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Molecular mechanisms of thrombocytopenia in canine babesiosis

Research Project

Project/Area Number 19K06378
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 InstitutionIwate University

Principal Investigator

Otsuka Yayoi  岩手大学, 農学部, 客員准教授 (30396303)

Co-Investigator(Kenkyū-buntansha) 山崎 真大  岩手大学, 農学部, 教授 (40322846)
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 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
KeywordsBabesia gibsoni / 血小板減少症 / 熱ショック蛋白質70 / 抗血小板抗体 / サイトカイン / バベシア症 / 分子病態 / 血小板抗原 / 血小板活性化因子
Outline of Research at the Start

バベシア原虫の寄生に起因するバベシア症は、溶血性貧血とともに必ず血小板減少症が起こる。本研究では犬バベシア症の血小板減少症における分子病態の解明を目的に、以下の2つの機序を証明する。一つは抗BgHSP70抗体などの原虫由来蛋白質に対する抗体が宿主である犬の血小板蛋白質と交差反応を示すことによる血小板減少症発症機序、二つ目は原虫が表面あるいは放出蛋白質を介し血小板の活性化を誘発し、結果として血小板の凝集や大量消費を招く可能性である。本研究の遂行により、これまで血小板への直接的関係が不明であったバベシア症の血小板減少症発症機序の解明ならびに血小板感染防御や治療・制圧のための標的分子発見ができる。

Outline of Final Research Achievements

To elucidate the mechanism of thrombocytopenia in Babesiosis, this study was conducted based on the hypothesis that the defense response triggered by B. gibsoni-derived proteins plays an important role in the pathogenesis of platelets in babesiosis. As a result, it was suggested that the cross-reaction of antigen-antibody reactions induced by heat shock protein 70 and other proteins of B. gibsoni also extends to canine platelets. In addition, the elevation of serum IL-8 were observed in B. gibsoni acutely infected dogs.

Academic Significance and Societal Importance of the Research Achievements

本症の主症状である血小板減少症についてあまり研究されておらず、機序は不明である。本症の血小板病態の全体像を掴むことで、新たな病態や血小板感染防御の発見に加え、本症や他の血小板減少症を発生させる感染症の研究・制圧においても大きな意義を果たすと考えられる。本研究から血小板貪食機構が関与する可能性が示唆され、それを惹起する原虫由来タンパク質の同定を進めることで、ワクチン開発や創薬分野へ寄与できる。

Report

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

    (5 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (2 results)

  • [Journal Article] Characterization of a novel nicotinamide adenine dinucleotide-cytochrome b5 reductase mutation associated with canine hereditary methemoglobinemia2021

    • Author(s)
      Yayoi OTSUKA-YAMASAKI, Osamu INANAMI, Haruka SHINO, Reeko SATO, Masahiro YAMASAKI
    • Journal Title

      Journal of Veterinary Medical Science

      Volume: 83 Issue: 2 Pages: 315-321

    • DOI

      10.1292/jvms.20-0390

    • NAID

      130007994993

    • ISSN
      0916-7250, 1347-7439
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Retrospective study on intercurrent pancreatitis with <i>Babesia gibsoni</i> infection in dogs2019

    • Author(s)
      MASUDA Misa、OTSUKA-YAMASAKI Yayoi、SHIRANAGA Nobuyuki、IGUCHI Aiko、UCHIDA Naohiro、SATO Reeko、YAMASAKI Masahiro
    • Journal Title

      Journal of Veterinary Medical Science

      Volume: 81 Issue: 11 Pages: 1558-1563

    • DOI

      10.1292/jvms.19-0280

    • NAID

      130007744340

    • ISSN
      0916-7250, 1347-7439
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Epidemiological evaluation of cats associated with feline polycystic kidney disease caused by the feline <i>PKD1</i> genetic mutation in Japan2019

    • Author(s)
      Reeko SATO, Naohiro UCHIDA, Yuka KAWANA, Minako TOZUKA, Saori KOBAYASHI, Nana HANYU, Yoshinobu KONNO, Aiko IGUCHI, Yayoi YAMASAKI, Konomi KURAMOCHI, Masahiro YAMASAKI
    • Journal Title

      Journal of Veterinary Medical Science

      Volume: 81 Issue: 7 Pages: 1006-1011

    • DOI

      10.1292/jvms.18-0309

    • NAID

      130007680246

    • ISSN
      0916-7250, 1347-7439
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ポメラニアン犬で見つかったNADHメトヘモグロビン還元酵素欠損症原因タンパク質b5R-I194Lの解析2020

    • Author(s)
      山﨑(大塚)弥生、稲波 修、篠 春香、佐藤れえ子、山﨑真大
    • Organizer
      第16回獣医内科学アカデミー
    • Related Report
      2019 Research-status Report
  • [Presentation] ネコpolycystin-1遺伝子(PKD1)の遺伝子多型と腎嚢胞形成の関連性2019

    • Author(s)
      小林 沙織、山﨑弥生、内田 直宏、佐藤 れえ子
    • Organizer
      第62回日本腎臓学会学術総会
    • Related Report
      2019 Research-status Report

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

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