Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The elucidation of functional implication about lipid transfer proteins of E. histolytica involved nucleus-cytoplasm trafficking2023

    • Author(s)
      水上 颯太
    • Organizer
      第92回日本寄生虫学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 腸管寄生虫、赤痢アメーバにおける核ー細胞質間の脂質輸送タンパク質の同定と特性評価2022

    • Author(s)
      水上 颯太
    • Organizer
      第45回日本分子生物学会
    • Related Report
      2022 Annual Research Report
  • [Funded Workshop] Seminar: Efficient removal of apoptotic cells during tissue injury via chimeric receptors for efferocytosis2022

    • Related Report
      2022 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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