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Survival strategy of Toxoplasma gondii in various human cells.

Research Project

Project/Area Number 19K16628
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49040:Parasitology-related
Research InstitutionTohoku University

Principal Investigator

Bando Hironori  東北大学, 農学研究科, 助教(研究特任) (60724367)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsトキソプラズマ / 脳神経 / グルタミン / 潜伏感染 / 潜伏感染虫体 / T.gondii / ヒト / iPSC / Toxoplasma gondii / human / virulence factor
Outline of Research at the Start

トキソプラズマは、ヒトを含め全ての恒温動物に感染することが可能な細胞内寄生生物である。近年、国内においてもトキソプラズマ感染の機会が増えていることから、トキソプラズマに関する研究が注目されてきている。トキソプラズマの研究はこれまで主にモデル生物であるマウスを用いて行われてきており、ヒトの細胞および生体内における宿主免疫とトキソプラズマ間相互作用は未だほとんど明らかとなっていない。そこで本研究では様々なヒトの細胞に着目し、ヒトの細胞内で機能するトキソプラズマの病原性因子の同定とその機能の解析を行うことで、ヒト-トキソプラズマ間相互作用を包括的に理解する。

Outline of Final Research Achievements

Toxoplasma gondii is an obligate intracellular protozoan parasite that can infect the nucleated cells of all warm-blooded animals including humans. Despite the fact that immunocompromised patients or pregnant women can cause severe toxoplasmosis when first infected, no effective curative treatment or prevention techniques have yet been established. In this study, we elucidated one part of the mechanism by which Toxoplasma latently infects human brain, and discovered compounds that inhibit the virulence mechanism of T. gondii and latent infection.

Academic Significance and Societal Importance of the Research Achievements

本研究において、トキソプラズマが脳に感染すると、脳神経細胞の中で潜伏感染することを明らかにしました。さらに、トキソプラズマが脳神経細胞の代謝に及ぼす影響とそのメカニズム、そして潜伏感染機構を明らかにしました。これらの成果は、長年不明のままであった寄生虫の潜伏感染メカニズムを解明した点で学術的意義の高い成果です。また今後、トキソプラズマの感染を制御するための新たな技術、あるいは新薬の開発に繋がることが期待されるため、社会的・医学的意義の高い成果です。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (22 results)

All 2022 2021 2020 2019

All Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 6 results) Presentation (13 results) (of which Int'l Joint Research: 3 results,  Invited: 6 results) Book (1 results)

  • [Journal Article] Depletion of Intracellular Glutamine Pools Triggers Toxoplasma gondii Stage Conversion in Human Glutamatergic Neurons2022

    • Author(s)
      Bando Hironori、Fukuda Yasuhiro、Watanabe Nina、Olawale Jeje Temitope、Kato Kentaro
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 11 Pages: 788303-788303

    • DOI

      10.3389/fcimb.2021.788303

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Immune evasion mechanisms of the zoonotic protozoan parasite Toxoplasma gondii in mammalian hosts.2021

    • Author(s)
      BANDO Hironori, FUKUDA Yasuhiro, YAMAMOTO Masahiro, KATO Kentaro
    • Journal Title

      Journal of Integrated Field Science

      Volume: 18 Pages: 13-17

    • NAID

      120007028692

    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Journal Article] Immune evasion mechanisms of the zoonotic protozoan parasite Toxoplasma gondii in mammalian hosts.2021

    • Author(s)
      Bando H, Fukuda Y, Yamamoto M, Kato K.
    • Journal Title

      Journal of Integrated Field Science

      Volume: 18

    • NAID

      120007028692

    • Related Report
      2020 Research-status Report
  • [Journal Article] Human GBP1 Differentially Targets Salmonella and Toxoplasma to License Recognition of Microbial Ligands and Caspase-Mediated Death2020

    • Author(s)
      Fisch Daniel、Clough Barbara、Domart Marie-Charlotte、Encheva Vesela、Bando Hironori、Snijders Ambrosius P.、Collinson Lucy M.、Yamamoto Masahiro、Shenoy Avinash R.、Frickel Eva-Maria
    • Journal Title

      Cell Reports

      Volume: 32 Issue: 6 Pages: 108008-108008

    • DOI

      10.1016/j.celrep.2020.108008

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Role of Gate-16 and Gabarap in Prevention of Caspase-11-Dependent Excess Inflammation and Lethal Endotoxic Shock2020

    • Author(s)
      Sakaguchi Naoya、Sasai Miwa、Bando Hironori、Lee Youngae、Pradipta Ariel、Ma Ji Su、Yamamoto Masahiro
    • Journal Title

      Frontiers in Immunology

      Volume: 11 Pages: 561948-561948

    • DOI

      10.3389/fimmu.2020.561948

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nullscript inhibits Cryptosporidium and Toxoplasma growth2020

