The computation of lipophilicities of 64Cu PET systems based on a novel approach for fluctuating charges
作者:Peter Comba、Bodo Martin、Avik Sanyal、Holger Stephan
DOI:10.1039/c3dt51049b
日期:——
A QSPR scheme for the computation of lipophilicities of 64Cu complexes was developed with a training set of 24 tetraazamacrocylic and bispidine-based CuII compounds and their experimentally available 1-octanol–water distribution coefficients. A minimum number of physically meaningful parameters were used in the scheme, and these are primarily based on data available from molecular mechanics calculations, using an established force field for CuII complexes and a recently developed scheme for the calculation of fluctuating atomic charges. The developed model was also applied to an independent validation set and was found to accurately predict distribution coefficients of potential 64Cu PET (positron emission tomography) systems. A possible next step would be the development of a QSAR-based biodistribution model to track the uptake of imaging agents in different organs and tissues of the body. It is expected that such simple, empirical models of lipophilicity and biodistribution will be very useful in the design and virtual screening of positron emission tomography (PET) imaging agents.
利用由 24 种四氮杂环己烷和双脒基 CuII 化合物组成的训练集及其实验获得的 1-辛醇-水分配系数,开发了一种用于计算 64Cu 复合物亲油性的 QSPR 方案。该方案使用了最少的有物理意义的参数,这些参数主要基于分子力学计算中获得的数据,使用了已建立的 CuII 复合物力场和最近开发的波动原子电荷计算方案。开发的模型还被应用于一个独立的验证集,结果发现该模型能准确预测潜在的 64Cu PET(正电子发射断层扫描)系统的分布系数。下一步可能是开发基于 QSAR 的生物分布模型,以跟踪成像剂在人体不同器官和组织中的吸收情况。预计这种简单的亲脂性和生物分布经验模型将对正电子发射断层成像剂的设计和虚拟筛选非常有用。