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xtracellular vesicles from mouse bone marrow macrophages-derived osteoclasts treated with zoledronic acid contain miR-146a-5p and miR-322-3p, which inhibit osteoclast function

Research Project

Project/Area Number 22K10230
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57060:Surgical dentistry-related
Research InstitutionTokyo Medical University

Principal Investigator

CHIKAZU Daichi  東京医科大学, 医学部, 主任教授 (30343122)

Co-Investigator(Kenkyū-buntansha) 落谷 孝広  東京医科大学, 医学部, 特任教授 (60192530)
藤居 泰行  東京医科大学, 医学部, 助教 (90829748)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2024: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords破骨細胞 / エクソソーム / 薬剤関連顎骨壊死 / MRONJ / EV
Outline of Research at the Start

本研究は、薬剤関連顎骨壊死(Medication-related osteonecrosis of the jaws: MRONJ)におけるエクソソームの関与による基礎的知見を見出し、発症メカニズムおよび病態の解明を目的とする。昨今、細胞間コミュニケーションツールとしてエクソソームが果たす役割に注目が集まっており、癌や免疫疾患など多様な疾患の診断や治療への臨床応用が期待されている。本研究の最終目標は、これまで不明であったMRONJのバイオマーカーや新規治療ターゲットの発見に繋げ、現在においても多くの臨床家が難渋しているMRONJの診断や治療に革新的な一歩をもたらすことである。

Outline of Final Research Achievements

Medication-related osteonecrosis of the jaw (MRONJ) is an intractable form of osteonecrosis of the jaw that rarely occurs in patients using bone resorption inhibitors such as bisphosphonates (BPs). Recently, the role of extracellular vesicles (EVs) in communication between osteoclasts and surrounding bone cells has been confirmed. This study aimed to elucidate the effects of EVs derived from osteoclasts treated with zoledronic acid (ZA), one of the BPs on osteoclast function. qRT-PCR analysis confirmed the amount of these specific miRNAs, with miR-146a-5p, and miR-322-3p being significantly upregulated by ZA. Overexpression of miR-146a-5p and miR-322-3p influences osteoclast differentiation, and Traf6 is a target gene of miR-146a-5p. On the other hand, Overexpression of miR-322-3p affects osteoblast differentiation. We suggest that ZA-treated osteoclast-derived EVs may play an important role in osteoclast function and bone resorption

Academic Significance and Societal Importance of the Research Achievements

本研究では、miR-146a-5pと322-3pが破骨細胞機能を抑制し、Traf6はmiR-146a-5pの標的遺伝子である可能性を示しました。よって、破骨細胞EV由来のmiR-146a-5pと322-3pがMRONJの発症に重要な役割を果たしていることを示唆しています。これらのmiRNAやEVは、将来的にMRONJのバイオマーカーや新規治療ターゲットとなる可能性があると考えています。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (3 results)

All 2025 2024 2023

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Extracellular vesicles from mouse bone marrow macrophages-derived osteoclasts treated with zoledronic acid contain miR-146a-5p and miR-322-3p, which inhibit osteoclast function2025

    • Author(s)
      Minami Sakura、Fujii Yasuyuki、Yoshioka Yusuke、Hatori Ayano、Kaneko Kotaro、Ochiya Takahiro、Chikazu Daichi
    • Journal Title

      Bone

      Volume: 190 Pages: 117323-117323

    • DOI

      10.1016/j.bone.2024.117323

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 破骨細胞由来の細胞外小胞は、miR-146a-5pおよびmiR-322-3pを輸送し、Traf6を標的とすることでMRONJの病態を進行させる2024

    • Author(s)
      南 咲良
    • Organizer
      日本骨代謝学会学術集会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Critical role of osteoclast-derived EVs in medication-related osteonecrosis of the jaws (MRONJ)2023

    • Author(s)
      南咲良
    • Organizer
      American Society for Bone and Mineral Research 2023 Annual Meeting
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research

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Published: 2022-04-19   Modified: 2026-01-16  

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