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Interactions between tick oogenesis-related molecules and parasites in the transovarial transmission of Babesia

Research Project

Project/Area Number 19K06416
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 42020:Veterinary medical science-related
Research InstitutionObihiro University of Agriculture and Veterinary Medicine

Principal Investigator

Rika Shirafuji  帯広畜産大学, 原虫病研究センター, 准教授 (00549909)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
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)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsマダニ / 原虫 / バベシア / 介卵伝播 / 卵形成 / 卵黄タンパク質前駆体 / 卵黄タンパク質前駆体受容体 / 獣医学
Outline of Research at the Start

マダニ媒介性原虫は、マダニ体内での物理的・免疫学的防御反応を巧みに回避し、発育・増殖し、伝播する。申請者はこれまで、マダニの卵母細胞の成熟に必要不可欠な卵黄タンパク質前駆体(ビテロジェニン;Vg)の量が、原虫感染マダニにおいて増加したことを見出した。そこで、マダニにおけるVgおよびVg受容体(VgR)などの卵形成関連分子が原虫の介卵伝播成立に寄与するのではないか、との仮説を立て、マダニ卵形成関連分子と原虫との分子間相互作用を解明する本研究課題を企画した。具体的には、①原虫と結合するマダニ卵形成関連分子を特定し、②その分子についてRNA干渉法により遺伝子機能を抑制し、原虫の介卵伝播能を検証する。

Outline of Final Research Achievements

Babesia, a tick-borne protozoan parasite, infects various organs such as the ovary in ticks, but the molecular mechanism is largely unknown. In this study, we examined the interactions between Babesia and tick oogenesis-related molecules, such as egg yolk protein precursor (vitellogenin; Vg) present in the hemolymph and Vg receptor (VgR) on the surface of oocytes, during the pre-oviposition period. It was found that the Babesia DNA level in the hemolymph was the highest 1 day after engorgement, which has immature oocytes in the ovary, and that Vg-2 is an essential molecule for the transmission of Babesia to the ovary.

Academic Significance and Societal Importance of the Research Achievements

本研究では、バベシア感染マダニモデルを用い、マダニの卵母細胞成熟過程におけるバベシア感染の時系列ならびにバベシア-卵形成関連分子間相互作用の一端を明らかにした。これまで抗マダニワクチン候補分子として注目されることが極めて少なかった卵形成関連分子を解析対象とし、バベシア原虫介卵伝播における卵黄タンパク質前駆体(Vg-2)の重要性を見出した本研究成果は、将来の原虫伝播阻止ワクチンの開発研究へと発展させるための有用な基礎的知見である。

Report

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

    (12 results)

All 2021 2020 2019 Other

All Journal Article (6 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (3 results) (of which Invited: 1 results) Book (1 results) Remarks (2 results)

  • [Journal Article] Data from expressed sequence tags from the organs and embryos of parthenogenetic Haemaphysalis longicornis2021

    • Author(s)
      Umemiya-Shirafuji Rika、Zhou Jinlin、Liao Min、Battsetseg Badgar、Boldbaatar Damdinsuren、Hatta Takeshi、Kuboki Thasaneeya、Sakaguchi Takeshi、Chee Huey Shy、Miyoshi Takeharu、Huang Xiaohong、Tsuji Naotoshi、Xuan Xuenan、Fujisaki Kozo
    • Journal Title

      BMC Research Notes

      Volume: 14 Issue: 1 Pages: 326-326

    • DOI

      10.1186/s13104-021-05740-3

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Identification of Haemaphysalis longicornis Genes Differentially Expressed in Response to Babesia microti Infection2020

    • Author(s)
      Zheng Weiqing、Umemiya-Shirafuji Rika、Chen Shengen、Okado Kiyoshi、Adjou Moumouni Paul Franck、Suzuki Hiroshi、Yang Shu、Liu Mingming、Xuan Xuenan
    • Journal Title

      Pathogens

      Volume: 9 Issue: 5 Pages: 378-378

    • DOI

      10.3390/pathogens9050378

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Porin Expression Profiles in Haemaphysalis longicornis Infected With Babesia microti2020

    • Author(s)
      Zheng Weiqing、Umemiya-Shirafuji Rika、Zhang Qian、Okado Kiyoshi、Adjou Moumouni Paul Franck、Suzuki Hiroshi、Chen Haiying、Liu Mingming、Xuan Xuenan
    • Journal Title

      Frontiers in Physiology

      Volume: 11 Pages: 502-502

    • DOI

      10.3389/fphys.2020.00502

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hard ticks as research resources for vector biology: from genome to whole-body level2019

    • Author(s)
      Umemiya-Shirafuji R, Fujisaki K, Okado K, Adjou Moumouni PF, Yokoyama N, Suzuki H, Inoue N, Xuan X.
    • Journal Title

      Medical Entomology and Zoology

      Volume: 70 Issue: 4 Pages: 181-188

    • DOI

      10.7601/mez.70.181

    • NAID

      130007772674

    • ISSN
      0424-7086, 2185-5609
    • Year and Date
      2019-12-25
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Basic studies on tick oogenesis for elucidation of molecular mechanisms underlying transovarial transmission of protozoan parasites in hard ticks2019

    • Author(s)
      白藤(梅宮) 梨可
    • Journal Title

      Medical Entomology and Zoology

      Volume: 70 Issue: 3 Pages: 137-140

    • DOI

      10.7601/mez.70.137

    • NAID

      130007733290

    • ISSN
      0424-7086, 2185-5609
    • Year and Date
      2019-09-25
    • Related Report
      2019 Research-status Report
  • [Journal Article] Intracellular localization of vitellogenin receptor mRNA and protein during oogenesis of a parthenogenetic tick, Haemaphysalis longicornis2019

    • Author(s)
      Umemiya-Shirafuji R, Mihara R, Fujisaki K, Suzuki H.
    • Journal Title

      Parasites & Vectors

      Volume: 12 Issue: 1 Pages: 205-205

    • DOI

      10.1186/s13071-019-3469-9

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] フタトゲチマダニにおけるATAQ遺伝子の発現解析2021

    • Author(s)
      直正宗一郎、佐藤成子、Bumduuren Tuvshintulga、鈴木宏志、白藤(梅宮)梨可
    • Organizer
      第30回日本ダニ学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] マダニにおける原虫の介卵伝播メカニズム2019

    • Author(s)
      白藤梨可
    • Organizer
      第71回日本衛生動物学会大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Babesia ovata感染フタトゲチマダニにおける卵形成関連分子の役割2019

    • Author(s)
      白藤(梅宮) 梨可、國寄 真希、岡田 美穂、鈴木 宏志.
    • Organizer
      第28回日本ダニ学会大会
    • Related Report
      2019 Research-status Report
  • [Book] Distribution, seasonal occurrence, and biological characteristics of Haemaphysalis longicornis, a vector of bovine piroplasmosis in Japan. (In Climate, Ticks and Disease; Editor: Pat Nuttall)2021

    • Author(s)
      Umemiya-Shirafuji R
    • Total Pages
      592
    • Publisher
      CABI
    • Related Report
      2021 Annual Research Report
  • [Remarks] 帯広畜産大学 原虫病研究センター

    • URL

      https://www.obihiro.ac.jp/facility/protozoa/

    • Related Report
      2021 Annual Research Report 2020 Research-status Report 2019 Research-status Report
  • [Remarks] 帯広畜産大学 原虫病研究センター 論文リスト(2019)

    • URL

      https://www.obihiro.ac.jp/facility/protozoa/publication-2019

    • Related Report
      2019 Research-status Report

URL: 

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

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