针对树突细胞的纳米粒子通过促进抗原呈现和阻断PD-L1通路来增强T细胞激活和抗瘤免疫反应
Prateek Srivastava1, Marie Rütter1, Gover Antoniraj1
1Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
ACS applied materials & interfaces
|September 30, 2024
概括
这项研究开发了新型纳米颗粒来增强树突细胞 (DC) 抗原呈现和阻断抑制PD-L1相互作用,显著提高T细胞介导的抗瘤反应对黑色素瘤. 纳米粒子策略为当前的抗PD-L1免疫疗法提供了一个有希望的替代方案.
科学领域:
- 免疫学 免疫学 免疫学
- 纳米技术 纳米技术
- 在瘤学瘤学.
背景情况:
- 瘤微环境 (TME) 中的树突细胞 (DC) 显示T细胞激活能力较差.
- 与瘤相关的DCs通过cis相互作用来表达PD-L1,抑制T细胞免疫力和CD80共刺激.
- 现有的免疫疗法在克服免疫抑制性TME方面面临挑战.
研究的目的:
- 开发一种基于纳米粒子的策略,同时增强DC抗原呈现和阻断PD-L1抑制功能.
- 为了在TME中放大T细胞介导的抗瘤反应.
- 调查这种双重作用方法作为抗PD-L1疗法的替代方案的有效性.
主要方法:
- 进行了 mesoporous silica nanoparticles (MSNPs) 的设计,加载了 clotrimazole (CLT) 来增强抗原呈现,为 DC 向 (CD206) 进行了曼化,并装饰了 PD-L1 结合 (PDL1bp).
- 功能化纳米粒子 (MSNP-MaN-PDL1bp/CLT) 在体外测试了它们促进DC-T细胞相互作用和IL-2分泌的能力.
- 在体内研究评估了对小鼠B16-F10黑色素瘤的治疗疗效,评估了瘤生长抑制和免疫标志物上调.
主要成果:
- MSNP-MaN-PDL1bp/CLT治疗增强了T细胞的DC抗原呈现 (MHC II) 和IL-2产生.
- 阻断PD-L1与PDL1bp的相互作用增加了DC2.4和T细胞的相互作用和IL-2分泌.
- 在体内,MSNP-MaN-PDL1bp/CLT显著抑制了黑色素瘤瘤的生长,超过了抗PD-L1疗法,并在瘤组织中增加了效应分子 (granzyme B,IFNγ,INFα).
结论:
- 开发的纳米粒子策略有效地增强了TME内的DC激活和T细胞刺激.
- 这种方法提供了一种有效的方法来克服瘤诱导的免疫抑制,并放大抗瘤免疫力.
- 双作用纳米粒子代表了癌症治疗的有希望的替代免疫疗法.
关键词:
在PD-L1中.在T细胞,T细胞.抗原呈现的呈现方式.抗瘤免疫力 免疫力克洛特里马佐尔 (clotrimazole) 是一种药物.树突细胞是一种树突细胞.半孔的二氧化纳米粒子.瘤微环境是一个微环境.更多相关视频
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