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Oral inflammation induces Parkinson disease via production of oxidized synuclein

Research Project

Project/Area Number 21K07402
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52010:General internal medicine-related
Research InstitutionAichi Gakuin University

Principal Investigator

Maruyama Wakako  愛知学院大学, 健康科学部, 教授 (20333396)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsパーキンソン病 / 口腔炎症 / 酸化ストレス / ミエロペルオキシダーゼ / 口腔内炎症 / 構造異常アルファシヌクレイン / 脂質過酸化 / アルファシヌクレイン
Outline of Research at the Start

消化管に分布する自律神経終末で生成された構造異常alpha-synuclein (Syn)が逆行性に中枢神経に伝播し、パーキンソン病を惹起する可能性がある。口腔は消化管の中で最も吻側に位置する。唾液腺に分布する迷走神経にSynの蓄積が認められること、唾液中にSynが存在することが報告され、口腔病変がパーキンソン病発症に先行する可能性が示唆されている。本研究課題では、「パーキンソン病患者では腸管内慢性炎症が酸化ストレスを増加させ、その結果生成された毒性をもつ Syn が中枢神経に逆行性輸送されることでパーキンソン病を発症させる 」との仮説を検証する。

Outline of Final Research Achievements

It was suggested that toxic alpha-synuclein (aSyn) oligomer synthesized in the enteric nervous system was transported into the brain to cause neurodegeneration in Parkinson disease (PD). Oral cavity is the most rostral part of gastrointestinal tract but little is known about the role of oral inflammation and oxidative stress in the synthesis of PD causative toxic aSyn. Human saliva obtained from elderly facility residents, and outpatients with PD and control was analyzed. The activity of myeloperoxidase (MPO), the enzyme produced and released from activated neutrophils was found to be a sensitive biomarker for early oral inflammation, and the activity was significantly increased in PD patient compared to the control. The mechanism of the increased MPO activity was studied. It was found that increased MPO activity was not due to the increased protein level, but there exists an intrinsic factor which regulates the enzyme activity.

Academic Significance and Societal Importance of the Research Achievements

本課題では、パーキンソン病 (PD)における口腔炎症の役割を明らかとするため研究を行った。口腔炎症を客観的定量的に評価するバイオマーカーは未だ確立していないが、活性化好中球から分泌される酵素であるmyeloperoxidase (MPO)活性が歯周病の早期像である歯肉炎患者の唾液で有意に増加し、病勢の進行と共に低下することを見出した。MPOは早期口腔炎症の生化学的マーカーとして有用である可能性がある。MPOはPD唾液で増加しており、クロロラジカルを生成を介して酸化ストレスによる組織傷害を起こす。MPO活性の制御機構について今後の研究が必要である。

Report

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

    (20 results)

All 2024 2023 2022 2021

All Journal Article (10 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (10 results) (of which Int'l Joint Research: 3 results,  Invited: 6 results)

  • [Journal Article] Toxic interactions between dopamine, α-synuclein, monoamine oxidase, and genes in mitochondria of Parkinson’s disease2024

    • Author(s)
      Naoi Makoto、Maruyama Wakako、Shamoto-Nagai Masayo、Riederer Peter
    • Journal Title

      Journal of Neural Transmission

      Volume: in press Issue: 6 Pages: 639-661

    • DOI

      10.1007/s00702-023-02730-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 高齢者のフレイルと認知症に関する最近の話題2024

    • Author(s)
      丸山和佳子
    • Journal Title

      全国歯科衛生士教育協議会雑誌

      Volume: 28 Pages: 3-6

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Neuroprotective Function of Rasagiline and Selegiline, Inhibitors of Type B Monoamine Oxidase, and Role of Monoamine Oxidases in Synucleinopathies2022

    • Author(s)
      Naoi Makoto、Maruyama Wakako、Shamoto-Nagai Masayo
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 23 Issue: 19 Pages: 11059-11059

    • DOI

      10.3390/ijms231911059

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Phytochemical in synucleinopathies: Targeting mitochondrial dysfunction and a-synuclein toxicity.2022

