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Molecular mechanisms through which SAMD9/9L mutants cause bone marrow failure

Research Project

Project/Area Number 21H02948
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 54010:Hematology and medical oncology-related
Research InstitutionHiroshima University

Principal Investigator

INABA Toshiya  広島大学, 原爆放射線医科学研究所, 教授 (60281292)

Co-Investigator(Kenkyū-buntansha) 長町 安希子  広島大学, 原爆放射線医科学研究所, 助教 (20585153)
金井 昭教  東京大学, 大学院新領域創成科学研究科, 特任准教授 (60549567)
松井 啓隆  熊本大学, 大学院生命科学研究部(医), 教授 (60379849)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2022: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2021: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
KeywordsSAMD9/SAMD9L症候群 / 骨髄異形成症候群 / モノソミー7 / 先天性造血不全症候群 / TGFbeta / MDS / モノソミー7 / Samd9/9L / Samd9/9L症候群 / monosomy 7 / Monosomo-7 / Samd9/9L / 造血障害 / インターフェロン
Outline of Research at the Start

骨髄異形成症候群(MDS)は、かつて「不応性貧血」とも「くすぶり型白血病」とも呼ばれたことが端的に示すように、造血不全と腫瘍の両方の性質をあわせ持つ、難解な疾患である。MDS抑制遺伝子Samd9とSamd9L(以下Samd9/9L)は、インターフェロン(IFN)誘導因子をコードするが、その機能亢進型点変異(mut)は先天性骨髄不全症を主徴とする「Samd9/9L症候群」を起こし、経過中に変異側の7qが欠落してMDSを多発する。本研究では、Samd9/9Lの機能解析を通じて、MDS発症の分子メカニズムを解明する。

Outline of Final Research Achievements

Samd9 and Samd9L (hereafter referred to as Samd9/9L) are genes known to suppress AML and myelodysplastic syndromes (MDS) located on chromosome 7q. Recent studies have revealed that gain-of-function mutations in SAMD9/9L lead to multiple organ failure, including inherited bone marrow failure syndromes now designated as "SAMD9/9L syndromes". Through our research, we have developed mouse models lacking the Samd9L gene or carrying a mutated Samd9L, which accurately mimic 7q-AML/MDS or SAMD9/9L syndromes. In this study, we investigated hematopoietic cells isolated from these mice and discovered that the mutated Samd9L disturbs TGFβ signaling pathways through previously unidentified mechanisms, contributing to the development of SAMD9/9L-related human diseases.

Academic Significance and Societal Importance of the Research Achievements

骨髄異形成症候群(MDS)は、かつて「不応性貧血」「くすぶり型白血病」と呼ばれていたことが端的に示すように、造血不全(貧血)と腫瘍の両方の性格を持つ難治性疾患である。SAMD9/9L遺伝子は、その欠損がMDSの原因となると同時に、その機能亢進が造血不全を引き起こすことがヒトとマウスで確認されている上、造血系以外のさまざまな臓器の発生過程、さらにはPOXウイルス防御にも大きな役割を果たす。SAMD9/9Lの生化学的機能は十分に解明されていない中で、TGFbシグナルに対する未知の干渉経路が明らかとなり、上記疾患の治療に発展しうる成果である。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (12 results)

All 2023 2022 2021

All Journal Article (11 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 11 results,  Open Access: 11 results) Presentation (1 results)

  • [Journal Article] MOZ/ENL complex is a recruiting factor of leukemic AF10 fusion proteins2023

    • Author(s)
      Komata Yosuke、Kanai Akinori、Maeda Takahiro、Inaba Toshiya、Yokoyama Akihiko
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 1-17

    • DOI

      10.1038/s41467-023-37712-5

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ribosome profiling analysis reveals the roles of DDX41 in translational regulation2023

    • Author(s)
      Tungalag Saruul、Shinriki Satoru、Hirayama Mayumi、Nagamachi Akiko、Kanai Akinori、Inaba Toshiya、Matsui Hirotaka
    • Journal Title

      International Journal of Hematology

      Volume: - Issue: 6 Pages: 1-13

    • DOI

      10.1007/s12185-023-03558-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mouse models of hematological diseases using genome editing technology2022

    • Author(s)
      長町 安希子、稲葉 俊哉
    • Journal Title

      Rinsho Ketsueki

      Volume: 63 Issue: 11 Pages: 1551-1557

    • DOI

      10.11406/rinketsu.63.1551

    • ISSN
      0485-1439, 1882-0824
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] DDX41 coordinates RNA splicing and transcriptional elongation to prevent DNA replication stress in hematopoietic cells2022

