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Host-Guest Interactions between Oxaliplatin and Cucurbit[7]uril/Cucurbit[7]uril Derivatives under Pseudo-Physiological Conditions.
Langmuir ( IF 3.7 ) Pub Date : 2020-01-27 , DOI: 10.1021/acs.langmuir.9b03325
Han Wu 1 , Hao Chen 1 , Bohan Tang 1 , Yuetong Kang 1 , Jiang-Fei Xu 1 , Xi Zhang 1
Affiliation  

Compared with conventional drug delivery systems (DDSs), DDSs based on host-guest interactions possess unique advantages, such as high selectivity, tunable binding ability, and controllable release of drugs. It is important to study the host-guest interactions between the carrier and drug under physiological conditions for constructing DDSs. In this work, we have studied the host-guest interaction between cucurbit[7]uril (CB[7]) and oxaliplatin (OxPt), a clinical antitumor drug, in the cell culture medium. The results show that amino acids such as phenylalanine in the 1640 culture medium can partially occupy the cavity of CB[7], which leads to the decrease of enthalpy changes of the host-guest interaction between OxPt and CB[7]. In addition, inorganic salts such as NaCl in the medium reduce the enthalpy change and increase the entropy change of the binding because of the preorganization of the portal of CB[7] and sodium cation. As a result, the binding constant of CB[7] with OxPt in the 1640 culture medium is 1/20 of that in pure water. When CB[7] is modified at the terminal of star-type PEG to construct the star-PEGylated CB[7], it is shown that the molecular weight and topological structure of the PEG polymer backbone exhibit little effect on the host-guest interactions between CB[7] and OxPt. This study enriches the host-guest chemistry of cucurbiturils and may provide guidance for constructing novel DDSs based on host-guest interactions with high loading and releasing efficiency.

中文翻译:

在假生理条件下,奥沙利铂和葫芦[7]尿/葫芦[7]尿的衍生物之间的主客体相互作用。

与传统的药物递送系统(DDS)相比,基于宿主-客体相互作用的DDS具有独特的优势,例如高选择性,可调节的结合能力和可控的药物释放。研究在生理条件下载体与药物之间的宿主-客体相互作用对于构建DDS很重要。在这项工作中,我们研究了细胞培养基中葫芦科[7]尿嘧啶(CB [7])和临床抗肿瘤药奥沙利铂(OxPt)之间的宿主-客体相互作用。结果表明,1640培养基中的氨基酸如苯丙氨酸可以部分占据CB的腔[7],这导致OxPt与CB之间的宿主-客体相互作用的焓变降低[7]。此外,无机盐(例如NaCl)在介质中会降低焓变并增加结合的熵变,这是由于CB [7]和钠阳离子的门的预组织所致。结果,在1640培养基中CB [7]与OxPt的结合常数是纯水中结合常数的1/20。当在星形PEG末端修饰CB [7]以构建星形PEG化CB [7]时,表明PEG聚合物主链的分子量和拓扑结构对宿主-客体相互作用几乎没有影响在CB [7]和OxPt之间。这项研究丰富了葫芦科的主客体化学,并可以为基于高客体和高释放效率的主客体相互作用构建新型DDS提供指导。CB [7]与OxPt在1640培养基中的结合常数是纯水中的1/20。当在星形PEG末端修饰CB [7]以构建星形PEG化CB [7]时,表明PEG聚合物主链的分子量和拓扑结构对宿主-客体相互作用几乎没有影响在CB [7]和OxPt之间。这项研究丰富了葫芦科的主客体化学,并可以为基于高客体和高释放效率的主客体相互作用构建新型DDS提供指导。CB [7]与OxPt在1640培养基中的结合常数是纯水中的1/20。当在星形PEG末端修饰CB [7]以构建星形PEG化CB [7]时,表明PEG聚合物主链的分子量和拓扑结构对宿主-客体相互作用几乎没有影响在CB [7]和OxPt之间。这项研究丰富了葫芦科的主客体化学,并可以为基于高客体和高释放效率的主客体相互作用构建新型DDS提供指导。结果表明,PEG聚合物主链的分子量和拓扑结构对CB [7]和OxPt之间的客体相互作用几乎没有影响。这项研究丰富了葫芦科的主客体化学,并可以为基于高客体和高释放效率的主客体相互作用构建新型DDS提供指导。结果表明,PEG聚合物主链的分子量和拓扑结构对CB [7]和OxPt之间的客体相互作用几乎没有影响。这项研究丰富了葫芦科的主客体化学,并可以为基于高客体和高释放效率的主客体相互作用构建新型DDS提供指导。
更新日期:2020-01-29
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