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Adsorption and removal of O157 Shiga toxin by indigestible food ingredients

Research Project

Project/Area Number 21K02092
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 08030:Family and consumer sciences, and culture and living-related
Research InstitutionThe University of Tokushima

Principal Investigator

KANEMARU Kaori  徳島大学, 大学院社会産業理工学研究部(生物資源産業学域), 教授 (00243676)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords志賀毒素 / 吸着 / 難消化性成分 / O157
Outline of Research at the Start

腸管出血性大腸菌が産生する志賀毒素(Stx)を食品由来の難消化性成分により吸着除去できれば、感染予防、病態改善が期待できる。しかし志賀毒素吸着が可能な食品は我々が報告した納豆のポリグルタミン酸(PGA)とウスバアオノリのラムナン硫酸以外にはあまり見出されていない。本研究はStxを吸着除去する難消化性食品成分を見出し、その吸着除去能を明らかにすることを目的とする。PGAやラムナン硫酸の吸着能を増強する方法を検討すると共に、他の多様な食品群から新たに志賀毒素吸着性食品を探索する。志賀毒素吸着性食品から有効成分の単離同定・吸着部位の解析を試み、細胞モデルを用いて機能解析を行う。

Outline of Final Research Achievements

The adsorption capacities of non-digestible foods and non-digestible ingredients for Shiga toxin (Stx) produced by Shiga toxin-producing Escherichia coli O157 were investigated. As a result, we found that rhamnan sulfate from sujiaonori (Ulva prolifera), fucoidan from arame (Eisenia bicyclis), and chitosan (from crab) had remarkable Stx adsorption capacity. The adsorption of active ingredients and Stx prevented Stx binding to intestinal cell CACO-2, thus avoiding apoptosis-induced cell death. The adsorption capacities of rhamnan sulfate and fucoidan were attributed to the ratio of constituent sugars and the degree of high molecular weight, while the adsorption capacity of chitosan with amino groups was attributed to the degree of high molecular weight, and the number of amino groups may also play a significant role in their adsorption capacity.

Academic Significance and Societal Importance of the Research Achievements

本研究において吸着能を見出した難消化性食品は,常食摂取に対応する濃度範囲で吸着能を示しているため,安全かつ安価な吸着除去が期待できる。吸着能を有する食品の常食摂取による感染予防,有用な吸着能を有する加工食品の開発,吸着除去剤への応用開発などに繋がると考える。その結果,感染予防や病態改善が期待できると考える。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2024 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results)

  • [Journal Article] Characterization of uptake and metabolism of very long-chain fatty acids in peroxisome-deficient CHO cells2022

    • Author(s)
      Ali Hanif、Morito Katsuya、Hasi Rumana Yesmin、Aihara Mutsumi、Hayashi Junji、Kawakami Ryushi、Kanemaru Kaori、Tsuchiya Koichiro、Sango Kazunori、Tanaka Tamotsu
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids

      Volume: 1867 Issue: 2 Pages: 159088-159088

    • DOI

      10.1016/j.bbalip.2021.159088

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Continuous microwave-assisted step-by-step extraction of bioactive water-soluble materials and fucoidan from brown seaweed Undaria pinnatifida waste2022

    • Author(s)
      Sasaki Chizuru、Tamura Satoshi、Suzuki Miyuki、Etomi Kanako、Nii Nobuya、Hayashi Junji、Kanemaru Kaori
    • Journal Title

      Biomass Conversion and Biorefinery

      Volume: - Issue: 6 Pages: 7673-7682

    • DOI

      10.1007/s13399-022-03035-6

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] ピロリン-5-カルボン酸レダクターゼの触媒機構の解明2024

    • Author(s)
      伊澤命吹,林順司,川上竜巳,金丸芳,大島敏久,櫻庭春彦
    • Organizer
      日本農芸化学会中四国支部第67回講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 新規二機能型融合酵素ジアミノピメリン酸脱炭酸酵素/アスパラギン酸キナーゼに関する研究2024

    • Author(s)
      山田萌加,林順司,川上竜巳,金丸芳,大島敏久,櫻庭春彦
    • Organizer
      日本農芸化学会中四国支部第67回講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 超好熱アーキア由来FAD依存性D-乳酸脱水素酵素のX線結晶構造解析2023

    • Author(s)
      林順司,川上竜巳,平田章,金丸芳,大島敏久,櫻庭春彦
    • Organizer
      日本農芸化学会2023年度中四国・西日本支部合同大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] アラメ(Eisenia bicyclis)によるEHEC O157産生志賀毒素吸着2022

    • Author(s)
      山下晶央,山﨑義輝,佐々木千鶴, 林 順司,川上竜巳,金丸 芳
    • Organizer
      日本農芸化学会中四国支部第63回講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Uptake and metabolism of very-long-chain fatty acid in animal cells2021

    • Author(s)
      Hanif Ali, Katsuya Morito, Rumana Yesmin Hasi, Mutsumi Aihara, Junji Hayashi, Ryushi Kawakami, Kaori Kanemaru, Koichiro Tsuchiya and Tamotsu Tanaka
    • Organizer
      第63回日本脂質生化学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 徳島県の家庭料理 行事食の特徴 -ひな祭りの楽しい思い出-遊山箱―2021

    • Author(s)
      髙橋 啓子,三木 章江,宇野 美和子,川端 紗也花,後藤 月江,長尾 久美子,松下 純子,近藤 美樹,坂井 真奈美,金丸 芳
    • Organizer
      日本調理科学会2021年度大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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