癌の免疫療法は,表皮がん患者の変異特異的なCD4+T細胞を基に実施される
Eric Tran1, Simon Turcotte, Alena Gros
1Surgery Branch, National Cancer Institute (NCI), National Institutes of Health, Bethesda, MD 20892, USA.
まとめ
この研究では,特定の癌変異を標的としたT細胞が腫瘍を縮小させることが示されています. これらの変異特異性T細胞の利用は,転移性胆管がん患者の腫瘍回帰につながった.
科学分野:
- 免疫学 免疫学とは
- 腫瘍学 腫瘍学
- 遺伝学 遺伝学とは
背景:
- 限られた証拠によると,ヒトは,上皮がんに対する突然変異特異のT細胞応答をマウントすることができます.
- 腫瘍浸透性リンパ球 (TIL) は,がんに対する免疫反応において重要な役割を果たします.
研究 の 目的:
- 転移性上皮がんの回帰を媒介する突然変異特異のT細胞応答の可能性を調査する.
- 腫瘍特異変異を標的とした採用型T細胞治療の有効性を実証する.
主な方法:
- ホールエクソミックシーケンシングは,腫瘍浸透性リンパ球 (TIL) の変異を特定するために使用されました.
- 特定の変異 (ERBB2IP) を認識するCD4+ Tヘルパー1 (T(H) 1) 細胞が,転移性胆管がん患者で確認されました.
- TILと精製された変異反応性T (H) 1細胞の養子移植が行われました.
主要な成果:
- TILには,ERBB2IPの変異を認識したCD4+ T(H) 1細胞が含まれていました.
- 25%の変異特異性T(H) 1細胞によるTILの初期養子移植は,標的病変の減少と疾患の安定化をもたらしました.
- 変異反応性T(H) 1細胞の高度に浄化された集団 (>95%) で再治療すると,さらなる腫瘍の回帰が起こりました.
結論:
- 変異した抗原に対するCD4+T細胞の反応は,転移性上皮がんの回帰を達成するために活用することができます.
- この研究は,T細胞によるがん特異変異を標的とした治療の可能性の証拠を提供します.
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