瘤微环境响应的巨细胞介导免疫治疗药物输送
Xueyang Zhang1, Ludan Yue2, Lei Cao2
1The Research and Application Center of Precision Medicine, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, China; Shenzhen Bay Laboratory, Shenzhen 518132, China; School of Pharmacy, Guangdong Medical University, Dongguan, Guangdong 523808, China.
Acta biomaterialia
|August 3, 2024
概括
这项研究引入了一种新的巨介导药物递送系统 (PR-M),该系统有效向瘤并逆转免疫抑制. PR-M系统通过重编程巨细胞和激活T细胞来增强抗瘤免疫力,从而导致显著的瘤生长抑制.
科学领域:
- 生物医学工程 生物医学工程
- 癌症免疫疗法癌症免疫疗法
- 药物输送系统 药物输送系统
背景情况:
- 瘤微环境 (TME) 免疫抑制限制了癌症免疫疗法的有效性.
- 瘤相关巨细胞 (TAMs) 是TME中的关键调节者,经常促进免疫逃避.
- 开发策略来重编程TAM并克服TME介导的免疫抑制对于有效的癌症治疗至关重要.
研究的目的:
- 设计和评估一种M0型巨介导药物递送系统 (PR-M) 用于向癌症免疫治疗.
- 研究PR-M通过使巨细胞偏向抗瘤M1表型来逆转TME免疫抑制的能力.
- 评估TLR主激素R848释放和巨细胞重编程对抗瘤免疫和瘤生长的协同效应.
主要方法:
- 工程设计的M0型巨细胞装载有托尔类受体 (TLRs) 激动剂R848封装纳米颗粒 (PR-M).
- 向结直肠癌小鼠模型注射PR-M以评估TME调制和抗瘤功效.
- 在M1/M2巨细胞群,T细胞激活 (CD4+,CD8+),细胞因子 (IFN-γ,TNF-α,IL-10,IL-12),瘤生长和体积的量化变化.
主要成果:
- PR-M治疗导致瘤部位的大量积累,M1型巨细胞增加了5.47倍,M2型巨细胞减少了65.08%.
- 该疗法通过激活CD4+和CD8+T细胞并调节关键细胞因子,有效地将"冷"瘤转化为"热"瘤.
- 在结直肠癌模型中表现出显著的抗瘤作用,达到85.25%的瘤生长抑制和87.55%的瘤体积减少.
结论:
- 巨介导药物递送系统 (PR-M) 可以有效地向瘤并克服TME诱导的免疫抑制.
- 通过重编程TAM和激活T细胞,PR-M系统协同增强抗瘤免疫力,为癌症免疫疗法提供了一个有前途的策略.
- 这种方法显示了改善药物向,降低毒性和强大的抗瘤免疫激活的潜力.
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