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Clarifying the function of gut microbial message molecules and their association with cardiovascular diseases

Research Project

Project/Area Number 20H03676
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 53020:Cardiology-related
Research InstitutionKobe University

Principal Investigator

Hirata Ken-ichi  神戸大学, 医学研究科, 教授 (20283880)

Co-Investigator(Kenkyū-buntansha) 吉田 尚史  神戸大学, 医学研究科, 医学研究員 (00846321)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2020: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywords腸内細菌 / メッセージ物質 / 動脈硬化 / 炎症 / LPS / 外膜小胞 / 好中球細胞外トラップ / 循環器疾患 / OMV / リポポリサッカライド / マイクロRNA / リポ多糖
Outline of Research at the Start

研究代表者は、循環器疾患と腸内細菌叢との関連調査研究を行い、動脈硬化予防に関連する腸内細菌種を同定して、新規治療法の開発研究に繋げている。
本研究は、腸内細菌の中で特にグラム陰性桿菌由来の『リポ多糖(LPS)』と同菌が分泌する『外膜小胞(OMVs)』が持つ生体作用を解明し、疾患発症との関連を探究する事である。そのために、腸内細菌の①LPS と②OMVs を独自に単離し、その機能や体内動態を明らかとする。加えて、③腸管内のLPSやOMVsが遠隔臓器である心・血管に与える影響をマウスを用いて検証し、患者糞便を用いたトランスレーショナルリサーチに展開する礎となる研究を行う。

Outline of Final Research Achievements

We succeeded in isolating LPS and OMVs, which are message substances derived from gut bacteria. Both of them hardly migrated from the gut tract to the blood when administered orally or enterally to mice. The LPS activity of Bacteroides, which was identified as an atherosclerosis-preventing bacterium, was measured to be about 1/10 of that of Escherichia coli-derived LPS, indicating that it is very weakly inflammatory. We investigated the aggravating effect of intraperitoneal LPS administration on atherosclerosis in mice and clarified its mechanism. Neutrophil extracellular traps (NETs) at several days after the LPS injection and following macrophage chemokine production were observed in mouse atherosclerotic lesions. These are novel mechanisms that LPS activates inflammation and atherosclerosis.

Academic Significance and Societal Importance of the Research Achievements

腸内細菌が産生するメッセージ物質の生体への影響を検証することで、注目される腸内細菌叢と動脈硬化との関連性を調査した研究である。腸内細菌の外膜小胞がほとんど腸管から血液中に移行しないことが発見できた。炎症を増悪すると考えられているLPSの生体作用を検証し、弱毒型の証明や、遅延型の炎症増悪機序を示すことができたことは、今後の研究に活かせて、腸内細菌を介する炎症に対する制御治療法の提案につながると考えている。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (29 results)

All 2023 2022 2021 2020 Other

All Journal Article (12 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 7 results) Presentation (11 results) (of which Invited: 1 results) Book (5 results) Remarks (1 results)

  • [Journal Article] 今月の特集 マイクロバイオーム Microbiomeと心血管系疾患2022

    • Author(s)
      山下 智也, 吉田 尚史, 平田 健一
    • Journal Title

      臨床検査

      Volume: 66 Issue: 11 Pages: 1346-1351

    • DOI

      10.11477/mf.1542203170

    • ISSN
      0485-1420, 1882-1367
    • Year and Date
      2022-11-15
    • Related Report
      2022 Annual Research Report
  • [Journal Article] Depletion of Foxp3+ regulatory T cells augments CD4+ T cell immune responses in atherosclerosis-prone hypercholesterolemic mice.2022

    • Author(s)
      Kasahara K, Sasaki N, Amin HZ, Tanaka T, Horibe S, Yamashita T, Hirata KI, Rikitake Y.
    • Journal Title

      Heliyon

      Volume: 8(7) Issue: 7 Pages: e09981-e09981

    • DOI

      10.1016/j.heliyon.2022.e09981

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural differences in bacterial lipopolysaccharides determine atherosclerotic plaque progression by regulating the accumulation of neutrophils.2022

    • Author(s)
      Saito Y, Yamashita T, Yoshida N, Emoto T, Takeda S, Tabata T, Shinohara M, Kishino S, Sugiyama Y, Kitamura N, Yamamoto H, Takaya T, Ogawa J, Hirata K
    • Journal Title

      Atherosclerosis.

