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2022 Fiscal Year Research-status Report

流行地変異株原虫に対するRipr5マラリア赤血球期ワクチン効果の検証

Research Project

Project/Area Number 21KK0138
Research InstitutionEhime University

Principal Investigator

高島 英造  愛媛大学, プロテオサイエンスセンター, 准教授 (50366762)

Co-Investigator(Kenkyū-buntansha) 長岡 ひかる  愛媛大学, プロテオサイエンスセンター, 研究員 (10757222)
森田 将之  愛媛大学, プロテオサイエンスセンター, 講師 (60709632)
Project Period (FY) 2021-10-07 – 2025-03-31
Keywordsマラリア / ワクチン / コムギ無細胞系 / 抗体
Outline of Annual Research Achievements

我々は逆ワクチン学的アプローチによって、新規なマラリア赤血球期ワクチン候補抗原であるRiprを見出した。しかしその構造と配列は非常に複雑かつ巨大であり、特に分子内にシステイン残基を87個も有するなど、ワクチン開発に困難であると考えられた。そこで更にRipr分子を11個の領域に切断し、同様な逆ワクチン学アプローチを行うことによって、PfRipr5を見出した。配列は非常に保存されているが、現在まで得られた情報は標準株に対する増殖阻害活性のみである点が課題として残されている。そこで本研究はケニアで得られた患者血液を用いて原虫をex vivoで抗Ripr抗体で増殖阻害活性を測定することにより、実際の流行株でもRiprが有効である事を検証するものである。
現在までに、複数の現地由来株の全ゲノム解析を行い、Ripr遺伝子配列の保存状態を確認した。その結果、他の地域と同様に高度に保存されている事がわかった。また本研究に必要なIRBの申請を行い、問題なく受理された。ex vivoに用いる抗体はすでに準備されており、標準株に対する増殖阻害活性の確認を実施済みである。

Current Status of Research Progress
Current Status of Research Progress

3: Progress in research has been slightly delayed.

Reason

コロナの影響もあり、R5年度、ようやくケニアでex vivo実験をする予定を立てることができた。

Strategy for Future Research Activity

ケニア、ホマベイ近隣のマウントケニア大学研究施設において、ex vivo実験を行う。

Causes of Carryover

コロナの影響でケニアでのex vivo計画に遅れが生じたため。R5年度に実施する予定。

  • Research Products

    (24 results)

All 2023 2022 Other

All Int'l Joint Research (5 results) Journal Article (14 results) (of which Int'l Joint Research: 12 results,  Peer Reviewed: 14 results,  Open Access: 14 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results)

  • [Int'l Joint Research] EVI(ドイツ)

    • Country Name
      GERMANY
    • Counterpart Institution
      EVI
  • [Int'l Joint Research] マウントケニア大学(ケニア)

    • Country Name
      KENYA
    • Counterpart Institution
      マウントケニア大学
  • [Int'l Joint Research] iBET(ポルトガル)

    • Country Name
      PORTUGAL
    • Counterpart Institution
      iBET
  • [Int'l Joint Research] WEHI/バーネット研究所/メルボルン大学(オーストラリア)

    • Country Name
      AUSTRALIA
    • Counterpart Institution
      WEHI/バーネット研究所/メルボルン大学
    • # of Other Institutions
      1
  • [Int'l Joint Research] ガーナ大学/野口記念医学研究所(ガーナ)

    • Country Name
      GHANA
    • Counterpart Institution
      ガーナ大学/野口記念医学研究所
  • [Journal Article] Naturally acquired antibodies to gametocyte antigens are associated with reduced transmission of Plasmodium vivax gametocytes to Anopheles arabiensis mosquitoes2023

    • Author(s)
      Tebeje Surafel K.、Chali Wakweya、Hailemeskel Elifaged、Ramjith Jordache、Gashaw Abrham、Ashine Temesgen、Nebret Desalegn、Esayas Endashaw、Emiru Tadele、Tsegaye Tizita、Teelen Karina、Lanke Kjerstin、Takashima Eizo、et al
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 12 Pages: -

    • DOI

      10.3389/fcimb.2022.1106369

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Identification of novel Plasmodium vivax proteins associated with protection against clinical malaria2023

