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Impacts of pericyte behavior on vascular niche maintaining adipocyte progenitor cells in obesity

Research Project

Project/Area Number 17H06705
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Pathological medical chemistry
Research InstitutionUniversity of Toyama

Principal Investigator

Onogi Yasuhiro  富山大学, 大学院医学薬学研究部(薬学), 研究員 (80801761)

Project Period (FY) 2017-08-25 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords脂肪組織肥大化機構 / 血管新生 / 脂肪幹細胞 / マクロファージ / ペリサイト / PDGF / 肥満進展機構 / 血管リモデリング / 肥満 / 脂肪組織 / 血小板由来増殖因子 / 糖代謝 / 細胞・組織 / 糖尿病
Outline of Final Research Achievements

We studied how obesity-related three events, namely accumulation of pro-inflammatory macrophages, angiogenesis and adipogenesis from adipocyte progenitor cells, coordinately involve in the expansion of white adipose tissue (WAT) expansion. Pro-inflammatory-activated ERK signaling pathway coupled with glycolysis induced Pdgfb mRNA expression in macrophages. Diet-induced WAT expansion was prevented in mice depleted adipose tissue macrophages with prevention of pericytes dissociation from vessels and neovascularization. The number of adipocyte progenitor cells in WAT was decreased in this condition compared to that in control mice. These findings suggest that pro-inflammatory macrophages accumulated close to vasculature remodel vascular networks by exposing abundant PDGF-B against pericytes within obese WAT. In addition, adipocyte progenitor cells appear to proliferate within the microenvironment where vascular remodeling occurs during obesity.

Academic Significance and Societal Importance of the Research Achievements

肥満関連疾患の克服は、本邦のみならず全世界で解決すべき課題である。肥満病態の進展機構の理解は、肥満に起因する疾患の治療戦略構築の基礎となりえる。肥大化した脂肪組織に集積する炎症性マクロファージによる慢性炎症は、肥満関連疾患の引き金となることが明らかになってきている。それに加えて、本知見は炎症性マクロファージが血管を再構築することで、新たな脂肪細胞を生成する環境を生み出すことを見出した。また、炎症性マクロファージは高血糖下においてより活性化する知見を踏まえると、本研究は、肥満・高血糖病態での血糖降下療法の重要性を示すことに加え、マクロファージの活性制御を標的とした新規治療戦略の可能性を提示する。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • Research Products

    (8 results)

All 2019 2018 2017

All Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Presentation] Pro-inflammatory Macrophages Promote Vascular Remodeling in White Adipose Tissue during Diet-Induced Obesity2019

    • Author(s)
      Yasuhiro Onogi, Tsutomu Wada, Hiroshi Tsuneki, Toshiyasu Sasaoka
    • Organizer
      The 17th Japan-Korea Diabetic Nephropathy Seminar
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Pro-inflammatory Macrophages Promote Vascular Remodeling via PDGF-B signaling in White Adipose Tissue during Obesity2019

    • Author(s)
      Toshiyasu Sasaoka
    • Organizer
      Daegu Symposium on Obesity & Diabetes
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] マクロファージ除去が内臓脂肪組織の肥大化を抑制するメカニズムの検討2018

    • Author(s)
      松澤崇俊、和田努、小野木康弘、桶川晃、渡邊愛理、恒枝宏史、笹岡利安
    • Organizer
      第61回日本糖尿病学会年次学術集会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 脂肪組織マクロファージの代謝リプログラミングによるPDGF-B産生機構の解析2018

    • Author(s)
      小野木康弘、和田努、松澤崇俊、桶川晃、恒枝宏史、笹岡利安
    • Organizer
      第61回日本糖尿病学会年次学術集会
    • Related Report
      2018 Annual Research Report
  • [Presentation] マクロファージによる血管新生を介した内臓脂肪組織肥大化機構の解明2018

    • Author(s)
      松澤崇俊、和田努、小野木康弘、桶川晃、渡邊愛理、池田恵介、中野実、恒枝宏史、笹岡利安
    • Organizer
      日本薬学会北陸支部第130回例会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Glycolytic Activation Promotes PDGF-B Production in Adipose Tissue Macrophages during Obesity Development2018

    • Author(s)
      Yasuhiro Onogi, Tsutomu Wada, Takatoshi Matsuzawa, Akira Okekawa, Eri Watanabe, Hiroshi Tsuneki, Toshiyasu Sasaoka
    • Organizer
      American Diabetes Association 78th Scientific Sessions
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 脂肪組織CD11c陽性マクロファージにおけるPdgfb発現機構の解明.2018

    • Author(s)
      小野木康弘、和田努、松澤崇俊、桶川晃、恒枝宏史、笹岡利安.
    • Organizer
      日本薬学会第138年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 内臓脂肪組織マクロファージの除去が肥満を抑制する機序の検討.2017

    • Author(s)
      松澤崇俊、和田 努、小野木康弘、桶川 晃、渡邊愛理、恒枝宏史、笹岡利安.
    • Organizer
      日本薬学会北陸支部第129回例会
    • Related Report
      2017 Annual Research Report

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Published: 2017-08-25   Modified: 2020-03-30  

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