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Understanding of the molecular bases of liberation of germ cells from Max-dependent suppression of meiotic onset

Research Project

Project/Area Number 19H03426
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionSaitama Medical University

Principal Investigator

Akihiko Okuda  埼玉医科大学, 医学部, 教授 (60201993)

Co-Investigator(Kenkyū-buntansha) 鈴木 歩  埼玉医科大学, 医学部, 講師 (80639708)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2019: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywords生殖細胞 / ES細胞 / 減数分裂 / 非典型的PRC1 / Max / PRC1 / Mga / 体細胞分裂
Outline of Research at the Start

私たちは、最近、ES細胞が、生殖細胞ではないにも関わらず減数分裂を開始する潜在能力を有し、そのES細胞における異所性の減数分裂は、専らMycのパートナー因子として知られているMaxがMycとは無関係に抑制していること、さらには、それと同じ分子メカニズムが生殖細胞における生理的な減数分裂の開始時期の制御にも関係していることを示唆するデータを得ている。本研究では、それらの研究成果を土台として、生殖細胞の減数分裂開始の為の分子基盤の全容の解明を目指す。

Outline of Final Research Achievements

We have previously demonstrated that PRC1.6, one of non-canonical subtypes of PRC1, functions as a strong blockade against meiosis. In this study, we have unequivocally demonstrated that inactivation of the function of PRC1.6 is a prerequisite stem for germ cells to onset meiosis. Moreover, we have demonstrated that there are at least two independent mechanisms are operating in germ in parallel to attenuate repressing activity of PRC1.6 for meiotic onset. One way is that germ cells reduces expression levels of Max gene that encodes one of PRC1.6 components substantially prior to meiotic onset. The other way is that germ cells produce anomalous protein from Mga gene locus that functions as a dominant negative regular against the construction of PRC1.6 via germ cell-specific alternative splicing. In addition, we have demonstrated that both of two DNA binding domains that Mga protein bears are independently involved in repressing rather distinct sets of meiosis-related genes each other.

Academic Significance and Societal Importance of the Research Achievements

哺乳動物の生殖細胞が体細胞分裂により活発に増殖するのを止めて減数分裂を開始する仕組みについてはほとんどわかっていない。本研究では、生殖細胞がPRC1.6複合体の機能を不活化することで減数分裂の開始を可能にしていることとの確定的な証拠を得たことに加え、PRC1.6の構成因子であるMax及びMgaをターゲットとした少なくとも2つの異なる機構により、生理的にPRC1.6の不活化が達成されていることを明らかにした。これらの成果により、減数分裂の開始機構についての研究を進展させたのみならず、男性不妊が危険因子の一つとされている精巣腫瘍の原因の解明の為の一つの基盤を提供できたと考えている。

Report

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

    (20 results)

All 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (7 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 7 results,  Open Access: 4 results) Presentation (9 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Int'l Joint Research] Fred Hutchison Cancer Research Center(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Fred Hutchison Cancer Research Center(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Fred Hutchison Cancer Research Center(米国)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Two DNA binding domains of MGA act in combination to suppress ectopic activation of meiosis-related genes in mouse embryonic stem cells2021

    • Author(s)
      Uranishi K, Hirasaki M, Kitamura Y, Mizuno Y, Nishimoto M, Suzuki A, Okuda A.
    • Journal Title

      Stem Cells

      Volume: 39(11) Issue: 11 Pages: 1435-1446

    • DOI

      10.1002/stem.3433

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Identification of germ cell-specific Mga variant mRNA that promotes meiosis via impediment of a non-canonical PRC12021

    • Author(s)
      Kitamura Y, Uranishi K, Hirasaki M, Nishimoto M, Suzuki A, Okuda A.
    • Journal Title

      Scientific Reports

      Volume: 11(1) Issue: 1 Pages: 9737-9737

    • DOI

      10.1038/s41598-021-89123-5

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Repression of germline genes by PRC1.6 and SETDB1 in the early embryo precedes DNA methylation-mediated silencing2021

    • Author(s)
      Mochizuki K, Sharif J, Shirane K, Uranishi K, Bogutz AB, Janssen SM, Suzuki A, Okuda A, Koseki H, Lorincz MC.
    • Journal Title

      Nature Communications

      Volume: 12(1) Issue: 1 Pages: 7020-7020

    • DOI

      10.1038/s41467-021-27345-x

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effects of Pparγ1 deletion on late-stage murine embryogenesis and cells that undergo endocycle2021

