title: Doxorubicin-loaded magnetic gold nanoshells for a combination therapy of hyperthermia and drug delivery.
abstract: In the present work, nanohybrid of an anticancer drug, doxorubicin (Dox) loaded gold-coated superparamagnetic iron oxide nanoparticles (SPIONs@Au) were prepared for a combination therapy of cancer by means of both hyperthermia and drug delivery. The Dox molecules were conjugated to SPIONs@Au nanoparticles with the help of cysteamine (Cyst) as a non-covalent space linker and the Dox loading efficiency was investigated to be as high as 0.32 mg/mg. Thus synthesized particles were characterized by HRTEM, UV-Vis, FT-IR, SQUID magnetic studies and further tested for heat and drug release at low frequency oscillatory magnetic fields. The hyperthermia studies investigated to be strongly influenced by the applied frequency and the solvents used. The Dox delivery studies indicated that the drug release efficacy is strongly improved by maintaining the acidic pH conditions and the oscillatory magnetic fields, i.e. an enhancement in the Dox release was observed from the oscillation of particles due to the applied frequency, and is not effected by heating of the solution. Finally, the in vitro cell viability and proliferation studies were conducted using two different immortalized cell lines containing a cancerous (MCF-7 breast cancer) and non-cancerous H9c2 cardiac cell type.
authors.affiliation: Institute of Advanced Technology, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; Environmental Toxicology, Southern University and A&M College, Baton Rouge, LA 70813, USA. Electronic address: faruq_m@upm.edu.my.
authors.forename: Faruq
authors.initials: F
authors.lastname: Mohammad
authors.affiliation: Institute of Advanced Technology, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia.
authors.forename: Nor Azah
authors.initials: NA
authors.lastname: Yusof
mesh_terms: D001943:Breast Neoplasms / Q000473:pathology / Q000628:therapy*; D002460:Cell Line; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D004317:Doxorubicin / Q000008:administration & dosage* / Q000627:therapeutic use; D016503:Drug Delivery Systems / Q000379:methods; D005260:Female; D006046:Gold / Q000737:chemistry / Q000627:therapeutic use*; D006801:Humans; D006979:Hyperthermia, Induced / Q000379:methods; D060328:Magnetic Phenomena; D058185:Magnetite Nanoparticles / Q000737:chemistry / Q000627:therapeutic use*; D057145:Nanoshells / Q000737:chemistry / Q000627:therapeutic use*
chemical_list: D058185:Magnetite Nanoparticles; D006046:Gold; D004317:Doxorubicin
keywords: Core-shell type; Doxorubicin; Drug delivery; Hyperthermia; SPIONs@Au; Superparamagnetism