    • Author(s)
      Satoru Shinriki;Mayumi Hirayama;Akiko Nagamachi;Akihiko Yokoyama;Takeshi Kawamura;Akinori Kanai;Hidehiko Kawai;Junichi Iwakiri;Rin Liu;Manabu Maeshiro;Saruul Tungalag;Masayoshi Tasaki;Mitsuharu Ueda;Kazuhito Tomizawa;Naoyuki Kataoka;Takashi Ideue;Yutaka Suzuki;Kiyoshi Asai;Tokio Tani;Toshiya Inaba;Hirotaka Matsui
    • Journal Title

      Leukemia

      Volume: 36 Issue: 11 Pages: 2605-2620

    • DOI

      10.1038/s41375-022-01708-9

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Multi-omics analysis defines highly refractory RAS burdened immature subgroup of infant acute lymphoblastic leukemia2022

    • Author(s)
      Tomoya Isobe, Masatoshi Takagi, Aiko Sato-Otsubo, et al. (57人中28番目)
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 4501-4501

    • DOI

      10.1038/s41467-022-32266-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Aberrant <i>EVI1</i> splicing contributes to <i>EVI1</i>-rearranged leukemia2022

    • Author(s)
      Tanaka Atsushi、Kunimoto Hiroyoshi et al.
    • Journal Title

      Blood

      Volume: 140 Issue: 8 Pages: 875-888

    • DOI

      10.1182/blood.2021015325

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Design, synthesis and biological evaluation of 2-pyrrolone derivatives as radioprotectors2022

    • Author(s)
      Satoh Hidetoshi、Ochi Shintaro、Mizuno Kosuke、Saga Yutaka、Ujita Shohei、Toyoda Miyu、Nishiyama Yuichi、Tada Kasumi、Matsushita Yosuke、Deguchi Yuichi、Suzuki Keiji、Tanaka Yoshimasa、Ueda Hiroshi、Inaba Toshiya、Hosoi Yoshio、Morita Akinori、Aoki Shin
    • Journal Title

      Bioorganic & Medicinal Chemistry

      Volume: 67 Pages: 116764-116764

    • DOI

      10.1016/j.bmc.2022.116764

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Glucocorticoid receptor gene mutations confer glucocorticoid resistance in B-cell precursor acute lymphoblastic leukemia2022

    • Author(s)
      Tamai Minori、Kasai Shin、Akahane Koshi、Thu Thao Nguyen、Kagami Keiko、Komatsu Chiaki、Abe Masako、Watanabe Atsushi、Goi Kumiko、Miyake Kunio、Inaba Toshiya、Takita Junko、Goto Hiroaki、Minegishi Masayoshi、Iwamoto Shotaro、Sugita Kanji、Inukai Takeshi
    • Journal Title

      The Journal of Steroid Biochemistry and Molecular Biology

      Volume: 218 Pages: 106068-106068

    • DOI

      10.1016/j.jsbmb.2022.106068

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multi-organ failure with abnormal receptor metabolism in mice mimicking Samd9/9L syndromes2021

    • Author(s)
      Nagamachi A, Kanai A, Nakamura M, Okuda H, Yokoyama A, Shinriki S, Matsui H, Inaba T.
    • Journal Title

      J Clin Invest

      Volume: 131 Issue: 4 Pages: 1-16

    • DOI

      10.1172/jci140147

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Novel RNA Synthesis Inhibitor, STK160830, Has Negligible DNA-Intercalating Activity for Triggering A p53 Response, and Can Inhibit p53-Dependent Apoptosis2021

    • Author(s)
      Morita Akinori、Ochi Shintaro、Satoh Hidetoshi、Ujita Shohei、Matsushita Yosuke、Tada Kasumi、Toyoda Mihiro、Nishiyama Yuichi、Mizuno Kosuke、Deguchi Yuichi、Suzuki Keiji、Tanaka Yoshimasa、Ueda Hiroshi、Inaba Toshiya、Hosoi Yoshio、Aoki Shin
    • Journal Title

      Life

      Volume: 11 Issue: 10 Pages: 1087-1087

    • DOI

      10.3390/life11101087

    • NAID

      120007164908

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Revertant somatic mosaicism as a cause of cancer2021

    • Author(s)
      Inaba Toshiya、Nagamachi Akiko
    • Journal Title

      Cancer Science

      Volume: 112 Issue: 4 Pages: 1383-1389

    • DOI

      10.1111/cas.14852

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 骨髄機能低下をもたらすSamd9/9L変異体によるTGFbシグナル撹乱と静止期造血幹細胞の減少2023

    • Author(s)
      長町安希子
    • Organizer
      日本血液学会総会
    • Related Report
      2023 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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