title: Mechanochemically activated doxorubicin nanoparticles in combination with 40 MHz frequency irradiation on A-549 lung carcinoma cells.
abstract: Targeting of mechanochemically activated doxorubicin (MA DOXO) nanoparticles, conventional doxorubicin, and electromagnetic irradiation (EMI) at A-549 lung carcinoma cells in vitro was investigated. Conventional DOXO was micronized using an input energy of 20 W/g for 5 min resulting in positively charged MA DOXO particles 10 times smaller than conventional DOXO. Mechanochemical activation gives rise to additional free quinone radicals. High performance liquid chromatograph analyses demonstrate that conventional and MA DOXO are quantitatively similar. Tumor cells were exposed to 40 MHz electromagnetic irradiation at a power density of 2 W/cm2. The lethal dose LD50 values of MA DOXO were 5 times greater than conventional doxorubicin. MA DOXO in combination with EMI at 37 degrees C demonstrates improved drug delivery to A-549 human lung carcinoma and greater cell kill than does conventional DOXO.
authors: Physics-Technical Department, Institute of Oncology, Academy of Medical Sciences, Kyiv, Ukraine. orel@ucr.kiev.ua
authors: V E
authors: VE
authors: Orel
authors: Yu I
authors: YI
authors: Kudryavets
authors: S
authors: S
authors: Satz
authors: N A
authors: NA
authors: Bezdenezhnih
authors: M L
authors: ML
authors: Danko
authors: N N
authors: NN
authors: Khranovskaya
authors: A V
authors: AV
authors: Romanov
authors: N N
authors: NN
authors: Dzyatkovskaya
authors: A P
authors: AP
authors: Burlaka
mesh_terms: D000465:Algorithms; D000903:Antibiotics, Antineoplastic / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects / Q000528:radiation effects; D002453:Cell Cycle / Q000187:drug effects / Q000528:radiation effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects* / Q000528:radiation effects*; D002470:Cell Survival / Q000187:drug effects / Q000528:radiation effects; D002851:Chromatography, High Pressure Liquid; D004305:Dose-Response Relationship, Drug; D004317:Doxorubicin / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology*; D016503:Drug Delivery Systems / Q000379:methods; D004574:Electromagnetic Fields; D004578:Electron Spin Resonance Spectroscopy; D017709:Fractals; D005609:Free Radicals / Q000737:chemistry; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy / Q000473:pathology / Q000532:radiotherapy; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D011208:Powders
chemical_list: D000903:Antibiotics, Antineoplastic; D005609:Free Radicals; D011208:Powders; D004317:Doxorubicin