Abstract:
PURPOSE: A polynucleotide delivering complex containing RVG peptide-conjugated cationic polymers is provided to effectively and safely deliver polynucleotides to target cells. CONSTITUTION: A polynucleotide delivering complex contains RVG(rabies virus glycoprotein) peptide-conjugated cationic polymers. The polymers have ester bond, amide bond, disulfice bond, phosphate bond, or combination thereof. The cationic polymers are polyethylene imine(PEI), poly-L-lysine(PLL), chitosan, or dendrimer. The polynucleotide delivering complex has non-peptidyl polymers between the RVG peptide and cationic polymers. The non-peptidyl polymers are polyethylene glycol.
Abstract:
PURPOSE: A polymer delivery system which controls and releases nitrogen monoxide is provided to stably supply nitrogen monoixde for a long time. CONSTITUTION: A delivery system for controlled-release of nitrogen monoxide is a polymer containing a main chain of organic polymers and a sub-chain which is connected to the main chain by covalent bond and has a diazenium diolate functional group. The polymer causes phase change from sol to gel in case of increasing temperature. The main chain is formed of ethylene glycol/propylene glycol copolymers. The sub-chain is formed of polyethylene imine, polypropylene imine, polypeptide, or chitosan polymers.
Abstract:
PURPOSE: A gene carrier is provided to ensure low toxicity due to the low molecular weight of polyethyleneimine and to improve the efficiency of a gene transfer protecting a transferred gene. CONSTITUTION: A compound or its salts or ester compounds have a structure represented by chemical formula (1). In chemical formula (1), n is an integer of 1-4; m is a repeating unit of a different or identical integer; k is an integer of 1-8; at least a part of X is -NH-A and the rest is -OH; A is -CH2CH2-(NHCH2CH2)Z-NHCH2CH2NH2; and Z is a repeating unit of an integer.
Abstract:
PURPOSE: A manufacturing method of membrane is provided to form nanopores necessary for DNA analysis by introducing specific functional group on a wall of nanopores. CONSTITUTION: A membrane comprises a supporting member(100) and a polymer layer(200). The polymer layer is located above the supporting member, and comprises multiple nanopores(80). The multiple nanopores have inner walls, and the walls are comprised of polymer material of `end substituted with functional group` block structure. The functional group may be one of -COOH, -NH2, and -SH. The block structure of polymer material may be PMMA block(60). The membrane manufacturing method comprises the following steps. The alignment layer is formed into PS-ran-PMMA on the substrate including the sacrificing layer. The solution including PS-b-PMMA-diCOOH is applied on the alignment layer to form the polymer layer. The polymer layer is dipped in the acetic acid to form multiple nanopores on the polymer layer with `PMMA block as inner wall.
Abstract:
PURPOSE: A supramolecular complex for effectively delivering polynucleotides to target cells by forming a polyplex is provided. CONSTITUTION: A supramolecular complex for delivering polynucleotides to target cells contains oligoamine-linked carbohydrate and ligand-linked cucurbituril. The oligoamine is spermine, spermidine, putrescine, 1,6-diaminohexane, 1,5-diaminopentane, adamantane, metallocene, or mixture thereof. The ligand is galactose, mannose, glucose, N-acetylglucosamine, lactose, transferrine, citric acid, or mixture thereof.
Abstract:
PURPOSE: An intracellular gene delivery intracellular gene delivery containing cationic polymers and magnetic nanoaprticels is provided to treat various diseases using a gene. CONSTITUTION: An intracellular gene delivery composite contains cationic polymers of 1000-10,000 Da of molecular weight and magnetic nanoparticles. The cationic polymers are polyethylene imine(PEI), poly-L-lysine(PLL), or chitosan. The magnetic nanoparticles are thermally cross-linked superparamagnetic nanoparticles(TCL-SPION). The intracellular gene delivery composite is prepared by cross-linking of the cationic polymers and magnetic nanoparticles under the presence of -ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride(EDC) and N-hydroxysuccineimide(NHS).