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Analysis of dysfunction of osteocytes to reveal the targets of treatment in genetical bone diseases

Research Project

Project/Area Number 21H02881
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionOsaka University

Principal Investigator

Ozono Keiichi  大阪大学, 大学院連合小児発達学研究科, 招へい教授 (20270770)

Co-Investigator(Kenkyū-buntansha) 道上 敏美  地方独立行政法人大阪府立病院機構大阪母子医療センター(研究所), 骨発育疾患研究部門, 部長 (00301804)
窪田 拓生  大阪大学, 大学院医学系研究科, 准教授 (40629135)
大幡 泰久  大阪大学, 大学院医学系研究科, 助教 (20805460)
岡田 随象  大阪大学, 大学院医学系研究科, 教授 (70727411)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
Fiscal Year 2023: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Keywords骨細胞 / 骨形成不全症 / 低リン血症性くる病 / 骨系統疾患 / 遺伝子発現 / 骨折 / リン代謝 / FGF23 / 骨芽細胞 / 骨形成 / 代謝性骨疾患 / 骨疾患 / くる病
Outline of Research at the Start

小児の骨疾患の骨細胞に的を絞った研究から、骨量のコントロールとリン代謝の恒常性維持の機能の関連性と骨疾患の発症機序を明らかにすることを目的とする。骨細胞の機能障害を呈する疾患、骨形成不全症とX染色体優性低リン血症性くる病(XLH)を対象として、モデル動物から骨を摘出し、骨細胞を採取する方法と、iPS細胞から骨細胞への分化を誘導して解析する方法を用い、特異的な遺伝子の発現とその相互関係を明らかにし、それを治療ターゲットに据えることを行う。本研究により、新しい治療法の開発につながることが期待される。

Outline of Final Research Achievements

We generated osteogenesis imperfecta (OI) model mice and obtained the heterozygous mice. We compare the heterozygous mice and C57BL/6J wild type (wt) mice in terms of bone volume and bone quality. The heterozygous mice showed less body weight at 12 weeks and had a small osteoporotic bone in vertebrae and the femur. A 3-point bending test demonstrated bone fragility of the heterozygous mice, where the maximum displacement and fracture energy were significantly decreased. The administration of 4-phenylbutyric acid might be effective in increasing body length and weight, but no apparent effects on bone were observed. The hyp mice, a mice model for X-linked hypophosphatemic rickets, served to investigate the gene expression in osteocytes. As a result, 1904 genes were up-regulated and 654 genes were down-regulated. The tentative bioinformatic analysis suggests genes involved in the phosphate signaling pathway were included in the genes differentially expressed.

Academic Significance and Societal Importance of the Research Achievements

骨細胞の主要な機能の2つは、骨形成と骨吸収のバランスをとること、および、リンの血中濃度をコントロールすることである。本研究では、研究者らが小児科医であり、小児の骨系統疾患診療を専門としていることから、未だ明らかでない、小児の骨疾患の骨細胞の機能の解析に的を絞った研究である。まず、骨形成不全症(OI)モデル動物を作出し、その骨を解析し、骨細胞機能との関連性を検討する基盤を与えた。また、治療法の開発にも貢献できるモデルであった。X染色体低リン血症性くる病(XLH)のモデルマウスより骨細胞を単離し、網羅的に遺伝子発現を検討した。その結果、リン代謝と骨代謝の接点を示唆するようなデータを得た。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (14 results)

All 2024 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 3 results) Book (1 results)

  • [Journal Article] Complex intrinsic abnormalities in osteoblast lineage cells of X-linked hypophosphatemia: Analysis of human iPS cell models generated by CRISPR/Cas9-mediated gene ablation2024

    • Author(s)
      Nakanishi Tatsuro、Yamazaki Miwa、Tachikawa Kanako、Ueta Ayu、Kawai Masanobu、Ozono Keiichi、Michigami Toshimi
    • Journal Title

      Bone

      Volume: 181 Pages: 117044-117044

    • DOI

      10.1016/j.bone.2024.117044

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Association of trabecular bone score and bone mineral apparent density with the severity of bone fragility in children and adolescents with osteogenesis imperfecta: A cross-sectional study2023

    • Author(s)
      Ohata Yasuhisa、Kitaoka Taichi、Ishimi Takeshi、Yamada Chieko、Nakano Yukako、Yamamoto Kenichi、Takeyari Shinji、Nakayama Hirofumi、Fujiwara Makoto、Kubota Takuo、Ozono Keiichi
    • Journal Title

      PLOS ONE

      Volume: 18 Issue: 8 Pages: e0290812-e0290812

    • DOI

      10.1371/journal.pone.0290812

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Self-Administration of Burosumab in Children and Adults with X-Linked Hypophosphataemia in Two Open-Label, Single-Arm Clinical Studies2023

