クロマチンの状態は,腫瘍特有のT細胞機能障害と再プログラミングを定義する
Mary Philip1, Lauren Fairchild2,3, Liping Sun4
1Immunology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA.
Nature
|May 18, 2017
まとめ
腫瘍に浸透するCD8T細胞は2つの状態で存在します "つはプラスチックで再プログラム可能で もう"つは固定され,抵抗性があります 表面マーカーを特定することで 機能不全のT細胞が 癌の免疫療法のために 治療的に再プログラムされることが予測されます
科学分野:
- 免疫学
- 癌 生物学
- エピジェネティクス
背景:
- 固体腫瘍の腫瘍特異的なCD8T細胞はしばしば機能不全を起こし,抗腫瘍免疫反応を阻害する.
- T細胞機能不全と免疫チェックポイントブロックなどの再プログラム療法に対する感受性を支配する表遺伝的メカニズムは,まだ十分に理解されていません.
研究 の 目的:
- 腫瘍におけるCD8 T細胞機能障害の表遺伝的調節を調査する.
- 腫瘍内の異なるT細胞状態と,その治療的再プログラムの可能性を特定する.
- 癌の免疫療法のための T細胞の再プログラム性を予測する表面マーカーを発見するために
主な方法:
- マウスの腫瘍に浸透するCD8T細胞におけるクロマチンの状態の分析.
- T細胞のサブ集団を区別する表面マーカーの識別
- マウスとヒトの腫瘍に浸透するCD8T細胞の比較
主要な成果:
- マウス腫瘍のCD8T細胞は,2つの離散的な染色体状態に分けられる:プラスチックの再プログラム可能な機能障害状態と固定された抵抗性の機能障害状態である.
- 再プログラム可能な非再プログラム可能なPD1hi機能障害のCD8T細胞を区別する特定の表面マーカーが特定されました.
- これらの特定された表面マーカーは,ヒトの腫瘍に浸透するPD1hi CD8 T細胞にも存在します.
結論:
- エピジェネティック・プログラムは,腫瘍内の異なる機能不全のCD8T細胞状態を決定し,その治療の可能性に影響を与えます.
- 表面マーカーは機能不全のCD8T細胞の再プログラム性を予測し,がん免疫療法のためのバイオマーカーを提供します.
- これらのエピジェネティックと表面マーカーのプロフィールを理解することは,効果的な免疫療法の開発に不可欠です.
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