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Pathogenesis of ectopic calcificaion in disorders of calcium and phosphate metabolism.

Research Project

Project/Area Number 17K16161
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Endocrinology
Research InstitutionThe University of Tokyo

Principal Investigator

Kinoshita Yuka  東京大学, 医学部附属病院, 助教 (00746729)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords腫瘍性骨軟化症 / FGF23 / 低リン血症 / Klotho / 骨芽細胞分化 / 異所性石灰化 / 転写因子
Outline of Final Research Achievements

We have investigated the mechanism of how mesenchymal tumors in tumor-induced osteomalacia produce fibroblast growth factor 23 (FGF23), which is one of the hormones usually secreted from the bone. We have performed RNA-sequencing analysis using an FGF23-producing tumor in the parotid gland and found the elevated expression of Klotho in the tumor. Additionally, we have seen the activation of MAPK signaling pathway in the tumor. Therefore, we assume that FGF23 secreted from tumors may activate the receptor complex of Klotho/FGFR1c and facilitate further the production of FGF23 in tumors by a positive feedback mechanism.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果から、TIOの原因腫瘍に発現するKlothoがFGF23産生調節に関与している可能性が示された。近年Klothoが骨細胞や骨芽細胞に発現することが報告されていることから、TIOの原因腫瘍におけるKlotho発現は、間葉系細胞の骨芽細胞分化、すなわち腫瘍内における異所性石灰化を反映している可能性がある。したがって、TIOにおけるKlotho発現調節機構を更に検討することで、TIO以外の疾患における異所性石灰化の機序の解明につながる可能性がある。

Report

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

    (7 results)

All 2018 2017

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (5 results) (of which Invited: 2 results)

  • [Journal Article] Ectopic expression of Klotho in fibroblast growth factor 23 (FGF23)-producing tumors that cause tumor-induced rickets/osteomalacia (TIO).2018

    • Author(s)
      Kinoshita Y, Takashi Y, Ito N, Ikegawa S, Mano H, Ushiku T, Fukayama M, Nangaku M, Fukumoto S
    • Journal Title

      Bone Rep.

      Volume: 10 Pages: 100192-100192

    • DOI

      10.1016/j.bonr.2018.100192

    • NAID

      120006715991

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] X-Linked Hypophosphatemia and FGF23-Related Hypophosphatemic Diseases: Prospect for New Treatment.2018

    • Author(s)
      Kinoshita Y, Fukumoto S.
    • Journal Title

      Endocr Rev.

      Volume: 39(3) Issue: 3 Pages: 274-291

    • DOI

      10.1210/er.2017-00220

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] The activation of FGF receptor signaling is involved in the pathogenesis of FGF23-producing tumors2018

    • Author(s)
      Kinoshita Y
    • Organizer
      The 15th Bone Biology Forum
    • Related Report
      2018 Annual Research Report
  • [Presentation] FGF23関連低リン血症の病態2018

    • Author(s)
      木下祐加
    • Organizer
      第36回日本骨代謝学会学術集会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 成人期のFGF23関連低リン血症性疾患の診断と治療FGF23関連低リン血症の病態2018

    • Author(s)
      木下祐加
    • Organizer
      第36回日本骨代謝学会学術集会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 腫瘍性骨軟化症の原因腫瘍における異所性Klotho(KL)発現2018

    • Author(s)
      木下祐加
    • Organizer
      第91回日本内分泌学会学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 腫瘍性骨軟化症の原因腫瘍における異所性Klotho発現2017

    • Author(s)
      木下祐加、高士祐一、伊東伸朗、池川志郎、福本誠二
    • Organizer
      第35回日本骨代謝学会学術集会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2020-03-30  

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