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Effects of phage interactions on Shiga toxin production in enterohemorragic Escherichia coli

Research Project

Project/Area Number 18K15156
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49050:Bacteriology-related
Research InstitutionNational Institute of Infectious Diseases

Principal Investigator

Lee Ken-ichi  国立感染症研究所, 細菌第一部, 主任研究官 (80721711)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords腸管出血性大腸菌 / ゲノム解析 / ラムダ様ファージ / 志賀毒素 / 志賀毒素ファージ
Outline of Final Research Achievements

To elucidate the effect of Shiga toxin (Stx) phage and the related phages on the production of Stx in enterohemorrhagic Escherichia coli (EHEC), sequencing and related analyses were performed.
In the analyses of EHEC O157, deletion mutants of Stx or the related phages led to temporal change Stx production. Complete genome sequencing of EHEC O111, O86, and OX18 showed that there are various types of Stx phage in the same serotype, and the same phage was found among different serotypes.

Academic Significance and Societal Importance of the Research Achievements

腸管出血性大腸菌(EHEC)は、国内で年間3,000名以上の感染者が報告され、溶血性尿毒症症候群等の重症例では患者が死に至ることもある。同感染症の重症化には、志賀毒素(Stx)の産生が関与しており、同毒素のサブタイプや産生量が重要であると考えられる。しかし、Stxファージの多様性Stxファージの多様性やファージ間の作用については、不明な点が多い。本研究で明らかとなった知見は、今後同感染症の治療や予後予測に有用であると考えられる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2021 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Whole-Genome Sequencing of Shiga Toxin?Producing Escherichia coli OX18 from a Fatal Hemolytic Uremic Syndrome Case2021

    • Author(s)
      Lee Kenichi、Iguchi Atsushi、Uda Kazuhiro、Matsumura Sohshi、Miyairi Isao、Ishikura Kenji、Ohnishi Makoto、Seto Junji、Ishikawa Kanako、Konishi Noriko、Obata Hiromi、Furukawa Ichiro、Nagaoka Hiromi、Morinushi Hirotaka、Hama Natsuki、Nomoto Ryohei、Nakajima Hiroshi、Kariya Hideaki、Hamasaki Mitsuhiro、Iyoda Sunao
    • Journal Title

      Emerging Infectious Diseases

      Volume: 27 Issue: 5 Pages: 1509-1512

    • DOI

      10.3201/eid2705.204162

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Global distribution of epidemic-related Shiga toxin 2 encoding phages among enteroaggregative Escherichia coli2020

    • Author(s)
      Kimata Keiko、Lee Kenichi、Watahiki Masanori、Isobe Junko、Ohnishi Makoto、Iyoda Sunao
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 11738-11738

    • DOI

      10.1038/s41598-020-68462-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 小児重症例から分離された腸管出血性大腸菌新規血清群OX18および関連株のゲノム解析2021

    • Author(s)
      李 謙一, 井口 純, 宇田和宏, 松村壮史, 宮入烈, 石倉健司, 大西 真, 伊豫田淳, EHEC Working Group in Japan
    • Organizer
      第94回日本細菌学会総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 大規模集団感染由来O104:H4と同一のStx2aファージを有する志賀毒素産生性腸管凝集性大腸菌 (Stx-EAEC) O86の解析2020

    • Author(s)
      木全恵子, 李 謙一, 綿引正則, 磯部順子, 大西 真, 伊豫田 淳
    • Organizer
      第163回日本獣医学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 志賀毒素産生性腸管凝集性大腸菌 (Stx-EAEC) O86における集団感染由来O104:H4と同一のStx2aファージの獲得2019

    • Author(s)
      木全恵子, 李 謙一, 綿引正則, 磯部順子, 大西 真, 伊豫田 淳
    • Organizer
      第93回日本細菌学会総会
    • Related Report
      2019 Research-status Report
  • [Presentation] WGS解析によるMLVAの評価と効率的腸管出血性大腸菌 O157サーベイランス手法の確立2019

    • Author(s)
      李 謙一, 泉谷秀昌, 伊豫田 淳, 大西 真, EHEC Working Group
    • Organizer
      第92回日本細菌学会総会
    • Related Report
      2018 Research-status Report
  • [Presentation] Applicability of whole genome sequencing of enterohemorrhagic Escherichia coli O111 in the national surveillance2018

    • Author(s)
      Ken-ichi Lee Sunao Iyoda Tomoko Morita-Ishihara Keiko Kimata Masanori Watahiki Tsuyoshi Sekizuka Makoto Kuroda Makoto Ohnishi EHEC Working Group
    • Organizer
      The 10th International Symposium on Shiga Toxin (Verocytotoxin) Producing Escherichia coli Infections
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] HUS患者由来LEE非保有型EHECの完全長ゲノム配列解析2018

    • Author(s)
      李 謙一, 木全恵子, 綿引正則, 磯部 順子, 伊豫田 淳, 大西 真, EHEC Working Group
    • Organizer
      第22回腸管出血性大腸菌感染症研究会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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