CAR T細胞の過剰発現は,疲労抵抗を誘発する
Rachel C Lynn1,2, Evan W Weber1, Elena Sotillo1
1Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA, USA.
Nature
|December 6, 2019
まとめ
化学抗原受容体 (CAR) T細胞の枯渇は,がん治療の有効性を制限する. CAR T細胞の転写因子c- Junを強化すると,抗腫瘍活性が向上し,疲労を克服します.
科学分野:
- 免疫学
- 癌 生物学
- 細胞療法
背景:
- 化学抗原受容体 (CAR) T細胞はがん治療において有望であるが,T細胞の枯渇によって制限されている.
- T細胞の枯渇は,CAR T細胞の抗腫瘍効果を低下させ,その治療的応用に重大な障害をもたらします.
研究 の 目的:
- 人間のCAR T細胞における疲労の原因となる生物学的メカニズムを調査する.
- 疲労に耐えるCAR T細胞を設計し,その抗腫瘍能力を高める戦略を特定する.
主な方法:
- 人体T細胞の疲労特性を誘発するために,トニカルシグナル CARを持つモデルシステムを利用した.
- T細胞枯渇に関連した遺伝子発現,クロマチンのアクセシビリティ,および転写因子の活性を分析した.
- 遺伝子組み換え CAR T 細胞は AP-1 転写因子 c-Jun を過剰に発現させます
主要な成果:
- CAR T細胞の枯渇は,IL-2の生産障害と転写因子の活性変化 (AP-1,bZIP,IRF) と関連している.
- CAR T細胞におけるc- Junの過剰発現は,拡張を強め,機能を改善し,末端の分化を減少させた.
- エンジニアリングされたCAR T細胞は5つの異なるマウスモデルで優れた抗腫瘍能力を示しました.
結論:
- c-Junの機能的欠乏は,疲労したヒトT細胞で観察された機能障害に寄与する.
- CAR T細胞の過剰発現は疲労に対する耐性を高め,治療の可能性を高めます.
- CAR T細胞の枯渇をc-Jun強化で克服することは,この新興がん治療の重要な障壁である.
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