701-灵敏型CAR T细胞攻克实体瘤抗原异质性 episode artwork

EPISODE · Mar 27, 2026 · 25 MIN

701-灵敏型CAR T细胞攻克实体瘤抗原异质性

from 聊聊Sci

这项研究揭示了CD70抗原在实体瘤中表现出一种“伪异质性”,即那些在常规检测中呈阴性的癌细胞实际上携带极低水平的靶点表达。这种现象源于EZH2介导的表观遗传沉默,导致常规的CAR-T疗法无法完全清除肿瘤,从而引发抗原逃逸。为克服这一难题,研究人员开发了一种高灵敏度的HLA独立性T细胞(HIT)受体,能够识别并消灭表达超低量CD70的细胞。实验证明,这种HIT受体结合特定的共刺激信号,能有效根除包括肾癌、卵巢癌和胰腺癌在内的多种实体瘤。此外,通过分析染色质开放性,研究确认了这种低水平表达在患者群体中的普遍性,并验证了该疗法在正常组织中的安全性。该研究为提高免疫细胞治疗实体瘤的效力提供了新策略,强调了提升受体灵敏度以应对肿瘤异质性的重要性。References: Hanina S A, Park T, Lopez M, et al. Sensitive CAR T cells redefine targetable CD70 expression in solid tumors[J]. Science, 2026, 391(6788): 896-905.前往小宇宙评论区与主播互动

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701-灵敏型CAR T细胞攻克实体瘤抗原异质性

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