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LSD1除去は抗腫瘍免疫を刺激し,チェックポイントブロックを可能にします
Wanqiang Sheng1, Martin W LaFleur2, Thao H Nguyen3
1Division of Newborn Medicine and Epigenetics Program, Boston Children's Hospital, Boston, MA 02115, USA; Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.
Cell
|June 26, 2018
まとめ
癌細胞におけるLSD1の抑制は,反復的要素の発現を増加させ,インターフェロンを活性化することによって,抗腫瘍免疫を高めます. このアプローチは免疫療法の反応を高め,新しいがん治療戦略を示唆しています.
科学分野:
- 癌 生物学
- 免疫学
- エピジェネティクス
背景:
- 染色体調節体は遺伝子発現に不可欠であり,その調節不良が癌に寄与する.
- ヒストン脱メチラーゼLSD1 (ライシン特異性脱メチラーゼ1) は様々な癌に関与している.
研究 の 目的:
- LSD1が遺伝子発現と抗腫瘍免疫を調節する役割を調査する.
- LSD1の抑制を癌の治療戦略として検討する.
主な方法:
- 癌細胞におけるLSD1の消去
- リピートエレメントとRNA誘発サイレンシングコンプレックス (RISC) のコンポーネント表現の分析.
- 双鎖RNA (dsRNA) ストレスと1型インターフェロン活性化の評価
- マウスモデルにおける腫瘍免疫性,T細胞浸透,および抗PD-1治療に対する反応の評価.
- LSD1発現とCD8+T細胞浸透の相関性に関するTCGAデータの分析.
主要な成果:
- LSD1の消去により,リピートエレメントと内生レトロウイルスエレメント (ERV) の発現が増加した.
- RISCコンポーネントの発現低下はdsRNAストレスと1型インターフェロン活性化につながった.
- LSD1の減少は腫瘍の免疫性およびT細胞の浸透性を高め,耐性メラノーマの抗PD-1治療に対する反応を改善した.
- TCGAのデータは,ヒトがんにおけるLSD1発現とCD8+T細胞浸透の間の逆相関を示した.
結論:
- LSD1の阻害は抗腫瘍免疫を強化し,免疫療法への反応性を高める.
- LSD1は抗腫瘍免疫の重要な阻害剤である.
- LSD1の阻害とPD- L) 1の阻害を組み合わせることで,がん治療の新たな戦略が期待されます.
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