3Dオルガノイドとしてのマウスとヒト肝細胞の長期拡張
Huili Hu1, Helmuth Gehart2, Benedetta Artegiani2
1Oncode Institute, Hubrecht Institute, KNAW (Royal Netherlands Academy of Arts and Sciences), Utrecht, the Netherlands; The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Shandong University, 250012 Jinan, China.
Cell
|December 1, 2018
まとめ
研究者らは肝細胞の新たな3Dオーガノイド培養を開発し,損傷後の肝臓の再生を模倣した. この画期的な発見により 肝臓細胞の増殖を in vitro で研究することができ 肝臓疾患の研究が進んでいます
科学分野:
- ヘパトロジーと再生医療
- 3Dオルガノイド培養技術
背景:
- 哺乳類の肝臓の再生は2つの異なる経路で起こります. 慢性疾患の卵性細胞応答と急性損傷の成熟した肝細胞増殖です.
- 既存の in vitro モデルは,卵性細胞の反応を成功裏に複製しますが,部分肝切除 (PHx) のような急性損傷後の肝細胞の増殖能力を捉えることはできません.
研究 の 目的:
- 主要肝細胞の増殖反応を in vitro で再現できる 3D オーガノイド培養システムを確立する.
- これらの肝細胞オルガノイドの形態的,機能的,遺伝子発現の特徴を特徴づける.
- 肝臓損傷後の肝細胞増殖を真似する organoidsの能力を検証する.
主な方法:
- マウスとヒトの原始肝細胞を用いた新しい3Dオーガノイド培養システムの開発.
- 単一の肝細胞からオーガノイドを決定し,その長期的安定性の評価 (数ヶ月).
- オーガノイドの形態,機能,遺伝子発現,転写プロフィールの分析.
- ヒト肝細胞のオルガノイドをマウスに埋め込み,その生殖能力を in vivo で評価する.
主要な成果:
- 単一のマウスとヒトの原始肝細胞から長期にわたる3Dオーガノイド培養を成功裏に確立しました.
- オルガノイドは長期間培養期間中に重要な形態学,機能,遺伝子発現の特徴を維持した.
- オーガノイドの転写プロファイルは,PHx後の増殖中の肝細胞とよく似ています.
- 移植されたヒト肝細胞のオーガノイドは,自然に発生する肝細胞の損傷反応を反映して,体内での広範な増殖を示した.
結論:
- 開発された3Dオーガノイド培養システムは,急性肝損傷後の肝細胞の増殖反応を効果的に再現します.
- この新しい in vitro モデルは,肝細胞再生の研究に強力なツールを提供し,肝臓疾患と治療法の研究を進める可能性があります.
- このシステムは,マウスとヒトの肝細胞の行動の両方を成功裏にモデル化し,トランスレーションの可能性を提供します.
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