重编程巨细胞通过抗原化表现纳米增强器来改善癌症免疫疗法
Lifeng Liu1, Junmei Zhang1, Shihao Wang1
1School of Pharmacy, Jiang Su Key Laboratory of Drug Design and Optimization, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China.
ACS nano
|August 20, 2025
概括
用NanoAPP阻断CD47和抑制PI3Kγ可增强巨细胞癌细胞包裹和抗原呈现,改善适应性免疫和瘤抑制.
科学领域:
- 免疫学 免疫学 免疫学
- 纳米医学是一种纳米医学.
- 癌症治疗 癌症治疗
背景情况:
- 阻止CD47增强了瘤细胞的巨细胞化作用,但由于巨细胞的抗原呈现细胞 (APC) 功能有限,可能导致毒性和不足的适应性免疫反应.
- 抑制氨酸-3-激酶γ (PI3Kγ) 途径可以通过改变基体酸度和抗原降解来改善巨细胞APC的能力.
研究的目的:
- 开发一种新型纳米药物 (NanoAPP),可以顺序提供CD47阻断剂和PI3Kγ抑制剂,以增强瘤相关巨细胞 (TAMs) 中的"抗原细胞形成-呈现"级联.
- 评估纳米APP在弥合先天性和自适应性抗瘤免疫力的有效性,以改善癌症治疗.
主要方法:
- 开发一种适应pH的纳米药物 (NanoAPP),用于顺序递送αCD47和PI3Kγ抑制剂.
- 使用NanoAPP通过CD47阻止"不要吃我"信号,并通过TAMs中的PI3Kγ抑制增强抗原处理.
- 在小鼠瘤模型中评估瘤生长抑制和生存率,包括CD8+ T细胞和巨细胞枯竭实验.
主要成果:
- 纳米APP在瘤微环境中有效地阻断CD47并抑制细胞内PI3Kγ,增强TAMs的抗原呈现.
- 这种双重向策略降低了TAM激活值,弥合了先天性细胞和适应性T细胞反应.
- 纳米APP在转移性和已确定的小鼠瘤模型中显示出显著的瘤生长抑制和改善生存率.
结论:
- 通过NanoAPP对CD47和PI3Kγ的顺序纳米免疫调节,使TAM能够有效地治疗癌症.
- 这种方法优化了抗原化-呈现级联,提供了一种安全而有效的策略来增强抗瘤免疫力.
- 治疗效果依赖于CD8+ T细胞和巨细胞,突出显示了适应性和先天性免疫组件的重要性.
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