    • Author(s)
      Naoi M, Maruyama M, Shamoto-Nagai M
    • Journal Title

      Studies in Natural Product Chemistry

      Volume: -

    • Related Report
      2022 Research-status Report
  • [Journal Article] N-Methyl-(R)salsolinol and enzymes involved in enantioselective biosynthesis, bioactivation, and toxicity in Parkinson’s disease.2022

    • Author(s)
      Naoi M, Maruyama W
    • Journal Title

      Handbook of Neurotoxicology

      Volume: - Pages: 1573-1592

    • Related Report
      2022 Research-status Report
  • [Journal Article] Parkinsonian toxins: From MPTP to endogenous neurotoxin2022

    • Author(s)
      Naoi M, Maruyama M, Shamoto-Nagai M
    • Journal Title

      NeuroPsyvhopharmacology

      Volume: -

    • Related Report
      2022 Research-status Report
  • [Journal Article] Ginseng and ginsenosides in depression.2022

    • Author(s)
      Naoi M, Maruyama M, Shamoto-Nagai M
    • Journal Title

      NeuroPsyvhopharmacology

      Volume: -

    • Related Report
      2022 Research-status Report
  • [Journal Article] Disease-modifying treatment of Parkinson’s disease by phytochemicals: targeting multiple pathogenic factors2021

    • Author(s)
      Naoi Makoto、Maruyama Wakako、Shamoto-Nagai Masayo
    • Journal Title

      Journal of Neural Transmission

      Volume: - Issue: 5-6 Pages: 737-753

    • DOI

      10.1007/s00702-021-02427-8

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] TCM substances in Neuropsychopharmaco-therapy: Basic Aspects with a focus on depression.2021

    • Author(s)
      Naoi M, Maruyama W, Riederer P.
    • Journal Title

      NeuroPsychopharmacology

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nutrition in Brain Ageing; Its relevance to Age-associated Neurodegeneration.2021

    • Author(s)
      Maruyama W, Shamoto-Nagai M, Naoi M.
    • Journal Title

      NeuroPsychopharmacology

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 認知症予防のための栄養学的介入の試み2024

    • Author(s)
      丸山和佳子
    • Organizer
      神経科学研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 高齢者のフレイルと認知症に関する最近の話題2023

    • Author(s)
      丸山和佳子
    • Organizer
      全国歯科衛生士教育協議会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 口腔内炎症のパーキンソン病発症に及ぼす影響2023

    • Author(s)
      永井雅代、平山正昭、直井信、丸山和佳子
    • Organizer
      日本神経化学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Neurotrophic function of phytochemicals in synucleinopathies2022

    • Author(s)
      Makoto Naoi and Wakako Maruyama
    • Organizer
      Clinical Neurochemistry
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Traditional Japanese medicine in anxiety and depression2022

    • Author(s)
      Makoto Naoi, Wakako Maruyama and Masayo Shamoto-Nagai
    • Organizer
      World Association for Stress Related and Anxiety Disorders
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 緑茶カテキンによる唾液中myeloperoxidaseの阻害機構(2-II-15)2022

    • Author(s)
      永井雅代、直井信、丸山和佳子
    • Organizer
      第74回日本ビタミン学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 老化に関する最近の話題2022

    • Author(s)
      丸山和佳子
    • Organizer
      第19回高付加価値食品開発のためのフォーラム (日本食品・機械研究会)
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 健康寿命を伸ばす栄養のヒント2022

    • Author(s)
      丸山和佳子
    • Organizer
      なごや健康カレッジ
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 神経変性疾患に対する栄養学的先制医療の可能性について2022

    • Author(s)
      丸山和佳子
    • Organizer
      第19回 神経科学研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] Traditional Japanese Medicine, Kampo, in anxiety and depression.2021

    • Author(s)
      Naoi M, Maruyama W, Shamoto-Nagai M.
    • Organizer
      The 3rd International Congress of the World Association for Stress Related and Anxiety Disorders (WASAD)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited

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

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