瘤微环境响应纳米催化剂用于向化学动力学癌症治疗
Jun Ma1, Jingjing Qiu2, Shiren Wang1,3,4
1Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843, USA.
Advanced healthcare materials
|June 17, 2025
概括
新的纳米催化剂加速了用于癌症治疗的芬顿反应. 这些瘤激活的催化剂改善了向性,并产生了更多的基激素,有效地抑制了瘤的生长.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 材料科学 材料科学 材料科学
背景情况:
- 癌症治疗的挑战包括不足的过氧化 (H2O2) 水平,快速的Fe3+沉和缓慢的芬顿反应动力学.
- 开发有效的瘤微环境 (TME) 激活催化剂对于改善治疗结果至关重要.
研究的目的:
- 合成瘤激活的,自我加速的催化纳米催化剂,用于增强癌症治疗.
- 改善瘤向,H2O2响应能力和芬顿反应效率.
主要方法:
- 合成的聚 (乳糖-co-甘油酸) (PLGA) 封装的Ca-Fe过氧化物和聚氨酸 (R) 纳米催化剂.
- 用癌细胞膜 (CCM) 伪装的纳米催化剂,用于增强瘤向.
- 使用聚氨酸来调整PLGA对低H2O2水平的反应,并促进氧化 (NO) 的释放.
主要成果:
- 在同型瘤向和深层球状透 (>120微米) 中实现了6.5倍的增加.
- 经过H2O2触发的PLGA降解和NO释放,证明了持续的芬顿反应与放大基 (•OH) 产生,这是由于PLGA降解和NO释放.
- 呈现出剂量依赖的细胞毒性,聚氨酸显著降低了IC50值 (从216.9至43.38μg mL-1).
- 诱导偏好性亡,在7天内抑制瘤细胞增殖76.3%±8.4%.
结论:
- 响应TME,自我加速的CDT平台通过改进瘤向和放大激素生成来提高治疗效率.
- CCM-PLGA-CaFe-RNP通过克服传统芬顿基疗法的局限性,为有效的癌症治疗提供了一个有前途的战略.
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