酸性瘤微环境调节的纳米颗粒增强胃癌光免疫疗法
Menglin Zhu1, Zhixiong Wang2, Yiren He3
1Department of General Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China; Department of General Surgery, The First Affiliated Hospital, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China.
Journal of advanced research
|June 8, 2025
概括
这项研究开发了FX-11@PEG-Ce6纳米粒子,用于对抗胃癌 (GC) 中的酸性瘤微环境. 将其与抗PD-1免疫疗法相结合,可显著增强抗瘤效果,并显示出对GC的有前途的治疗潜力.
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
- 纳米医学是一种纳米医学.
背景情况:
- 免疫疗法,特别是抗PD-1抗体 (α-PD-1),已经改变了癌症治疗,但在胃癌 (GC) 中表现出有限的疗效.
- 在GC中的酸性和免疫抑制性瘤微环境 (TME) 显著阻碍了α-PD-1疗法的有效性.
- 针对酸性TME对于开发GC的有效治疗策略至关重要.
研究的目的:
- 研究FX-11@PEG-Ce6纳米颗粒在胃癌光免疫治疗中的治疗功效.
- 评估FX-11@PEG-Ce6的潜力,以克服GC中的酸性TME所带来的挑战.
主要方法:
- 为GC光免疫疗法开发封装了PEG-Ce6纳米粒子 (FX-11@PEG-Ce6) 的FX-11.
- 使用电子显微镜评估纳米粒子形态,细胞吸收和瘤向.
- 对树突细胞成熟,T细胞细胞因子分泌 (TNF-α,IFN-γ,granzyme B) 和CD8+T细胞活性进行流动细胞计分析.
- 在体外和体内评估与α-PD-1结合的协同抗瘤效应.
- 通过组织学染色和主要器官的生物化学分析进行生物安全性评估.
主要成果:
- FX-11@PEG-Ce6纳米粒子表现出有利的细胞吸收和瘤向.
- 这些纳米颗粒诱导了显著的免疫细胞死亡,并促进了树突细胞的成熟.
- FX-11@PEG-Ce6有效地减轻了TME酸度,恢复了T细胞功能,并增强了CD8+T细胞的抗瘤活性.
- 在体内研究表明,瘤根除和显著增强α-PD-1的疗效与优越的生物相容性.
结论:
- 基于FX-11@PEG-Ce6的光动力学疗法和免疫疗法的组合在GC中实现了协同作用的抗瘤作用.
- 这种方法证明了出色的生物安全性,并具有显著的治疗潜力,可以改善GC中的光免疫治疗结果.
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