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Development of experimental model for surface antigens of human malaria parasite

Research Project

Project/Area Number 22K19434
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 InstitutionOsaka University

Principal Investigator

IWANAGA SHIROH  大阪大学, 微生物病研究所, 教授 (20314510)

Project Period (FY) 2022-06-30 – 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 2023: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywordsマラリア原虫 / 感染赤血球表面抗原 / 動物モデル / マラリア / ヒトマラリア / 表面抗原
Outline of Research at the Start

熱帯熱マラリア原虫は赤血球に感染した際、自身のタンパク質を感染赤血球表面へと提示し、宿主免疫を回避・抑制する。しかし、同原虫がヒトにしか感染しないため、in vivoでの機能評価はできない。これに対し、本研究では(1)熱帯熱マラリア原虫の赤血球表面抗原を発現する組換えネズミマラリア原虫の作出、(2)ヒト標的分子を発現するマウスの作製を試み、表面抗原に着目したマラリア動物モデルを開発する。これにより、前述の技術的な課題を解決し、表面抗原を標的としたワクチン・治療薬開発に貢献する。

Outline of Final Research Achievements

Among human malaria parasites, Plasmodium falciparum is the most virulent, causing severe symptoms such as fever, splenomegaly, and cerebral malaria a serious condition characterized by coma due to specific brain dysfunction. The parasite's genome contains numerous red blood cell surface antigen molecules (approximately 60 types of PfEMP1, about 200 types of RIFIN, and around 30 types of STEVOR), which the parasite uses to evade and suppress the host's immune system and to exhibit pathogenicity. However, because Plasmodium falciparum infects only humans, there is an urgent need to develop effective animal models. In this study, we successfully expressed RIFIN on the surface of red blood cells infected with rodent malaria parasites. The development of an animal model using this system is anticipated in the future.

Academic Significance and Societal Importance of the Research Achievements

本研究では熱帯熱マラリア研究の動物モデルを開発することを目標とし、熱帯熱マラリア原虫の感染赤血球表面抗原の一つであるRIFINをネズミマラリア原虫の感染赤血球表面に発現することを試みた。具体的にはネズミマラリア原虫の感染赤血球膜に局在するPbEMAP1にRIFINを融合発現する組換え原虫を作製した。最終的に2種類のRIFINについて、これらを感染赤血球表面に発現する原虫を作製した。この成果によってこれまで不可能であった熱帯熱マラリア原虫の感染赤血球表面抗原のin vivo研究が可能となり、ワクチン開発の重要な研究ツールとなると考えられた。

Report

(2 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (21 results)

All 2023 2022

All Journal Article (10 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Journal Article] PbAP2-FG2 and PbAP2R-2 function together as a transcriptional repressor complex essential for Plasmodium female development2023

    • Author(s)
      Nishi Tsubasa、Kaneko Izumi、Iwanaga Shiroh、Yuda Masao
    • Journal Title

      PLOS Pathogens

      Volume: 19 Issue: 2 Pages: 1010890-1010890

    • DOI

      10.1371/journal.ppat.1010890

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Toxoplasma IWS1 Determines Fitness in Interferon-γ-Activated Host Cells and Mice by Indirectly Regulating ROP18 mRNA Expression.2023

    • Author(s)
      Hashizaki Emi、Sasai Miwa、Okuzaki Daisuke、Nishi Tsubasa、Kobayashi Takashi、Iwanaga Shiroh、Yamamoto Masahiro
    • Journal Title

      mBio

      Volume: 14 Issue: 1

    • DOI

      10.1128/mbio.03256-22

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Targetome Analysis of Malaria Sporozoite Transcription Factor AP2-Sp Reveals Its Role as a Master Regulator2023

    • Author(s)
      Yuda Masao、Kaneko Izumi、Murata Yuho、Iwanaga Shiroh、Nishi Tsubasa
    • Journal Title

      mBio

      Volume: 14 Issue: 1 Pages: 02516-22

    • DOI

      10.1128/mbio.02516-22

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Plasmodium 6-cysteine proteins determine the commitment of sporozoites to liver-infection2023

    • Author(s)
      Yuda Masao、Kaneko Izumi、Murata Yuho、Iwanaga Shiroh、Okubo Kazuhiro、Nishi Tsubasa
    • Journal Title

      Parasitology International

      Volume: 93 Pages: 102700-102700

    • DOI

      10.1016/j.parint.2022.102700

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluating the mosquito host range of Getah virus and the vector competence of selected medically important mosquitoes in Getah virus transmission2023

    • Author(s)
      Azerigyik Faustus Akankperiwen、Faizah Astri Nur、Kobayashi Daisuke、Amoa-Bosompem Michael、Matsumura Ryo、Kai Izumi、Sasaki Toshinori、Higa Yukiko、Isawa Haruhiko、Iwanaga Shiroh、Ishino Tomoko
    • Journal Title

      Parasites and Vectors

      Volume: 16 Issue: 1 Pages: 99-99

    • DOI

      10.1186/s13071-023-05713-4

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Genome-wide functional screening of drug-resistance genes in Plasmodium falciparum2022

    • Author(s)
      Iwanaga Shiroh、Kubota Rie、Nishi Tsubasa、Kamchonwongpaisan Sumalee、Srichairatanakool Somdet、Shinzawa Naoaki、Syafruddin Din、Yuda Masao、Uthaipibull Chairat
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1

