自催化氧化纳米复合物诱导癌症免疫疗法的铁亡
Lipeng Zhu1, Dongliang Leng2, Ziang Guo2
1School of Life Sciences, Central South University, Changsha 510006, China.
概括
氧化 (NO) 通过调节HMOX1并耗尽抗氧化剂,诱导铁过载和铁. 这种纳米剂通过触发铁和T细胞反应来增强癌症免疫疗法.
科学领域:
- 生物医学工程 生物医学工程
- 癌症研究 癌症研究
- 免疫治疗是一种免疫疗法.
背景情况:
- 铁,一种受调节的细胞死亡形式,是由依赖铁的脂质过氧化驱动的.
- 氧化 (NO) 在诱导铁过载和铁死中的确切作用尚未完全理解.
- 向铁亡提供了一种有前途的策略,用于癌症治疗和免疫疗法增强.
研究的目的:
- 调查氧化 (NO) 在促进铁过载和铁亡中的作用.
- 开发一种用于NO诱导铁灭菌和增强癌症免疫疗法的新型纳米剂.
主要方法:
- 合成氧化 (AZOSH) 纳米剂的酸 (HA) 修饰的Arg稳定氧化 (AZOSH).
- 研究AZOSH的NO生成,谷氨 (GSH) 消耗和脂质过氧化 (LPO) 诱导.
- 评估AZOSH介导的铁,细胞内铁 (Fe2+) 过载和免疫细胞死亡.
- 在体内对抗瘤功效的AZOSH与抗PD-1抗体结合的评估.
主要成果:
- AZOSH有效地产生NO,导致GSH耗尽,GPX4下调和增强LPO.
- NO上调血红氧酶1 (HMOX1) 表达和FHC siRNA介导费里分离,导致Fe2+过载.
- AZOSH通过Zn2+释放诱导铁亡,氧化应激,并促进T细胞激活和透.
- 联合AZOSH和抗PD-1疗法显示出显著的抗瘤疗效.
结论:
- 氧化 (NO) 通过刺激内源Fe2+释放和增强脂质过氧化,可以诱导铁亡.
- 开发的AZOSH纳米剂有效触发NO诱导的铁亡,并表现出强大的抗瘤活性.
- 这项研究建立了一个用于诱导铁亡的新策略,以增强基于PD-1的癌症免疫疗法.
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