    • Author(s)
      Nakano Takanari、Aochi Hidekazu、Hirasaki Masataka、Takenaka Yasuhiro、Fujita Koji、Tamura Masaru、Soma Hiroaki、Kamezawa Hajime、Koizumi Takahiro、Shibuya Hirotoshi、Inomata Reiko、Okuda Akihiko、Murakoshi Takayuki、Shimada Akira、Inoue Ikuo
    • Journal Title

      Developmental Biology

      Volume: 478 Pages: 222-235

    • DOI

      10.1016/j.ydbio.2021.07.003

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Predicting the radiosensitivity of HPV-negative oropharyngeal squamous cell carcinoma using miR-130b2021

    • Author(s)
      Inoue Hitoshi、Hirasaki Masataka、Kogashiwa Yasunao、Kuba Kiyomi、Ebihara Yasuhiro、Nakahira Mitsuhiko、Sakai Akihiro、Okuda Akihiko、Sugasawa Masashi
    • Journal Title

      Acta Oto-Laryngologica

      Volume: 1 Issue: 6 Pages: 1-6

    • DOI

      10.1080/00016489.2021.1897160

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Transformation of normal cells by aberrant activation of YAP via cMyc with TEAD2019

    • Author(s)
      Nishimoto Masazumi、Uranishi Kousuke、Asaka Masamitsu N.、Suzuki Ayumu、Mizuno Yosuke、Hirasaki Masataka、Okuda Akihiko
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 10933-10933

    • DOI

      10.1038/s41598-019-47301-6

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification and characterization of splenic adherent cells forming densely‐packed colonies2019

    • Author(s)
      Hirasaki Masataka、Mizuno Yosuke、Ida Yui、Murakoshi Takayuki、Okuda Akihiko、Kotani Norihiro
    • Journal Title

      Development, Growth & Differentiation

      Volume: 印刷中 Issue: 4 Pages: 283-293

    • DOI

      10.1111/dgd.12605

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] MgaはbHLH領域を介してMeiosin-Stra8シグナルを制御することによって減数分裂移行を抑制する2021

    • Author(s)
      浦西洸介、北村友佳、鈴木 歩、平崎正孝、西本正純、奥田晶彦
    • Organizer
      第44回分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] MAXによるマウス生殖細胞の減数分裂開始制御機構2021

    • Author(s)
      鈴木 歩、浦西洸介、北村友佳、西本正純、奥田晶彦
    • Organizer
      第44回分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Identification of meiotic germ cell-specific Mga variant that functions as a negative regulator of non-canonical PRC1 leading to the promotion of meiotic onset2020

    • Author(s)
      Yuka Kitamura, Kousuke Uranishi, Masataka Hirasaki, Masazumi Nishimoto, Ayumu Suzuki, Akihiko Okuda
    • Organizer
      International Society of Stem Cell Research-annual meeting (ネット開催)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mammalian germ cell meiotic initiation is regulated by MAX2020

    • Author(s)
      鈴木 歩 , 浦西 洸介 , 北村 友佳 , 水野 洋介 , 西本 正純 , 奥田 晶彦
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Generation of meiotic germ cell-specific Mga splice variant for promoting meiotic onset via inactivation of non-canonical PRC12020

    • Author(s)
      北村 友佳 , 浦西 洸介 , 平崎 正孝, 西本 正純 , 鈴木 歩 , 奥田 晶彦
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 脾臓組織培養により出現するコロニー形成接着細胞の解析2019

    • Author(s)
      小谷典弘、平崎正孝、水野洋介、井田 唯、村越隆之、奥田晶彦
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Yapの異常な活性化による形質転換はYap/TEAD複合体によるcMyc遺伝子の転写亢進による2019

    • Author(s)
      西本正純、浦西洸介、浅賀正充、鈴木 歩、水野洋介、平崎正孝、奥田晶彦
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 生殖細胞特異的なMgaバリアントが減数分裂開始を誘導する2019

    • Author(s)
      北村友佳、浦西洸介、鈴木 歩、平崎正孝、西本正純、奥田晶彦
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] MaxノックアウトES細胞は哺乳類で減数分裂の開始機構を研究する有用なツールである2019

    • Author(s)
      鈴木 歩、浦西洸介、北村友佳、平崎正孝、西本正純、奥田晶彦
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Annual Research Report
  • [Remarks] ゲノム基礎医学

    • URL

      http://www.saitama-med.ac.jp/uinfo/biomedsci/

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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