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Elucidating the Role of Gut Microbiota in the Pathogenesis of Parkinson's Disease

Research Project

Project/Area Number 22K15394
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49010:Pathological biochemistry-related
Research InstitutionNagoya University

Principal Investigator

Hamaguchi Tomonari  名古屋大学, 医学系研究科, 特任助教 (90812149)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords腸内細菌 / パーキンソン病 / 短鎖脂肪酸 / モデルマウス研究 / 腸内細菌叢 / モデルマウス / ノトバイオート / 便秘 / GLP-1 / GPCR
Outline of Research at the Start

パーキンソン病は、中脳黒質ドパミン神経細胞への Lewy小体(α-synuclein異常蓄積)出現 を特徴とする加齢とともに増加する神経変性疾患であり、2030年には世界で1000万人の罹患数に到達すると推定される。近年、パーキンソン病の少なくとも半数は腸管発症であることが高いレベルのエビデンスで明らかにされつつある。しかし、今日まで特定の腸内細菌による病態への影響を調べるモデルマウス研究は殆ど存在しない。本件研究はパーキンソン病における腸内細菌叢の役割を明らかにして、パ ーキンソン病の発症および進行要因に迫る。

Outline of Final Research Achievements

We hypothesize that specific gut bacteria are involved in the onset and pathogenesis of Parkinson's Disease (PD). One objective of this project is to identify the gut bacteria involved in the onset and progression of PD. The second is to elucidate the role of short-chain fatty acids (SCFAs) in PD. For Objective 1, we created a co-transplantation model of A. muciniphila and Bacteroides spp. and experimentally reproduced chronic constipation, an early symptom of PD. For Objective 2, we observed an exacerbation of PD symptoms by cross-breeding a short-chain fatty acid receptor knockout model with a PD mouse model. Thus, through mouse model studies, it has been demonstrated that gut bacteria are involved in the symptoms of PD.

Academic Significance and Societal Importance of the Research Achievements

これまで世界各地での研究により、パーキンソン病(PD)患者の腸内細菌叢とPDの病態との間に相関が見られることが明らかになっていた。しかし、これらの相関関係から直接的な因果関係を特定するには至っていない。本研究では、モデルマウスを使用してPDに特有の腸内細菌がPDの初期症状である便秘を再現することを検証しました。さらに、腸内細菌叢が産生する短鎖脂肪酸が病態の進行をどのように抑制するかも明らかにしました。本研究にて、PDは腸脳相関が破綻することに伴う病気であることを示すことができた。

Report

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

    (8 results)

All 2024 2023 2022

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Gastrointestinal disorders in Parkinson's disease and other Lewy body diseases2023

    • Author(s)
      Masaaki Hirayama, Hiroshi Nishiwaki, Tomonari Hamaguchi, Kinji Ohno
    • Journal Title

      npj Parkinson's Disease

      Volume: 9 Issue: 1

    • DOI

      10.1038/s41531-023-00511-2

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fusobacterium infection facilitates the development of endometriosis through the phenotypic transition of endometrial fibroblasts.2023

    • Author(s)
      Muraoka Ayako、Suzuki Miho、Hamaguchi Tomonari、Watanabe Shinya、Iijima Kenta、Murofushi Yoshiteru、Shinjo Keiko、Osuka Satoko、Hariyama Yumi、Ito Mikako、Ohno Kinji、Kiyono Tohru、Kyo Satoru、Iwase Akira、Kikkawa Fumitaka、Kajiyama Hiroaki、Kondo Yutaka.
    • Journal Title

      Science Translational Medicine

      Volume: 15 Issue: 700 Pages: 700-700

    • DOI

      10.1126/scitranslmed.add1531

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Gut microbiota in dementia with Lewy bodies2022

    • Author(s)
      Nishiwaki Hiroshi、Ueyama Jun、Kashihara Kenichi、Ito Mikako、Hamaguchi Tomonari、Maeda Tetsuya、Tsuboi Yoshio、Katsuno Masahisa、Hirayama Masaaki、Ohno Kinji
    • Journal Title

      npj Parkinson's Disease

      Volume: 8 Issue: 1 Pages: 169-169

    • DOI

      10.1038/s41531-022-00428-2

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Short chain fatty acids-producing and mucin-degrading intestinal bacteria predict the progression of early Parkinson’s disease2022

    • Author(s)
      Nishiwaki Hiroshi、Ito Mikako、Hamaguchi Tomonari、Maeda Tetsuya、Kashihara Kenichi、Tsuboi Yoshio、Ueyama Jun、Yoshida Takumi、Hanada Hiroyuki、Takeuchi Ichiro、Katsuno Masahisa、Hirayama Masaaki、Ohno Kinji
    • Journal Title

      npj Parkinson's Disease

      Volume: 8 Issue: 1 Pages: 65-65

    • DOI

      10.1038/s41531-022-00328-5

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Examination of Abnormal Alpha-synuclein Aggregates in the Enteric Neural Plexus in Patients with Ulcerative Colitis2022

    • Author(s)
      Gibo Noriaki、Hamaguchi Tomonari、Miki Yasuo、Yamamura Takeshi、Nakaguro Masato、Ito Mikako、Nakamuara Masanao、Kawashima Hiroki、Hirayama Masaaki、Hirooka Yoshiki、Wakabayashi Koichi、Ohno Kinji
    • Journal Title

      Journal of Gastrointestinal and Liver Diseases

      Volume: 31 Issue: 3 Pages: 290-300

    • DOI

      10.15403/jgld-4313

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] PARKINSON'S DISEASE SPECIFIC MICROBIOTA INDUCES CONSTIPATION IN MICE2024

    • Author(s)
      Tomonari Hamaguchi, Noriaki Gibo, Hiroshi Nishiwaki, Mikako Ito, Masaaki Hirayama, Kinji Ohno
    • Organizer
      10th International Human Microbiome Consortium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 腸内細菌は便秘症を誘発する。2023

    • Author(s)
      浜口知成、宜保憲明、西脇寛、伊藤美佳子、平山正昭、大野欽司
    • Organizer
      日本細菌学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] パーキンソン病患者便から単離した4種類の新規候補細菌2023

    • Author(s)
      関口恭平、浜口知成、伊藤美佳子、西脇寛、上山純、大野欽司、平山正昭
    • Organizer
      日本細菌学会総会
    • Related Report
      2022 Research-status Report

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Published: 2022-04-19   Modified: 2025-01-30  

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