鬼臼毒素是一种天然的芳基四氢木素木质素,具有明显的细胞毒活性。然而,由于其不良的水溶性和选择性,其在癌症治疗中的临床应用受到阻碍。在这项工作中,将生物素作为肿瘤特异性配体与β-环糊精偶联,然后将所得的生物素修饰的β-环糊精与鬼臼毒素复合,以改善其水溶性和肿瘤选择性。与生物素结合后,β-环糊精的溶解度大大提高(> 16倍)。冷冻干燥法制备鬼臼毒素/单6-生物素-氨基-6-脱氧-β-环糊精包合物,研究了单-6-生物素-氨基-6-脱氧-β-环糊精与鬼臼毒素的复合行为。通过水溶解度,相溶解度,乔布斯图,紫外光谱,质子核磁共振,旋转框架Overhauser效应光谱,粉末X射线衍射和扫描电子显微镜。与鬼臼毒素相比,鬼臼毒素/单-6-生物素-氨基-6-脱氧-β-环糊精复合物的溶解度大大提高(9倍)。鬼臼毒素/单-6-生物素-氨基-6-脱氧-β-环糊精复合物的稳定性常数(K s = 415.29 M -1)是鬼臼毒素/β-环糊精复合物的3
Biofunctionalised nanoparticles (NPs) have received increased attention both for their potential use as drug carriers and imaging agents and for their applications in medical diagnostics. Functionalised gold nanoparticles (AuNPs) bring together their unique electronic and optical properties (including strong plasmon absorption bands and enhanced light scattering) with the specific capabilities of the functionalising biological molecule. Cyclodextrins (CDs) have been used to functionalise NPs with different approaches. CDs are able to protect from physical, chemical and enzymatic degradation drugs that are included in their cavity. In this study, we report on a new supramolecular approach for the fabrication of CD-functionalised AuNPs. Particularly, we synthesised streptavidin (SA)-coated NPs modified with biotinylated - and -CD, in order to exploit the interaction with SA.