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Comprehensive analysis of the fluoride-effects on the metabolic mechanism of oral Actinomyces

Research Project

Project/Area Number 16K20447
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Conservative dentistry
Research InstitutionTohoku University

Principal Investigator

Kawashima Junko  東北大学, 東北メディカル・メガバンク機構, 助教 (50633707)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsStoreptococcus / 酸産生 / フッ化物 / Actinomyces / Bifidobacterium / Streptococcus / 紺面齲蝕 / 糖代謝 / 重炭酸 / 根面齲蝕 / 歯学 / 微生物学
Outline of Final Research Achievements

Dental-caries is caused by the acid produced by plaque-forming bacteria. Fluoride is widely used to prevent caries in various ways around the world. It has been reported that fluoride inhibits the acid production and growth of most oral bacteria, such as oral Streptococcus and Actinomyces. In this study we focused on the caries-associated bacteria, Actinomyces, Streptococcus and Bifidobacterium and examined their acid-producing activity and the suppression of carbohydrate metabolism by fluoride, while considering the physiological conditions of the oral cavity. Our result suggests that Bifidobacterium, which is an acetate-producing bacterium, might induce and promote dental caries through a different mechanism from lactate-producing bacteria.

Academic Significance and Societal Importance of the Research Achievements

本研究では、齲蝕や白斑病変から検出されるBifidobacteriumが酸産生およびフッ化物耐性を持つことを明らかにした。Bifidobacteriumの高いフッ化物耐性は、ビフィドシャントと呼ばれる特殊な代謝経路に起因することが考えられ、この経路により産生される酢酸は弱酸ではあるが、乳酸産生細菌による齲蝕発生メカニズムとは異なる。 酸産生を行う口腔内細菌は齲蝕に関連すると考えられているが、菌種により産生する酸もその代謝経路も異なる。今回検討した菌は、フッ化物による酸産生阻害が確認されたがその効果は一様ではなく、効率的な齲蝕予防の観点からライフステージに合わせた対策が必要であると考えらる。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (5 results)

All 2019 2018 Other

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

  • [Journal Article] Acidogenic Potential of Oral Bifidobacterium and Its High Fluoride Tolerance2019

    • Author(s)
      Manome Ayumi、Abiko Yuki、Kawashima Junko、Washio Jumpei、Fukumoto Satoshi、Takahashi Nobuhiro
    • Journal Title

      Frontiers in Microbiology

      Volume: 10 Pages: 1-10

    • DOI

      10.3389/fmicb.2019.01099

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] フッ化物による歯周病関連菌 Porphyromonas gingivalis の増殖・代謝の抑制効果2019

    • Author(s)
      土門ひと美,鷲尾 純平,安彦 友希,川嶋 順子,高橋 信博
    • Organizer
      第61回歯科基礎医学会学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Dental caries-associated glucose metabolism of oral Bifidobacterium2018

    • Author(s)
      Yuki Abiko, Atsunobu Sugahara, Kazuhiro Murakami, Junko Kawashima, Nobuhiro Takahashi
    • Organizer
      The 13th International Workshop on Biomaterials in Interface Science
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Remarks] 新たなう蝕関連細菌ビフィドバクテリウム菌の 糖代謝機構の解明

    • URL

      http://www.dent.tohoku.ac.jp/news/view.html#!507

    • Related Report
      2019 Annual Research Report
  • [Remarks] 川嶋助教らが執筆したビフィドバクテリウム菌のう蝕誘発機能についての論文が国際学術誌に掲載されました

    • URL

      https://www.megabank.tohoku.ac.jp/news/33886

    • Related Report
      2019 Annual Research Report

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Published: 2016-04-21   Modified: 2021-02-19  

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