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ポリコーム群遺伝子Ezh2の造血腫瘍発症におけるメカニズム解析

Research Project

Project/Area Number 14J40024
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Hematology
Research InstitutionChiba University

Principal Investigator

望月 牧子  千葉大学, 医学研究院, 特別研究員(RPD)

Project Period (FY) 2014-04-25 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsEzh2 / H3K27me3 / H3K36me2/3 / Mmset / HSC / ポリコーム群遺伝子 / 造血器腫瘍 / 骨髄異形成症候群 / 骨髄異型性症候群
Outline of Annual Research Achievements

EZH2の機能欠失による骨髄球性腫瘍発症のメカニズムを明らかにするため、Ezh2コンディショナル欠損マウス骨髄を用いてレシピエントマウスに移植後にEzh2を欠損させることにより、造血特異的Ezh2欠損マウスを作成し、その造血の長期観察を行った。Ezh2欠損後10カ月前後でマウスは骨髄球系腫瘍を発症した。MDS/MPN様病態が多く、次いでMDSが認められた。この結果は、患者検体で同定されるEZH2変異の頻度と合致するものであった。
Ezh2の機能欠損による骨髄球性腫瘍発症の分子メカニズムを理解するため、Ezh2欠損MDSマウスのLSK細胞を用いて遺伝子発現解析を行った。Ezh2欠損に伴うH3K27me3の減少によって多くのPRC2標的遺伝子発現の脱抑制が認められたが、造血幹細胞におけるBivalent遺伝子群はMDS発症後に再抑制されることが認められた。Bivalent関連遺伝子は分化制御遺伝子を多く含むこと、またEzh1を含むPRC2複合体 (Ezh1-PRC2) が修飾に寄与していることが示されていることから、Ezh2欠損を部分的にEzh1が代償しているものと予測し、H3K27me3のChIP-Sequenceを行ったところ、Ezh2欠損により一度減少したH3K27me3が多くのPRC2表的遺伝子、特にBivalent遺伝子群プロモーターで部分的あるいは完全に回復することが確認された。さらにEzh1/Ezh2ダブルノックアウトマウスを作成したところ、長期再構築能が完全に欠失していることが明らかになった。したがって、Ezh2の機能欠損による造血器腫瘍の形成には造血幹・前駆細胞におけるEzh1の発現が必須であり、Ezh2の機能不全状態の一部をEzh1が代償的に補完することが示された。

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • Research Products

    (17 results)

All 2017 2016 2015 2014

All Journal Article (8 results) (of which Peer Reviewed: 7 results,  Acknowledgement Compliant: 2 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] The loss of Ezh2 drives the pathogenesis of myelofibrosis and sensitizes tumor-initiating cells to bromodomain inhibition.2016

    • Author(s)
      Sashida G, Wang C, Tomioka T, Oshima M, Aoyama K, Kanai A, Mochizuki-Kashio M, Harada H, Shimoda K, and Iwama A.
    • Journal Title

      J Exp Med

      Volume: 25;213(8) Pages: 1459-1477

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ezh2 regulates the Lin28/let-7 pathway to re- strict activation of fetal gene signature in adult hematopoietic stem cells.2016

    • Author(s)
      Oshima M, Hasegawa N, Mochizuki-Kashio M, Muto T, Miyagi S, Koide S, Yabata S, Wendt GR, Saraya A, Wang C, Shimoda K, Suzuki Y, Iwama A.
    • Journal Title

      Exp Hematol.

      Volume: 44(4) Pages: 282-296

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ezh2 regulates the Lin28/let-7 pathway to restrict activation of fetal gene signature in adult hematopoietic stem cells.2016

    • Author(s)
      Oshima M, Hasegawa N, Mochizuki-Kashio M, Muto T, Miyagi S, Koide S, Yabata S, Wendt G, Saraya A, Wang C, Shimoda K, Suzuki Y, Iwama A.
    • Journal Title

      Exp Hematol

      Volume: 44(4) Issue: 4 Pages: 282-296

    • DOI

      10.1016/j.exphem.2015.12.009

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ezh2 loss in hematopoietic stem cells predisposes mice to develop heterogeneous malignancies in an Ezh1-dependent manner.2015

    • Author(s)
      Mochizuki-Kashio M, Aoyama K, Sashida G, Oshima M, Tomioka T, Muto T, Wang C, Iwama A.
    • Journal Title

      Blood

      Volume: 126 Issue: 10 Pages: 1172-83

    • DOI

      10.1182/blood-2015-03-634428

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Non-Lethal Ionizing Radiation Promotes Aging-Like Phenotypic Changes of Human Hematopoietic Stem and Progenitor Cells in Humanized Mice.2015

    • Author(s)
      Wang C, Oshima M, Sashida G, Tomioka T, Hasegawa N, Mochizuki-Kashio M, Nakajima-Takagi Y, Kusunoki Y, Kyoizumi S, Imai K, Nakachi K, Iwama A.
    • Journal Title

      PLoS One

      Volume: 10 Issue: 7 Pages: e0132041-e0132041

    • DOI

      10.1371/journal.pone.0132041

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Compromised hematopoiesis and increased DNA damage following non-lethal ionizing radiation of a human hematopoietic system reconstituted in immunodeficient mice2015

    • Author(s)
      Wang C, Nakamura S, Oshima M, Mochizuki-Kashio M, Nakajima-Takagi Y, Osawa M, Kusunoki Y, Kyoizumi S, Imai K, Nakachi K, Iwama A.
    • Journal Title

      Int J Radiat Biol

      Volume: 91(8) Issue: 8 Pages: 687-687

    • DOI

      10.3109/09553002.2015.1047990

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ezh2 loss promotes development of myelodysplastic syndrome but attenuates its predisposition to leukaemic transformation.2014