    • Author(s)
      Mazhari Ramin、Takashima Eizo、Longley Rhea J.、Ruybal-Pesantez Shazia、White Michael T.、Kanoi Bernard N.、Nagaoka Hikaru、Kiniboro Benson、Siba Peter、Tsuboi Takafumi、Mueller Ivo
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 13 Pages: -

    • DOI

      10.3389/fcimb.2023.1076150

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Plasmodium vivax transmission-blocking vaccines: Progress, challenges and innovation2022

    • Author(s)
      Tachibana Mayumi、Takashima Eizo、Morita Masayuki、Sattabongkot Jetsumon、Ishino Tomoko、Culleton Richard、Torii Motomi、Tsuboi Takafumi
    • Journal Title

      Parasitology International

      Volume: 87 Pages: 102525~102525

    • DOI

      10.1016/j.parint.2021.102525

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Anti-Gametocyte Antigen Humoral Immunity and Gametocytemia During Treatment of Uncomplicated Falciparum Malaria: A Multi-National Study2022

    • Author(s)
      O’Flaherty Katherine、Chan Jo-Anne、Takashima Eizo、Tsuboi Takafumi、et al
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 12 Pages: -

    • DOI

      10.3389/fcimb.2022.804470

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] マラリアワクチン開発の最新情報2022

    • Author(s)
      高島英造
    • Journal Title

      病原微生物検出情報

      Volume: 43 Pages: 138-139

    • Peer Reviewed / Open Access
  • [Journal Article] Meta-Analysis of Human Antibodies Against Plasmodium falciparum Variable Surface and Merozoite Stage Antigens2022

    • Author(s)
      Takashima Eizo、Kanoi Bernard N.、Nagaoka Hikaru、Morita Masayuki、Hassan Ifra、Palacpac Nirianne M. Q.、Egwang Thomas G.、Horii Toshihiro、Gitaka Jesse、Tsuboi Takafumi
    • Journal Title

      Frontiers in Immunology

      Volume: 13 Pages: -

    • DOI

      10.3389/fimmu.2022.887219

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comparison of Antibody Responses and Parasite Clearance in Artemisinin Therapeutic Efficacy Studies in the Democratic Republic of Congo and Asia2022

    • Author(s)
      Cutts Julia C、O’Flaherty Katherine、Takashima Eizo、Tsuboi Takafumi、et al
    • Journal Title

      The Journal of Infectious Diseases

      Volume: 226 Pages: 324~331

    • DOI

      10.1093/infdis/jiac232

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Plasmodium vivax malaria serological exposure markers: Assessing the degree and implications of cross-reactivity with P.?knowlesi2022

    • Author(s)
      Longley Rhea J.、Grigg Matthew J.、Schoffer Kael、Obadia Thomas、Hyslop Stephanie、Piera Kim A.、Nekkab Narimane、Mazhari Ramin、Takashima Eizo、et al
    • Journal Title

      Cell Reports Medicine

      Volume: 3 Pages: 100662~100662

    • DOI

      10.1016/j.xcrm.2022.100662

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Asexual Blood-Stage Malaria Vaccine Candidate PfRipr5: Enhanced Production in Insect Cells2022

    • Author(s)
      Correia Ricardo、Fernandes B?rbara、Castro Rute、Nagaoka Hikaru、Takashima Eizo、Tsuboi Takafumi、Fukushima Akihisa、Viebig Nicola K.、Depraetere Hilde、Alves Paula M.、Rold?o Ant?nio
    • Journal Title

      Frontiers in Bioengineering and Biotechnology

      Volume: 10 Pages: -

    • DOI

      10.3389/fbioe.2022.908509

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Assessment of IgG3 as a serological exposure marker for Plasmodium vivax in areas with moderate?high malaria transmission intensity2022

    • Author(s)
      Tayipto Yanie、Rosado Jason、Gamboa Dionicia、White Michael T.、Kiniboro Benson、Healer Julie、Opi D. Herbert、Beeson James G.、Takashima Eizo、Tsuboi Takafumi、Harbers Matthias、Robinson Leanne、Mueller Ivo、Longley Rhea J.
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 12 Pages: -

