title: A folate-integrated magnetic polymer micelle for MRI and dual targeted drug delivery.
abstract: This paper devotes a novel micellar structure for cancer theranostics by incorporating magnetic and therapeutic functionalities into a natural sourced targeting polymer vehicle. Heparin-folic acid micelles taking advantage of both excellent loading capability and cancer targeting ability have been employed to simultaneously incorporate superparamagnetic iron oxide nanoparticles (SPIONs) and doxorubicin through an ultrasonication-assisted microemulsion method. In this system, folic acids not only take the responsibility of micelle construction, but also facilitate cellular uptake due to their specific reorganization by MCF-7 cells over-expressing folate receptors. The obtained micelles exhibit good colloidal stability, a high magnetic content, considerable drug loading and sustained in vitro drug release. These clustered SPIONs exhibited high r2 relaxivity (243.65 mM(-1) s(-1)) and further served as efficient probes for MR imaging. Notably, the transport efficiency of these micelles could be significantly improved under an external magnetic field, owing to their quick magnetic response. As a result, the as-proposed micelle shows great potential in multimodal theranostics, including active targeting, MRI diagnosis and drug delivery.
authors.affiliation: Guangdong Key Laboratory of Nanomedicine, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China. wu.su@siat.ac.cn.
authors.forename: Lijiao
authors.initials: L
authors.lastname: Ao
authors.forename: Bi
authors.initials: B
authors.lastname: Wang
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Liang
authors.initials: L
authors.lastname: Huang
authors.forename: Caixia
authors.initials: C
authors.lastname: Yue
authors.forename: Duyang
authors.initials: D
authors.lastname: Gao
authors.forename: Chunlei
authors.initials: C
authors.lastname: Wu
authors.forename: Wu
authors.initials: W
authors.lastname: Su
mesh_terms: D000903:Antibiotics, Antineoplastic / Q000737:chemistry / Q000633:toxicity; D002470:Cell Survival / Q000187:drug effects; D004317:Doxorubicin / Q000737:chemistry / Q000633:toxicity; D004337:Drug Carriers / Q000737:chemistry*; D052203:Ferrosoferric Oxide / Q000737:chemistry; D005492:Folic Acid / Q000737:chemistry*; D006801:Humans; D061986:MCF-7 Cells; D008279:Magnetic Resonance Imaging; D058185:Magnetite Nanoparticles / Q000737:chemistry; D008823:Micelles; D018613:Microscopy, Confocal; D009369:Neoplasms / Q000175:diagnosis; D011108:Polymers / Q000737:chemistry*
chemical_list: D000903:Antibiotics, Antineoplastic; D004337:Drug Carriers; D058185:Magnetite Nanoparticles; D008823:Micelles; D011108:Polymers; D004317:Doxorubicin; D005492:Folic Acid; D052203:Ferrosoferric Oxide