瘤微环境重编程的双金属混合纳米刺激器,用于触发放射性-质-免疫疗法
Xiaohong Jiang1, Jin Wang2, Weijie Huang1
1Department of Pharmacy, Shantou University Medical College, Shantou, 515041, China.
Advanced healthcare materials
|August 13, 2024
概括
这项研究引入了一种新的纳米刺激器,它将放射治疗与铜诱导的细胞死亡 (cuproptosis) 结合起来,以增强抗瘤免疫力和长期预防乳腺癌.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 癌症免疫疗法癌症免疫疗法
背景情况:
- 由于辐射剂量和瘤微环境 (TME) 等因素,传统放射治疗 (RT) 仅限于局部治疗.
- 辐射诱导免疫细胞死亡 (ICD) 为放射性免疫疗法提供了一条途径,但在有效激活方面面临挑战.
- 瘤微环境 (TME) 的组成部分,如谷氨 (GSH) 和M2巨细胞,阻碍了治疗的有效性.
研究的目的:
- 开发一种新的双金属混合纳米级协调纳米刺激器,用于增强癌症放射免疫治疗.
- 调查纳米刺激器重新编程TME并使瘤放射敏感的能力.
- 探索辐射,cuproptosis和免疫疗法对乳腺癌治疗的协同效应.
主要方法:
- 一个聚烯 (PVP) 改性铜 (Cu2+) 和 (Hf4+) 合酸纳米刺激器 (CHP) 的合成.
- 评估CHP对TME组件的影响:GSH耗尽,缺氧缓解和M2巨细胞再极化.
- 在4T1瘤携带小鼠模型中评估CHP介导的放射敏感化,活性氧物种 (ROS) 生成和cuproptosis诱导.
- 对RT诱导的抗瘤免疫和长期免疫记忆的分析.
主要成果:
- CHP有效地重新编程了TME,耗尽了GSH,缓解了缺氧,并重新极化了M2巨细胞.
- 在低X射线剂量下,CHP实现了瘤放射敏感化,增强了ROS积累,并增强了cuproptosis.
- cuproptosis通过ICD激活放大RT诱导的抗瘤免疫力,导致强大的免疫反应和远程瘤抑制.
- 发现CHP介导的质死在X射线照射期间可加剧.
结论:
- 开发的CHP纳米刺激器呈现了一种新的放射性-cuproptosis-免疫疗法级联策略.
- 这种方法克服了传统RT的局限性,通过增强瘤免疫性和克服放射电阻.
- 这些发现为创新的乳腺癌治疗策略提供了新的视角.
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