    • DOI

      10.3389/fcimb.2022.950909

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Recruitment of Irgb6 to the membrane is a direct trigger for membrane deformation2022

    • Author(s)
      Yamada Hiroshi、Abe Tadashi、Nagaoka Hikaru、Takashima Eizo、Nitta Ryo、Yamamoto Masahiro、Takei Kohji
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 12 Pages: -

    • DOI

      10.3389/fcimb.2022.992198

    • Peer Reviewed / Open Access
  • [Journal Article] Towards identification and development of alternative vaccines against pregnancy-associated malaria based on naturally acquired immunity2022

    • Author(s)
      Rotich Alex K.、Takashima Eizo、Yanow Stephanie K.、Gitaka Jesse、Kanoi Bernard N.
    • Journal Title

      Frontiers in Tropical Diseases

      Volume: 3 Pages: -

    • DOI

      10.3389/fitd.2022.988284

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A novel asexual blood-stage malaria vaccine candidate: PfRipr5 formulated with human-use adjuvants induces potent growth inhibitory antibodies2022

    • Author(s)
      Takashima Eizo、Nagaoka Hikaru、Correia Ricardo、Alves Paula M.、Rold?o Ant?nio、Christensen Dennis、Guderian Jeffrey A.、Fukushima Akihisa、Viebig Nicola K.、Depraetere Hilde、Tsuboi Takafumi
    • Journal Title

      Frontiers in Immunology

      Volume: 13 Pages: -

    • DOI

      10.3389/fimmu.2022.1002430

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Vaccine co-display of CSP and Pfs230 on liposomes targeting two Plasmodium falciparum differentiation stages2022

    • Author(s)
      Huang Wei-Chiao、Mabrouk Moustafa T.、Zhou Luwen、Baba Minami、Tachibana Mayumi、Torii Motomi、Takashima Eizo、Locke Emily、Plieskatt Jordan、King C. Richter、Coelho Camila H.、Duffy Patrick E.、Long Carole、Tsuboi Takafumi、Miura Kazutoyo、Wu Yimin、Ishino Tomoko、Lovell Jonathan F.
    • Journal Title

      Communications Biology

      Volume: 5 Pages: -

    • DOI

      10.1038/s42003-022-03688-z

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Wheat-germ cell-free system; Antigen expression system for the post-genomic era2022

    • Author(s)
      Eizo Takashima
    • Organizer
      Institutional Seminar, Noguchi Memorial Institute for Medical Research, Univ. Ghana
    • Invited
  • [Presentation] コムギ無細胞系を基盤としたコアコンピタンス戦略によるマラリア研究2022

    • Author(s)
      高島英造
    • Organizer
      2022年度 山口大学 中高温微生物研究センター セミナー
    • Invited
  • [Presentation] A NOVEL BLOOD-STAGE MALARIA VACCINE CANDIDATE, PFRIPR5 FORMULATED WITH ADJUVANTS FOR HUMAN USE, INDUCED POTENT GROWTH INHIBITORY ANTIBODIES2022

    • Author(s)
      Eizo Takashima, Hikaru Nagaoka, Ricardo Correia, Antonio Roldao, Akihisa Fukushima, Nicola Viebig, Takafumi Tsuboi
    • Organizer
      15th International Congress of Parasitology (ICOPA)
    • Int'l Joint Research / Invited
  • [Presentation] Asexual blood-stage falciparum malaria vaccine candidate discovery with wheat-germ cell-free system2022

    • Author(s)
      Eizo Takashima
    • Organizer
      International Congress for Tropical Medicine and Malaria (ICTMM) 2020
    • Int'l Joint Research / Invited
  • [Presentation] PfRipr5, a novel blood-stage malaria vaccine candidate, formulated with adjuvants for human use, induced potent growth inhibitory antibodies2022

    • Author(s)
      Eizo Takashima, Hikaru Nagaoka, Ricardo Correia, Antonio Roldao, Akihisa Fukushima, Nicola Viebig, Takafumi Tsuboi
    • Organizer
      American Society of Tropical Medicine and Hygiene Meeting (ASTMH) 2022
    • Int'l Joint Research

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Published: 2023-12-25  

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