title: Co-delivery of oxaliplatin and demethylcantharidin via a polymer-drug conjugate.
abstract: A Pt (IV) complex which combined the bioactivities of both oxaliplatin and demethylcantharidin (DMC) is synthesized and delivered by a polymer-drug conjugate for combination chemotherapy. Oxaliplatin is released from the polymer-drug conjugate within cancer cell by reduction to attack nuclear DNA, while a dose of DMC is also hydrolyzed subsequently to block DNA damage-induced defense mechanisms by serine/threonine phosphatase 2A (PP2A) inhibition. In vitro evaluation shows that the polymer-drug conjugate with dual modes of action upon cancer cells displays higher cytotoxicity against SKOV-3 cells than that of free drugs. This enhanced cytotoxicity is attributed to the synergistic effect between oxaliplatin and DMC, as well as the effective intracellular internalization of the micelles observed by confocal laser scanning microscopy (CLSM) imaging.
authors.affiliation: Department of Orthodontics, Faculty of Stomatology, Jilin University, Changchun, 130021, P. R. China.
authors.forename: Enhui
authors.initials: E
authors.lastname: Wang
authors.forename: Hejian
authors.initials: H
authors.lastname: Xiong
authors.forename: Dongfang
authors.initials: D
authors.lastname: Zhou
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Xie
authors.forename: Yubin
authors.initials: Y
authors.lastname: Huang
authors.forename: Xiabin
authors.initials: X
authors.lastname: Jing
authors.forename: Xinhua
authors.initials: X
authors.lastname: Sun
mesh_terms: D002193:Cantharidin / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000737:chemistry; D045744:Cell Line, Tumor / Q000187:drug effects / Q000648:ultrastructure; D006801:Humans; D008823:Micelles; D018613:Microscopy, Confocal; D009369:Neoplasms / Q000188:drug therapy* / Q000473:pathology; D009944:Organoplatinum Compounds / Q000008:administration & dosage* / Q000737:chemistry; D000077150:Oxaliplatin; D011108:Polymers / Q000008:administration & dosage* / Q000737:chemistry
chemical_list: D008823:Micelles; D009944:Organoplatinum Compounds; D011108:Polymers; C464435:demethylcantharidin; D000077150:Oxaliplatin; D002193:Cantharidin
keywords: PP2A inhibition; co-delivery; combination chemotherapy; oxaliplatin; polymer-drug conjugate