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Investigation of molecular biology of CNS leukemia

Research Project

Project/Area Number 20H03653
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kato Motohiro  東京大学, 医学部附属病院, 教授 (40708690)

Co-Investigator(Kenkyū-buntansha) 内山 徹  国立研究開発法人国立成育医療研究センター, 成育遺伝研究部, 室長 (10436107)
加藤 格  京都大学, 医学研究科, 助教 (10610454)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2020: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Keywords癌 / 白血病
Outline of Research at the Start

小児白血病の治療成績は向上したが、中枢神経系からの再発が治療開発における課題と
して残されている。この「白血病細胞の中枢神経系での生存を可能にする分子遺伝学的基盤は何か?」という問いに答えるべく、本研究では、骨髄外に再発・浸潤した白血病の検体のゲノム解析を通じ、その分子病態を明らかにする。

Outline of Final Research Achievements

In this study, whole exome sequencing was performed in 11 patients with extramedullary relapsed ALL to elucidate the molecular mechanisms of treatment resistance leading to extramedullary recurrence. The genomic profile at relapse differed from that at initial disease, suggesting that minor clones at diagnosis contributed to the recurrence. In addition, 5 of the 11 were found to have abnormalities in gene X, and high relapse rate of patients with this alteration was reproduced in the validation cohort. The results confirm that suppression of gene X function results in rapid DNA repair and may favor survival of leukemic cells against chemotherapy-induced DNA damage.

Academic Significance and Societal Importance of the Research Achievements

急性リンパ性白血病の治療成績は向上し、免疫療法薬剤などの開発により骨髄再発のコントロールは可能になった。一方で、依然として中枢神経再発に対する治療開発は限られており、頭蓋照射などは晩期合併症の高リスクとなる。本研究の成果により、中枢神経再発の機序が明らかになり、再発リスクの特定だけでなく、中枢神経再発の機序を直接の標的とした治療開発につながることが期待される。

Report

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

    (4 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (1 results) (of which Invited: 1 results)

  • [Journal Article] Genetic features of B‐cell lymphoblastic lymphoma with TCF3‐PBX12021

    • Author(s)
      Shirai Ryota、Ogawa Seishi, et al.
    • Journal Title

      Cancer Reports

      Volume: - Issue: 9

    • DOI

      10.1002/cnr2.1559

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Genomic analysis of two rare cases of pediatric Ph‐positive T‐ALL2021

    • Author(s)
      Sato‐Otsubo Aiko、Osumi Tomoo、Yoshida Masanori、Iguchi Akihiro、Fukushima Takashi、Nakabayashi Kazuhiko、Ogawa Seishi、Hata Kenichiro、Kato Motohiro
    • Journal Title

      Pediatric Blood Cancer

      Volume: 69 Issue: 3

    • DOI

      10.1002/pbc.29427

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Prevalence of germline GATA2 and SAMD9/9L variants in paediatric haematological disorders with monosomy 72020

    • Author(s)
      Yoshida, M. Tanase-Nakao, K. Shima, H. Shirai, R. Yoshida, K. Osumi, T. Deguchi, T. Mori, M. Arakawa, Y. Takagi, M. Miyamura, T. Sakaguchi, K. Toyoda, H. Ishida, H. Sakata, N. Imamura, T. Kawahara, Y. Morimoto, A. Koike, T. Yagasaki, H. Ito, S. Tomizawa, D. Kiyokawa, N. Narumi, S. Kato, M.
    • Journal Title

      British Journal of Haematology

      Volume: 191 Issue: 5 Pages: 835-843

    • DOI

      10.1111/bjh.17006

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 小児白血病の薬剤耐性の分子病態2022

    • Author(s)
      佐藤亜以子
    • Organizer
      第81回日本癌学会
    • Related Report
      2022 Annual Research Report
    • Invited

URL: 

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

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