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Role of KERP2 as a potential regulator in Entamoeba histolytica and the human host

Research Project

Project/Area Number 21K19372
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 49:Pathology, infection/immunology, and related fields
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) 津久井 久美子  国立感染症研究所, 寄生動物部, 主任研究官 (00420092)
サントス ハルベルト・ヒメネス  東京大学, 大学院医学系研究科(医学部), 助教 (90793779)
Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords原虫 / 宿主制御 / 分泌 / 核移行
Outline of Research at the Start

ウイルスや細菌・原虫などの細胞内寄生体で知られる分泌装置やエフェクターと独立して進化した、細胞外寄生体による前例のない宿主調節機構を解明する。腸管寄生性原虫赤痢アメーバの核内因子で、ヒト細胞との接触により放出され、ヒト細胞に取り込まれ核移行するリジングルタミン酸リッチタンパク質(KERP2)の宿主移行・調節機構を解明する。1. KERP2のヒト標的細胞を特定、2. KERP2の転写や脂質代謝調節因子としての可能性を検証、3. KERP2の輸送の機構を解明する。更に、4. 原虫由来の細胞透過性ペプチドによる運搬系の可能性を検証する。

Outline of Final Research Achievements

Entamoeba histolytica is a parasitic protist that heavily depends on parasite-host interactions. A comprehensive understanding of the proteins that mediate parasite-host interactions is essential for decoding this parasite's pathogenicity. A recently identified lysine and glutamic acid-rich proteins (KERPs) are known to interact with the brush border of human intestinal cells. In this study we investigated functional role of KERP2, by employing strategies such as epitope-tagging, gene silencing, and multi-omics. Our data suggest that KERP2 functions as a gene repressor, controlling ribosome biogenesis in the parasite. We also note that KERP2 exhibits translocation from the parasite to the enterocytes. We identified a panel of proteins that bound to KERP2 in Caco-2 cells. Furthermore, we also found that a set of genes from several pathways were regulated by KERP2 in humans.

Academic Significance and Societal Importance of the Research Achievements

以上の赤痢アメーバのKERP2に関する研究成果は、腸管内寄生原虫が、液性因子を放出して、宿主の細胞・組織に作用し、その機能や遺伝子発現をどのように修飾・制御するかを示す世界で初めての画期的な成果を提供したと言える。

Report

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

    (16 results)

All 2024 2023 2022 Other

All Int'l Joint Research (1 results) Journal Article (7 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 7 results,  Open Access: 7 results) Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] Indian Inst. of Sci. Educ. & Research(インド)

    • Related Report
      2023 Annual Research Report
  • [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] Glycerol biosynthetic pathway plays an essential role in proliferation and antioxidative defense in the human enteric protozoan parasite Entamoeba histolytica.2023

    • Author(s)
      Jeelani, G., Balogun, E. O., Husain, A., Nurkanto, A., Shiba, T., and Nozaki, T.
    • Journal Title

      Sci. Rep.

      Volume: 13(1) Issue: 1 Pages: 14596-14596

    • DOI

      10.1038/s41598-023-40670-z

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Transfer RNA-Derived Small RNAs in the Pathogenesis of Parasitic Protozoa2022

    • Author(s)
      Ruofan Peng, Herbert J. Santos, and Tomoyoshi Nozaki
    • Journal Title

      Genes

      Volume: 13 Issue: 2 Pages: 1-13

    • DOI

      10.3390/genes13020286

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Entamoeba histolytica EHD1 Is Involved in Mitosome-Endosome Contact2022

    • Author(s)
      Herbert J. Santos, Yuki Hanadate, Kenichiro Imai, Haruo Watanabe, and Tomoyoshi Nozaki
    • Journal Title

      mBio

      Volume: - Issue: 2 Pages: 1-20

    • DOI

      10.1128/mbio.03849-21

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Proteomic analysis of Atg8-dependent recruitment of phagosomal proteins in the enteric protozoan parasite Entamoeba histolytica,2022

    • Author(s)
      Nakada-Tsukui, K., Watanabe, N., Shibata, S., Whayuni, R., Miyamoto, E., Nozaki, T.
    • Journal Title

      Front Cel Inf Microbiol

      Volume: 12 Pages: 1-14

    • DOI

      10.3389/fcimb.2022.961645

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] PTEN differentially regulates endocytosis, migration, and proliferation in the enteric protozoan parasite Entamoeba histolytica.2022

    • Author(s)
      Kadri S, Nakada-Tsukui K, Watanabe N, Jeelani G, Nozaki T.
    • Journal Title

      PLoS Pathog.

      Volume: 18 Issue: 5 Pages: 1010147-1010147

    • DOI

      10.1371/journal.ppat.1010147

    • Related Report
      2022 Research-status 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 histolytica.2023

    • 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] Functional characterization of lysine and glutamic acid rich protein and tetraspanins on the human colon 3D crypts and animal models.2023

    • Author(s)
      Ruofan Peng, Jian Han, Herbert J. Santos, Natsuki Watanabe, Kumiko Nakada-Tsukui, Yumiko Saito-Nakano, and Tomoyoshi Nozaki.
    • Organizer
      XX International Seminar on Amebiasis
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Unraviling the role of KERPs as a potential gene regulator in Entamoeba histolytica2023

    • Author(s)
      Ruofan Peng, Herbert J. Santos, Tomoyoshi Nozaki
    • 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] A possible role of exosomal hydrolase receptors in the pathogenesis of the human intestinal parasite Entamoeba histolytica.2023

    • Author(s)
      Herbert J. Santos and Tomoyoshi Nozaki:
    • Organizer
      US-Japan Medical Sciences Program, Manila,
    • Related Report
      2022 Research-status Report
  • [Presentation] A possible role of exosomal hydrolase receptors in the pathogenesis of the human intestinal parasite Entamoeba histolytica2022

    • Author(s)
      Herbert Santos
    • Organizer
      第91回日本寄生虫学会
    • Related Report
      2022 Research-status Report
  • [Presentation] A Rho small GTPase which negatively regulates endocytosis in Entamoeba histolytica is involved in vesicular trafficking2022

    • Author(s)
      下山 真怜
    • Organizer
      第92回日本寄生虫学会
    • Related Report
      2022 Research-status Report
  • [Presentation] A possible role of exosomal hydrolase receptors in the pathogenesis of the human intestinal parasite Entamoeba histolytica.2022

    • Author(s)
      Herbert J. Santos and Tomoyoshi Nozaki
    • Organizer
      15th International Conference of Parasitology, Copenhagen
    • Related Report
      2022 Research-status Report

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Published: 2021-07-13   Modified: 2025-01-30  

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