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Establishment of an in vivo differentiation system for liver cells using a fetal liver-deficient mouse model

Research Project

Project/Area Number 16K18403
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Laboratory animal science
Research InstitutionCentral Institute for Experimental Animals

Principal Investigator

Yuichiro Higuchi  公益財団法人実験動物中央研究所, 実験動物研究部, 研究員 (00596281)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords肝臓 / 肝芽細胞 / Ex-utero法 / Afp-TKマウス / 胎仔肝 / Ex utero法 / TK-NOGマウス / 肝臓形成不全 / 胚盤胞補完 / ヒト化肝臓マウス / 胚盤補完法 / in vivo分化誘導 / 多能性幹細胞
Outline of Final Research Achievements

In this study, I attempted to establish in vivo differentiation of mature hepatocytes, which can reconstitute the liver in a liver-injured mouse model, using human pluripotent stem cells. I generated hepatoblast-injured model Afp-TK mice. Afp-TK mice express herpes virus thymidine kinase 1 (TK) under the control of the alpha-fetoprotein (Afp) promoter. Hepatoblast degeneration can be induced by administration of gancyclovir. I transplanted mouse hepatoblasts into the fetal liver of Afp-TK mice with induced hepatoblast degeneration. The damaged livers were complemented by the transplanted hepatoblasts. This observation suggests that the liver complementation system of Afp-TK mice is applicable for hepatoblasts derived from human pluripotent stem cells.

Academic Significance and Societal Importance of the Research Achievements

肝臓の主要構成要素である肝細胞は、新しい薬の効果を検証するための非常に重要なツールである。現在、ヒトの肝細胞はドナーの了承を得て提供されるものに限られており、個人差や有限性などに課題を抱えている。これらを克服しうるソースとして期待されるのが、ヒトiPS細胞より作製される肝細胞である。本研究では薬物の投与依存的に、胎仔期の肝臓に障害を誘導できる遺伝子改変マウスを新たに作製した。その肝臓に未熟な肝臓細胞を移植したところ、障害誘導された肝臓が移植細胞によって補完される現象を確認した。この技術をヒトiPS細胞に応用することで、より成熟度の高い肝実質細胞を作製できるようになるものと期待される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (3 results)

All 2018 2017 2016

All Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] DIFFERENTIATION OF BI-POTENT HEPATOBLASTS INTO HEPATOCYTES AND CHOLANGIOCYTES IN THE HEPATOBLAST-DEPLETED FETAL LIVER OF AN AFP-HSVTK TRANSGENIC MOUSE2018

    • Author(s)
      Yuichiro Higuchi
    • Organizer
      ISSCR 2018 Annual meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dual reconstitution model of the liver and hematopoietic system using mouse fetal liver cells2017

    • Author(s)
      Yuichiro Higuchi
    • Organizer
      ISSCR 2017 Annual meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] HepaRP3細胞によるヒト化肝臓マウスの作製2016

    • Author(s)
      樋口裕一郎
    • Organizer
      第63回日本実験動物学会総会
    • Place of Presentation
      ミューザ川崎
    • Year and Date
      2016-05-18
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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