Abstract:
A preparation method of drug delivery system is provided to serve a constant pattern to the system, insert one or various kinds of drugs into the system, and control the drug release from the system by regulating the size and shape of drug delivery system, and the size and shape of pores. A preparation method of drug delivery system(20a) comprises the steps of: mixing drugs and polymer to prepare a drug-polymer composite(10,12); establishing the shape of drug delivery system containing the drug-polymer composite; filing the drug-polymer composite into a disperser(110); and pouring the drug-polymer composite from the dispenser to an X-Y table(120) along a certain pathway, wherein the X-Y table moves on a horizontal plane, and the dispenser moves perpendicularly to the horizontal plane; and the shape of drug delivery system has scaffold structure. Further, the drug delivery system has a scaffold structure.
Abstract:
A core-shell gold nanoparticle containing magnetic nanoparticles is provided to improve image clearness of MRI(magnetic resonance image) as MRI T2 contrast agent, and efficiency of cancer diagnosis, and rapidly kill the cancer cells by using laser pulse, so that diagnosis and treatment of cancer are performed simultaneously. A core-shell gold nanoparticle contains a silica core having diameter of 50-500 nm and a gold nanoshell having diameter of 50-500 nm with magnetic nanoparticles having diameter of 2-30 nm which contains polyalkylene glycol on the surface of nanoparticles and a target-directing ligand linked to the polyalkylene glycol, wherein the magnetic nanoparticle is selected from magnetite(Fe3O4), maghemite(gamma-Fe3O4), cobalt ferrite(CoFe2O4), manganese oxide(MnO), manganese ferrite(MnFe2O4), ion-platinum alloy, cobalt-platinum alloy and cobalt; the target-directing ligand is selected from anti-HER2/neu, folate, aptamer and TAT peptide.