Pt(II)-PLGA Hybrid in a pH-Responsive Nanoparticle System Targeting Ovarian Cancer.

Pt(II)-PLGA Hybrid in a pH-Responsive Nanoparticle System Targeting Ovarian Cancer.
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DOI:
10.3390/pharmaceutics15020607
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发表时间:
2023-02-10
期刊:
影响因子:
5.4
通讯作者:
Mieszawska AJ
Mieszawska AJ
中科院分区:
医学2区
文献类型:
--
作者:
Wlodarczyk MT;Dragulska SA;Chen Y;Poursharifi M;Acosta Santiago M;Martignetti JA;Mieszawska AJ

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铂类药物是卵巢癌 (OC) 的主要治疗选择。在此,我们报道了一种封装铂 (II) 的聚乳酸-乙醇酸 (PLGA) 纳米颗粒 (NP),其靶向在 90% 以上的晚期 OC 中过表达的细胞跨蛋白,即粘蛋白 1 (MUC1)。 NP 涂有针对 MUC1 的磷脂-DNA 适体和含有酸不稳定腙键的 pH 敏感 PEG 衍生物。 pH 敏感的 PEG 充当开关,在生理 pH 值下提供屏蔽作用,并在较低 pH 值下脱落,从而暴露 MUC1 配体。 pH-MUC1-Pt NP 在血清中稳定,并表现出 pH 依赖性 PEG 裂解和药物释放。此外,NPs 可以有效地内化到 OC 细胞中,并在较低 pH 值下具有更高的积累量。通过 PLGA-Pt (II) 配位化学将 Pt (II) 负载到 NP 中,结果发现负载量为 1.62 wt.%。使用一组 OC 细胞系进行的体外筛选表明,pH-MUC1-Pt NP 在降低细胞活力方面比卡铂(一种临床相关药物类似物)具有更大的效果。生物分布研究表明,通过有效的 Pt (II) 递送,NP 在肿瘤部位积累。总之,这些结果表明 pH-MUC1-Pt NP 对于 OC 和目前使用铂类药物治疗的其他实体瘤的增强 Pt (II) 治疗具有潜力。
Platinum-based agents are the main treatment option in ovarian cancer (OC). Herein, we report a poly(lactic-co-glycolic acid) (PLGA) nanoparticle (NP) encapsulating platinum (II), which is targeted to a cell-spanning protein overexpressed in above 90% of late-stage OC, mucin 1 (MUC1). The NP is coated with phospholipid-DNA aptamers against MUC1 and a pH-sensitive PEG derivative containing an acid-labile hydrazone linkage. The pH-sensitive PEG serves as an off–on switch that provides shielding effects at the physiological pH and is shed at lower pH, thus exposing the MUC1 ligands. The pH-MUC1-Pt NPs are stable in the serum and display pH-dependent PEG cleavage and drug release. Moreover, the NPs effectively internalize in OC cells with higher accumulation at lower pH. The Pt (II) loading into the NP was accomplished via PLGA-Pt (II) coordination chemistry and was found to be 1.62 wt.%. In vitro screening using a panel of OC cell lines revealed that pH-MUC1-Pt NP has a greater effect in reducing cellular viability than carboplatin, a clinically relevant drug analogue. Biodistribution studies have demonstrated NP accumulation at tumor sites with effective Pt (II) delivery. Together, these results demonstrate a potential for pH-MUC1-Pt NP for the enhanced Pt (II) therapy of OC and other solid tumors currently treated with platinum agents.
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