内抗原呈现细胞通过纳米纤维激活同时发生的三级淋巴体结构de novo新生代
Ran Cheng1, Sucheng Li1, Xianbin Ma2
1School of Life Science, Beijing Institute of Technology, Beijing 100081, P.R. China.
Science advances
|February 19, 2025
概括
研究人员开发了一种新的仿生纳米纤维,用于诱导瘤中的三级淋巴体结构 (TLS). 这种方法激活免疫细胞,促进适应性免疫反应,防止瘤生长,特别是在免疫冷瘤中.
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:
- 三级淋巴体结构 (TLS) 对于有效的癌症免疫疗法至关重要,与改善的临床结果相关.
- 在本地瘤中很少发现TLS,目前的方法很难诱导它们或利用它们的全部抗癌潜力.
- 与瘤相关的巨细胞 (TAMs) 和树突细胞 (DCs) 在瘤微环境和免疫反应调节中发挥关键作用.
研究的目的:
- 开发一种新的策略,以诱导瘤内的新三级淋巴体结构 (TLS) 的形成.
- 为了增强抗瘤免疫力,克服与免疫冷瘤相关的挑战.
- 调查仿生纳米纤维在重编程瘤微环境以改善癌症免疫疗法的有效性.
主要方法:
- 设计用于瘤向的生物模拟纳米纤维 (ADU-S@M1) 的构建.
- 在位激活抗原呈现细胞 (APC) 通过两极分化瘤相关的巨细胞 (M2到M1表型) 并促进树突细胞成熟.
- 在临床前小鼠模型中评估TLS新生,自适应性免疫反应和瘤发展,特别是对于免疫冷瘤.
主要成果:
- 该ADU-S@M1纳米纤维成功向瘤,并诱导丰富的激活APC.
- 激活的APC通过分泌淋巴毒素α和瘤缩因子α,同时还使瘤血管正常化,从而启动了de novoTLS的形成.
- 产生了强大的局部适应性免疫反应,从而有效预防小鼠的瘤发育,包括免疫冷瘤.
结论:
- 开发的仿生纳米纤维 (ADU-S@M1) 是诱导TLS形成和增强抗瘤免疫力的有希望的策略.
- 这种方法有效地重编程瘤微环境,激活APC并促进对瘤的适应性免疫反应.
- 这些发现为改善癌症免疫疗法提供了一条新的治疗途径,特别是对于通常对治疗无反应的瘤.
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