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Mechanisms of ulcerative colitis focusing on mucosal barrier disorder caused by bacteria possessed flagella

Research Project

Project/Area Number 18K06019
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 42030:Animal life science-related
Research InstitutionShinshu University

Principal Investigator

Yamanaka Hitoki  信州大学, 学術研究院総合人間科学系, 准教授 (30533921)

Co-Investigator(Kenkyū-buntansha) 増山 律子  立命館大学, 食マネジメント学部, 教授 (60297596)
大沢 一貴  長崎大学, 先導生命科学研究支援センター, 教授 (90244756)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsヘリコバクター属菌 / 盲結腸粘膜 / 腸内細菌叢 / 粘膜バリア / 抗菌ペプチド / マウス / 盲大腸粘膜 / ゲノム解析 / 大腸粘膜 / ゲノム配列 / 炎症
Outline of Final Research Achievements

Helicobacter japonicus (Hj), which colonizes in lower intestinal tract of mice and has flagella, induces severe inflammation in the intestinal mucosa of SCID mice lucking functional B and T cells. In BALB/c mice, Hj infection enhances the expression of various cytokines and inducing mild inflammation in mucosa. In addition, Hj controls the expression of antimicrobial factors such as MUC2 and LYPD8 to create the environment in which they could colonize in intestine of mice. Hj infection also enhances the expression of Reg3β, Reg3γ and βdefensin14 resulting in the dysbiosis such as an increase in Bacteroides and a decrease in Clostridium XIVa and IV. Increased expression of these antimicrobial peptides maintained for a long period after infection. Our study shows that Hj infection induces dysbiosis resulting in causing mild inflammation persistently in intestinal mucosa

Academic Significance and Societal Importance of the Research Achievements

Helicobacter属菌は、ピロリ菌以外では病原性やそのメカニズムが明らかではなく、また、人獣共通感染症と認識される菌も多い。本研究では、我々が実験用マウスから分離したHelicobacter japonicusに着目し、その病原性と共に一部ではあるがそのメカニズムについて明らかにすることができた。一方で、この細菌の感染による炎症誘導等の負の影響の他に、宿主粘膜バリアシステムの向上への貢献についても考えられ、この菌による宿主への影響で新たな視点が得られた。更に、本研究では、抗菌ペプチド発現評価系であるオルガノイドの作出法についても目途が立ち、今後の研究に応用が期待できる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (12 results)

All 2020 2019 2018

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (6 results) (of which Invited: 2 results) Book (1 results)

  • [Journal Article] Backcrossing to an appropriate genetic background improves the birth rate of carbohydrate sulfotransferase 14 gene-deleted mice2020

    • Author(s)
      SHIMADA Shin、YOSHIZAWA Takahiro、TAKAHASHI Yuki、NITAHARA-KASAHARA Yuko、OKADA Takashi、NOMURA Yoshihiro、YAMANAKA Hitoki、KOSHO Tomoki、MATSUMOTO Kiyoshi
    • Journal Title

      Experimental Animals

      Volume: 69 Issue: 4 Pages: 407-413

    • DOI

      10.1538/expanim.19-0150

    • NAID

      130007938664

    • ISSN
      0007-5124, 1341-1357, 1881-7122
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 実験動物マウスおよびラットにおける薬剤耐性菌2020

    • Author(s)
      山中仁木
    • Journal Title

      実験動物ニュース

      Volume: 69 Pages: 130-133

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 実験動物におけるピロリ菌以外のヘリコバクター属菌2019

    • Author(s)
      山中仁木
    • Journal Title

      信州医学雑誌

      Volume: 67 Pages: 81-89

    • NAID

      130007655258

    • Related Report
      2019 Research-status Report
  • [Journal Article] Antimicrobial resistance profiles of vancomycin-resistant Enterococcus species isolated from laboratory mice2019

    • Author(s)
      Yamanaka H, Kadomatsu R, Takagi T, Ohsawa M, Yamamoto N, Kubo N, Takemoto T, Ohsawa K
    • Journal Title

      Journal of Veterinary Science

      Volume: 20 Issue: 2

    • DOI

      10.4142/jvs.2019.20.e13

    • NAID

      120006987736

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Phosphate-dependent luminal ATP metabolism regulates transcellular calcium transport in intestinal epithelial cells2018

    • Author(s)
      Uekawa Atsushi、Yamanaka Hitoki、Lieben Liesbet、Kimira Yoshifumi、Uehara Mariko、Yamamoto Yoko、Kato Shigeaki、Ito Kosei、Carmeliet Geert、Masuyama Ritsuko
    • Journal Title

      The FASEB Journal

      Volume: 32 Issue: 4 Pages: 1903-1915

    • DOI

      10.1096/fj.201700631r

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 筋拘縮型エーラスダンロス症候群の疾患モデル動物としてのChst14 遺伝子欠損マウスの解析2020

    • Author(s)
      吉沢隆浩、嶋田新、高橋有希、水本秀二、山田修平、山中仁木、古庄知己、松本清司
    • Organizer
      第67回日本実験動物学会総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Helicobacter japonicus infection contributes the development of potent mucosal barrier systems2019

    • Author(s)
      山中仁木、増山律子、大沢一貴
    • Organizer
      第92回日本細菌学会総会
    • Related Report
      2019 Research-status Report
  • [Presentation] ピロリ菌以外のヘリコバクター属菌ーこれまでの知見ー2019

    • Author(s)
      山中仁木
    • Organizer
      第8回実験動物科学シンポジウム「動物モデルを用いた感染症研究」(主催 日本実験動物学会)
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] ヘリコバクター属菌感染による生体への影響とは2018

    • Author(s)
      山中仁木
    • Organizer
      日本実験動物医学会シンポジウム(第65回日本実験動物学会総会)
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 細胞外液リン量に応答するATP依存性カルシウム吸収機構の検討2018

    • Author(s)
      山中 仁木, 増山 律子
    • Organizer
      第36回日本骨代謝学会学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] ビタミンD応答性ATP代謝による腸上皮粘膜免疫制御2018

    • Author(s)
      山中 仁木, 増山 律子
    • Organizer
      第4回Neo Vitamin D Workshop学術集会
    • Related Report
      2018 Research-status Report
  • [Book] 糖尿病・内分泌代謝科「ビタミンDの内分泌学」(担当:「ビタミンDの組織特異的作用」)2020

    • Author(s)
      増山律子、山中仁木
    • Publisher
      科学評論社
    • Related Report
      2019 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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