    • Author(s)
      Kubota Takuo、Namba Noriyuki、Tanaka Hiroyuki、Muroya Koji、Imanishi Yasuo、Takeuchi Yasuhiro、Kanematsu Masanori、Sun Wei、Seino Yoshiki、Ozono Keiichi
    • Journal Title

      Advances in Therapy

      Volume: 40 Issue: 4 Pages: 1530-1545

    • DOI

      10.1007/s12325-022-02412-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Phosphate promotes osteogenic differentiation through non-canonical Wnt signaling pathway in human mesenchymal stem cells2022

    • Author(s)
      Rui Shumin、Kubota Takuo、Ohata Yasuhisa、Yamamoto Kenichi、Fujiwara Makoto、Takeyari Shinji、Ozono Keiichi
    • Journal Title

      Bone

      Volume: 164 Pages: 116525-116525

    • DOI

      10.1016/j.bone.2022.116525

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 4-Phenylbutyric acid enhances the mineralization of osteogenesis imperfecta iPSC-derived osteoblasts2021

    • Author(s)
      Takeyari Shinji、Kubota Takuo、Ohata Yasuhisa、Fujiwara Makoto、Kitaoka Taichi、Taga Yuki、Mizuno Kazunori、Ozono Keiichi
    • Journal Title

      Journal of Biological Chemistry

      Volume: 296 Pages: 100027-100027

    • DOI

      10.1074/jbc.ra120.014709

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 骨形成不全症(Osteogenesis imperfecta:OI)の疾患モデルマウスの作出と、 4-PBA(4-Phenylbutyric acid)の治療効果に対する検討2023

    • Author(s)
      齋藤広幸
    • Organizer
      第26回 小児分子内分泌研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Clinical Features of FGF23-Related Hypophosphatemic Rickets/Osteomalacia: A Multicenter National Survey in Japan2023

    • Author(s)
      Makoto Fujiwara, Taichi Kitaoka, Yasuhisa Ohata, Hirofumi Nakayama, Yukako Nakano, Kenichi Yamamoto, Hiroyuki Saito, Chieko Yamada, Takeshi Ishimi, Ikumi Ueda, Tatsuya Nakamichi, Rieko Takatani, Masanori Minagawa, Inoue Daisuke, Yasuhiro Takeuchi, Seiji Fukumoto, Takashi Akamizu, Keiichi Ozono, and Takuo Kubota
    • Organizer
      ASBMR 2023 Annual Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 当科XLH患者に対するブロスマブ治療長期効果の検討2023

    • Author(s)
      大幡泰久, 山田知絵子, 中野由佳子, 山本賢一, 武鑓真司, 藤原誠, 北岡太一, 窪田拓生, 大薗恵一
    • Organizer
      第96回日本内分泌学会学術総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 本邦における FGF23 関連低リン血症性くる病・骨軟化症患者の臨床像の解析2023

    • Author(s)
      藤原誠, 石見壮史, 山田知絵子, 武鑓真司, 山本賢一, 中野由佳子, 中山尋文, 大幡泰久, 北岡太一, 窪田拓生, 大薗恵一
    • Organizer
      第41回 日本骨代謝学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Col1a1G643S/+ mouse model of osteogenesis imperfecta2022

    • Author(s)
      Shinji Takeyari, Yasuhisa Ohata, Makoto Fujiwara, Taichi Kitaoka, Takuo Kubota, Keiichi Ozono
    • Organizer
      ASBMR 2022 Annual Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 骨形成不全症の新規モデルマウス2022

    • Author(s)
      武鑓真司, 大幡泰久, 藤原誠, 北岡太一, 窪田拓生, 大薗恵一
    • Organizer
      第55回 日本小児内分泌学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 小児骨形成不全症におけるビスホスホネート治療および体重は血清スクレロスチン値に影響する2022

    • Author(s)
      藤原誠, 北岡太一, 石見壮史, 山田知絵子, 武鑓真司, 山本賢一, 中野由佳子, 中山尋文, 大幡泰久, 窪田拓生, 大薗恵一
    • Organizer
      第95回 日本内分泌学会学術総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Genotype-phenotype analysis, and assessment of the importance of the zinc-binding site in PHEX in Japanese patients with X-linked hypophosphatemic rickets using 3D structure modeling.2021

    • Author(s)
      Ohata Y, Ishihara Y, Takeyari S, Kubota T, Ozono K
    • Organizer
      American Society for Bone and Mineral Research
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Book] 整形・災害外科「骨系統疾患と骨粗鬆症」2023

    • Author(s)
      大薗恵一
    • Total Pages
      10
    • Publisher
      金原出版
    • Related Report
      2022 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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