膜透性和响应性驱动性能:将结构特征与多克索鲁比负载刺激触发的聚合体的抗瘤有效性联系起来
Eliézer Jäger1, Peter Černoch1, Martina Vragovic1
1Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague 162 00, Czech Republic.
Biomacromolecules
|June 25, 2024
概括
装载着多克索鲁比 (DOX) 的pH反应性聚合体显示出增强的抗瘤活性. 这是由于在酸性瘤环境中触发了药物释放,超过了不响应和反应性氧物种 (ROS) 响应的对应物.
科学领域:
- 聚合物科学和纳米技术
- 生物医学工程 生物医学工程
- 药物输送系统 药物输送系统
背景情况:
- 聚合物体的设计,以有效的货物交付,取决于膜的透性和响应性.
- 刺激响应的聚合体在特定的生物环境中具有针对性药物释放的潜力.
- doxorubicin (DOX) 是一种广泛使用的化疗剂,其疗效可以通过先进的输送系统来提高.
研究的目的:
- 为了将多克索鲁比辛载荷聚合体的结构特征,透性和响应性与它们的抗瘤性能相关联.
- 评估和比较非响应性,ROS响应性和pH响应性聚合体的体外和体内抗瘤疗效.
- 阐明各种聚合体配方的性能差异背后的机制.
主要方法:
- 与水友性PHPMA和不同的响应性/非响应性块 (PPPhA,PbAPE,PDPA) 合成两性块共聚物.
- 使用这些共聚合物制造用多克索鲁素载荷的聚合体.
- 在体外和体内评估聚合体性能,包括瘤模型中的药物释放动力学和抗瘤活性.
主要成果:
- 与其他配方相比,基于PDPA (pH响应) 的聚合体表现出优越的生物性能和增强的抗瘤活性.
- 在酸性瘤环境中观察到快速触发的多克索鲁比辛释放 (pH < 6.8),这是由于pH响应的聚合体分解.
- 响应ROS的聚合体显示减弱降解,不响应的聚合体显示有效性有限,可能是由于ROS不足或固有的不响应.
结论:
- 响应pH的聚合体对多克索鲁比的输送非常有效,显示出显著的抗瘤活性.
- 酸性瘤微环境对于触发pH响应的聚合体中的药物释放至关重要.
- 聚合体的响应性在确定癌症治疗的体内治疗结果方面发挥着关键作用.
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