    • Author(s)
      Murakoshi Fumi、Bando Hironori、Sugi Tatsuki、Adeyemi Oluyomi Stephen、Nonaka Motohiro、Nakaya Takaaki、Kato Kentaro
    • Journal Title

      International Journal for Parasitology: Drugs and Drug Resistance

      Volume: 14 Pages: 159-166

    • DOI

      10.1016/j.ijpddr.2020.10.004

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Toxoplasma gondii effectors TgIST and TgGRA15 differentially target host IDO1 to antagonize the IFN-γ-induced anti-T. gondii response in human cells.2020

    • Author(s)
      Bando H, Fukuda Y, Yamamoto M, Kato K.
    • Journal Title

      Journal of Integrated Field Science

      Volume: 17 Pages: 22-25

    • NAID

      120006879690

    • Related Report
      2020 Research-status Report
  • [Journal Article] Toxoplasma Effector GRA15-Dependent Suppression of IFN-γ-Induced Antiparasitic Response in Human Neurons2019

    • Author(s)
      Bando Hironori、Lee Youngae、Sakaguchi Naoya、Pradipta Ariel、Sakamoto Ryoma、Tanaka Shun、Ma Ji Su、Sasai Miwa、Yamamoto Masahiro
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 9 Pages: 140-140

    • DOI

      10.3389/fcimb.2019.00140

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 原虫感染に際して腸管上皮細胞の非古典的MAPKが果たす役割2021

    • Author(s)
      伴戸寛徳、渡邊仁奈、村越ふみ、福田康弘、加藤健太郎
    • Organizer
      分子生物学会第44回大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 人獣共通感染性原虫の寄生メカニズムに関する研究2021

    • Author(s)
      伴戸 寛徳
    • Organizer
      第20回日本農学進歩賞受賞記念講演
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 肝臓期マラリア原虫の形態変化メカニズムの解明2021

    • Author(s)
      伴戸 寛徳
    • Organizer
      第164回日本獣医学会学術集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 脳神経細胞内グルタミン濃度の変化がトキソプラズマの潜伏感染虫体形成に及ぼす影響2021

    • Author(s)
      伴戸 寛徳, 福田 康弘, 加藤 健太郎
    • Organizer
      第164回日本獣医学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ヒト脳神経細胞におけるトキソプラズマの潜伏感染虫体形成メカニズムの解明2021

    • Author(s)
      伴戸 寛徳, 福田 康弘, 加藤 健太郎
    • Organizer
      第 90 回日本寄生虫学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Toxoplasma gondii effectors TgIST and TgGRA15 differentially target host IDO1 to antagonize the IFN-γ-induced anti-T. gondii response in human cells2020

    • Author(s)
      Hironori Bando
    • Organizer
      The 17th International Symposium on Integrated Field Science
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Immune evasion mechanisms of the zoonotic protozoan parasite Toxoplasma gondii in mammalian hosts2020

    • Author(s)
      Hironori Bando
    • Organizer
      International Virtual Symposium "New Insights on Animal Science
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ヒトの脳細胞における宿主-トキソプラズマ間相互作用の解明2020

    • Author(s)
      伴戸寛徳
    • Organizer
      第163回日本獣医学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] 蚊の腸内細菌がマラリア原虫の有性生殖期に及ぼす影響の解明2020

    • Author(s)
      伴戸寛徳
    • Organizer
      第43回 日本分子生物学会年会 フォーラム
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 第89回日本寄生虫学会2020

    • Author(s)
      伴戸寛徳
    • Organizer
      ヒトの脳神経細胞内におけるトキソプラズマのステージ変換メカニズムの解明
    • Related Report
      2020 Research-status Report
  • [Presentation] Toxoplasma gondii effectors TgIST and TgGRA15 differentially target host IDO1 to antagonize the IFN-γ-induced anti-T. gondii response in human cells2020

    • Author(s)
      Hironori Bando, Yasuhiro Fukuda, Masahiro Yamamoto, Kentaro Kato
    • Organizer
      The 17 th International Symposium on Integrated Field Science
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ヒト脳細胞における宿主-トキソプラズマ間相互作用の解明2019

    • Author(s)
      伴戸 寛徳, 山本雅裕, 加藤健太郎
    • Organizer
      第162回日本獣医学会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] ヒト脳細胞におけるトキソプラズマのステージ変換機構の解明2019

    • Author(s)
      伴戸 寛徳, 加藤健太郎
    • Organizer
      第27回分子寄生虫学ワークショップ/ 第17回分子寄生虫・マラリア研究フォーラム合同大会
    • Related Report
      2019 Research-status Report
  • [Book] 食品由来病原体であるトキソプラズマの感染制御に向けた研究基盤の構築2021

    • Author(s)
      伴戸寛徳
    • Publisher
      アグリバイオ、北隆館
    • Related Report
      2021 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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