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Analysis of epigenome infertiity mechanism by the state-of-art single cell and ultrtrace histone modification methods

Research Project

Project/Area Number 19KK0183
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 44:Biology at cellular to organismal levels, and related fields
Research InstitutionYokohama City University

Principal Investigator

OHBO Kazuyuki  横浜市立大学, 医学研究科, 教授 (70250751)

Co-Investigator(Kenkyū-buntansha) 富澤 信一  横浜市立大学, 医学部, 講師 (00704628)
鈴木 絢子  東京大学, 大学院新領域創成科学研究科, 准教授 (00770348)
Project Period (FY) 2019-10-07 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000)
Fiscal Year 2022: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2021: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2020: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords幹細胞 / エピジェネティクス / 精子形成 / 生殖細胞 / 精子幹細胞 / ヒストン修飾 / シングルセル解析 / エピゲノム
Outline of Research at the Start

多くの生き物で、次の世代に正確な遺伝子情報を与える仕組みを担っているものの一つが精子であるが、その正確性を生み出すメカニズムは明らかでない。そこで、精子の元となる精子幹細胞における遺伝子発現やゲノム修飾をシングルセルレベルで解析し、正確性を醸し出す分子基盤を明らかにする。このシングルセル解析は、最近、特に欧米のグループから次々と目覚ましい進歩が報告されており、これを直接現地で習得後、日本で立ち上げ、研究を推し進める。

Outline of Final Research Achievements

Spermatogonial stem cells adopt a mitotic mode in which intercellular bridges are present due to incomplete cytokinesis. Therefore, only one spermatogonia is a stem cell and two or more connected spermatogonia are considered progenitors that have lost their stem cell activity. On the other hand, advances in genome-wide gene expression analysis and marker studies have begun to reveal the heterogeneity of undifferentiated spermatogonia. In this study, the scNMT method, the latest comprehensive single-cell analysis, was adopted from overseas and applied to elucidate the actual situation of undifferentiated spermatogonia. The existence of a group of H3K4 methyltransferases has also been reported. The functional analysis of these molecules in undifferentiated spermatogonia was carried out in collaboration with an overseas group that had extensively genetically modified these molecules.

Academic Significance and Societal Importance of the Research Achievements

日本の研究領域は、欧米中国との格差が広がっている。特に次世代シークエンサーの出現後、ゲノムワイドにヒストンやDNA修飾、遺伝子発現の情報が入手可能となり、エピゲノム研究が急速に進歩を遂げた。さらに少ない材料からのエピゲノム解析も急速な進歩を見せている。しかし、日本は、この流れに遅れを取っていることは否めない。そこで、最先端のシングルセルマルチオミックス研究と、ES細胞を材料にH3K4me3修飾を中心に精力的な研究を行っている高い研究レベルをもつグループとの国際共同研究を行い、その成果を私どもが長年行っている精子幹細胞研究に反映させ、より高いレベルの研究へと結びつけた。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (20 results)

All 2024 2023 2021 Other

All Int'l Joint Research (6 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (6 results) (of which Invited: 1 results) Remarks (5 results)

  • [Int'l Joint Research] Technische Universtaet Dresden(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] The Babraham Institute(英国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Technische Universitaet Dresden(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Babraham Institute(英国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Technische Univesitaet Dresden(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Babraham Institute(英国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Tsga8 is required for spermatid morphogenesis and male fertility in mice2021

    • Author(s)
      Kobayashi Yuki、Tomizawa Shin-ichi、Ono Michio、Kuroha Kazushige、Minamizawa Keisuke、Natsume Koji、Dizdarevic Selma、Dockal Ivana、Tanaka Hiromitsu、Kawagoe Tatsukata、Seki Masahide、Suzuki Yutaka、Ogonuki Narumi、Inoue Kimiko、Matoba Shogo、Anastassiadis Konstantinos、Mizuki Nobuhisa、Ogura Atsuo、Ohbo Kazuyuki
    • Journal Title

