Apc変異細胞からのNOTUMは,癌を誘発するクローン競争に偏っている
Dustin J Flanagan1, Nalle Pentinmikko2,3, Kalle Luopajärvi2,3
1Cancer Research UK Beatson Institute, Glasgow, UK.
Nature
|June 3, 2021
まとめ
大腸がんの Apc変異細胞は NOTUM を使用してワイルド型細胞を抑制し,競争上の優位性を獲得します. NOTUMの抑制は腫瘍の成長を阻害し,潜在的な予防戦略を提供します.
科学分野:
- 腫瘍学
- 分子生物学
- 遺伝学
背景:
- 腫瘍抑制剤であるAdenomatous Polyposis Coli (APC) は,大腸がん (CRC) で頻繁に変異する.
- 腸の幹細胞におけるAPCの喪失は,WNTシグナル伝達を通じてアデノマの形成を促進するが,逆説的に,減少したWNTリガンド分泌は,変異細胞のコロニー化 (固定) を助長する.
研究 の 目的:
- Apc変異細胞がクローン上の優位性と腸内密室の固定性を獲得するメカニズムを調査する.
- Apc変異細胞の拡大を可能とする分子媒介者を特定する.
主な方法:
- Apc変異体と野生型の腸内細胞のトランスクリプトミックの分析
- In vitro オーガノイド培養と条件付け媒体の実験
- NOTUMの遺伝的または薬学的阻害を含むインビボ試験.
主要な成果:
- Apc変異細胞は,WNT抗体トランスクリプト,特にNOTUMの濃縮を示した.
- Apc変異細胞からの条件付け媒体は,NOTUM経由で,野生型オーガノイドの増殖を抑制した.
- NOTUMを分泌する Apc-変異性クローンは,野生型の細胞の増殖を抑制し,分化を促進し,ニッチ占拠の競争に勝った.
結論:
- NOTUMは,大腸がんにおけるApc変異細胞の早期固定における重要な媒介である.
- NOTUMをターゲットにすることで,野生型の細胞の競争力を回復し,アデノマの形成を抑制できます.
- NOTUMの抑制は,CRCのリスクが高い個人に潜在的な予防戦略を提示します.
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