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Examination of specific responses in major organs to elucidate the pathology of amniotic fluid embolism

Research Project

Project/Area Number 21K09467
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 InstitutionHamamatsu University School of Medicine

Principal Investigator

Naoaki Tamura  浜松医科大学, 医学部附属病院, 講師 (90402370)

Co-Investigator(Kenkyū-buntansha) 小田 智昭  浜松医科大学, 医学部附属病院, 医員 (00884743)
磯村 直美  浜松医科大学, 医学部附属病院, 助教 (80647595)
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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords羊水塞栓症 / 臓器 / アナフィラクトイド反応 / 特異的反応
Outline of Research at the Start

近年、本邦の妊産婦死亡の原因として羊水塞栓症が多い疾患とされているが、その病態メカニズムが未だ解明されておらず、突然の発症と急激な全身状態の悪化に対して確立した治療法がない。羊水・胎児成分の母体循環の機械的塞栓とアナフィラクトイド反応が関与することが示唆されているが、実際の症状は様々であり、現在行われている羊水塞栓症登録事業では主に心肺機能不全と危機的産科出血の検討は行っているが、本症が誘因になっていると考えられる意識障害、DIC、胎児機能不全の発症機序を説明することは未だ困難な状況にある。本研究は羊水塞栓症の全身の主要臓器の変化および特異的反応の有無を明らかにし新しい治療戦略の探求を目指す。

Outline of Final Research Achievements

The lungs, uterus, myocardium, liver, kidneys, and adrenal glands of 13 cases diagnosed with amniotic fluid embolism were collected, formalin-fixed sections were prepared, and specific antibodies were used for tryptase, c-Kit, and C5a receptors. Immunohistochemical staining was performed, the positive area per square micrometer was measured, and comparisons were made with a control group with non-amniotic fluid embolism. The tryptase-positive area was significantly larger in the alveoli of patients with amniotic fluid embolism, and the C5a receptor-positive area was significantly larger in the alveoli and myometrium of patients with amniotic fluid embolism. Furthermore, in comparison between organs, the tryptase-positive area was significantly larger in the lungs and uterus than in other organs. These results suggest that anaphylactoid reactions in amniotic fluid embolism are likely to occur in the lungs and uterus.

Academic Significance and Societal Importance of the Research Achievements

羊水塞栓症は妊産婦死亡の原因となる疾患の一つであり、その病態として羊水・胎児成分の母体循環内への流入による機械的塞栓や母体のアナフィラクトイド反応が関与することが示唆されているが、今日でも不明な点は多く、突然の発症と急激な全身状態の悪化に対して確立した治療法がないことが問題である。本研究は羊水塞栓症における主要臓器の病理組織検体を用いて病態との関連を調べ、羊水塞栓症では特に肺と子宮におけるアナフィラクトイド反応が特徴的であることが分かった。羊水塞栓症のターゲット臓器を同定した本研究成果は、これらの臓器障害を軽減させる治療が必要であることを裏付けるもので治療戦略の解明に寄与する可能性が高い。

Report

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

    (8 results)

All 2024 2023 2022 2021

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (1 results)

  • [Journal Article] A Case of Consumptive Coagulopathy Before Cardiopulmonary Failure in Amniotic Fluid Embolism and Review of Literature: A Perspective of the Latent Onset and Progression of Coagulopathy2024

    • Author(s)
      Oda Tomoaki、Tamura Naoaki、Yata Daisuke、Oda-Kishimoto Ayako、Itoh Toshiya、Kubota Naohiro、Suzuki Yasuyuki、Kanayama Naohiro、Itoh Hiroaki
    • Journal Title

      Cureus

      Volume: 16 Pages: 55961-55961

    • DOI

      10.7759/cureus.55961

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparative analysis of hyperfibrinolysis with activated coagulation between amniotic fluid embolism and severe placental abruption2024