      Volume: 358 Pages: 1-11

    • DOI

      10.1016/j.atherosclerosis.2022.08.009

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Gut Microbiota Influence the Development of Abdominal Aortic Aneurysm by Suppressing Macrophage Accumulation in Mice.2022

    • Author(s)
      Shinohara R, Nakashima H, Emoto T, Yamashita T, Saito Y, Yoshida N, Inoue T, Yamanaka K, Okada K, Hirata K
    • Journal Title

      Hypertension

      Volume: 79 Issue: 12 Pages: 2821-2829

    • DOI

      10.1161/hypertensionaha.122.19422

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 腸内細菌と循環器疾患2022

    • Author(s)
      山下 智也, 平田 健一
    • Journal Title

      Journal of JCS Cardiologists

      Volume: 31 Issue: 0 Pages: 63-70

    • DOI

      10.1253/jjcsc.31.0_63

    • ISSN
      0918-9599, 2433-2852
    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] Bacteroides spp. promotes branched-chain amino acid catabolism in brown fat and inhibits obesity2021

    • Author(s)
      Yoshida Naofumi、Yamashita Tomoya、Osone Tatsunori、Shinohara Masakazu、Kitahama Seiichi、Sasaki Kengo、Sasaki Daisuke、Emoto Takuo、Saito Yoshihiro、Kitaura Yasuyuki、Shimomura Yoshiharu、Kondo Akihiko、Kajimura Shingo、Inagaki Takeshi、Yamada Takuji、Hirata Ken-ichi
    • Journal Title

      iScience

      Volume: 24 Issue: 11 Pages: 103342-103342

    • DOI

      10.1016/j.isci.2021.103342

    • NAID

      120007179184

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Two Gut Microbiota-Derived Toxins Are Closely Associated with Cardiovascular Diseases: A Review.2021

    • Author(s)
      Yamashita T, Yoshida N, Emoto T, Saito Y, Hirata K
    • Journal Title

      Toxin

      Volume: 13 Pages: 297-297

    • NAID

      120007041605

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Two Gut Microbiota-Derived Toxins Are Closely Associated with Cardiovascular Diseases: A Review2021

    • Author(s)
      Yamashita Tomoya、Yoshida Naofumi、Emoto Takuo、Saito Yoshihiro、Hirata Ken-ichi
    • Journal Title

      Toxins

      Volume: 13 Issue: 5 Pages: 297-297

    • DOI

      10.3390/toxins13050297

    • NAID

      120007041605

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A possible beneficial effect of Bacteroides on faecal lipopolysaccharide activity and cardiovascular diseases2020

    • Author(s)
      Yoshida Naofumi、Yamashita Tomoya、Kishino Shigenobu、Watanabe Hikaru、Sasaki Kengo、Sasaki Daisuke、Tabata Tokiko、Sugiyama Yuta、Kitamura Nahoko、Saito Yoshihiro、Emoto Takuo、Hayashi Tomohiro、Takahashi Tomoya、Shinohara Masakazu、Osawa Ro、Kondo Akihiko、Yamada Takuji、Ogawa Jun、Hirata Ken-ichi
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 13009-13009

    • DOI

      10.1038/s41598-020-69983-z

    • NAID

      120006879534

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 9.腸内細菌由来LPSと循環器疾患2020

    • Author(s)
      吉田 尚史, 山下 智也, 平田 健一
    • Journal Title

      Precision Medicine

      Volume: 4 Pages: 151-155

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 今注目されている腸内細菌の話題2020

    • Author(s)
      山下 智也, 吉田 尚史, 斎藤 克寛, 田畑 論子, 江本 拓央, 平田 健一
    • Journal Title

      循環器内科

      Volume: 87 Pages: 734-740

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 腸内細菌と循環器疾患2020

    • Author(s)
      山下 智也, 平田 健一
    • Journal Title

      日本医師会雑誌

      Volume: 149 Pages: 1583-1587

    • Related Report
      2020 Annual Research Report
  • [Presentation] 腸内細菌を除去すると、脾臓での単球を減らし、大動脈瘤の発生を抑制する。2023

