纳米酶作为瘤能量恒温破坏者介导铁化,用于高效放射治疗
Xingchen Li1, Yuxuan Zhang2, Annan Liu1
1State Key Laboratory of Supramolecular Structure and Material, College of Chemistry, Jilin University, Changchun 130012, China.
Journal of colloid and interface science
|February 23, 2025
概括
这项研究引入了一种Ir@Au纳米酶,通过破坏能量和诱导铁亡来对抗瘤的放射电阻. 这种新的方法通过放大反应性氧物种 (ROS) 产生来提高放射治疗的疗效.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术 纳米技术
- 癌症治疗 癌症治疗
背景情况:
- 瘤的放射电阻限制了放射治疗 (RT) 的有效性,通常是由于反应性氧物种 (ROS) 不足.
- 破坏瘤能量稳态和诱导铁亡是克服放射电阻的潜在策略.
研究的目的:
- 开发一种Ir@Au纳米酶来增强瘤的辐射敏感性.
- 研究纳米酶破坏瘤能量和诱导铁灭的机制.
主要方法:
- 该Ir@Au纳米酶模仿葡萄糖氧化酶,阻断瘤的能量供应,并产生过氧化 (H2O2).
- 纳米酶作为化学动力学疗法 (CDT) 的过氧化酶 (POD) 作用,减少谷氨 (GSH) 并产生ROS.
- Ir@Au纳米酶在暴露于电离辐射时放大ROS的产生,增强DNA损伤和脂质过氧化.
- Ir@Au纳米酶作为计算机断层扫描 (CT) 对比剂,用于精确的RT.
主要成果:
- 这种Ir@Au纳米酶有效地破坏了瘤能量恒温.
- 纳米酶诱导的ROS生成和抗氧化剂的耗尽促进铁亡.
- 结合RT和纳米酶治疗可逆转放射电阻并抑制瘤生长.
- 通过CT成像指导实现了精确的RT传递.
结论:
- Ir@Au纳米酶是一种有前途的策略,可以克服瘤的放射电阻.
- 该纳米酶通过ROS介导的铁和能量破坏来增强RT的有效性.
- 这种方法为癌症治疗提供了一种双重功能的治疗药剂.
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