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Development of novel brain protection therapy by regulating intestinal flora for ischemic brain injury

Research Project

Project/Area Number 17K09763
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Urabe Takao  順天堂大学, 医学(系)研究科(研究院), 教授 (60291663)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords腸内細菌叢 / 虚血性大脳白質損傷 / 酸化ストレス / 炎症 / 認知障害 / 脳虚血 / リポポリサッカライド / 炎症性サイトカイン / 活性化ミクログリア / 高脂肪食 / 脳神経疾患 / 脳梗塞 / 脳保護療法
Outline of Final Research Achievements

In the present study, it was revealed that LPS is effluxed into the blood due to disruption of intestinal barrier function due to dysbiosis in the pathophysiology of diabetes mellitus due to chronic cerebral ischemia, resulting in metabolic endotoxemia. In addition, lipopolysaccharide (LPS) in blood acts on toll like receptor 4 (TLR4) whose expression is increased in the brain due to disruption of blood-brain barrier function due to cerebral ischemia. Moreover, activated immunocompetent cells produce inflammatory cytokines, and progresses inflammatory response. We have proved that the development of inflammatory reaction derived from dysbiosis causes onset and development of brain white matter damage.

Academic Significance and Societal Importance of the Research Achievements

本研究は、腸内細菌叢異常による炎症反応が虚血性脳損傷の進展に関与するメカニズムを明らかにした内容であり、学術的に意義のある成果である。
さらに、超高齢化を迎えている我が国において、脳梗塞発症のみならず認知症発症の病態に腸内細菌叢変化による炎症や酸化ストレスが関与することを示せたことは社会的にも意義が深いことである。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (4 results)

All 2019

All Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Gut dysbiosis promotes LPS-induced neuroinflammation after acute cerebral ischemia in diabetic mice.2019

    • Author(s)
      栗田尚英,山城一雄,黒木卓馬,田中亮太,上野祐司,宮元伸和,卜部貴夫,服部信孝
    • Organizer
      第60回日本神経学会学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Gut dysbiosis promotes lipopolysaccharide-induced neuroinflammation after stroke.2019

    • Author(s)
      N. Kurita, K. Yamashiro, R. Tanaka, Y. Ueno, N. Miyamoto, S, Nakajima, T. Urabe, Y. Yamashiro, N. Hattori
    • Organizer
      The 29th International Symposium on Cerebral Blood Flow, Metabolism and Function (Brain & Brain PET 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Gut dysbiosis causes lipopolysaccharide-mediate inflammation in cerebral ischemia in diabetic mice.2019

    • Author(s)
      栗田尚英,山城一雄,黒木卓馬,田中亮太,上野祐司,卜部貴夫,野本康二,松本 敏,高橋琢也,辻 浩和,朝原 崇,山城雄一郎,服部信孝
    • Organizer
      第59回日本神経学会学術大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 腸内細菌異常による腸管透過性の亢進はLPSを介した急性期脳梗塞の組織障害進展に関与する.2019

    • Author(s)
      栗田尚英,山城一雄,黒木卓馬,田中亮太,上野祐司,宮元伸和,卜部貴夫,山城雄一郎,服部信孝
    • Organizer
      第61回日本脳循環代謝学会学術集会
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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