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Development of novel therapies based on the DNA sequence of Cnm-positive S. mutans.

Research Project

Project/Area Number 21K16944
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57020:Oral pathobiological science-related
Research InstitutionNational Cardiovascular Center Research Institute

Principal Investigator

Saito Satoshi  国立研究開発法人国立循環器病研究センター, 病院, 医長 (40732996)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsう蝕 / 脳小血管病 / 認知症 / 脳卒中 / 脳出血 / 微小出血 / 治療 / 齲蝕原性細菌
Outline of Research at the Start

齲蝕原性細菌であるStreptococcus mutansは, 脳卒中や認知症との関連で近年大きな注目を集めている. S. mutansは通常, 軟組織には結合し得ない. しかし, Cnmタンパクを発現するS. mutansは, 象牙質を構成する1型コラーゲンや血管中膜の基底膜を構成する4型コラーゲンへの結合能を有する. 申請者らは, このCnm陽性S. mutansの口腔内感染が, 脳深部の微小出血発症の重大なリスクとなることを世界に先駆けて示してきた (Stroke 2020). 本研究課題では, ゲノムに注目し, Cnm陽性S. mutansに対する治療薬の開発を目指す.

Outline of Final Research Achievements

We previously reported a high prevalence of intracerebral hemorrhage in individuals harboring Streptococcus mutans expressing Cnm, a collagen-binding protein found in the oral cavity. S.mutans is a major pathogen responsible for dental caries.
In this project, we have achieved the following three main outcomes: (1)Demonstrated the association between Cnm-positive S. mutans and cerebral microbleeds not only in the deep area, but also in the lobar area. (2)Successfully completed patient enrollment in the multi-center prospective RAMESSES study, aiming to compare stroke patients with Cnm-positive S. mutans to those without. (3)Identified the B-repeat sequence of Cnm-positive S. mutans as crucial for binding to the vascular basement membrane.

Academic Significance and Societal Importance of the Research Achievements

疫学研究では古くから歯科疾患と脳神経疾患との関係が報告されているが, これまではその具体的な病態生理に関する理解が不十分であったこともあり, 歯科-医科の連携はあまり注目されてこなかった. しかし本研究代表者らは, Cnm陽性S. mutansの口腔内感染が脳微小出血と密接に関連することを見出し, 歯科疾患と脳神経疾患との関係の一端を明らかにした. これまでの実験結果を元にした計算では, Cnm陽性S. mutansへの治療介入が実現した場合, 3万人/年の脳微小出血が予防可能と推定される. 症候性脳出血の発症に関しても, 約20%程度抑制できる可能性があり, 本研究の将来性は非常に大きい.

Report

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

    (13 results)

All 2024 2023 2022 2021

All Journal Article (9 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 6 results) Presentation (4 results) (of which Invited: 4 results)

  • [Journal Article] Editorial: Pathological implications of metabolic and cerebrovascular diseases in neurocognitive disorders2024

    • Author(s)
      Saito Satoshi、Hase Yoshiki、Tanaka Masashi
    • Journal Title

      Frontiers in Endocrinology

      Volume: 15 Pages: 1367575-1367575

    • DOI

      10.3389/fendo.2024.1367575

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Efficacy and safety of cilostazol in mild cognitive impairment: a randomized clinical trial2023

    • Author(s)
      Saito S, Oishi N, et al (他35名、25番目)
    • Journal Title

      JAMA Network Open

      Volume: 6 Issue: 12 Pages: e2344938-e2344938

    • DOI

      10.1001/jamanetworkopen.2023.44938

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Harboring Cnm‐expressing <i>Streptococcus mutans</i> in the oral cavity relates to both deep and lobar cerebral microbleeds2023

    • Author(s)
      Ikeda Shuhei、Saito Satoshi...
    • Journal Title

      European Journal of Neurology

      Volume: - Issue: 11 Pages: 3487-3496

    • DOI

      10.1111/ene.15720

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Plasma mid‐regional pro‐adrenomedullin: A biomarker of the ischemic penumbra in hyperacute stroke2023

    • Author(s)
      Ishiyama Hiroyuki、Tanaka Tomotaka、Saito Satoshi、Koyama Teruhide、Kitamura Akihiro、Inoue Manabu、Fukushima Naoya、Morita Yoshiaki、Koga Masatoshi、Toyoda Kazunori、Kuriyama Nagato、Urushitani Makoto、Ihara Masafumi
    • Journal Title

      Brain Pathology

      Volume: 33 Issue: 2

    • DOI

      10.1111/bpa.13110

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Risk Assessment of Cnm-Positive Streptococcus mutans in Stroke Survivors (RAMESSES): Protocol for a Multicenter Prospective Cohort Study2022

    • Author(s)
      Hosoki Satoshi、Hattori Yorito、Saito Satoshi、Takegami Misa、Tonomura Shuichi、Yamamoto Yumi、Ikeda Shuhei、Hosomi Naohisa、Oishi Naoya、Morita Yoshiaki、Miyamoto Yoshihiro、Nomura Ryota、Nakano Kazuhiko、Ihara Masafumi
    • Journal Title

      Frontiers in Neurology

      Volume: 13 Pages: 816147-816147

    • DOI

      10.3389/fneur.2022.816147

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complement 3 Is a Potential Biomarker for Cerebral Amyloid Angiopathy2022

    • Author(s)
      Saito Satoshi、Yamashiro Takayuki、Yamauchi Miho、Yamamoto Yumi、Noguchi Michio、Tomita Tsutomu、Kawakami Daisuke、Shikata Masamitsu、Tanaka Tomotaka、Ihara Masafumi
    • Journal Title

      Journal of Alzheimer's Disease

      Volume: 89 Issue: 1 Pages: 381-387

    • DOI

      10.3233/jad-220494

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Amyloid-β: Structure, Function, and Pathophysiological Significance in Neurodegenerative Diseases2022

    • Author(s)
      Saito Satoshi、Ono Kenjiro、Tanaka Masashi
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 23 Issue: 18 Pages: 10275-10275

    • DOI

      10.3390/ijms231810275

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Association Between Cerebral Microbleeds and Circulating Levels of Mid-Regional Pro-Adrenomedullin2022

    • Author(s)
      Kuriyama Nagato、Koyama Teruhide、Ozaki Etsuko、Saito Satoshi...
    • Journal Title

      Journal of Alzheimer's Disease

      Volume: 88 Issue: 2 Pages: 731-741

    • DOI

      10.3233/jad-220195

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 口腔内細菌が関わる脳卒中の特徴や機序は?2021

    • Author(s)
      齊藤聡
    • Journal Title

      日本医事新報

      Volume: 5085 Pages: 50-50

    • Related Report
      2021 Research-status Report
  • [Presentation] 脳アミロイド血管症の成因と治療戦略2023

    • Author(s)
      齊藤聡 猪原匡史
    • Organizer
      第48回日本脳卒中学会総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 脳アミロイド血管症の成因と治療戦略2023

    • Author(s)
      齊藤聡 猪原匡史
    • Organizer
      STROKE 2023
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 脳アミロイド血管症の治療戦略2022

    • Author(s)
      齊藤聡 猪原匡史
    • Organizer
      第12回日本脳血管・認知症学会総会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 動脈硬化と脳アミロイド血管症の最前線2022

    • Author(s)
      齊藤聡 猪原匡史
    • Organizer
      第22回日本抗加齢医学会総会
    • Related Report
      2022 Research-status Report
    • Invited

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

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