Metal-Organic Polyhedron Capped with Cucurbit[8]uril Delivers Doxorubicin to Cancer Cells.

Metal-Organic Polyhedron Capped with Cucurbit[8]uril Delivers Doxorubicin to Cancer Cells.
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金属和有机多面体用葫芦限制[8]将阿霉素延伸到癌细胞。

DOI:
10.1021/jacs.6b09504
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发表时间:
2016-11-02
影响因子:
15
通讯作者:
Isaacs L
Isaacs L
中科院分区:
化学1区
文献类型:
--
作者:
Samanta SK;Moncelet D;Briken V;Isaacs L

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配体 1 和 Pd(NO3)2 的自组装产生藤田型金属有机多面体 (MOP) 3,其外表面上具有 24 个共价连接的甲基紫精单元,1 H NMR、DOSY NMR、电喷雾质谱、TEM 和 AFM 测量证明。 MOP 3 与葫芦[n]脲进行非共价络合,生成直径约 5-6 nm 的 MOP 4 – 6。 MOP 5 可以通过形成异质三元复合物完全负载阿霉素前药 2,生成 7。MOP 在 10 mM 磷酸钠缓冲液中对中性至微酸性 pH 表现出优异的稳定性,从而减轻了循环过程中分解的担忧。 MTS 测定结果表明,MOP 7 对 HeLa 细胞的细胞毒性是等摩尔量的阿霉素前药 2 的 10 倍。流式细胞术和共聚焦荧光显微镜证明,增强的细胞毒性可以追溯到 7 的细胞摄取增强和 DOX 释放的组合。聚阳离子 MOP 结构和即插即用的 CB[n] 络合所赋予的特性的融合为药物输送应用提供了一个强大的新平台。
Self-assembly of ligand 1 and Pd(NO3)2 delivers Fujita-type metal organic polyhedron (MOP) 3 which bears 24 covalently attached methyl viologen units on its external surface as evidenced by 1H NMR, DOSY NMR, electrospray mass spectrometry, TEM, and AFM measurements. MOP 3 undergoes non-covalent complexation with cucurbit[n]urils to yield MOPs 4 – 6 with diameter ≈ 5–6 nm. MOP 5 can be fully loaded with doxorubicin prodrug 2 via hetero ternary complex formation to yield 7. The MOPs exhibit excellent stability toward neutral to slightly acidic pH in 10 mM sodium phosphate buffer mitigating the concern of disassembly during circulation. The results of MTS assays show that MOP 7 is 10-fold more cytotoxic toward HeLa cells than equimolar quantities of doxorubicin prodrug 2. The enhanced cytotoxicity can be traced to a combination of enhanced cellular uptake of 7 and DOX release as demonstrated by flow cytometry and confocal fluorescence microscopy. The confluence of properties imparted by the polycationic MOP architecture and plug-and-play CB[n] complexation provides a potent new platform for drug delivery application.
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