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Dissection of the regulatory mechanisms of male germ stem cell by DNA methylation mediated through transcription factors

Research Project

Project/Area Number 15K08156
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field General anatomy (including histology/embryology)
Research InstitutionYokohama City University

Principal Investigator

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

Research Collaborator Matsumoto Naomichi  
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords生殖細胞 / 幹細胞 / エピゲノム / 細胞・組織 / 解剖学 / エピジェネティクス / 生殖 / 分化
Outline of Final Research Achievements

We previously identified the epigenetic checkpoint where various epigenetic factors and modifications are changed during male germ stem cell differentiation. In this study, we identified the seed enhancers that showed drastic changes during the male germ stem cell differentiation. We also observed chromosomal localization of the genomes where DNA methylation levels were up-regulated during the stem cell differentiation.

Academic Significance and Societal Importance of the Research Achievements

精子を、個体の一生涯作り続ける元となる細胞は、精子幹細胞と呼ばれている。精子幹細胞が分裂する際の制御は、サイトカインなど、シグナル分子を介した研究が盛んである。しかし、本研究では、まったく異なる視点となるエピジェネティクスの仕組みから、精子幹細胞を俯瞰した。特に、既に取得しているDNAメチル化模様の結果に、新たにEnhancerやSuper enhancerのヒストン修飾であるH3K4me1, H3K27acの修飾部位をゲノムワイドに決定する共に、幹細胞から分化開始時に大きく変化する部位が核内でどのように位置を変えるのか観察した。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (20 results)

All 2019 2018 2017 2016 2015 Other

All Int'l Joint Research (4 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 2 results) Remarks (2 results)

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

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ドレスデン工科大学(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] ドレスデン工科大学(ドイツ)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Friedrich Miescher Institute(スイス)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Kmt2b conveys monovalent and bivalent H3K4me3 in spermatogonial stem cells at germline and embryonic promoters2018

    • Author(s)
      Tomizawa S, Kobayashi Y, Shirakawa T, Watanabe K, Mizoguchi K, Hoshi I, Nakajima K, Nakabayashi J, Singh S, Dahl A, Alexopoulou D, Seki M, Suzuki Y, Royo H, Peters6, A. H.F.M, Anastassiadis K, Stewart A.F. and Ohbo K
    • Journal Title

      Development

      Volume: 145 Issue: 23

    • DOI

      10.1242/dev.169102

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] EPC1/TIP60-Mediated Histone Acetylation Facilitates Spermiogenesis in Mice2017

    • Author(s)
      Dong Yixin、Isono Kyo-ichi、Ohbo Kazuyuki、Endo Takaho A.、Ohara Osamu、Maekawa Mamiko、Toyama Yoshiro、Ito Chizuru、Toshimori Kiyotaka、Helin Kristian、Ogonuki Narumi、Inoue Kimiko、Ogura Atsuo、Yamagata Kazutsune、Kitabayashi Issay、Koseki Haruhiko
    • Journal Title

      Molecular and Cellular Biology

      Volume: 37 Issue: 19

    • DOI

      10.1128/mcb.00082-17

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] エピジェネティックな機構を介した精子発生制御メカニズムの解析2019

    • Author(s)
      小林裕貴、尾野道男、溝口敬太、夏目幸治、富澤信一、河越龍方、水木信久、小倉淳郎、大保和之
    • Organizer
      第124回日本解剖学会総会・全国学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 左総頸動脈に関連した大動脈弓分岐変異の2例2019

    • Author(s)
      阿部竜太、大西修平、長谷川広大、加藤伸忠、渡辺武俊、小見奈子、竹田智香、鶴雄斗、朝倉一、棚田桃加、尾野道男、氏 斗、羽鳥尚寛、臼井淳之、泉敏治、島田和幸、大保和之
    • Organizer
      第124回日本解剖学会総会・全国学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Kmt2b(H3K4メチル化酵素)遺伝子欠損マウスにおける精細管の微細形態2018

