ヒトがんに対する採用細胞免疫療法の反応を媒介する幹細胞のようなCD8T細胞
Sri Krishna1, Frank J Lowery1, Amy R Copeland1
1Surgery Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
まとめ
アドプティブT細胞療法 (ACT) は癌の回復に有望であることが示されています. 研究者らは,成功したACT結果に関連した特定の腫瘍浸透性リンパ球 (TIL) 現象型を特定し,幹状および末端分化TILを区別した.
科学分野:
- 免疫学
- 腫瘍学
- 細胞生物学
背景:
- オートログの腫瘍浸透性リンパ球 (TILs) を利用したアドプティブT細胞療法 (ACT) は,癌の完全回復を誘導することができる.
- ACTにおける臨床成功と相関するTILの特定のフェノタイプは,ほとんど定義されていない.
- TILのフェノタイプを理解することは,ACTの有効性を最適化するために不可欠です.
研究 の 目的:
- TIL-ACTの臨床成功に対するTILフェノタイプの影響を調査する.
- 癌の完全回帰と長期持続に関連した特定のTILサブセットを特定する.
- 抗腫瘍新抗原に対する反応として異なるTILフェノタイプの機能的能力を特徴づける.
主な方法:
- 人間のACT製品の高次元分析
- CD39やCD69のようなマーカーを用いたTILの表型的特徴化.
- TILの持続性,自己更新,拡張能力の評価
- in vivoの抗腫瘍反応の評価
主要な成果:
- 幹状の記憶原型 (CD39陰性,CD69陰性) は,完全な癌回帰とTIL持続と関連していた.
- 末期差別化フェノタイプ (CD39陽性,CD69陽性) は,TIL持続性の低下と相関している.
- ほとんどのネオアンチゲン反応性TILは終末分化されたが,ACT応答者は幹のようなネオアンチゲン特異性TILのプールを維持した.
- 腫瘍反応性幹型のTILは,優れた自己再生,拡張,持続性,およびin vivoの抗腫瘍活性を示した.
結論:
- ACT応答を媒介するTILサブセットは,即時の抗腫瘍反応性のために強化されたサブセットとは異なる.
- ACTの持続的な治療効果には,幹のようなネオアンチゲン固有のTILの存在が不可欠である.
- これらの幹のようなTIL集団をターゲットにしたり,増強したりすると,がん治療におけるACTの有効性が向上する可能性があります.
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