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A study of association between enteric bacteria markers and patients with synucleinopathy

Research Project

Project/Area Number 16K09711
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Neurology
Research InstitutionNiigata University

Principal Investigator

Ozawa Tetsutaro  新潟大学, 医歯学総合病院, 特任教授 (10377153)

Research Collaborator NISHIZAWA masatoyo  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsシヌクレイノパチー / パーキンソン病 / 嗅覚低下 / 口腔微生物 / 腸内細菌 / 硫化水素 / 自律神経障害 / 環境因子 / 嗅覚障害 / 呼気ガス分析
Outline of Final Research Achievements

The aim of this study was to determine whether olfactory disturbance and gastrointestinal symptoms of early stage of Parkinson's disease (PD) were associated with metabolites from enterobacterial flora including oral bacteria. Thirty-five patients with early stage of PD and fourteen age-matched control subjects who had no neurodegenerative diseases were participated in this study. The olfactory disturbance and gastrointestinal symptoms in PD patients were more severe than those in controls. Rate of Helicobacter pylori infection was not different between the two groups. The severity of gastrointestinal symptom was not correlated with breath concentration of hydrogen sulfide that was produced by oral bacteria. In early stage of PD, the severity of olfactory disturbance was significantly correlated with the breath concentration of hydrogen sulfide. Our results suggest that pathogenic mechanism of olfactory disturbance in PD patients is associated with metabolites from oral bacteria.

Academic Significance and Societal Importance of the Research Achievements

パーキンソン病の前駆症状として、嗅覚低下と便秘を含めた消化管機能障害が知られている。本研究では、パーキンソン病の嗅覚低下に口腔微生物により産生された硫化水素がPDの嗅神経障害に関与している可能性が示唆された。硫化水素は高濃度であれば短時間で嗅神経を障害することが知られている。本研究で検出した口腔内の硫化水素は低濃度ではあるが、硫化水素を発する口腔微生物の生息は患者の生活史の大部分におよぶ可能性があり、患者の嗅神経は低濃度硫化水素に長期間曝露された可能性がある。今後は嗅神経における低濃度硫化水素の長期曝露の影響をさらに検討する必要がある。

Report

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

    (9 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results) Book (2 results)

  • [Journal Article] 消化器と自律神経 神経変性疾患の自律神経障害における消化管ホルモン2018

    • Author(s)
      小澤鉄太郎
    • Journal Title

      自律神経

      Volume: 55 Pages: 292-294

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Multiple system atrophy: clinicopathological characteristics in Japanese patients2017

    • Author(s)
      Ozawa T and Onodera O
    • Journal Title

      Proceedings of the Japan Academy, Series B

      Volume: 93 Issue: 5 Pages: 251-258

    • DOI

      10.2183/pjab.93.016

    • NAID

      130006770760

    • ISSN
      0386-2208, 1349-2896
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 自律神経障害と消化管ホルモン2017

    • Author(s)
      小澤鉄太郎
    • Journal Title

      自律神経

      Volume: 54 Pages: 276-278

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 神経変性疾患の自律神経障害における消化管ホルモン2018

    • Author(s)
      小澤鉄太郎
    • Organizer
      第71回日本自律神経学会総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Spectrum of the autonomic nervous system degeneration in multiple system atrophy2017

    • Author(s)
      Tetsutaro Ozawa
    • Organizer
      The International Society for Autonomic Neuroscience 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Gastrointestinal hormones in neurodegenerative autonomic disorders2017

    • Author(s)
      小澤鉄太郎
    • Organizer
      第70回日本自律神経学会総会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 自律神経障害と消化管ホルモン2016

    • Author(s)
      小澤 鉄太郎
    • Organizer
      第69回日本自律神経学会総会
    • Place of Presentation
      熊本県民交流館パレアホール(熊本県熊本市)
    • Year and Date
      2016-11-10
    • Related Report
      2016 Research-status Report
    • Invited
  • [Book] 神経・精神疾患による消化管障害ベッドサイドマニュアル 脳性麻痺と消化器障害、帯状疱疹・単純性疱疹2019

    • Author(s)
      小澤鉄太郎
    • Total Pages
      379
    • Publisher
      中外医学社
    • ISBN
      9784498140486
    • Related Report
      2018 Annual Research Report
  • [Book] 今日の治療指針2018 15神経・筋疾患 自律神経障害(多系統萎縮症を含む)2018

    • Author(s)
      小澤鉄太郎
    • Total Pages
      2066
    • Publisher
      医学書院
    • ISBN
      9784260032346
    • Related Report
      2018 Annual Research Report

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Published: 2016-04-21   Modified: 2020-03-30  

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