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化学抗原受体树突细胞在临床前癌症模型中抑制黑色素瘤的生长

Julia Minnee¹, Wallace Zh Wong¹, Benjamin S Russell¹

¹Department of Microbiology, NYU Grossman School of Medicine, New York, New York, USA.

Journal for immunotherapy of cancer

|December 31, 2025

概括

化学抗原受体 (CAR) -状细胞 (DCs) 通过增强T细胞反应,显示出对固体瘤治疗的希望. 这种针对HER2的CAR-DC疗法有效抑制了瘤并改善了T细胞功能.

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:

化学抗原受体 (CAR) -T细胞疗法对血液癌症有效,但由于免疫抑制瘤微环境,在固体瘤中受到限制.
树突细胞 (DCs) 呈现抗原并激活T细胞,使它们成为CAR工程的合适候选人,以克服瘤防御.
准在某些乳腺癌中过度表达的人类表皮生长因子受体2 (HER2),是指导CAR-DC活动对抗固体瘤的策略.

研究的目的:

开发和评估CAR-engineered树突细胞 (CAR-DCs) 作为固体瘤的新型免疫疗法.
研究针对HER2的CAR-DCs在抑制瘤生长和增强抗瘤免疫反应方面的疗效.
评估共表达的免疫调节分子 (CD40L,PD-1抑制剂,GM-CSF) 对CAR-DC功能和耐久性的影响.

主要方法:

在SAMHD1中使用lentiviral载体生成CAR-DCs,敲除小鼠骨髓衍生DCs.
载体共表达CD40L,一种可溶性编程细胞死亡1 (PD-1) 抑制剂,以及颗粒细胞-巨细胞殖民地刺激因子 (GM-CSF) 以提高耐久性.
给患有B16.HER2黑色素瘤瘤的小鼠服用CAR-DC,以测量瘤生长和T细胞功能 (IFNγ表达,细胞解析试验).

主要成果:

CAR-DCs显著抑制了B16.HER2瘤的生长.
治疗CAR-DC诱导了瘤透的CD8+T细胞的增殖和激活.
同时表达PD-1抑制剂增强了抗瘤反应,并防止了T细胞的枯竭,而GM-CSF增强了反应的耐久性.

结论:

CAR-DCs代表了对固体瘤的有前途的治疗策略,利用DC抗原呈现能力.
这种方法可以与检查点抑制相结合,为单克隆抗体治疗提供了替代方案.
对于固体瘤治疗,需要进一步探索CAR-DC疗法.

关键词:

化学抗原受体 - - CAR 树突性树突性树突性免疫检查点抑制剂免疫检查点抑制剂免疫治疗是一种免疫疗法.

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