In the field of drug delivery, controllability of drug release site and duration are among the most important factors to manipulate the drug efficacy and side effects. In this paper, a series of nano-prodrugs (NPs) composed of anticancer agent SN-38 and various substituent groups were synthesized and fabricated. By increasing the hydrophobicity of the prodrug molecule (calculated logP values exceeded ca. 7) through changing the substituent group, the hydrolysis susceptibility of SN-38 NPs in mouse serum was drastically decreased, thus prolonged the blood retention time of the NPs. In light of this knowledge and the dispersion stability in aqueous media, SN-38 NP modified with cholesterol (SN-38-chol NPs) was selected to be the optimal candidate among the screened NPs. The in vivo pharmacological effect of SN-38-chol NP was about 10 times higher than irinotecan, the clinically used solubilized prodrug analog of SN-38. In addition, SN-38-chol NP has low side effects in evaluating intestinal damage. These NPs possess great potential for clinical application and promise to be a next-generation of drug for cancer treatment.
在给药领域,药物释放部位和持续时间的可控性是影响药物疗效和副作用的最重要因素之一。本文合成并制备了一系列由抗癌药物 SN-38 和不同取代基团组成的纳米原药(NPs)。通过改变取代基团增加原药分子的疏
水性(计算的 logP 值超过约 7),SN-38 NPs 在小鼠血清中的
水解敏感性大大降低,从而延长了 NPs 的血液滞留时间。有鉴于此,并考虑到其在
水介质中的分散稳定性,在筛选出的 NPs 中,用
胆固醇修饰的 SN-38 NP(SN-38-chol NPs)被选为最佳候选。SN-38-chol NP 的体内药理作用比临床上使用的 SN-38 可溶性原药类似物
伊立替康高出约 10 倍。此外,在评估肠道损伤方面,SN-38-chol NP 的副作用较小。这些 NPs 具有巨大的临床应用潜力,有望成为治疗癌症的新一代药物。