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Development of polysaccharide gel culture system of in vitro embryo culture system.

Research Project

Project/Area Number 19K22372
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 42:Veterinary medical science, animal science, and related fields
Research InstitutionTokyo University of Agriculture

Principal Investigator

Iwata Hisataka  東京農業大学, 農学部, 教授 (50385499)

Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords多糖ゲル / 培養基質 / 体外受精 / 体外発育卵子 / アクチン重合 / 胚盤胞 / 卵子発育 / 胚発生 / Focal Adhesion / 卵子 / 胚 / Hippo signaling / 多糖軟質ゲル / Hippoシグナル / 多糖類 / 細胞外核酸
Outline of Research at the Start

卵子や胚の培養は生殖工学や生殖医療の基盤技術である。これらの技術は硬いシャーレ上での培養から得た知見を集約したものであり、現行の培養技術では、体内から回収した卵や胚と同等のものは作成できない。一方、体内環境には、大量の支持細胞、柔軟な基質そして体液に溶けた生理活性物質やエクソソームがある。申請者は安全で簡便に調整できる植物由来の多糖類を用いて柔らかい基質を作製し、この新基質を用いて、細胞の性状変化を誘起し、これに応じて分泌されるエキソソームmiRNAを調べ、基質と培養環境を含む統合的な新培養システムを開発する。

Outline of Final Research Achievements

The present study examined the effect of soft polysaccharides gel made of Xanthan gum (XG) and locust bean gum (LBG) on development of bovine oocytes and embryos. Oocytes-granulosa cells complexes (OGCs) derived from early antral follicles, oocytes derived from antral follicles and early developmental stage embryos were cultured on the XG-LBG gel. Using the XG-LBG gel as a culture substrate for in vitro oocyte growth, in vitro oocyte maturation, and in vitro development of embryos improved their developmental ability compared with those plastic plate-counterparts. RNA-Seq of the granulosa cells of OGCs showed that the differential expressed genes were associated with focal adhesion, phosphatidylinositol 3'-kinase-Akt and Hippo signaling, and regulation of actin cytoskeleton. Oocytes and embryos developed on the XG-LBG gel had higher expression levels of F-actin compared with those developed on the plate. LBG-XG gel is useful substrate for in vitro development of oocytes and embryos.

Academic Significance and Societal Importance of the Research Achievements

卵子や胚の発育にはシャーレ上のドロップが用いられる。プラスチックの特性が細胞の形態や分化に影響することが明らかにされつつあるが、本研究では卵子も胚も多糖ゲルで作成した基質の特性に反応して、その発育率や質を大きく改善することが明らかになった。多糖ゲル上では細胞内のmiRNAのプロファイルも大きく変化することが明らかになった。現行の培養環境は、基質性状から改善の余地が大きいことが明らかになった。

Report

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

    (7 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results)

  • [Journal Article] Effects of a gel culture system made of polysaccharides (xanthan gum and locust bean gum) on in vitro bovine oocyte development and gene expression of the granulosa cells.2021

    • Author(s)
      Sugimoto A, Inoue Y, Tanaka K, Sinozawa A, Shirasuna K, Iwata H.
    • Journal Title

      Molecular Reproduction and Development

      Volume: 88 Issue: 7 Pages: 516-524

    • DOI

      10.1002/mrd.23518

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Xanthan gum and locust bean gum substrate improves bovine embryo development.2020

    • Author(s)
      Hara S, Aoki S, Nagata M, Shirasuna K, Noguchi T, Iwata H.
    • Journal Title

      Reprod Domest Anim.

      Volume: 55 Issue: 9 Pages: 1124-1131

    • DOI

      10.1111/rda.13750

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Xanthan gum and Locust bean gum gel supports <i>in vitro</i> development of porcine oocytes derived from early antral follicles2019

    • Author(s)
      Yasuhisa Munakata, Ayaka Sugimoto, Koumei Shirasuna, Takehito Kuwayama, Hisataka Iwata
    • Journal Title

      Journal of Reproduction and Development

      Volume: 65 Issue: 6 Pages: 551-554

    • DOI

      10.1262/jrd.2019-074

    • NAID

      130007768754

    • ISSN
      0916-8818, 1348-4400
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 多糖類で作成した基質が、ウシ初期胞状卵胞卵子の体外発育に及ぼす影響2021

    • Author(s)
      杉本 彩嘉,井上 裕貴,田中 啓介,岩田 尚孝
    • Organizer
      第114回 日本繁殖生物学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 増粘多糖類で作成したゲル基質を体外成熟に用いるとウシ胚発生が有意に改善する2021

    • Author(s)
      原 駿介,井上 裕貴,田中 啓介,野口 龍生,白砂 孔明,岩田 尚孝
    • Organizer
      第114回 日本繁殖生物学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] キサンタンガムを基質に用いたウシ体外受精胚の培養2019

    • Author(s)
      永田美樹, 岩田尚孝
    • Organizer
      第64回 日本生殖医学会学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] キサンタンガムを基質に用いたブタ未熟卵子の体外発育2019

    • Author(s)
      杉本 彩嘉, 岩田 尚孝
    • Organizer
      第64回 日本生殖医学会学術講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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