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Creation of a Mutant EDA for the Treatment of Preterm Birth

Research Project

Project/Area Number 19K09801
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56040:Obstetrics and gynecology-related
Research InstitutionKyoto University

Principal Investigator

Chigusa Yoshitsugu  京都大学, 医学研究科, 助教 (80779158)

Co-Investigator(Kenkyū-buntansha) 近藤 英治  京都大学, 医学研究科, 准教授 (10544950)
最上 晴太  京都大学, 医学研究科, 講師 (40378766)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords早産 / 羊膜 / TLR4
Outline of Research at the Start

腟分泌物中のfetal fibronectin(fFN)に含まれるExtra domain A (EDA)が、ヒト羊膜間葉細胞に存在するToll-like receptor 4(TLR4)-MD2と相互作用し、COX-2、サイトカイン、MMPの産生を促進することで早産が惹起される。本研究ではEDA-TLR4-MD2相互作用に必須の結合部位を特定し、その部位を改変した変異EDAを作成する。さらにその変異EDAが、ヒト羊膜間葉細胞において、TLR4-MD2の活性化を阻害することで、炎症(子宮頸管熟化・子宮収縮)およびコラーゲン分解(羊膜破綻)を抑制し、早産治療に資するか否かの効果判定を行う。

Outline of Final Research Achievements

Extra domain A (EDA), which is contained in fetal fibronectin in vaginal secretions, binds to TLR4 in amniotic mesenchymal cells and promotes the production of COX-2 and MMPs, thereby inducing preterm labor. In this study, we aimed to identify the amino acid residues essential for EDA-TLR4 binding and to create mutant EDA with modifications of these residues. First, the 90 amino acid sequence comprising EDA was divided into four parts, and EDA with each amino acid deleted was created. As a result, EDAs with deletions of seven specific amino acids failed to bind to TLR4. Among them, when tyrosine 36 was mutated, EDA did not bind to TRL4. In other words, of the 90 amino acids in EDA, tyrosine 36 was found to be essential for binding to TLR4.

Academic Significance and Societal Importance of the Research Achievements

早産のマーカーとして知られるフィブロネクチンが羊膜と作用して早産を惹起するメカニズムの一端を解明した。特に、フィブロネクチン中のEDAを構成するわずか1つのアミノ酸(チロシン36)が、羊膜間葉細胞のTLR4との結合に必須であることを明らかにしたことは、学術的に価値がある。今後、このチロシン36は早産予防、治療のための新規薬剤開発の標的となり、全身への副作用が少ない画期的な薬剤創出につながる可能性がある。早産は新生児死亡、後遺症の重要な原因であり、早産の予防・治療は周産期医学領域における喫緊の課題であることから、早産治療薬の創出は社会的意義が大きい。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020 2019

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 4 results)

  • [Journal Article] The effect of celecoxib for treatment of preterm labor on fetuses during the second trimester of pregnancy: A pilot case series2022

    • Author(s)
      Ohtsuki Miki、Chigusa Yoshitsugu、Mogami Haruta、Ueda Akihiko、Kawasaki Kaoru、Yamaguchi Ken、Mandai Masaki、Kondoh Eiji
    • Journal Title

      Taiwanese Journal of Obstetrics and Gynecology

      Volume: 61 Issue: 2 Pages: 277-281

    • DOI

      10.1016/j.tjog.2022.02.015

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Lower systolic blood pressure levels in early pregnancy are associated with a decreased risk of early-onset superimposed preeclampsia in women with chronic hypertension: a multicenter retrospective study2021

    • Author(s)
      Ueda Akihiko、Hasegawa Masaaki、Matsumura Noriomi、Sato Hiroshi、Kosaka Kenzo、Abiko Kaoru、Yoshioka Shinya、Yoshida Takaaki、Tatsumi Keiji、Higuchi Toshihiro、Fujita Kohei、Sasaki Shoko、Goto Masaki、Takai Hiroshi、Chigusa Yoshitsugu、et al.
    • Journal Title

      Hypertension Research

      Volume: 45 Issue: 1 Pages: 135-145

    • DOI

      10.1038/s41440-021-00763-6

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chronic abruption-oligohydramnios sequence (CAOS) revisited: possible implication of premature rupture of membranes2021

    • Author(s)
      Chigusa Yoshitsugu、Mogami Haruta、Minamiguchi Sachiko、Kido Aki、Ishida Ayami、Kurata Yasuhisa、Yasuda Eriko、Kawasaki Kaoru、Horie Akihito、Yamaguchi Ken、Mandai Masaki、Kondoh Eiji
    • Journal Title

      The Journal of Maternal-Fetal & Neonatal Medicine

      Volume: - Issue: 25 Pages: 1-7

    • DOI

      10.1080/14767058.2021.1929159

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Histological distribution pattern of hemosiderin deposition on the chorionic plate and fetal membrane of diffuse chorioamniotic hemosiderosis related to chronic abruption oligohydramnios sequence2021

    • Author(s)
      Ishida Ayami、Minamiguchi Sachiko、Yamada Yosuke、Nakagawa Ryota、Chigusa Yoshitsugu、Kondoh Eiji、Mandai Masaki、Haga Hironori
    • Journal Title

      Placenta

      Volume: 105 Pages: 1-6

    • DOI

      10.1016/j.placenta.2021.01.013

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Cushing’s syndrome during pregnancy with different clinical courses: Two case reports2020

    • Author(s)
      Umemiya Maki、Chigusa Yoshitsugu、Minamiguchi Sachiko、Horie Akihito、Mandai Masaki、Kondoh Eiji
    • Journal Title

      Hypertension Research in Pregnancy

      Volume: 8 Issue: 1 Pages: 26-30

    • DOI

      10.14390/jsshp.HRP2019-019

    • NAID

      130007847927

    • ISSN
      2187-5987, 2187-9931
    • Year and Date
      2020-03-30
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mechanisms of thrombin-Induced myometrial contractions: Potential targets of progesterone2020

    • Author(s)
      Nishimura Fumitomo、Mogami Haruta、Moriuchi Kaori、Chigusa Yoshitsugu、Mandai Masaki、Kondoh Eiji
    • Journal Title

      PLOS ONE

      Volume: 15 Issue: 5 Pages: 0231944-0231944

    • DOI

      10.1371/journal.pone.0231944

    • NAID

      120006939198

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] New era of trophoblast research: integrating morphological and molecular approaches2020

    • Author(s)
      Io Shingo、Kondoh Eiji、Chigusa Yoshitsugu、Kawasaki Kaoru、Mandai Masaki、Yamada and Shigehito
    • Journal Title

      Human Reproduction Update

      Volume: 26 Issue: 5 Pages: 611-633

    • DOI

      10.1093/humupd/dmaa020

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Intracervical elastomeric sealant in an ex vivo model.2019

    • Author(s)
      Kondoh E, Kawamura Y, Chigusa Y, Mogami H, Ueda A, Hamanishi J, Mandai M.
    • Journal Title

      J Matern Fetal Neonatal Med.

      Volume: 19 Issue: 7 Pages: 1-3

    • DOI

      10.1080/14767058.2019.1626367

    • Related Report
      2019 Research-status Report
    • Peer Reviewed

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Published: 2019-04-18   Modified: 2023-01-30  

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