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Glucose sensing in osteoclasts and the regulatory mechanism of their differentiation

Research Project

Project/Area Number 22K20998
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0907:Oral science and related fields
Research InstitutionKyushu Dental College

Principal Investigator

Yasuda Kazuma  九州歯科大学, 歯学部, 特別研修員 (10966641)

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骨代謝 / 破骨細胞 / 糖 / 糖質 / 分化 / 増殖 / 骨吸収 / 糖質センサー
Outline of Research at the Start

糖尿病や肥満の程度と歯周炎による骨破壊の程度が一致することや,骨折のリスクが上昇することが知られている.しかし,糖尿病や肥満が呈する高血糖状態と骨代謝の関連には不明な点が多い.予備実験から,甘味受容体のT1R3が破骨細胞に発現し,細胞外の血糖状態を検知し,破骨細胞分化を制御している可能性が示された.そこで本研究では,T遺伝子改変マウスを用いた実験から,T1R3を基軸とした糖(エネルギー)代謝と骨代謝連関の理解とT1R3を標的とした新たな骨代謝性疾患治療法確立のための分子基盤形成を目指す.

Outline of Final Research Achievements

T1R1, T1R2, and T1R3 taste receptors monitor energy and nutritional status not only in the oral cavity but also in various tissues. It has been reported that mice with loss of T1R3 function show high bone mass, but the details remain unclear. In this study, we investigated the function of T1R3 in osteoclasts, and found that osteoclasts lacking T1R3 had reduced differentiation potential. On the other hand, overexpression of T1R3 promoted osteoclast differentiation, which was further enhanced by the addition of glucose or artificial sweeteners. Surprisingly, T1R3 may accept glucose as a homodimer of glucose and promote osteoclast differentiation via MAP kinase.

Academic Significance and Societal Importance of the Research Achievements

従来,舌を中心とした口腔内に発現し味感覚の受容を司るだけと思われていた味覚受容体が,破骨細胞にも発現し,その機能を明らかにすることができた本研究の価値は歯科領域だけにとどまらない.この学術的意味合いだけでなく,今後高血糖状態における骨吸収の活性化にT1R3が関与することを明らかにできれば,将来的にこれらT1R3は糖尿病や肥満における骨有害事象に対する治療標的になり得る.すなわち,T1R3は創薬のターゲットに適したGタンパク質共役型受容体であり, T1R3を治療標的とした骨代謝疾患治療薬開発に貢献できる可能性がある.

Report

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

    (1 results)

All 2022

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results)

  • [Journal Article] Tyrosine Kinase Src Is a Regulatory Factor of Bone Homeostasis2022

    • Author(s)
      Matsubara Takuma、Yasuda Kazuma、Mizuta Kana、Kawaue Hiroka、Kokabu Shoichiro
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 23 Issue: 10 Pages: 5508-5508

    • DOI

      10.3390/ijms23105508

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access

URL: 

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

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