• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Understanding the population of maternal cells transferred during fetal development and exploring their biological significance

Research Project

Project/Area Number 21K19254
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 44:Biology at cellular to organismal levels, and related fields
Research InstitutionThe Graduate University for Advanced Studies (2023)
The University of Tokyo (2021-2022)

Principal Investigator

Irie Naoki  総合研究大学院大学, 統合進化科学研究センター, 教授 (10536121)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsマイクロキメリズム / 細胞レベルのエピジェネティクス / 母由来細胞 / キメラ / 発生
Outline of Research at the Start

我々ヒトを含む有胎盤哺乳類では、胎児期に母親の細胞(母由来細胞)が移入し、出生後も生涯にわたり全身の臓器組織に残り続ける。この母由来細胞は、自己免疫疾患の発症・悪化、免疫寛容や組織再生といった多様な生体内現象への関与が示唆されてきたが、何がきっかけで異なる現象に結びつくのかは不明である。本課題では、移入する細胞の数・種類や分布の違いが多様な現象に関与している可能性を検討する。今年度は、移入している母親細胞の細胞種同定を行うことを目的とする。特に、1細胞解析技術などを活用することで、実際に胎仔に入り込んでいる細胞種の同定を行い、それら細胞がどの胎仔組織に存在するかを空間情報とともに調べる。

Outline of Final Research Achievements

In placental mammals, including humans, it is known that maternal cells transferred via the placenta and breast milk remain in the organs and tissues of the offspring throughout their lifetime. However, the physiological role of these maternal cells has not been fully elucidated, nor has the composition of the cell types been clearly identified.
This study suggests that maternal cells may potentially suppress excessive activation of fetal immunity. Additionally, while immune system cell types are predominant, we revealed that the ratio of maternal cells transferred to the fetus can vary significantly due to environmental factors, even among siblings having close genetic backgrounds.

Academic Significance and Societal Importance of the Research Achievements

我々の体に起こる健康上の様々な問題は、どのように解明・克服されていくべきなのだろうか。我々の体の細胞はもともと受精卵に由来することを考えると、我々自身の細胞の振る舞いを理解することで問題は解明・克服できそうに思える。しかし、本研究が明らかにしたように、微量ながらも我々の体内を一生涯循環する母由来細胞も、今後しっかりと考慮にいれていく必要がありそうだ。実際、母由来細胞は生後も子の免疫系が過剰に活性化しないよう抑制している可能性が今回明らかになった。今後、ヒトにけるさらなる研究によって、ヒトの健康に母親細胞がどのように関与しているかがさらに明らかになると期待される。

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

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results)

  • [Journal Article] Emergent roles of maternal microchimerism inpostnatal development.2022

    • Author(s)
      Alexandria Borges*, Castellan Flore, and Naoki Irie*
    • Journal Title

      Development, Growth & Differentiation

      Volume: 65(1) Issue: 1 Pages: 75-81

    • DOI

      10.1111/dgd.12830

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Postnatal depletion of maternal cells biases T lymphocytes and natural killer cells' profiles toward early activation in the spleen.2022

    • Author(s)
      Castellan Flore*, and Naoki Irie*
    • Journal Title

      Biology Open

      Volume: 11 (11) Issue: 11

    • DOI

      10.1242/bio.059334

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Whole-embryonic identification of maternal microchimeric cell types in mouse using single-cell RNA sequencing2022

    • Author(s)
      Fujimoto Kana、Nakajima Akira、Hori Shohei、Tanaka Yumiko、Shirasaki Yoshitaka、Uemura Sotaro、Irie Naoki
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 18313-18313

    • DOI

      10.1038/s41598-022-20781-9

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Whole embryonic detection of maternal microchimeric cells highlights significant differences in their numbers among individuals2021

    • Author(s)
      Fujimoto K, et al.
    • Journal Title

      Plos one

      Volume: 16 Issue: 12 Pages: 1-11

    • DOI

      10.1371/journal.pone.0261357

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Intrinsically embedded inertial force in phenotypic evolution?2023

    • Author(s)
      Naoki Irie
    • Organizer
      The 3rd AsiaEvo
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Does the bottle-neck of the developmental hourglass model really define body plan?2023

    • Author(s)
      Naoki Irie
    • Organizer
      ICG-Ocean 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Stability and robustness could be contributing to long term conservation of vertebrates' body plan2023

    • Author(s)
      Naoki Irie
    • Organizer
      Virtual Human Development Project
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] なぜ動物の体の基本構造は進化的に変わりにくい?2023

    • Author(s)
      入江直樹
    • Organizer
      東北大学 個体ダイナミクスセミナーシリーズ
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 我々の体内の母親由来細胞の頻度や細胞種を決める因子は何か?2022

    • Author(s)
      梅村太一郎, 入江直樹
    • Organizer
      日本分子生物学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Postnatal depletion of maternal cells shifts splenic NK and CD8+ T-cell profiles toward mature and activated phenotypes2022

    • Author(s)
      Castellan Flore, Naoki Irie
    • Organizer
      FOCIS Annual meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Postnatal depletion of maternal cells biases immune cytotoxic cells' profile toward maturation and activation in the spleen2022

    • Author(s)
      Castellan Flore, Naoki Irie
    • Organizer
      Single Cell Biology at Wellcome Sanger
    • Related Report
      2022 Research-status Report
  • [Presentation] Postnatal depletion of maternal cells biases immune cytotoxic cells' profile toward maturation and activation in the spleen2022

    • Author(s)
      Castellan Flore, Naoki Irie
    • Organizer
      日本発生生物学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Comprehensive identification of maternal microchimeric cell types in fetus2021

    • Author(s)
      Kana Fujimoto, Naoki Irie
    • Organizer
      Maternal-Fetal Newborn Immunity
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Elucidation of cell type and distribution of maternal microchimeric cells in fetus2021

    • Author(s)
      Kana Fujimoto, Naoki Irie
    • Organizer
      23rd International Congress of Zoology
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2021-07-13   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi