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Elucidation of hematopoietic regulatory mechanisms via lipid balance

Research Project

Project/Area Number 20K08724
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54010:Hematology and medical oncology-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Kato Takayasu  筑波大学, 医学医療系, 講師 (20646591)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
KeywordsElovl6 / 白血病 / 造血幹細胞 / PI3K / CXCL12 / 急性骨髄性白血病 / 遊走 / ELOVL6 / 脂質の質 / 脂肪酸 / 脂肪酸の質 / ELOVL6
Outline of Research at the Start

本研究は‘脂肪酸の質’の変化が造血幹細胞および造血器腫瘍に与える影響を解析し、そのメカニズムを解明することで造血器腫瘍における新規治療法の開発を最終目的としている。
これまで造血幹細胞や造血器腫瘍において脂肪酸の量に着目した報告は多いが、‘脂肪酸の質’に注目した報告はほとんどない。
本研究では‘脂肪酸の質’の変化を引き起こすELOVL6ノックアウトマウスを用い、‘脂肪酸の質’の変化がどのようなメカニズムで造血幹細胞の生着能や白血病発症を制御するのかを解明することを目標とする。またヒト造血幹細胞およびヒト白血病検体を用いて‘脂肪酸の質’を解析し、マウス研究で得た知見がヒト臨床でも応用可能か検討する。

Outline of Final Research Achievements

This study examined whether altering intracellular fatty acid composition could be a novel treatment for acute myeloid leukemia (AML). Since ELOVL6, an enzyme that elongates the carbon number of fatty acids, affects fatty acid composition, this study used Elovl6-deficient (E6KO) mice to examine its effects on hematopoietic stem cells and AML. When E6KO bone marrow cells were transplanted into normal mice, no hematopoiesis was observed in the bone marrow. Furthermore, when leukemia genes were introduced into E6KO bone marrow cells and transplanted into wild-type mice, they did not develop AML. These findings indicate that the signals controlling cell motility are reduced by changes in fatty acid composition. These results indicate that altering fatty acid composition may lead to the treatment of AML.

Academic Significance and Societal Importance of the Research Achievements

急性骨髄性白血病(AML)の治癒率は向上しましたが、その恩恵を受けてきたのは主に若・壮年者です。しかしAMLを発症しやすい60歳代以降にも適用できる副作用の少ない新規治療法の開発が必須です。本研究ではElovl6による‘脂質の質’の変化が、造血幹細胞の生着とAMLの発症を制御していることを発見しました。すなわち、ELOVL6制御によって脂肪酸バランスを変化させることで、AML新規治療法につながる可能性を世界で初めて示しました。Elovl6を阻害する治療法では、副作用で造血抑制を生じる可能性は小さいと予想されます。今後‘脂肪酸の質’を標的とした新規白血病治療法開発への進展が期待されます。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2023 2022 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results) Remarks (1 results) Patent(Industrial Property Rights) (2 results)

  • [Journal Article] The fatty acid elongase Elovl6 is crucial for hematopoietic stem cell engraftment and leukemia propagation2023

    • Author(s)
      Kiyoki Yusuke、Kato Takayasu、Kito Sakura、Matsuzaka Takashi、Morioka Shin、Sasaki Junko、Makishima Kenichi、Sakamoto Tatsuhiro、Nishikii Hidekazu、Obara Naoshi、Sakata-Yanagimoto Mamiko、Sasaki Takehiko、Shimano Hitoshi、Chiba Shigeru
    • Journal Title

      Leukemia

      Volume: 37 Issue: 4 Pages: 910-913

    • DOI

      10.1038/s41375-023-01842-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Elongation of long-chain fatty acids is crucial for hematopoietic stem cell engraftment and leukemia propagation2023

    • Author(s)
      Takayasu Kato
    • Organizer
      第20回 幹細胞シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Elongation of Long-chain Fatty Acids is Crucial for Hematopoietic Stem Cell Engraftment and Leukemia Propagation.2023

    • Author(s)
      Takayasu KatoTakayasu Kato, Yusuke Kiyoki, Sakura Kito, Takashi Matsuzaka, Shin Morioka, Junko Sasaki, Tatsuhiro Sakamoto, Hidekazu Nishikii, Naoshi Obara, Mamiko Sakata-Yanagimoto,Takehiko Sasaki, Hitoshi Shimano and Shigeru Chiba
    • Organizer
      The 13th JSH International Symposium 2021
    • Related Report
      2022 Annual Research Report
  • [Presentation] ELOVL6 regulates engraftment of hematopoietic cells through the PI3K pathway2022

    • Author(s)
      Yusuke Kiyoki, Takayasu Kato, Sakura Kito, Takashi Matsuzaka, Shin Morioka, Junko Sasaki, Tatsuhiro Sakamoto, Hidekazu Nishikii, Naoshi Obara, Mamiko Sakata-Yanagimoto, Takehiko Sasaki, Hitoshi Shimano, Shigeru Chiba
    • Organizer
      第84回日本血液学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Elongation of Long-Chain Fatty Acids Is Crucial for Hematopoietic Stem Cell Engraftment and Leukemia Propagation2022

    • Author(s)
      Takayasu Kato, Yusuke Kiyoki, Sakura Kito, Takashi Matsuzaka, Shin Morioka, Junko Sasaki, Tatsuhiro Sakamoto, Hidekazu Nishikii, Naoshi Obara, Mamiko Sakata-Yanagimoto, Takehiko Sasaki, Hitoshi Shimano, Shigeru Chiba
    • Organizer
      64th ASH Annual Meeting and Exposition
    • Related Report
      2022 Annual Research Report
  • [Remarks] 細胞内の脂肪酸組成を調節することが白血病治療につながる可能性を発見

    • URL

      https://www.tsukuba.ac.jp/journal/medicine-health/20230316140000.html

    • Related Report
      2022 Annual Research Report
  • [Patent(Industrial Property Rights)] 造血器腫瘍の治療又は予防剤2022

    • Inventor(s)
      千葉 滋
    • Industrial Property Rights Holder
      千葉 滋
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-053374
    • Filing Date
      2022
    • Acquisition Date
      2022
    • Related Report
      2022 Annual Research Report
  • [Patent(Industrial Property Rights)] 造血器腫瘍の治療又は予防剤2022

    • Inventor(s)
      千葉滋、加藤貴康等
    • Industrial Property Rights Holder
      筑波大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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