
pmid: 26001074
We have developed methotrexate (MTX)-loaded poly(lactic-co-glycolic acid, PLGA) gold (Au)/iron (Fe)/gold (Au) half-shell nanoparticles conjugated with arginine-glycine-aspartic acid (RGD), which can be applied for magnetic targeted chemo-photothermal treatment, and in vivo multimodal imaging of rheumatoid arthritis (RA). Upon near-infrared (NIR) irradiation, local heat is generated at the inflammation region due to the NIR resonance of Au half-shells and MTX release from PLGA nanoparticles is accelerated. The Fe half-shell layer embedded between the Au half-shell layers enables in vivo T2-magnetic resonance (MR) imaging in addition to NIR absorbance imaging. Furthermore, the delivery of the nanoparticles to the inflammation region in collagen-induced arthritic (CIA) mice, and their retention can be enhanced under external magnetic field. When combined with consecutive NIR irradiation and external magnetic field application, these nanoparticles provide enhanced therapeutic effects with an MTX dosages of only 0.05% dosage compared to free MTX therapy for the treatment of RA.
rheumatoid arthritis, Male, Metal Nanoparticles/chemistry*, Light, Rheumatoid/pathology*, Contrast Media, Metal Nanoparticles, Nanocapsules/chemistry, Arthritis, Rheumatoid, Diffusion, Mice, Photosensitizing Agents/administration & dosage, Antirheumatic Agents/administration & dosage, Metal Nanoparticles/ultrastructure, Nanocapsules/therapeutic use*, Contrast Media/chemical synthesis, Nanocapsules/radiation effects, Combined Modality Therapy, Molecular Imaging, Surface Plasmon Resonance/methods, Gold/chemistry, Treatment Outcome, Drug-loaded Au plasmonic nanoparticles, Combined Modality Therapy/methods, Mice, Inbred DBA, Methotrexate/chemistry, Antirheumatic Agents, Delayed-Action Preparations/chemical synthesis, Molecular Imaging/methods, multidrug resistance in cancer, Methotrexate/administration & dosage*, photothermally controlled drug delivery, Iron, Delayed-Action Preparations/administration & dosage, chemo-photothermal treatment, 610, Rheumatoid/drug therapy*, Nanocapsules, Theranostic Nanomedicine/methods, Inbred DBA, Animals, Particle Size, Arthritis, Iron/therapeutic use, Drug-loaded Au/Fe/Au plasmonic nanoparticles, Photosensitizing Agents/chemistry, Magnetic Fields, Methotrexate, Iron/chemistry, Photochemotherapy, Delayed-Action Preparations, Photochemotherapy/methods*, Gold/therapeutic use, Gold
rheumatoid arthritis, Male, Metal Nanoparticles/chemistry*, Light, Rheumatoid/pathology*, Contrast Media, Metal Nanoparticles, Nanocapsules/chemistry, Arthritis, Rheumatoid, Diffusion, Mice, Photosensitizing Agents/administration & dosage, Antirheumatic Agents/administration & dosage, Metal Nanoparticles/ultrastructure, Nanocapsules/therapeutic use*, Contrast Media/chemical synthesis, Nanocapsules/radiation effects, Combined Modality Therapy, Molecular Imaging, Surface Plasmon Resonance/methods, Gold/chemistry, Treatment Outcome, Drug-loaded Au plasmonic nanoparticles, Combined Modality Therapy/methods, Mice, Inbred DBA, Methotrexate/chemistry, Antirheumatic Agents, Delayed-Action Preparations/chemical synthesis, Molecular Imaging/methods, multidrug resistance in cancer, Methotrexate/administration & dosage*, photothermally controlled drug delivery, Iron, Delayed-Action Preparations/administration & dosage, chemo-photothermal treatment, 610, Rheumatoid/drug therapy*, Nanocapsules, Theranostic Nanomedicine/methods, Inbred DBA, Animals, Particle Size, Arthritis, Iron/therapeutic use, Drug-loaded Au/Fe/Au plasmonic nanoparticles, Photosensitizing Agents/chemistry, Magnetic Fields, Methotrexate, Iron/chemistry, Photochemotherapy, Delayed-Action Preparations, Photochemotherapy/methods*, Gold/therapeutic use, Gold
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