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Analysis of chromosome dynamics during embryo development

Research Project

Project/Area Number 17K08144
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Integrative animal science
Research InstitutionOsaka City University (2018-2019)
Institute of Physical and Chemical Research (2017)

Principal Investigator

Shu Hashimoto  大阪市立大学, 大学院医学研究科, 特任准教授 (30570949)

Co-Investigator(Kenkyū-buntansha) 北島 智也  国立研究開発法人理化学研究所, 生命機能科学研究センター, チームリーダー (00376641)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords異常分裂 / 初期胚発生 / 染色体異常 / 単為発生 / 第一有糸分裂 / Live cell imaging / 体外受精卵 / ウシ / 応用動物 / 発生工学 / 染色体 / 受精卵
Outline of Final Research Achievements

Live imaging which enables us to observe chromosomal behavior in cells revealed that14% of normally-fertilized ova underwent abnormal 1st mitosis without syngamy (bi-parental parthenogenesis) in cattle. Bi-parental parthenogenesis was observed in human. Separate dual spindle formation might cause bi-parental parthenogenesis probably due to longer distance between male and female pronuclei at the nuclear envelope breakdown.

Academic Significance and Societal Importance of the Research Achievements

ヒトやウシを含めた哺乳類受精卵において、正常に受精したにも関わらず、父親由来と母親由来の染色体の融合が起こらず、それぞれの単為発生胚から構成される受精卵(両親性の単為発生卵)が生じる。これは雌雄両前核が乖離し、前核膜崩壊後のシンガミーを経ずに有糸分裂後期を開始することが原因である。その結果、受精卵は単為発生割球のみから構成され、正常な発生は望めない。雌雄両前核を卵細胞の中心に位置させ、両前核間の距離を短く保つために細胞骨格が重要な働きをする。分裂異常の機構を明らかにし、従来は正常な発生の望めない受精卵からの産子作成の道を開く。ヒトと同じ単胎動物であるウシの知見は生殖医療への応用にもつながる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (10 results)

All 2019 2018 2017 Other

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (1 results) Remarks (2 results)

  • [Journal Article] Mitochondrial function in immature bovine oocytes is improved by an increase of cellular cyclic AMP2019

    • Author(s)
      Shu Hashimoto, Masaya Yamanaka, Takayuki Yamochi, Hisataka Iwata, Ryouka Kawahara-Miki, Masayasu Inoue & Yoshiharu Morimoto
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 5167-5167

    • DOI

      10.1038/s41598-019-41610-6

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Oral administration of l-carnitine improves the clinical outcome of fertility in patients with IVF treatment.2018

    • Author(s)
      Kitano Y, Hashimoto S, Matsumoto H, Yamochi T, Yamanaka M, Nakaoka Y, Fukuda A, Inoue M, Ikeda T, Morimoto Y
    • Journal Title

      Gynecol Endocrinol

      Volume: 29 Issue: 8 Pages: 1-5

    • DOI

      10.1080/09513590.2018.1431769

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Optimum culture duration for growing oocytes to attain meiotic and fertilization competence2017

    • Author(s)
      Yamochi T, Hashimoto S, Yamanaka M, Nakaoka Y, Morimoto Y
    • Journal Title

      Journal of Reproduction and Development

      Volume: 63 Issue: 6 Pages: 591-595

    • DOI

      10.1262/jrd.2017-110

    • NAID

      130006250251

    • ISSN
      0916-8818, 1348-4400
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] L-carnitine restores mitochondrial function of human embryos decreased with female donor age2019

    • Author(s)
      Shu Hashimoto
    • Organizer
      European Society of Human Reproduction and Embryology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 1.cAMP値の上昇によるウシG2期卵母細胞のミトコンドリア機能の亢進2019

    • Author(s)
      橋本 周
    • Organizer
      第 64 回日本生殖医学会学術講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 給餌条件がマウスの生殖能力に及ぼす影響2019

    • Author(s)
      橋本 周
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ウシ受精卵における第一有糸分裂における染色体分配異常2019

    • Author(s)
      橋本 周
    • Organizer
      第112回日本繁殖生物学会
    • Related Report
      2019 Annual Research Report
  • [Book] 高齢不妊診療ハンドブック:卵子と胚のミトコンドリア機能2019

    • Author(s)
      橋本 周
    • Total Pages
      376
    • Publisher
      医学書院
    • ISBN
      9784260039574
    • Related Report
      2019 Annual Research Report
  • [Remarks] 大阪市立大学大学院医学研究科臨床医学専攻 リプロダクティブサイエンス

    • URL

      http://www.med.osaka-cu.ac.jp/reproduction/

    • Related Report
      2019 Annual Research Report
  • [Remarks] 大阪市立大学大学院医学研究科臨床医学専攻 リプロダクティブサイエンス研究所

    • URL

      http://www.med.osaka-cu.ac.jp/reproduction/

    • Related Report
      2018 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

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