亲和成熟的CD72向纳米体的CAR T细胞增强了消除低抗原B细胞恶性瘤的效果
Adila Izgutdina1, Tasfia Rashid1, William C Temple2,3
1Department of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.
Journal for immunotherapy of cancer
|December 30, 2025
概括
化学抗原受体 (CAR) 向CD72的T细胞疗法对B细胞癌症具有前景,这些癌症对CD19导向的治疗不耐药. 亲和成熟的CD72纳米体CAR T细胞 (纳米CARs) 对表达低CD72的瘤表现出更好的疗效.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物技术是生物技术.
背景情况:
- 化学抗原受体 (CAR) T细胞疗法对血液癌症有效.
- 瘤表面抗原密度低可能会限制CAR T细胞的疗效.
- CD72是耐火性B细胞癌的有希望的标,但低表达可能会导致抵抗.
研究的目的:
- 研究针对CD72的CAR T细胞对B细胞恶性瘤的疗效.
- 探索克服由于CD72表达低而导致的治疗耐药性的策略.
- 为了评估CD72作为第二线免疫疗法目标后CD19导向疗法.
主要方法:
- 由亲和力成熟的纳米体生成的CAR T细胞 (纳米CAR) 向CD72.
- 通过使用 luciferase 标记的细胞系进行了体外细胞毒性测定.
- 在NOD scid gamma小鼠中使用异种移植进行了体内研究.
- 研究了布里奥斯塔丁对CD72表面抗原密度的影响.
主要成果:
- 在B细胞非霍奇金淋巴瘤中确认了无处不在的CD72表达.
- 在CD19抵抗性B细胞急性淋巴细胞白血病 (B-ALL) 模型中观察到保存的CD72表达和减少的CD22表达.
- 通过亲和力成熟的CD72纳米CARs证明了在体外增强的CD72低表达瘤的消除.
- 在B细胞恶性瘤模型中发现,布里奥斯塔丁增加了CD72表面抗原密度.
- 通过亲和力成熟的纳米体识别CD72抗原的鉴定确定了关键残留物.
结论:
- 亲和成熟的CD72纳米CARs是对CD19耐火性B细胞癌症的潜在免疫疗法.
- 对于B-ALL,CD72可能是比CD22更好的二线免疫治疗点.
- 增强CAR T细胞功能的策略,例如增加抗原密度,对于治疗成功至关重要.
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