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2022 Fiscal Year Final Research Report

Reconstruction of human immune system in mice

Research Project

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Project/Area Number 19H03147
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 42040:Laboratory animal science-related
Research InstitutionOsaka University

Principal Investigator

Takeda Junji  大阪大学, 微生物病研究所, 招へい教授 (50163407)

Co-Investigator(Kenkyū-buntansha) 近藤 玄  京都大学, 医生物学研究所, 教授 (40243258)
渡邊 仁美  京都大学, 医生物学研究所, 助教 (80624056)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords細胞融合 / ヒト化マウス / マウスES細胞
Outline of Final Research Achievements

To undersatnd human immune-system and perform in vivo experiment, we planed to generate humanized mice. It will be accomplished by exchange between human and mouse major histocompatibility complex (MHC) antigens genes. Since MHC genes encompass more than 3 Mb, the exchange is not feasible with standard methods.
This study inserted LoxPs into the boundaries of MHC genes and then human and mouse ES cells were fused. Theoretically human genome will be disappeared except clones bearing human MHC genes inserted into mouse genome. We are checking these clones.

Free Research Field

ゲノム編集

Academic Significance and Societal Importance of the Research Achievements

本研究が目指している目標が正しく達成できていれば、ヒト免疫系の評価が個体レベルでできることが期待される。例えば、ヒト腫瘍の維持(PDX patient-direved xenograft)は免疫系が欠損したマウスに行われる。本研究が目指しているヒト化マウスを用いれば、免疫系が機能した状態でヒト腫瘍を維持できる可能性がある。ただし、ヒト腫瘍とマウスで発現いるMHCを合致させる必要性がある。このシステムを用いれば、どのがん抗原が細胞障害性T細胞の標的になりうるかを容易に選択できる。

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Published: 2024-01-30  

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