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Elucidation of the mechanism of miscarriage due to disruption of the pregnancy maintenance mechanism in fetal morphological abnormalities and its application to preimplantation diagnosis

Research Project

Project/Area Number 21K09499
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 InstitutionNagoya City University

Principal Investigator

Suzumori Nobuhiro  名古屋市立大学, 医薬学総合研究院(医学), 准教授 (70326148)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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流産 / 胎生期形態異常 / エクソーム解析 / 胎児染色体 / 胎盤 / トリオ分析 / 不育症 / 絨毛染色体 / シーケンス / NIPT / 遺伝子解析
Outline of Research at the Start

加齢とともに流産率や胎生期形態異常の発生率は上昇し、自然流産のうち80%以上の胎児に染色体・形態異常がみられる。妊娠初期から胎児成分は母体免疫系に認識され母体血中に混入しているが、胎生期形態異常があると脱落膜付近でバリアが形成される。これは母体側の脱落膜において、胎児成分を認識して、免疫・血管新生、妊娠維持機構の破綻を招くと考えられる。しかし、どのようなプロセスをへて、流産の転帰となるのか分かっていない。本研究の目的は、胎生期形態異常の有無を分別し、流産の原因・機序を解明し、トリオ分析で着床前診断へつなげることである。本研究の発展により、流産の予防・予知の解明に広がっていくことが期待できる。

Outline of Final Research Achievements

To elucidate the cause of miscarriage and stillbirth, fetal morphology and chromosomes were analyzed, and trio analysis of the couple and fetus was performed at the time of miscarriage in cases of two or more repeated miscarriage or stillbirth. Genomic DNA was extracted from peripheral blood and/or saliva, whole exome analysis was performed, DNA quantification was confirmed, the libraries were prepared, the exon region capture was performed, and sequencing was performed on NovaSeq6000 for normal karyotype in 16 of the 21 families with unexplained miscarriage cases.
Data were mapped with a whole exome analysis program, analyzed for the homozygous mutations and pathological variants, and searched in databases and PubMed. The elucidation of pathological variants related to miscarriage and stillbirth is difficult at this time, but we are continuing to carry out this study.

Academic Significance and Societal Importance of the Research Achievements

流産・死産の原因検索のため、不育症の16家系、48検体全てを用いて全エクソーム解析によるトリオ分析を行い、ホモ接合体変異や複合ヘテロ接合体変異、病的バリアントの有無を解析したところ、明らかな病的バリアントを絞り込むことができなかったことから、不育症の遺伝学的解析により流産・死産の原因を単一の遺伝子多型の分析により解明することは困難であると思われる。一方、不育症に悩むカップルが多いなかで、その原因は胎児染色体異常、子宮形態異常、抗リン脂質抗体症候群以外にも多岐にわたり、胚・子宮内膜の局所での病理病態について未知の領域が多いと考えられる。

Report

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

    (14 results)

All 2023 2022 2021 Other

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

  • [Journal Article] Prevalence of common aneuploidy in twin pregnancies.2022

    • Author(s)
      Konishi Akiko, Kamei Yoshimasa(18番目/60), et al.
    • Journal Title

      J Hum Genet

      Volume: 65 Issue: 5 Pages: 261-265

    • DOI

      10.1038/s10038-021-01001-0

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] What are the ethical issues involved in noninvasive prenatal testing in Japan?2022

    • Author(s)
      Suzumori Nobuhiro
    • Journal Title

      Journal of Obstetrics and Gynaecology Research

      Volume: 48 Issue: 2 Pages: 300-305

    • DOI

      10.1111/jog.15089

    • Related Report
      2022 Research-status Report
  • [Journal Article] Prenatal Identification of Confined Placental Mosaicism in Pregnant Women with Fetal Growth Restriction.2021

    • Author(s)
      Miyagami K, Shirato N, Izumi M, Hirose T, Yasui O, Hamada S, Matsuoka R, Suzumori N, Sekizawa A.
    • Journal Title

      Reproductive science

      Volume: 29 Issue: 3 Pages: 896-903

    • DOI

      10.1007/s43032-021-00772-3

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Trends of fetal chromosome analysis by amniocentesis before and after beginning of noninvasive prenatal testing: A single‐center experience in Japan2021

    • Author(s)
      Goto Shinobu、Suzumori Nobuhiro、Kumagai Kyoko、Otani Ayano、Ogawa Shino、Sawada Yuki、Inuzuka Saki、Sugiura‐Ogasawara Mayumi
    • Journal Title

      Journal of Obstetrics and Gynaecology Research

      Volume: 47 Issue: 11 Pages: 3807-3812

    • DOI

      10.1111/jog.14965

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 先進医療の中の遺伝子診断・出生前診断2023

    • Author(s)
      鈴森伸宏
    • Organizer
      第41回愛知県母性衛生学会学術集会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 染色体・神経疾患の着床前診断・出生前診断について2023

    • Author(s)
      鈴森伸宏
    • Organizer
      IBSセミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 生殖・周産期の遺伝カウンセリング2023

    • Author(s)
      鈴森伸宏
    • Organizer
      トヨタ記念病院ゲノム医療講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] NIPTの有用性と展望2023

    • Author(s)
      鈴森伸宏
    • Organizer
      日本人類遺伝学会第67回大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Factors associated with high mental stress of pregnant women undergoing NIPT and changes after genetic counseling.2023

    • Author(s)
      Eri Takeda, Nobuhiro Suzumori, Kyoko Kumagai, Iku Taguchi, Kiwa Yamaoka, Rin Sato, Ayako Tanabe, Shinobu Goto, Ayano Otani, Mayumi Sugiura.
    • Organizer
      日本人類遺伝学会第67回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Transitions of background for non-invasive perinatal testing; a single center analysis2023

    • Author(s)
      Kyoko Kumagai, Nobuhiro Suzumori, Eri Takeda, Shinobu Goto, Ayano Otani, Iku Taguchi, Kiwa Yamaoka, Rin Sato, Ayako Tanabe, Mayumi Sugiura.
    • Organizer
      日本人類遺伝学会第67回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] NIPT陰性確認後に流・死産となった経緯についての検討2022

    • Author(s)
      田辺紋子、武田恵利、鈴森伸宏、熊谷恭子、後藤志信、大谷綾乃、田口育、杉浦真弓、町田純一郎、岸上靖幸、小口秀紀
    • Organizer
      第46回日本遺伝カウンセリング学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 当院で周産期管理した胎児18トリソミーについての検討2022

    • Author(s)
      野村佳美 後藤志信 大谷綾乃 熊谷恭子 北折珠央 鈴森伸宏 杉浦真弓 加藤晋 岩田欧介
    • Organizer
      第58回日本周産期・新生児医学会学術集会
    • Related Report
      2021 Research-status Report
  • [Book] 周産期マニュアル2023

    • Author(s)
      後藤志信、鈴森伸宏
    • Total Pages
      773
    • Publisher
      南山堂
    • ISBN
      9784525332013
    • Related Report
      2023 Annual Research Report
  • [Remarks] 名古屋市立大学大学院医学研究科産科婦人科学

    • URL

      https://www.nagoyacumedobgyn.com/research/

    • Related Report
      2021 Research-status Report

URL: 

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

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