向性脂质纳米颗粒传递FAP-CARmRNA使得对胰腺瘤进行强大的体内T细胞工程成为可能
Khuloud Bajbouj1, Zebin Xiao2, Leslie Todd3
1University of Pennsylvania Philadelphia, PA, PA United States.
Cancer immunology research
|February 13, 2026
概括
这项研究引入了一种体内方法,用于设计针对纤维细胞激活蛋白 (FAP) 的嵌合式抗原受体 (CAR) T 细胞. 这种新的方法表明,它有望安全有效地使瘤微环境在脱质瘤中的正常化.
科学领域:
- 在瘤学瘤学.
- 免疫治疗是一种免疫疗法.
- 生物技术是生物技术.
背景情况:
- 纤维细胞激活蛋白 (FAP) 在与癌症相关的纤维细胞 (CAFs) 上高度表达,是正常化瘤微环境的目标.
- 之前的ex vivo逆转录病毒转化FAP特异性化学抗原受体 (FAP-CAR) T细胞疗法通过破坏脱质基质并增强免疫细胞透,延迟了瘤生长.
研究的目的:
- 开发和评估一种用于生成FAP-CAR T细胞的体内策略,使用封装FAP-CAR mRNA的向性脂质纳米颗粒 (tLNP).
- 在胰腺管腺癌的临床前模型中,比较体内生成的FAP-CAR T细胞与体外逆转录病毒转导的CAR T细胞的疗效.
主要方法:
- 在体内使用封装FAP-CAR mRNA的抗CD5结合TLNP生成FAP-CAR T细胞.
- 给FAP-CAR mRNA tLNPs进行一次静脉注射.
- 将T细胞丰度和瘤生长抑制与ex vivo逆转录病毒转化CAR T细胞进行比较.
主要成果:
- 在一次剂量FAP-CAR mRNA tLNP后,在脏,循环和瘤透的T细胞 (分别为45%,69%和35%) 中实现了暂时的CAR表达.
- 在体内mRNAtLNP方法中检测到外周和内FAP-CAR+ T细胞的丰度较大,与体外逆转录病毒转导相比.
- 观察到的瘤生长抑制与ex vivo逆转录病毒工程T细胞实现的抑制相当或超过.
结论:
- 在体内mRNA CAR T细胞工程提供了一种潜在的更安全,更容易获得和更具成本效益的方法来准树皮细胞.
- 这个平台绕过了对T细胞独生隔离,病毒载体和淋巴细胞剥离的需求.
- 这种方法对正常化脱塑性瘤中的瘤微环境以及更广泛的瘤抗原向CAR T细胞疗法具有重要意义.
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