| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1229802 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2016 | 8 Pages |
•Oxaliplatin complexes with β-CD, γ-CD and HP-β-CD were prepared and characterized.•The oxaliplatin/β-CD complex is more stable than free oxaliplatin, oxaliplatin/HP-β-CD and oxaliplatin/γ-CD.•By complexation with cyclodextrins, the water solubility of oxaliplatin was improved.•The complexes enhanced antitumor activities in vivo against HCT116 and MCF-7 cells.
Three water-soluble oxaliplatin complexes were prepared by inclusion complexation with β-cyclodextrin (β-CD), γ-CD and HP-β-CD. The structures of oxaliplatin/CDs were confirmed by NMR, FTIR, TGA, XRD as well as SEM analysis. The results show that the water solubility of oxaliplatin was increased in the complex with CDs in 1:1 stoichiometry inclusion modes, and the cyclohexane ring of oxaliplatin molecule was deeply inserted into the cavity of CDs. Moreover, the stoichiometry was established by a Job plot and the water stability constant (Kc) of oxaliplatin/CDs was calculated by phase solubility studies, all results show that the oxaliplatin/β-CD complex is more stable than free oxaliplatin, oxaliplatin/HP-β-CD and oxaliplatin/γ-CD. Meanwhile, the inclusion complexes displayed almost twice as high cytotoxicity compared to free oxaliplatin against HCT116 and MCF-7 cells. This satisfactory water solubility and higher cytotoxic activity of the oxaliplatin/CD complexes will potentially be useful for their application in anti-tumour therapy.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