    • DOI

      10.1038/s41467-022-33804-w

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Layer-by-Layer Delivery of Multiple Antigens Using Trimethyl Chitosan Nanoparticles as a Malaria Vaccine Candidate2022

    • Author(s)
      Xu Yang、Zhou Ziyou、Brooks Brad、Ferguson Tammy、Obliosca Judy、Huang Jing、Kaneko Izumi、Iwanaga Shiroh、Yuda Masao、Tsuji Yukiko、Zhang Huitang、Luo Christina C.、Jiang Xunqing、Kong Xiang-Peng、Tsuji Moriya、Tison Christopher K.
    • Journal Title

      Frontiers in Immunology

      Volume: 13

    • DOI

      10.3389/fimmu.2022.900080

    • Related Report
      2022 Research-status Report
  • [Journal Article] Identification of a novel AP2 transcription factor in zygotes with an essential role in Plasmodium ookinete development2022

    • Author(s)
      Nishi Tsubasa、Kaneko Izumi、Iwanaga Shiroh、Yuda Masao
    • Journal Title

      PLOS Pathogens

      Volume: 18 Issue: 8 Pages: 1010510-1010510

    • DOI

      10.1371/journal.ppat.1010510

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of the Effect of Gene Duplication by Genome Editing on Drug Resistance in Plasmodium falciparum2022

    • Author(s)
      Kubota Rie、Ishino Tomoko、Iwanaga Shiroh、Shinzawa Naoaki
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 12

    • DOI

      10.3389/fcimb.2022.915656

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Immunization with CSP and a RIG-I Agonist is Effective in Inducing a Functional and Protective Humoral Response Against Plasmodium2022

    • Author(s)
      Teixeira Ana Rafaela、Prez-Cabezas Begoa、Costa David M.、S Mnica、Golba Sylvain、Sefiane-Djemaoune H lna、Ribeiro Joana、Kaneko Izumi、Iwanaga Shiroh、Yuda Masao、Tsuji Moriya、Boscardin Silvia Beatriz、Amino Rogerio、Cordeiro-da-Silva Anabela、Tavares Joana
    • Journal Title

      Frontiers in Immunology

      Volume: 13

    • DOI

      10.3389/fimmu.2022.868305

    • Related Report
      2022 Research-status Report
  • [Presentation] 熱帯熱マラリア原虫における転写因子AP2-Gの遺伝子座配列依存的ヘテロクロマチン形成機構の解明2023

    • Author(s)
      中嶋 舞、森 稔幸、岩永 史朗
    • Organizer
      第92回日本寄生虫学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] RIME法によるマラリア原虫雌生殖母体特異的転写抑制因子AP2-FG2の子ファクターの同定2023

    • Author(s)
      西翔、金子伊澄、岩永史朗、油田正夫
    • Organizer
      第92回日本寄生虫学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Genome-wide functional screening of drug-resistance genes in Plasmodium falciparum2023

    • Author(s)
      岩永史朗
    • Organizer
      第二回日本医学会連合ライジングスターリトリート
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Chromosome splitting of Plasmodium berghei using CRISPR/Cas9 system2022

    • Author(s)
      Daniel Addo Gyan, 松下遥香、塩谷天、西 翔、油田 正夫、新澤直明、石野智子、岩永史朗
    • Organizer
      第91回日本寄生虫学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 転写因子AP2-Zによるマラリア原虫接合体の遺伝子制御2022

    • Author(s)
      西 翔、金子 伊澄、岩永 史朗、油田 正夫
    • Organizer
      第91回日本寄生虫学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] マラリア原虫におけるヘテロクロマチン形成分子機構の解析2022

    • Author(s)
      森稔幸、中嶋舞、油田正夫、岩永史朗
    • Organizer
      第91回日本寄生虫学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 熱帯熱マラリア原虫におけるヘテロクロマチン局在因子AP2-HCの解析2022

    • Author(s)
      Mai Nakashima, Toshiyuki Mori, Tsubasa Nishi, Masao Yuda and Shiroh Iwanaga
    • Organizer
      第91回日本寄生虫学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Genome-wide functional screening of drug resistance gene in Plasmodium falciparum2022

    • Author(s)
      Shiroh Iwanaga, Masao Yuda
    • Organizer
      The 20th Awaji International Forum on Infection and Immunity
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Immune activating receptors specific for variant surface antigens of Plasmodium falciparum2022

    • Author(s)
      Akihito Sakoguchi, Samuel G. Chamberlain, Shiroh Iwanaga, Matthew K. Higgins, Hisashi Arase
    • Organizer
      第51回日本免疫学会集会
    • Related Report
      2022 Research-status Report
  • [Presentation] ヒトマラリア原虫の有性生殖制御遺伝子における、ヘテロクロマチン解除と転写制御の始点となるシスエレメントの同定2022

    • Author(s)
      中嶋 舞、森 稔幸、岩永 史朗
    • Organizer
      第45回日本分子生物学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Drug resistance of Malaria2022

    • Author(s)
      Shiroh Iwanaga
    • Organizer
      Asia Symposium on Social Implementation through the Asian Research Network under the COVID-19 Pandemic: From Research to Practice
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2022-07-05   Modified: 2025-01-30  

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