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Understanding of disrupted oral mirobiota colonized by non-oral taxa and its association with host's health conditions

Research Project

Project/Area Number 21K19606
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 57:Oral science and related fields
Research InstitutionKyushu University

Principal Investigator

Takeshita Toru  九州大学, 歯学研究院, 教授 (50546471)

Co-Investigator(Kenkyū-buntansha) 森 康雄  九州大学, 大学病院, 助教 (90573345)
奥 菜央理  九州大学, 歯学研究院, 助教 (60898972)
古田 美智子  九州大学, 歯学研究院, 准教授 (20509591)
Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords口腔常在微生物叢 / 16S rRNA / 舌苔 / 異常定着
Outline of Research at the Start

本研究では造血細胞移植患者と重度要介護高齢者の口腔常在微生物叢に関する調査を行うことで、外部から侵入する微生物に対するバリアとして機能している常在微生物叢が破綻した口腔に定着する微生物種を網羅的に把握し、予後への影響の解明を目指す。本研究により感染管理において見過ごされてきた崩壊した口腔微生物叢という潜在的感染源の詳細が明らかになるとともに、有病者や脆弱高齢者において原因不明とみなされてきた予後不良に関与する微生物の発見も期待できる。

Outline of Final Research Achievements

This study revealed details of compositional shift in oral indigenous microbiota of allogeneic hematopoietic stem cell transplantation patients. We also identified non-oral bacterial taxa colonizing disrupted oral microbiota in frail elderly adults and an association between their colonization and the hosts’health status. These results suggest that oral cavity could be a reservoir of unexpected bacterial taxa in compromised patients and frail elderly adults.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は全身状態の悪化した者において口腔が病原微生物のリザーバーとなっている事例を示すともに、感染防御における正常口腔常在微生物叢の重要性を示すものである。今後口腔常在微生物叢を正常に保つ手法を確立できれば口腔微生物叢のモニタリングと積極的介入に基づく新しい感染防御システムの構築に繋がっていく可能性が期待できる。

Report

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

    (7 results)

All 2024 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (5 results) (of which Invited: 3 results)

  • [Journal Article] Oral-to-rectum microbial transmission in orthopedic patients without a history of intestinal disorders2024

    • Author(s)
      Ge Lin, Shinya Kageyama, Aiko Maeda, Eiji Sakamoto, Jiale Ma, Mikari Asakawa, Michiko Furuta, Yoshihisa Yamashita, Toru Takeshita
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 14 Pages: 1358684-1358684

    • DOI

      10.3389/fcimb.2024.1358684

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Establishment of tongue microbiota by 18 months of age and determinants of its microbial profile2023

    • Author(s)
      Kageyama Shinya、Ma Jiale、Furuta Michiko、Takeshita Toru、Asakawa Mikari、Okabe Yuka、Yamashita Yoshihisa
    • Journal Title

      mBio

      Volume: 14 Issue: 5

    • DOI

      10.1128/mbio.01337-23

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 造血細胞移植に伴う口腔常在細菌叢の細菌構成の変化2024

    • Author(s)
      奥菜央理
    • Organizer
      日本造血・免疫細胞療法学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Relationship between tongue microbiota composition of elderly adultss and tooth loss2023

    • Author(s)
      朝川未加李、竹下徹、影山伸哉、古田美智子、山下喜久
    • Organizer
      第96回日本細菌学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 口腔と全身の健康増進に向けた正常な口腔常在微生物叢の理解2022

    • Author(s)
      竹下徹
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 舌苔微生物叢の正常像と健康との関連2021

    • Author(s)
      竹下徹
    • Organizer
      第91回日本感染症学会西日本地方会学術集会・第64回日本感染症学会中日本地方会学術集会・第69回日本化学療法学会西日本支部総会 合同学会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 口腔常在微生物叢の正常像と健康に関わる異常2021

    • Author(s)
      竹下徹
    • Organizer
      第74回日本細菌学会中国・四国支部総会
    • Related Report
      2021 Research-status Report
    • Invited

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Published: 2021-07-13   Modified: 2025-01-30  

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