    • Author(s)
      Ide Rui、Oda Tomoaki、Todo Yusuke、Kawai Kenta、Matsumoto Masako、Narumi Megumi、Kohmura-Kobayashi Yukiko、Furuta-Isomura Naomi、Yaguchi Chizuko、Uchida Toshiyuki、Suzuki Kazunao、Kanayama Naohiro、Itoh Hiroaki、Tamura Naoaki
    • Journal Title

      Scientific Reports

      Volume: 14 Issue: 1 Pages: 272-272

    • DOI

      10.1038/s41598-023-50911-w

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Massive platelet‐rich thrombus formation in small pulmonary vessels in amniotic fluid embolism: An autopsy study2023

    • Author(s)
      Yamashita Atsushi、Oda Tomoaki、Aman Murasaki、Wakasa Tomoko、Gi Toshihiro、Ide Rui、Todo Yusuke、Tamura Naoaki、Sato Yuichiro、Itoh Hiroaki、Asada Yujiro
    • Journal Title

      BJOG: An International Journal of Obstetrics & Gynaecology

      Volume: 130 Issue: 13 Pages: 1685-1696

    • DOI

      10.1111/1471-0528.17532

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The effect of assisted reproductive technology on postpartum bleeding: hormonal cycle frozen embryo transfer might increase blood loss2023

    • Author(s)
      Taniguchi Mizuki、Akinaga Chieko、Suzuki Kota、Tarui Kaori、Tamura Naoaki、Shiko Yuki、Kawasaki Yohei、Nakajima Yoshiki
    • Journal Title

      Journal of Anesthesia

      Volume: 38 Issue: 1 Pages: 19-28

    • DOI

      10.1007/s00540-023-03268-3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Placental pathology predicts infantile neurodevelopment2022

    • Author(s)
      Ueda Megumi、Tsuchiya Kenji J.、Yaguchi Chizuko、Furuta-Isomura Naomi、Horikoshi Yoshimasa、Matsumoto Masako、Suzuki Misako、Oda Tomoaki、Kawai Kenta、Itoh Toshiya、Matsuya Madoka、Narumi Megumi、Kohmura-Kobayashi Yukiko、Tamura Naoaki、Uchida Toshiyuki、Itoh Hiroaki
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 2578-2578

    • DOI

      10.1038/s41598-022-06300-w

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comparative Analysis of Gene Expression Profiles in the Adipose Tissue of Obese Adult Mice With Rapid Infantile Growth After Undernourishment In Utero2022

    • Author(s)
      Suzuki Misako、Kohmura-Kobayashi Yukiko、Ueda Megumi、Furuta-Isomura Naomi、Matsumoto Masako、Oda Tomoaki、Kawai Kenta、Itoh Toshiya、Matsuya Madoka、Narumi Megumi、Tamura Naoaki、Uchida Toshiyuki、Mochizuki Kazuki、Itoh Hiroaki
    • Journal Title

      Frontiers in Endocrinology

      Volume: 13 Pages: 818064-818064

    • DOI

      10.3389/fendo.2022.818064

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inhibitory effects of amniotic fluid on the activated protein C anticoagulation system in maternal plasma2021

    • Author(s)
      Jain Divyanu、Oda Tomoaki、Kawai Kenta、Horikoshi Yoshimasa、Matsumoto Masako、Narumi Megumi、Kohmura-Kobayashi Yukiko、Furuta-Isomura Naomi、Yaguchi Chizuko、Uchida Toshiyuki、Suzuki Kazunao、Kanayama Naohiro、Itoh Hiroaki、Tamura Naoaki
    • Journal Title

      Journal of Thrombosis and Thrombolysis

      Volume: 53 Issue: 1 Pages: 208-212

    • DOI

      10.1007/s11239-021-02513-4

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 羊水塞栓症の最新知見:血清・組織の診断からゲノム解析2023

    • Author(s)
      田村直顕
    • Organizer
      第146回関東連合産科婦人科学会学術集会
    • Related Report
      2023 Annual Research Report

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

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