摘要:
The present invention provides a cationic lipid, which allow nucleic acids to be easily introduced into cells, represented by formula (I) (wherein: R 1 and R 2 are, the same or different, alkenyl, etc, and X 1 and X 2 are hydrogen atoms, or are combined together to form a single bond or alkylene, and X 3 is absent or is alkyl, etc, Y is absent or anion, a and b are, the same or different, 0 to 3, and L 3 is a single bond, etc, R 3 is alkyl, etc, L 1 and L 2 are -O-, -CO-O- or -O-CO-), a composition comprising the cationic lipid and a nucleic acid, and a method for introducing a nucleic acid into a cell by using the composition comprising the cationic lipid and the nucleic acid, and the like.
摘要:
A composition, or the like, for inhibiting the expression of target gene. There is provided a composition, or the like, comprising an RNA-enclosing liposome composed of a composite particle, the composite particle composed of a lead particle and RNA containing a sequence of continuous 15 to 30 bases of mRNA of target gene or a sequence complementary to the sequence, and a lipid membrane covering the composite particle, which liposome is filled with a liquid containing a polar organic solvent in which constituents of the lipid membrane are soluble wherein the polar organic solvent is contained in such a concentration that the lipid membrane constituents are dispersible and that also the composite particle is dispersible.
摘要:
The present invention relates to a method for producing a composition containing a complex between a membrane composed of a lipid monolayer (reversed micelle) and a nucleic acid, and a lipid membrane for encapsulating the complex therein, comprising the following steps A to D: Step A: preparing a complex between the nucleic acid and a liposome comprising a cationic lipid represented by the formula (I) and/or a cationic lipid other than cationic lipid represented by the formula (I); Step B: preparing a dispersion liquid by dispersing the complex in water or ethanol aqueous solution; Step C: preparing a solution by dissolving the formula (I) and/or the cationic lipid other than cationic lipid represented by the formula (I) in ethanol or an ethanol aqueous solution; and Step D: mixing the dispersion liquid and the solution, and optionally adding water; wherein the formula (I) is
(wherein: R 1 and R 2 are, the same or different, each linear or branched alkyl, alkenyl or alkynyl having 12 to 24 carbon atoms, X 1 and X 2 are hydrogen atoms, or are combined together to form a single bond or alkylene, X 3 is absent or is alkyl having 1 to 6 carbon atoms, or alkenyl having 3 to 6 carbon atoms, when X 3 is absent, Y is absent, a and b are 0, L 3 is a single bond, R 3 is alkyl having 1 to 6 carbon atoms, alkenyl having 3 to 6 carbon atoms, or alkyl having 1 to 6 carbon atoms or alkenyl having 3 to 6 carbon atoms substituted with 1 to 3 substituent(s), which is(are), the same or different, amino, monoalkylamino, dialkylamino, trialkylammonio, hydroxy, alkoxy, carbamoyl, monoalkylcarbamoyl, or dialkylcarbamoyl, and L 1 and L 2 are -O-, Y is absent, a and b are, the same or different, 0 to 3, and are not 0 at the same time, L 3 is a single bond, R 3 is alkyl having 1 to 6 carbon atoms, alkenyl having 3 to 6 carbon atoms, or alkyl having 1 to 6 carbon atoms or alkenyl having 3 to 6 carbon atoms substituted with 1 to 3 substituent(s), which is(are), the same or different, amino, monoalkylamino, dialkylamino, trialkylammonio, hydroxy, alkoxy, carbamoyl, monoalkylcarbamoyl, or dialkylcarbamoyl, L 1 and L 2 are, the same or different, -O-, -CO-O- or -O-CO-, Y is absent, a and b are, the same or different, 0 to 3, L 3 is a single bond, R 3 is a hydrogen atom, and L 1 and L 2 are, the same or different, -O-, -CO-O- or -O-CO-, or Y is absent, a and b are, the same or different, 0 to 3, L 3 is -CO- or -CO-O-, R 3 is alkyl having 1 to 6 carbon atoms or alkenyl having 3 to 6 carbon atoms substituted with 1 to 3 substituent(s), which is(are), the same or different, amino, monoalkylamino, dialkylamino, trialkylammonio, hydroxy, alkoxy, carbamoyl, monoalkylcarbamoyl, or dialkylcarbamoyl, wherein at least one of the substituents is amino, monoalkylamino, dialkylamino, or trialkylammonio, and L 1 and L 2 are , the same or different, -O-, -CO-O- or -O-CO-, and when X 3 is alkyl having 1 to 6 carbon atoms or alkenyl having 3 to 6 carbon atoms, Y is a pharmaceutically acceptable anion, a and b are, the same or different, 0 to 3, L 3 is a single bond, R 3 is alkyl having 1 to 6 carbon atoms, alkenyl having 3 to 6 carbon atoms, L 1 and L 2 are, the same or different, -O-, -CO-O- or -O-CO-).
摘要:
An object of the present invention is to provide a composition for suppressing expression of a target gene, and the like. A composition comprising an RNA-encapsulated liposome, wherein the RNA contains a sequence consisting of 15 to 30 contiguous bases of a target gene mRNA (hereinafter, sequence X) and a base sequence (hereinafter, complementary sequence X') complementary to the sequence X, 1 to 90% of all sugars binding to the bases of the sequence X and the complementary sequence X' being ribose substituted by a modifying group at 2' position, and the liposome being capable of reaching a tissue or an organ containing an expression site of the target gene is provide.
摘要:
The present invention provides nucleic acid-containing lipid nanoparticles containing a lipid (lipid A) which has a hydrophilic unit having a single quaternary ammonium group, and three independent, optionally substituted hydrocarbon groups, a lipid derivative or fatty acid derivative of a water-soluble polymer, and a nucleic acid.