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Physiological mechanisms of membrane structures in P. falciparum gametocytes

Research Project

Project/Area Number 20K22767
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0803:Pathology, infection/immunology, and related fields
Research InstitutionNagasaki University

Principal Investigator

Miyazaki Shinya  長崎大学, 熱帯医学研究所, 助教 (40637435)

Project Period (FY) 2020-09-11 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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)
Keywords熱帯熱マラリア原虫 / ガメトサイト / 膜リモデリング / 赤血球 / マラリア原虫 / 膜構造 / タンパク質輸送 / 遺伝子改変
Outline of Research at the Start

熱帯熱マラリア原虫ガメトサイトが赤血球の細胞質内に新たに形成する膜構造物の生理的意義を解明する。熱帯熱マラリア原虫は、ヒト赤血球内でガメトサイトへと成熟分化することにより、蚊に感染する能力を得る。このガメトサイト分化の過程で、マラリア原虫は赤血球の細胞質内に新たな膜構造物を作り出すが、その生理的意義はよくわかっていない。本研究は、これらの膜構造物のガメトサイト分化における役割を明らかにするために、これら膜構造物の形成に必要なマラリア原虫のタンパク質を同定する。本研究により、ガメトサイト分化の生物学が深化し、将来的にはマラリア伝播阻止への新たな方策に貢献する。

Outline of Final Research Achievements

This study aimed to elucidate the physiological significance of the new membrane structures formed by Plasmodium falciparum gametocytes in the cytoplasm of erythrocytes. In this study, the principal investigators identified the conditions under which Plasmodium falciparum gametocytes efficiently form gametocytes. The membrane structures in erythrocytes infected with Plasmodium falciparum gametocytes were subsequently observed by electron microscopy. The results showed that infected erythrocytes have a characteristic membrane structure that differs from that of Plasmodium falciparum cells. Several plasmids for knockdown of proteins transported to erythrocytes during the gametocyte stage and translocon constituent proteins were generated and transfected, and analysis of the genetically modified Plasmodium is currently underway.

Academic Significance and Societal Importance of the Research Achievements

本研究は、マラリア原虫の基礎的な理解および抗伝播薬の創薬研究に資する。熱帯熱マラリア原虫はヒト赤血球内でガメトサイトへと分化し蚊へと感染するため、ガメトサイトを殺滅することができればマラリア伝播を抑制することができる。ガメトサイトが赤血球内に作り出す膜構造は、ガメトサイト性分化に関連していると推察されるため、その生理機構の理解は重要である。

Report

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

    (4 results)

All 2021

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (1 results)

  • [Journal Article] Creative interior design by Plasmodium falciparum: Lipid metabolism and the parasite's secret chamber2021

    • Author(s)
      Tokumasu Fuyuki、Hayakawa Eri H.、Fukumoto Junpei、Tokuoka Suzumi M.、Miyazaki Shinya
    • Journal Title

      Parasitology International

      Volume: 83 Pages: 102369-102369

    • DOI

      10.1016/j.parint.2021.102369

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Plasmodium falciparum SURFIN4.1 forms an intermediate complex with PTEX components and Pf113 during export to the red blood cell2021

    • Author(s)
      Miyazaki Shinya、Chitama Ben-Yeddy Abel、Kagaya Wataru、Lucky Amuza Byaruhanga、Zhu Xiaotong、Yahata Kazuhide、Morita Masayuki、Takashima Eizo、Tsuboi Takafumi、Kaneko Osamu
    • Journal Title

      Parasitology International

      Volume: 83 Pages: 102358-102358

    • DOI

      10.1016/j.parint.2021.102358

    • NAID

      120007166820

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Screening of viral-vectored P. falciparum pre-erythrocytic candidate vaccine antigens using chimeric rodent parasites2021

    • Author(s)
      Kolli Surendra Kumar、Salman Ahmed M.、Ramesar Jai、Chevalley-Maurel Severine、Kroeze Hans、Geurten Fiona G. A.、Miyazaki Shinya、Mukhopadhyay Ekta、Marin-Mogollon Catherin、Franke-Fayard Blandine、Hill Adrian V. S.、Janse Chris J.
    • Journal Title

      PLOS ONE

      Volume: 16 Issue: 7 Pages: 0254498-0254498

    • DOI

      10.1371/journal.pone.0254498

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] A critical role of the apicoplast protein PALM for Plasmodium falciparum sporozoite development in the mosquito2021

    • Author(s)
      Shinya Miyazaki, Catherin Marin-Mogollon, Yukiko Miyazaki, Fiona J.A. Geurten, Jai Ramesar, Surendra Kumar Kolli, Severine Chevalley-Maurel, Chris J. Janse, Blandine Franke-Fayard
    • Organizer
      第90回日本寄生虫学会総会
    • Related Report
      2021 Annual Research Report

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Published: 2020-09-29   Modified: 2023-01-30  

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