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Activation of the cGAS-STING pathway in bone remodeling microenvironment aging cells

Research Project

Project/Area Number 22K21004
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0907:Oral science and related fields
Research InstitutionHyogo Medical University

Principal Investigator

Hattori Hirokazu  兵庫医科大学, 医学部, 助教 (50836103)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords破骨前駆細胞 / 老化 / 骨微小環境 / cGAS-STING / 骨リモデリング / SASP / cGAS - STING経路
Outline of Research at the Start

老化細胞ではSASP(senescence-associated secretory phenotype)と呼ばれるタンパクなどの分泌現象が生じており、炎症性疾患の惹起の可能性を指摘されている。骨リモデリングにおける微小環境は、加齢に伴い細胞老化を起こした骨細胞、骨芽細胞、破骨細胞などのSASPを介した因子により形成され、SASPは骨恒常性を破綻させる因子の一つではないかと考えている。
SASPの誘導にcGAS - STING経路の活性化が寄与しており、本研究では骨リモデリングの微小環境におけるSASPとcGAS - STING経路との関連の解明を目的とする。

Outline of Final Research Achievements

RAW264.7 cells, which are macrophage-like osteoclast precursor cells, showed decreased osteoclast differentiation with senescence, activating the cGAS-STING pathway and inducing SASP. When senescent RAW264.7 cells were treated with STING inhibitor, the induction of SASP was suppressed along with the inhibition of cGAS-STING pathway, and osteoclast differentiation was restored. The STING pathway or suppressed SASP factors were suggested to be associated with factors that regulate osteoclast differentiation.

Academic Significance and Societal Importance of the Research Achievements

破骨前駆細胞は老化するとcGAS-STING経路が活性化し、SASPが誘導され、また、STING阻害剤の使用により、SASPを抑制でき、破骨細胞分化能が回復する可能性が示唆された。c-GAS-STING経路と破骨細胞分化能に関連があることが考えられ、骨粗鬆症を代表とした加齢性の骨代謝性疾患のさらなる病態解明や、新規治療薬の開発につながるのではないかと考えている。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (1 results)

All 2023

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

  • [Presentation] Senescence osteoclast precursors induce SASP through cGAS-STING2023

    • Author(s)
      Hirokazu Hattori
    • Organizer
      The American Society for Bone and Mineral Research 2023 Annual meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research

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Published: 2022-09-01   Modified: 2025-01-30  

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