富氧化功能纳米颗粒用于增强癌症免疫疗法的潜能
Mengli Zhou1,2, Shuang Liang1,2, Dan Liu1,2
1State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.
Nano letters
|November 6, 2023
概括
新的富含的过氧化纳米颗粒 (MONPs) 激活了STING通路并诱导癌细胞死亡. 这些纳米粒子增强抗瘤免疫力,减少免疫抑制,为协同癌症免疫疗法提供了一个有前途的战略.
科学领域:
- 纳米技术纳米技术
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
背景情况:
- 目前的免疫疗法由于免疫激活不足和免疫抑制瘤微环境 (TME) 而面临局限性.
- 开发新的策略来克服这些障碍对于提高癌症治疗疗效至关重要.
研究的目的:
- 开发适应瘤微环境 (TME) 的富含过氧化纳米颗粒 (MONPs) 用于协同癌症免疫疗法.
- 研究MONPs在诱导免疫细胞死亡 (ICD) 和激活干扰素基因 (STING) 途径刺激器方面的潜力.
主要方法:
- 设计和合成了对酸性瘤微环境有反应的丰富过氧化纳米颗粒 (MONPs).
- 评估了MONP产生基基 (•OH) 的能力,用于ICD诱导.
- 评估了Mn2+激活STING通路,细胞因子分泌,T细胞反应和免疫抑制细胞 (Tregs,M2巨细胞) 的调节.
主要成果:
- MONPs在酸性TME中有效分离,产生OH诱导癌细胞免疫性死亡 (ICD).
- 激活STING通路,导致I型干扰素和炎症性细胞因子分泌量增加,促进T细胞反应.
- 减少调节性T细胞 (Tregs) 和两极化M2巨细胞到M1表型,缓解TME免疫抑制.
- 与抗PD-1抗体的联合治疗显示出优异的瘤生长抑制和预防肺转移.
结论:
- 在癌症免疫疗法中,MONP代表了一种功能性纳米粒子策略,用于放大STING天生的刺激.
- 这种方法提供了一个有希望的协同策略,以增强抗瘤免疫反应,克服TME介导的免疫抑制.
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