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Updated: May 7, 2026

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Establishment and Genetic Manipulation of Murine Hepatocyte Organoids
Published on: February 12, 2022
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ヒトの多能幹細胞からの多領域性肝臓オーガノイド
Hasan Al Reza1,2, Connie Santangelo2,3, Kentaro Iwasawa2,3
1Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Nature
|April 16, 2025
まとめ
研究者は新しい肝臓器官モデルを作成し,肝臓の領域構造をインビトロで複製しました. この画期的な発見は 肝臓の発達や 代謝のホメオスタシス 疾患の研究に 新たな基盤を提供してくれます
科学分野:
- ヘパトロジーと再生医療
- 幹細胞生物学
- オルガノイド技術
背景:
- 肝臓の機能に不可欠なポータル・セントラル軸に沿って,異なる肝臓細胞亜集団が空間的に分離されています.
- 現存する in vitro モデルは,このゾナルの肝臓構造を複製していません.
- アスコルベートやビリルビンのような生物活性分子は,肝細胞のゾナルの運命を指揮することに関与しています.
研究 の 目的:
- 人間の誘発性多能幹細胞を用いた,自己組み立て可能な,ゾーン特有の肝臓器官モデルを開発する.
- 肝臓のゾナルの極性と機能を in vitro で評価する.
- ゾーンアイデンティティの基礎にある分子メカニズムを調査する.
主な方法:
- ヒト誘発性多能幹細胞から得られたアスコルベートおよびビリルビン濃縮の肝臓前駆体との共培養.
- 単核RNA配列分析により,肝細胞の分化軌道を特定する.
- エピジェネティックとトランスクリプトミックの分析により,ゾーンアイデンティティの分子調節が解明される.
- 免疫不全のラットに 臓器移植
主要な成果:
- ゾーン特有の機能 (尿素循環,グルタチオン,グルタミン酸合成) を示す自己組み立て性肝臓器官を開発した.
- 周門細胞,インターゾーン細胞,周辺細胞を定義する肝細胞分化軌道を特定した.
- TET1/HIF1αに結合するアスコルベート/ビリルビン依存型EP300がゾーンアイデンティティをオーケストラする.
- 移植されたオルガノイドは,胆管結合症のネズミの生存率を向上させ,ハイパーアモネミアとハイパービリルビネミアを減少させた.
結論:
- 開発された多ゾーンオーガノイドシステムはヒト肝臓の構造を in vitro で成功裏に再現しています.
- このモデルは,肝臓の発達,代謝性ホメオスタシス,および疾患を研究するための貴重なツールとして機能します.
- この発見は肝臓の区分を制御する 分子機構の洞察を与えてくれます
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