      Development

      Volume: 148 Issue: 8

    • DOI

      10.1242/dev.196212

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Maintenance DNA methylation in pre-meiotic germ cells regulates meiotic prophase by facilitating homologous chromosome pairing2021

    • Author(s)
      Takada Yuki、Yaman-Deveci Ruken、Shirakawa Takayuki、Sharif Jafar、Tomizawa Shin-ichi、Miura Fumihito、Ito Takashi、Ono Michio、Nakajima Kuniko、Koseki Yoko、Shiotani Fuyuko、Ishiguro Kei-ichiro、Ohbo Kazuyuki、Koseki Haruhiko
    • Journal Title

      Development

      Volume: 148 Issue: 10

    • DOI

      10.1242/dev.194605

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Father-to-offspring transmission of extremely long NOTCH2NLC repeat expansions with contractions: genetic and epigenetic profiling with long-read sequencing2021

    • Author(s)
      Fukuda H, Yamaguchi D, Nyquist K, Yabuki Y, Miyatake S, Uchiyama Y, Hamanaka K, Saida K, Koshimizu E, Tsuchida N, Fujita A, Mitsuhashi S, Ohbo K, Satake Y, Sone J, Doi H, Morihara K, Okamoto T, Takahashi Y, Wenger AM, Shioda N, Tanaka F, Matsumoto N, Mizuguchi T
    • Journal Title

      Clin Epigenetics

      Volume: 13 Issue: 1 Pages: 204-204

    • DOI

      10.1186/s13148-021-01192-5

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] エピジェネティックチェックポイントの精子幹細胞分化における意義について2024

    • Author(s)
      大保和之
    • Organizer
      第4回有性生殖研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 精子幹細胞分化を制御するエピジェネティックな機構の解析2024

    • Author(s)
      大保和之, 南澤恵佑、尾野道男、中島久仁子、Rachel Fellows、富澤信一
    • Organizer
      第129回日本解剖学会総会・全国学術総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Spermatogonial chromatin priming for spermiogenic and post-fertilization development2023

    • Author(s)
      富澤 信一、小林 裕貴、Rachel Fellows、鈴木 穣、小倉 淳郎、大保 和之
    • Organizer
      第16回エピジェネティクス研究会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 精子幹細胞におけるプライミング機構により制御されているWfdc15aの精子形成における役割2023

    • Author(s)
      大保和之
    • Organizer
      日本遺伝学会第95回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Role of a novel protease inhibitor for spermatogenesis and immune homeostasis2023

    • Author(s)
      富澤信一, Rachel Fellows, 尾野道男, 黒羽一誠, Ivana Dockal, 南澤恵佑, 鈴木穣, 才津 浩智, 大保和之
    • Organizer
      第128回日本解剖学会総会・全国学術総会
    • Related Report
      2022 Research-status Report
  • [Presentation] Cryptorchidism induces abnormal epigenetic and transcriptional signatures in spermatogonia2023

    • Author(s)
      尾野道男, Ivana Dockal, Uros Radovic, 大保和之, 富澤信一
    • Organizer
      第128回日本解剖学会総会・全国学術総会
    • Related Report
      2022 Research-status Report
  • [Remarks] 横浜市立大学医学部組織学

    • URL

      https://www-user.yokohama-cu.ac.jp/~finemorp/index.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] 横浜市立大学医学部組織学

    • URL

      http://www-user.yokohama-cu.ac.jp/~finemorp/index.html

    • Related Report
      2022 Research-status Report
  • [Remarks] 横浜市立大学医学部組織学

    • URL

      http://www-user.yokohama-cu.ac.jp/~finemorp/cn1/LfPIwBtTI.html

    • Related Report
      2021 Research-status Report
  • [Remarks] 横浜市立大学医学部組織学講座

    • URL

      http://www-user.yokohama-cu.ac.jp/~finemorp/index.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 横浜市立大学医学部組織学ホームページ

    • URL

      http://www-user.yokohama-cu.ac.jp/~finemorp/index.html

    • Related Report
      2019 Research-status Report

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Published: 2019-10-10   Modified: 2025-01-30  

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