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Role of angiotensin II in bone erosion and systemic bone loss in arthritis

Research Project

Project/Area Number 17K09991
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Collagenous pathology/Allergology
Research InstitutionKawasaki Medical School

Principal Investigator

Morita Yoshitaka  川崎医科大学, 医学部, 教授 (50346441)

Co-Investigator(Kenkyū-buntansha) 向井 知之  川崎医科大学, 医学部, 准教授 (00454421)
佐藤 稔  川崎医科大学, 医学部, 准教授 (70449891)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsアンジオテンシンII / 関節リウマチ / TNF / 関節炎 / レニン・アンジオテンシン系 / 骨びらん / TNFトランスジェニックマウス / 関節炎モデル / 骨破壊 / 破骨細胞 / アンジオテンシンIIタイプ1受容体 / 免疫学
Outline of Final Research Achievements

Angiotensin II (Ang II) is the main effector peptide of the renin-angiotensin system (RAS), which regulates the cardiovascular system. The RAS is reportedly involved in bone metabolism. The upregulation of RAS components has been shown in arthritic synovial tissues, suggesting the potential involvement of Ang II in arthritis. Accordingly, in the present study, we aimed to investigate the role of Ang II in bone erosion and systemic bone loss in arthritis. Ang II was infused by osmotic pumps in tumor necrosis factor-transgenic (TNF-tg) mice. Ang II infusion did not significantly affect the severity of clinical and histological inflammation, whereas bone erosion in the inflamed joints was significantly augmented. Ang II administration did not affect the bone mass of the tibia or vertebra.
Our findings indicate an important implication for the pathogenesis of inflammatory bone destruction and for the clinical use of RAS inhibitors in patients with rheumatoid arthritis.

Academic Significance and Societal Importance of the Research Achievements

アンジオテンシンIIは血圧調節因子であり、アンジオテンシンIIの作用を抑制するアンジオテンシン受容体拮抗薬は、降圧薬として広く臨床現場で使用されている。本研究はレニン・アンジオテンシン系の過剰な活性化が、関節リウマチ患者などにみられる炎症性骨破壊のリスク因子となり得ることを示している。 関節リウマチにおいては、過剰な炎症性サイトカインを制御してもなお関節破壊が進行していく患者が存在し、骨破壊のメカニズム解明が求められている。本研究の成果はリウマチ治療薬の新規開発に寄与することも期待される動物モデルを用いた基礎的知見である。

Report

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

    (5 results)

All 2018 2017

All Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Both systemic administration of angiotensin II and its type 1 receptor gene deletion exacerbates erosive bone destruction in hTNF-transgenic arthritis mice2018

    • Author(s)
      三戸崇史, 向井知之, 藤田俊一, 児玉尚子, 長洲晶子, 守田吉孝
    • Organizer
      第62回日本リウマチ学会総会・学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] アンジオテンシンIIはアンジオテンシンIIタイプ2受容体(AT2R)を介して関節炎マウスの骨破壊を増悪させる2018

    • Author(s)
      三戸崇史, 向井知之, 藤田俊一, 河原恭子, 長洲晶子, 児玉尚子, 守田吉孝
    • Organizer
      第36回日本骨代謝学会学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] Angiotensin II exacerbates bone destruction in human TNF-transgenic arthritis mice2017

    • Author(s)
      三戸崇史, 向井知之, 藤田俊一, 児玉尚子, 長洲晶子, 平野紘康、守田吉孝
    • Organizer
      第61回日本リウマチ学会総会・学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] アンジオテンシンⅡは関節炎マウスの骨破壊を増悪させる2017

    • Author(s)
      三戸崇史, 向井知之, 藤田俊一, 児玉尚子, 長洲晶子, 守田吉孝
    • Organizer
      第35回日本骨代謝学会学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] Angiotensin II type I receptor deficiency exacerbates erosive bone destruction of hTNF-transgenic arthritis mice2017

    • Author(s)
      三戸崇史, 向井知之, 藤田俊一, 児玉尚子, 長洲晶子, 曽根照喜、守田吉孝
    • Organizer
      The 2017 ACR/ARHP Annual Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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

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