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テロメラーゼを発現する分布した肝細胞は,ホメオスタシスと損傷で肝臓を再生します
Shengda Lin1,2,3, Elisabete M Nascimento1,2,3, Chandresh R Gajera1,2,3
1Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA.
Nature
|April 6, 2018
まとめ
高テロメラーゼ (TERT^High) を発現する希少な肝細胞は,正常な状態と損傷後の肝臓の再生を促します. 肝臓の質量と機能を維持します 肝臓の質量と機能を維持します
科学分野:
- ヘパトロジー
- 細胞生物学
- 幹細胞 研究
背景:
- 肝細胞の再生は肝臓のホメオスタシスと損傷からの回復に不可欠です.
- 成人の肝臓における肝細胞の再生の 特定の細胞源は 捉え難いままです
- テロメラーゼ発現は幹細胞の特徴であり,肝臓疾患に関与しています.
研究 の 目的:
- 肝臓の再生を担う肝細胞の細胞源を特定する
- 肝細胞再生におけるテロメラーゼの役割を調査する.
- ホメオスタシスと損傷中の肝臓の再生のメカニズムを解明する.
主な方法:
- ネズミのテロメラーゼ逆転写酵素 (Tert) 局所を用いた系統追跡.
- テロメラーゼ濃度の高い肝細胞のRNA配列解析
- 肝臓が化学的に損傷した
主要な成果:
- 高テロメラーゼ発現 (TERT^High hepatocytes) の希少なサブセットを特定した.
- TERT^高肝細胞は肝葉全体に分布し,ホメオスタシスや損傷中に肝臓を再生します.
- TERT^高肝細胞は自己再生し,分化し,膨張するクローンを形成し,その代謝遺伝子はダウンレギュレーションされます.
- TERT^Hの高肝細胞の除去は肝臓損傷を悪化させ,星状細胞の活性化と線維症を引き起こす.
結論:
- TERT^高い肝細胞は,分散型モデルにおける肝臓再生の主な源である.
- これらの細胞は,潜在的に代謝と再生機能を分離する独特の特徴を持っています.
- 肝臓疾患の治療法の開発にはTERT^高肝臓細胞機能の理解が不可欠です.
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