自组装的具有GSH/ROS部位响应的多组件前体药物可实现空间时间控制的释放,用于治疗耐药NSCLC
Chaozheng Zhang1, Yao Chen2, Xiaoke Shi3
1State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China; Department of Respiratory Medicine, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China.
概括
这项研究开发了一种新型纳米药物PSOTNs,用于克服非小细胞肺癌 (NSCLC) 中的帕克利塔塞尔耐药性. PSOTN结合了三种药物,具有协同作用,增强了对抗耐药瘤的治疗疗效.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 在瘤学瘤学.
背景情况:
- 非小细胞肺癌 (NSCLC) 通常会对帕克利塔克塞尔 (PTX) 产生耐药性.
- 耐药性机制包括通过ATP结合盒 (ABC) 载体增强的药物流量和上调的PARP1依赖DNA修复.
- 需要新的策略来克服NSCLC中的PTX耐药性.
研究的目的:
- 构建和评估一种自我组装的纳米药物 (PSOTNs) 以克服NSCLC中的PTX耐药性.
- 在纳米载体中研究将PTX,Olaparib (OLP) 和四甲基pyrazine (TMP) 结合在一起的协同治疗效应.
- 探索由细胞内刺激 (GSH,ROS,酸性pH) 触发的多端药物释放机制.
主要方法:
- 在PTX (二硫化键),OLP (二甲基链接体) 和TMP (疏水性修饰) 的共价结合中形成PSOTN.
- 对药物负载,体稳定性和瘤积累 (EPR效应) 的PSOTNs的表征.
- 在体外评估药物释放,细胞吸收,DNA损伤,细胞循环停止,细胞亡和P-葡萄糖蛋白抑制.
- 在A549/Tax异种移植模型和生物相容性研究中对瘤生长抑制的体内评估.
主要成果:
- PSOTNs显示了高药物负载,稳定性和瘤积累.
- 刺激反应性释放PTX和OLP发生在细胞内,导致微管破坏和DNA修复抑制.
- TMP促进了线粒体的特定向,放大了氧化应激,抑制了药物排放.
- 在实验室中,PSOTNs显著增强了药物积累,诱导了DNA损伤,G2/M停止和亡.
- 在体内,PSOTNs显示出强大的瘤生长抑制,延长血液循环,以及良好的生物相容性.
结论:
- PSOTNs代表了一种新的纳米治疗策略,可以克服NSCLC中的PTX耐药性.
- 三重协同机制涉及微管破坏,DNA修复抑制和线粒体功能干预.
- PSOTNs为治疗耐药性恶性瘤提供了一个有希望的范式.
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