系统地施用低亲和度的HER2 CAR T细胞调解抗瘤疗效,没有毒性
Tamer Basel Shabaneh1, Andrew R Stevens1, Sylvia M Stull1
1Immunotherapy Integrated Research Center, Fred Hutchinson Cancer Center, Seattle, Washington, USA.
Journal for immunotherapy of cancer
|February 7, 2024
概括
针对人体表皮生长因子受体2 (HER2) 的低亲和度化学抗原受体 (CAR) T细胞有效控制了无毒的固体瘤. 高亲和度的CAR T细胞引起了点上,瘤外的毒性,强调了在针对HER2的CAR T细胞治疗中亲和度的重要性.
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细胞治疗固体瘤需要仔细评估向抗原,以平衡疗效和毒性.
- 人类表皮生长因子受体2 (HER2) 是一个有前途的标,但会带来点,瘤外不良事件的风险.
- 开发安全有效的CAR T细胞疗法来治疗HER2+固体瘤需要了解治疗窗口.
研究的目的:
- 研究CAR T细胞对小鼠HER2 (mHER2) 的亲和力对免疫能力较强的瘤模型中的安全性和疗效的影响.
- 评估CAR T细胞剂量和淋巴细胞减少对治疗结果的影响.
- 确定最佳的CAR设计,以向固体瘤中的HER2,同时最大限度地降低毒性.
主要方法:
- 为mHER2亲和力和特异性生成和选抗体.
- 在体外设计和测试了针对T细胞功能的HER2向CAR结构.
- 评估了各种 HER2 CAR T 细胞在具有 HER2+ 瘤的免疫能力小鼠模型和正常小鼠中的安全性和有效性.
主要成果:
- 高亲和度的HER2 CAR T细胞在正常的HER2表达组织中引起毒性,但显示出有限的瘤透和有效性.
- 低亲和度的HER2 CAR T细胞有效地透到HER2+瘤中,并控制瘤的生长,而不会引起毒性.
- 高亲密性CAR T细胞的毒性独立于瘤负担,与CAR T细胞增殖相关.
结论:
- 针对像HER2这样在正常组织中存在的抗原的高亲和性CARs具有显著的劣势.
- 低亲和度的HER2 CAR T细胞为表达HER2的固体瘤提供了一种安全有效的瘤回归策略.
- 这项研究确定了一种潜在的治疗方法,用于使用低亲缘关系的CAR T细胞治疗高HER2表达的固体瘤.
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