增强了CD19/CD22双特异性CAR-T细胞与EAAAK链接器在B细胞恶性瘤上的有效性
Renyuxue Ma1, Fengtao You2, Shuaiyu Tian1
1Cyrus Tang Medical Institute, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, China.
European journal of haematology
|September 6, 2023
概括
针对CD19和CD22的新型双特异性CAR-T细胞对B细胞瘤的疗效有所提高. 这些工程T细胞克服了单一向疗法所见的复发问题,提供了一个有前途的新治疗策略.
科学领域:
- 免疫治疗是一种免疫疗法.
- 在瘤学瘤学.
- 细胞疗法细胞疗法
背景情况:
- CD19 CAR-T细胞疗法对B细胞瘤有希望,但患有高复发率.
- 复发通常是由于瘤细胞失去CD19表达.
- 针对CD22等额外的抗原可以克服这一局限性.
研究的目的:
- 设计和比较CD19/CD22双特异性CAR-T细胞,具有不同的链接结构和抗体序列.
- 评估这些新型双特异性CAR-T细胞的体外和体内疗效.
- 为解决B细胞恶性瘤复发的新策略提供.
主要方法:
- 设计和合成了四种不同的CD19/CD22双特异性CAR-T细胞结构.
- 试验室评估包括细胞毒性,细胞因子分泌,持续杀死,分化和疲劳.
- 活体内疗效在NSG小鼠中进行了评估,特别是在CD19阴性复发模型中.
主要成果:
- 使用 (EAAAK) 3链接器的双特异性CAR-T细胞表现出优异的细胞毒性和细胞因子分泌.
- 这些最佳的Bis-C CAR-T细胞表现出增强的持续杀死,记忆表型差异化和减少疲劳.
- 在体内,Bis-C CAR-T细胞在CD19低或CD19阴性复发模型中有效控制了瘤进展.
结论:
- 开发了一种新的双特异性CAR-T细胞,可以向CD19和CD22.
- 这种双特异的方法提供了一个潜在的解决方案,以克服单一向CAR-T治疗的局限性,包括瘤复发.
- 这些发现为治疗有限反应或复发的B细胞瘤提供了一个有希望的新策略.
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