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Role of TgGIF in suppression of anti-Toxoplasma immune response

Research Project

Project/Area Number 18K15135
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Ma Jisu  大阪大学, 微生物病研究所, 助教 (90755266)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsトキソプラズマ / インターフェロン / TgGIF / Gate-16 / IRGB6 / インターフェロンγ
Outline of Final Research Achievements

Toxoplasma gondii is one of the zoonotic pathogens causing fatal toxoplasmosis in humans and animals. In infected cells, a membrane structure called a parasite is formed, but host immunity produces interferon against this, and the interferon-induced GTPase is accumulated to destroy the parasite and protect the body. On the other hand, highly pathogenic T. gondii has various mechanisms that can suppress the interferon-induced GTPase-dependent immune response, but due to the large number of interferon-induced GTPases, there is no virulence factor for each. , This study found that it targets a factor called Gate-16.

Academic Significance and Societal Importance of the Research Achievements

トキソプラズマはエイズや抗がん剤投与下にある免疫不全者で致死的なトキソプラズマ症を引き起こす病原体である。また妊婦が初感染した場合にも、胎児に垂直感染し、重篤な先天性トキソプラズマ症を引き起こす。トキソプラズマ原虫はヒトを含む全ての恒温動物に感染する病原体であり、感染細胞内では寄生胞と呼ばれる膜の構造体を作り出し、その中で増殖する。我々宿主の免疫系は、インターフェロンと呼ばれる免疫物質を作り出し、それにより誘導される酵素が寄生胞に蓄積することで破壊する。今回の研究では、トキソプラズマがTgGIFと呼ばれる病原性分子を放出して、インターフェロン誘導性酵素を負に制御していることを発見した。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2019 2018

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

  • [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 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] CXCR4 regulates Plasmodium development in mouse and human hepatocytes2019

    • Author(s)
      Bando Hironori、Pradipta Ariel、Iwanaga Shiroh、Okamoto Toru、Okuzaki Daisuke、Tanaka Shun、Vega-Rodr?guez Joel、Lee Youngae、Ma Ji Su、Sakaguchi Naoya、Soga Akira、Fukumoto Shinya、Sasai Miwa、Matsuura Yoshiharu、Yuda Masao、Jacobs-Lorena Marcelo、Yamamoto Masahiro
    • Journal Title

      Journal of Experimental Medicine

      Volume: 216 Issue: 8 Pages: 1733-1748

    • DOI

      10.1084/jem.20182227

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Initial phospholipid-dependent Irgb6 targeting to Toxoplasma gondii vacuoles mediates host defense.2019

    • Author(s)
      Lee, Y., Yamada, H., Pradipta, A., Ma, J.S., Okamoto, M., Nagaoka, H., Takashima, E., Standley, D.M., Sasai, M., Takei, K., Yamamoto, M.
    • Journal Title

      Life Science Alliance

      Volume: 3 Issue: 1 Pages: 000-000

    • DOI

      10.26508/lsa.201900549

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Inducible Nitric Oxide Synthase Is a Key Host Factor for Toxoplasma GRA15-Dependent Disruption of the Gamma Interferon-Induced Antiparasitic Human Response2018

    • Author(s)
      Bando Hironori、Lee Youngae、Sakaguchi Naoya、Pradipta Ariel、Ma Ji Su、Tanaka Shun、Cai Yihong、Liu Jianfa、Shen Jilong、Nishikawa Yoshifumi、Sasai Miwa、Yamamoto Masahiro
    • Journal Title

      mBio

      Volume: 9 Issue: 5 Pages: 5-5

    • DOI

      10.1128/mbio.01738-18

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Toxoplasma Effector TgIST Targets Host IDO1 to Antagonize the IFN-γ-Induced Anti-parasitic Response in Human Cells2018

    • Author(s)
      Bando Hironori、Sakaguchi Naoya、Lee Youngae、Pradipta Ariel、Ma Ji Su、Tanaka Shun、Lai De-Hua、Liu Jianfa、Lun Zhao-Rong、Nishikawa Yoshifumi、Sasai Miwa、Yamamoto Masahiro
    • Journal Title

      Frontiers in Immunology

      Volume: 9 Pages: 2073-2073

    • DOI

      10.3389/fimmu.2018.02073

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research

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Published: 2018-04-23   Modified: 2021-02-19  

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