    • Author(s)
      篠原涼平, 江本拓央, 吉田尚史, 斉藤克寛, 山下智也, 平田健一
    • Organizer
      第86回日本循環器学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Structural Differences in Bacterial LPS Determine Atherosclerotic Progression in Mice.2023

    • Author(s)
      斉藤克寛, 吉田尚史, 江本拓央, 篠原正和, 山下智也, 平田健一
    • Organizer
      第86回日本循環器学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 腸内細菌と循環器疾患2021

    • Author(s)
      山下智也, 平田健一
    • Organizer
      第27回日本心臓リハビリテーション学会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 循環器疾患と腸内細菌2021

    • Author(s)
      山下智也, 平田健一
    • Organizer
      第118回日本内科学会総会・講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Impact of gut microbial LPS on cardiovascular diseases2021

    • Author(s)
      Naofumi Yoshida, Yoshihiro Saito, Takuo Emoto, Tomoya Yamashita, Ken-ichi Hirata
    • Organizer
      第5回日本循環器学会基礎研究フォーラム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Metagenomic analysis of gut microbiota reveals its role in trimethylamine metabolism in heart failure.2021

    • Author(s)
      Takuo Emoto, Tomoya Yamashita, Shintaro Takeda, Yoshihiro Saito, Naofumi Yoshida, Ken-ichi Hirata
    • Organizer
      第5回日本循環器学会基礎研究フォーラム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Structural differences in bacterial LPS lead to different immune responses and progression of atherosclerotic plaque lesions in mice2021

    • Author(s)
      Yoshihiro Saito, Tomoya Yamashita, Naofumi Yoshida, Takuo Emoto, Masakazu Shinohara, Ken-ichi Hirata
    • Organizer
      第5回日本循環器学会基礎研究フォーラム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 腸内細菌に介入する動脈硬化予防2021

    • Author(s)
      山下智也, 平田健一
    • Organizer
      第53回日本動脈硬化学会総会・学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 心不全における腸内細菌の役割と新規治療標的としての重要性2021

    • Author(s)
      山下智也, 平田健一
    • Organizer
      第86回日本循環器学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Bacteroides Decrease Human Fecal Lipopolysaccharide Levels.2020

    • Author(s)
      Naofumi Yoshida, Tomoya Yamashita,Tokiko Tabata, Yoshihiro Saito, Takuo Emoto, Tomohiro Hayashi, Masakazu Shinohara, Ken-ichi Hirata.
    • Organizer
      第84回日本循環器学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 4.動脈硬化を予防するBacteroides 2菌種のリポ多糖(LPS)に着目した抗炎症作用機序の解明2020

    • Author(s)
      斉藤 克寛、山下 智也、吉田 尚史、田畑 論子、江本 拓央、篠原 正和、平田 健一
    • Organizer
      第52回日本動脈硬化学会総会・学術集会
    • Related Report
      2020 Annual Research Report
  • [Book] 心臓2023

    • Author(s)
      山下智也, 江本拓央, 平田健一
    • Total Pages
      72
    • Publisher
      日本医学出版
    • Related Report
      2022 Annual Research Report
  • [Book] ICUとCCU2022

    • Author(s)
      山下 智也, 江本 拓央, 斉藤 克寛, 吉田 尚史, 平田 健一
    • Total Pages
      62
    • Publisher
      医学図書出版
    • ISBN
      9784865175110
    • Related Report
      2022 Annual Research Report
  • [Book] 改訂版 もっとよくわかる!腸内細菌叢2022

    • Author(s)
      山下 智也、福田 真嗣(他)
    • Total Pages
      195
    • Publisher
      羊土社
    • ISBN
      9784758122115
    • Related Report
      2022 Annual Research Report
  • [Book] 腸内微生物叢最前線2021

    • Author(s)
      心疾患と腸内微生物叢
    • Total Pages
      152
    • Publisher
      診断と治療社
    • ISBN
      4787824597
    • Related Report
      2021 Annual Research Report
  • [Book] 臨床循環器学2021

    • Author(s)
      山下 智也, 平田 健一(伊藤 浩, 坂田泰史)
    • Total Pages
      848
    • Publisher
      文光堂
    • Related Report
      2020 Annual Research Report
  • [Remarks] 研究活動

    • URL

      https://www.med.kobe-u.ac.jp/im1/doctor/activity/acti02.html

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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