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Establishment of the molecular basis for the treatment of endometriosis based on the crosstalk between hepcidin and PGC1a

Research Project

Project/Area Number 21K16775
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56040:Obstetrics and gynecology-related
Research InstitutionKyoto Prefectural University of Medicine

Principal Investigator

KATAOKA HISASHI  京都府立医科大学, 医学(系)研究科(研究院), 学内講師 (90849027)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
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)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsヘプシジン / 酸化ストレス / 子宮内膜症 / 鉄代謝 / NAD代謝 / 活性酸素種 / LPS / 鉄 / hepcidin / PGC-1a / endometriosis
Outline of Research at the Start

子宮内膜症の発症機序として、月経血中に含まれる変化した子宮内膜細胞を起源とする逆流説が広く受け入れられている。研究代表者らは月経血中に高濃度の遊離鉄が存在し、さらにhepcidinが細胞内鉄貯留の促進を介して正常子宮内膜細胞に炎症性変化を与え、子宮内膜症の発症に関与する可能性を見出した。また転写共役因子であるPGC-1αがhepcidinを介した細胞内鉄貯留により発現が促進され、hepcidinとPGC-1αの関連性を明らかにした。本研究ではhepcidinによる鉄代謝や調節経路を明らかにすることで、病態進展の制御はもとより発症予防にも寄与する新たな治療・予防戦略の分子基盤を確立させる。

Outline of Final Research Achievements

It was revealed that a high concentration of hepcidin is present in the menstrual blood of patients with endometriosis. Hepcidin causes a decrease in the membrane distribution concentration of ferroportin, the only transporter that expels iron from cells to the extracellular space, promoting intracellular iron concentration. Furthermore, excessive intracellular iron concentration leads to a relative decrease in NAD levels due to the promotion of ROS production, causing inflammatory changes not only in normal endometrial stromal cells but also in the stromal cells of endometriotic lesions. This suggests a deep involvement in the onset and progression of endometriosis. It was also found that bacterial endotoxin LPS plays an important role in the onset and pathogenesis, which can be suppressed by the administration of antioxidants.

Academic Significance and Societal Importance of the Research Achievements

子宮内膜症の治療は専ら外科的治療とホルモン治療が行われてきたが、妊孕性の温存や副作用の回避のために新たな治療戦略の確立が望まれている。われわれは鉄代謝と酸化ストレスの観点から子宮内膜症の発症と病態進展に新たな知見を見出した。特に子宮内膜症を引き起こす細胞内に過剰の鉄が貯留することにより、細胞内の酸化ストレスが上昇、その細胞に炎症性変化を引き起こすことが明らかとなった。これらの分子学的機構については新たな治療ターゲットとして有用であると考えられ、さらなる研究を継続している。

Report

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

    (5 results)

All 2024 2023

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Hepcidin as a key regulator of iron homeostasis triggers inflammatory features in the normal endometrium2023

    • Author(s)
      Izumi Yuko、Kataoka Hisashi、Koshiba Akemi、Ito Fumitake、Tanaka Yukiko、Takaoka Osamu、Maeda Eiko、Okimura Hiroyuki、Sugahara Takuya、Tarumi Yosuke、Shimura Koki、Khan Khaleque N.、Kusuki Izumi、Mori Taisuke
    • Journal Title

      Free Radical Biology and Medicine

      Volume: 209 Pages: 191-201

    • DOI

      10.1016/j.freeradbiomed.2023.10.402

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Low-Nutrient Environment-Induced Changes in Inflammation, Cell Proliferation, and PGC-1α Expression in Stromal Cells with Ovarian Endometriosis2023

    • Author(s)
      Shimura K, Tarumi Y, Fujii M, Ogawa K, Maeda E, Tanaka Y, Okimura H, Kataoka H, Takaoka O, Ito F, Koshiba A, Khan KN, Kusuki I, Kitawaki J, Mori T.
    • Journal Title

      Reprod Sci.

      Volume: 30 Issue: 4 Pages: 1094-1102

    • DOI

      10.1007/s43032-022-01089-5

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] NADサルベージ経路は子宮内膜症の 治療ターゲットして有用である2024

    • Author(s)
      片岡 恒、岡村綾香、片山晃久、和泉祐子、垂水洋輔、 カーン・カレク、楠木 泉、森 泰輔
    • Organizer
      第45回日本エンドメトリオーシス学会学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Hepcidinは細胞内鉄蓄積を介して子宮内膜細胞の炎症性変化を誘発する2023

    • Author(s)
      和泉祐子、片岡 恒、片山晃久、志村光揮、藤井麻耶、垂水洋輔、沖村浩之、田中佑輝子、前田英子、伊藤文武、小芝明美、楠木 泉、カーン・カレク、森 泰輔
    • Organizer
      日本抗加齢学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] NAD metabolic pathway as a therapeutic target for endometriosis2023

    • Author(s)
      Hisashi Kataoka, Ayaka Okamura, Akihisa Katayama, Yuko Izumi, Koki Shimura, Yosuke Tarumi, Khaleque N Khan, Izumi Kusuki, Taisuke Mori
    • Organizer
      The 11th Asian Congress on Endometriosis
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research

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

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