Hypoxia-targeting dendritic MRI contrast agent based on internally hydroxy dendrimer for tumor imaging

Hypoxia is one of the critical features in solid tumors, and hypoxia-targeting contrast agents (CAs) could greatly enhance the magnetic resonance imaging (MRI) of tumors by increasing its specificity and providing more diagnosis information. In this article, an internally hydroxy dendrimer of high molecular weight was facilely synthesized by "epoxy-amine" and "thiol-ene" reactions with a β-cyclodextrin (β-CD) as the core, and a hypoxia-targeting...