CD22 CAR-T细胞分泌CD19 T细胞参与剂,以改善B细胞急性淋巴细胞白血病进展的控制
Javier Arroyo-Ródenas1,2,3, Aida Falgas4,5, Laura Díez-Alonso1,2,3
1Cancer Immunotherapy Unit (UNICA), Department of Immunology, Hospital Universitario 12 de Octubre, Madrid, Spain.
Journal for immunotherapy of cancer
|April 30, 2025
概括
针对CD19和CD22的工程T细胞为B细胞急性淋巴细胞白血病 (B-ALL) 提供了新的希望. 使用分泌抗CD19抗体的CD22 CAR-T细胞的新策略显示,与现有的双向疗法相比,B-ALL的控制优越.
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:
- 像CAR-T细胞和TCE抗体这样的CD19导向免疫疗法对B细胞急性淋巴细胞白血病 (B-ALL) 显示出希望.
- 复发仍然是一个挑战,抗原逃逸或血统切换导致超过一半的患者复发.
- 双重向策略,包括CD19和CD22CAR-T细胞,旨在克服瘤逃逸.
研究的目的:
- 开发和评估一种针对B细胞恶性瘤的新型双向免疫疗法.
- 为了比较CD22CAR-T细胞分泌抗CD19TCE抗体 (CAR-STAb-T) 的临床前疗效与现有的双向CAR-T细胞策略.
主要方法:
- 产生CD22 CAR-T细胞,分泌一种抗CD19 TCE抗体 (CAR-STAb-T).
- 在临床前对CAR-STAb-T细胞与双重向的CD19/CD22联CAR-T细胞 (TanCAR-T) 和聚合的单一向的CAR-T细胞进行比较.
- 在体外细胞毒性测定和体内研究使用患者衍生的异种移植小鼠模型.
主要成果:
- CAR-STAb-T细胞在低效应剂:目标比率下表现出优异的旁观者T细胞重定向和更高的B-ALL细胞细胞毒性.
- 在抗原损失模型中,CAR-STAb-T细胞表现出更强大和更有效的反应,并减少了CD19阳性白血病的脱离.
- 在体内,CAR-STAb-T细胞在T细胞限制条件下的小鼠模型中更有效地控制了白血病进展.
结论:
- CD22 CAR-T 细胞分泌 CD19 T 细胞诱导剂,可以更好地控制 B-ALL 的进展.
- 这种新的CAR-STAb-T细胞策略显示了与当前基于双CAR的治疗方法相比的潜在优势.
- 支持对这种增强的双重向免疫疗法的进一步临床研究.
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