    • Author(s)
      尾野道男、小林裕貴、富澤信一、大保和之
    • Organizer
      第123回日本解剖学会総会・全国学術総会
    • Related Report
      2017 Research-status Report
  • [Presentation] Role of a mammalian histone H3K4me3 methyltransferase Kmt2b for spermatogonial stem cell differentiation and migration2018

    • Author(s)
      Kobayashi Y, Tomizawa SI, Ono M, Ohbo K.
    • Organizer
      第123回日本解剖学会総会・全国学術総会
    • Related Report
      2017 Research-status Report
  • [Presentation] Role and priming activity of Kmt2b for the spermatogonial stem cell epigenome2018

    • Author(s)
      Tomizawa SI,Kobayashi Y, Shirakawa T, Hoshi I, Nakajima K, Royo H, Peters A.H.F.M, Anastassiadis K, Stewart A.F, Ohbo K.
    • Organizer
      第123回日本解剖学会総会・全国学術総会
    • Related Report
      2017 Research-status Report
  • [Presentation] ヒストンメチル化酵素による精巣幹細胞分化制御とその意味2017

    • Author(s)
      大保和之
    • Organizer
      第122回日本解剖学会総会・全国学術集会
    • Place of Presentation
      長崎大学坂本キャンパス(長崎市)
    • Year and Date
      2017-03-28
    • Related Report
      2016 Research-status Report
  • [Presentation] Mice deficient in Wfdc2 exhibit a respiratory distress syndrome-like phenotype2017

    • Author(s)
      Ohbo K, Nakajima K, Hoshi I, Nakamura M, Tomizawa S.
    • Organizer
      Gordon Research Conference - Lung Development, Injury and Repair
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Kmt2b is required for spermatogenesis through both bivalent and monovalent priming of the spermatogonial stem cell epigenome2017

    • Author(s)
      Tomizawa S, Kobayashi Y, Shirakawa T, Hoshi I, Nakajima K, Royo H, Peters A. HFM, Anastassiadis K, Stewart AF, Ohbo K.
    • Organizer
      EMBO Conference: Nuclear structure and dynamics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 精子幹細胞分化に関わるゲノム修飾機構の解析2016

    • Author(s)
      大保和之
    • Organizer
      第57回日本組織細胞化学会総会・学術集会
    • Place of Presentation
      杏林大学井の頭キャンパス(東京都三鷹市)
    • Year and Date
      2016-09-03
    • Related Report
      2016 Research-status Report
  • [Presentation] Role of histone methyltransferase Mll2 for male germ cell differentiation.2016

    • Author(s)
      Shin-ichi Tomizawa, Takayuki Shirakawa, Andreas Dahl, Dimitra Alexopoulou, Konstantinos Anastassiadis, A. Francis Stewart Kazuyuki Ohbo.
    • Organizer
      Gordon Research Conference, Chromatin Structure and Function.
    • Place of Presentation
      Les Diablerets Conference Center (Les Diablerets, Switzerland)
    • Year and Date
      2016-05-22
    • Related Report
      2016 Research-status Report
  • [Presentation] ゲノム修飾からみた成体精巣幹細胞分化機構2016

    • Author(s)
      大保和之
    • Organizer
      第121回日本解剖学会総会・全国学術集会
    • Place of Presentation
      ビッグパレットふくしま(福島県郡山市)
    • Year and Date
      2016-03-28
    • Related Report
      2015 Research-status Report
  • [Presentation] エピジェネティクスの視点から見た精原幹細胞分化2015

    • Author(s)
      大保和之
    • Organizer
      第60回日本生殖医学会
    • Place of Presentation
      パシフィコ横浜(神奈川県横浜市)
    • Year and Date
      2015-04-27
    • Related Report
      2015 Research-status Report
  • [Remarks] 横浜市立大学医学部組織学・微細形態学(旧第一解剖)

    • URL

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

    • Related Report
      2018 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
      2017 Research-status Report

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Published: 2015-04-16   Modified: 2020-03-30  

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