エーテル脂質の可塑性は,フェロプトーシスの感受性と回避を促進する
Yilong Zou1,2, Whitney S Henry3, Emily L Ricq4,5
1Broad Institute, Cambridge, MA, USA. yzou@broadinstitute.org.
Nature
|September 17, 2020
まとめ
ペロキシソームは,多不飽和エーテルリン脂 (PUFA-ePLs) を合成することによって,鉄に依存する細胞死であるフェロプトーシスを決定的に調節する. これらの脂質は,がん細胞および他の細胞のフェロプトーシス感受性を誘発します.
科学分野:
- 細胞生物学
- 生物化学
- 腫瘍学
背景:
- 鉄に依存する細胞死であるフェロプトーシスは 退行性疾患や癌に 関わっている.
- フェロプトーシス感受性のダイナミックな調節を理解することは,治療開発にとって極めて重要です.
- フェロプトーシスの感受性を制御する正確なメカニズムは,ほとんど不明である.
研究 の 目的:
- フェロプトーシス感受性の重要なレギュレータを特定する.
- フェロプトーシスにおける特定の臓器細胞と脂質種の役割を明らかにする.
- フェロプトーシス関連疾患の治療目標を探求する.
主な方法:
- ゲノム全体のCRISPR- Cas9抑制スクリーンを用いて,フェロプトーシスの遺伝的変異因子を特定した.
- 脂質分析は,フォスフォリピド組成の変化を分析するために使用されました.
- 研究はヒトの腎臓および卵巣がん細胞,および in vivo マウスモデルで行われました.
主要な成果:
- ペロキシソームはフェロプトーシス感受性の重要な寄与体として特定された.
- ペロキシソームは,フェロプトーシスを誘発する脂質過酸化の基質である多不飽和エーテル・フォスホリピド (PUFA-ePL) を合成する.
- 癌細胞は,PUFA- ePLをダウン調節することで,フェロプトーシス抵抗性状態に移行することができます.
- PUFA- ePLsのプロフェロプトティックな役割は,神経細胞や心筋細胞のような非新生細胞に及ぶ.
結論:
- ペロキシソーム-エーテル-フォスフォリピド軸は,フェロプトーシスの感受性および回避の重要な決定因子です.
- ポリ不飽和エーテルフォスホリピド (PUFA-ePLs) は,細胞状態の移行時に動的に調節される異なる機能性脂質のクラスです.
- この軸は,フェロプトーシスを含む疾患の潜在的な治療目標を提供します.
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