    • Author(s)
      Sashida G, Harada H, Matsui H, Oshima M, Yui M, Harada Y, Tanaka S, Mochizuki-Kashio M, Wang C, Saraya A, Muto T, Hayashi Y, Suzuki K, Nakajima H, Inaba T, Koseki H, Huang G, Kitamura T, Iwama A.
    • Journal Title

      Nature Communication

      Volume: 5 Pages: 1-14

    • Related Report
      2014 Annual Research Report
  • [Journal Article] Histone acetylation mediated by Brd1 is crucial for Cd8 gene activation during early thymocyte development.2014

    • Author(s)
      Mishima Y, Wang C, Miyagi S, Saraya A, Hosokawa H, Mochizuki-Kashio M, Nakajima-Takagi Y, Koide S, Negishi M, Sashida G, Naito T, Ishikura T, Onodera A, Nakayama T, Tenen DG, Yamaguchi N, Koseki H, Taniuchi I, Iwama A.
    • Journal Title

      Nature Communication

      Volume: 5 Pages: 1-11

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] メチル化転移酵素Nsd2の機能の解明2017

    • Author(s)
      望月(樫尾)牧子、横田貴文、藤木亮次、杉尾ジュリー、鈴木慈、 前田亮、岩間厚志、浦聖恵
    • Organizer
      染色体ワークショップ
    • Place of Presentation
      かずさアカデミアホール202B会議場(千葉県・木更津市)
    • Year and Date
      2017-01-11
    • Related Report
      2016 Annual Research Report
  • [Presentation] ヒストンH3K36転移酵素Whsc1の造血幹細胞における機能の解明2016

    • Author(s)
      望月(樫尾)牧子、岩間厚志、浦聖恵
    • Organizer
      転写サイクル班会議2016
    • Place of Presentation
      松島一の坊(宮城県・松島町)
    • Year and Date
      2016-09-05
    • Related Report
      2016 Annual Research Report
  • [Presentation] Ezh2 loss in hematopoietic stem cells predisposes mice to develop heterogeneous malignancies in an Eh1-dependent manner2016

    • Author(s)
      Makiko Mochizuki-Kashio, Kazumasa Aoyama, Goro Sashida, Motohiko Oshima, Changshan Wang, Atushi Iwama
    • Organizer
      The 5th JCA-AACR Special Joint Conference
    • Place of Presentation
      Tokyo Bay Maihama Hotel Club Resort(千葉県・浦安市)
    • Year and Date
      2016-07-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] Ezh2 loss in hematopoietic stem cells predisposes mice to develop heterogeneous malignancies in an Eh1-dependent manner2016

    • Author(s)
      Makiko Mochizuki-Kashio, Kazumasa Aoyama, Goro Sashida, Motohiko Oshima, Changshan Wang, Atushi Iwama
    • Organizer
      幹細胞シンポジウム
    • Place of Presentation
      淡路夢舞台国際会議場(兵庫県・淡路市)
    • Year and Date
      2016-05-21
    • Related Report
      2016 Annual Research Report
  • [Presentation] Ezh2の機能欠損による造血器腫瘍の形成には造血幹・前駆細胞におけるEzh1の発現が必須である2016

    • Author(s)
      樫尾(望月) 牧子、青山 和正、指田 吾郎、大島 基彦、王 長山、 岩間 厚志
    • Organizer
      麒麟塾
    • Place of Presentation
      コクヨホール(東京都・品川区)
    • Related Report
      2016 Annual Research Report
  • [Presentation] Comprehensive analysis of histone H3 methylation on lysine 27 and 36 during Hematopoiesis2015

    • Author(s)
      Makiko Mochizuki-Kashio, Kazumasa Aoyama, Goro Sashida, Motohiko Oshima, Takahisa Tomioka, Tomoya Muto, Changshan Wang, Kiyoe Ura, Atsushi Iwama
    • Organizer
      International Symposium on Chromatin Stracture, Dynamics, and Function
    • Place of Presentation
      淡路夢舞台国際会議場(兵庫県淡路市)
    • Year and Date
      2015-08-23
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] H3K36メチル化酵素Whsc1はプログラムされたDNA損傷修復を担う2015

    • Author(s)
      樫尾(望月) 牧子
    • Organizer
      第九回日本エピジェネティクス研究会年会
    • Place of Presentation
      学術総合センター(東京都千代田区)
    • Year and Date
      2015-05-25
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ezh2 loss in hematopoietic stem cells predisposes mice to develop heterogeneous hematological2015

    • Author(s)
      Makiko Mochizuki-Kashio, Changshan Wang, Goro Sashida, Motohiko Oshima, Takahisa Tomioka, Atsushi Iwama
    • Organizer
      THE 13TH INTERNATIONAL SYMPOSIUM ON MYELODYSPLASTIC SYNDROMES
    • Place of Presentation
      Washington, D.C. (U.S.A.)
    • Year and Date
      2015-04-29 – 2015-05-02
    • Related Report
      2014 Annual Research Report
  • [Presentation] Ezh2 loss in hematopoietic stem cells predisposes mice to develop heterogeneous hematological malignancies2015

    • Author(s)
      Makiko Mochizuki-Kashio, Changshan Wang, Goro Sashida, Motohiko Oshima, Takahisa Tomioka1, Atsushi Iwama
    • Organizer
      THE 13TH INTERNATIONAL SYMPOSIUM ON MYELODYSPLASTIC SYNDROMES
    • Place of Presentation
      Washington, D.C.(アメリカ)
    • Year and Date
      2015-04-29
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research

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Published: 2015-01-22   Modified: 2024-03-26  

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