title: Multifunctional Fe2O3@PPy-PEG nanocomposite for combination cancer therapy with MR imaging.
abstract: In recent years, magnetic hyperthermia nanoparticles have drawn great attention for cancer therapy because they have no limitation of tissue penetration during the therapy process. In this study, cubic nanoporous Fe2O3 nanoparticles derived from cubic Prussian blue nanoparticles were used as magnetic cores to generate heat by alternating the current magnetic field (AMF) for killing cancer cells. In addition, polypyrrole (PPy) was coated on the surfaces of the cubic Fe2O3 nanoparticles to load doxorubicin hydrochloride (DOX). The PEG component was then physically adsorbed onto the surfaces of the nanoparticles, resulting in a Fe2O3@PPy-DOX-PEG nanocomposite. The nanocomposite was triggered by acid stimulus and AMF to release DOX, resulting in a remarkable combination therapeutic effect via chemotherapy and magnetic hyperthermia. Furthermore, the nanocomposite could realize magnetic resonance imaging (MRI) due to the magnetic core structure. The study provides an alternative for the development of new nanocomposites for combination cancer therapy with MR imaging in vivo.
authors.affiliation: Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
authors.forename: Jinghua
authors.initials: J
authors.lastname: Li
authors.forename: Xingwei
authors.initials: X
authors.lastname: Ding
authors.forename: Junjie
authors.initials: J
authors.lastname: Liu
authors.forename: Zhong
authors.initials: Z
authors.lastname: Luo
authors.forename: Yun
authors.initials: Y
authors.lastname: Liu
authors.forename: Qichun
authors.initials: Q
authors.lastname: Ran
authors.forename: Kaiyong
authors.initials: K
authors.lastname: Cai
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000493:pharmacokinetics*; D017209:Apoptosis; D003692:Delayed-Action Preparations; D004317:Doxorubicin / Q000737:chemistry / Q000493:pharmacokinetics; D004337:Drug Carriers / Q000737:chemistry*; D004359:Drug Therapy, Combination; D056945:Hep G2 Cells; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D051379:Mice; D008819:Mice, Nude; D053761:Nanocomposites / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D023041:Xenograft Model Antitumor Assays
chemical_list: D000970:Antineoplastic Agents; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D058185:Magnetite Nanoparticles; D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; D004317:Doxorubicin