A nanodrug to combat cisplatin-resistance by protecting cisplatin with p-sulfonatocalix[4]arene and regulating glutathione S-transferases with loaded 5-fluorouracil.

A nanodrug that can effectively combat cisplatin-resistant A549/CDDP cells was developed by protecting cisplatin from glutathione (GSH) detoxification trough a host-guest interaction between cisplatin and p-sulfonatocalix[4]arene. The enzymatic activity of glutathione S-transferases (GSTs) was also regulated by loaded 5-fluorouracil (5-FU).