Abstract:
The present invention relates to a nanocomplex in which the fluorescence and reactive oxygen generation are activated by the action of a specific enzyme overexpressed in cancer cells, and more specifically, to a graphene oxide/biopolymer-photosensitizer nanocomplex for a cancer cell selective fluorescence image or photothermal treatment which is obtained by combining graphene oxide to a responsive binder. The graphene oxide/biopolymer-photosensitizer anocomplex according to the present invention selectively reacts to an enzyme expressed in the cancer cells and generates a strong fluorescence signal, and generates reactive oxygen species and heat. Therefore, the graphene oxide/biopolymer-photosensitizer anocomplex according to the present invention can be applied to not only the fluorescence image diagnosis but also the photodynamic/photothermal treatment of cancer. [Reference numerals] (AA,BB) Light; (CC) Biopolymer-photosensitizer binder; (DD) Graphene oxide
Abstract:
PURPOSE: A composition for photodynamic therapy or diagnosis containing photosensitizer-metallic nanoparticle complex is provided to suppress reactive oxygen species. CONSTITUTION: A photosensitizer-metallic nanoparticle complex contains a photosensitizer, metallic nanoparticles, and back bone which connects the photosensitizer and metallic nanoparticles and has a polypeptide substrate. The polypeptide substrate has an amino acid containing RPLALWRS(sequence number 1[SEQ ID NO:1]), GGLGQRGRSANAILE(sequence nubmer 2), GVSQNYPIVG(sequence number 3), LVLASSSFGY(sequence nubmer 4), PLGMWSR(sequence number 5), PGNWT(sequence number 6), PAGLLGC(sequence number 7), LGGSGRSANAILE(sequence number 8), RR, RRG, GPICFFRLG (sequence number 9), HSSKLQG (sequence number 10), PIC(Et)FF (sequence number 11), HSSKLQ (sequence number 12), P(L/Q)G(I/L)AG (sequence number 13), GVVQASCRLA (sequence number 14), KK, PLGVRG(sequence number 15), or LR.
Abstract:
The present invention relates to a redox-responsive polymer-photosensitizer conjugate containing disulfide linkers which include disulfide bonds capable of performing cancer cell selective fluorescence imaging or photodynamic therapy by activating fluorescence and reactive oxygen production using a reducing agent. The polymer-photosensitizer conjugate bonded by the disulfide linkers suppresses fluorescence and reactive oxygen production by energy transfer between photosensitizers bonded by the polymers outside the normal tissues and cancer cells, and expresses strong fluorescence signals and cytotoxicity while producing reactive oxygen species when disulfide bonds are cut by intracellular reducing agent after being targeted and accumulated in cancer tissue or cancer cells. Therefore, production of fluorescence and reactive oxygen is activated only when the conjugate is entered into the cancer cells so that side effects can be reduced and cancer selective fluorescence imaging and photodynamic therapy can be performed.
Abstract:
PURPOSE: Positively charged superparamagnetic iron oxide nano-particle, a contrasting agent using the same, and a method for manufacturing the same are provided to improve the reproducibility of the iron oxide nano-particles by modifying the surface of the iron oxide nano-particles into polymer with a plurality of carboxylic groups. CONSTITUTION: Positively charged superparamagnetic iron oxide nano-particles(10) are prepared. A polymer layer(12) is coated on the surfaces of the iron oxide nano-particles. Cationoid(14) is amide-bonded with the surface of the polymer layer. The polymer layer contains a plurality of carboxylic groups. A contrasting agent includes the superparamagnetic iron oxide nano-particles. A method for manufacturing the iron oxide nano-particles includes the following: the iron oxide nano-particles are prepared; the surfaces of the iron oxide nano-particles are coated with hydrophobic ligand; the hydrophobic ligand is substituted with polymer containing a plurality of carboxylic groups to form a hydrophilic polymer layer; and the carboxylic groups are reacted with amine-group containing the cationoid to form amide bonds.
Abstract:
PURPOSE: A fluorescent indication clip for surgery is provided to rapidly and easily find the exact location of the internal part of a surgical target. CONSTITUTION: A fluorescent indication clip(100) for surgery comprises a clip main body(110), a fluorescent indication part(120), and a clamping part(130). The clip body has a property for self spreading. The clamping part is slid from a base part to the clip body with an external force and tightens the leading end of the clip body. The clip body is made of a material in which the photo reactive fluorescent material is mixed. The photo reactive fluorescent material is coated on the surface of the clip body.