COMPOSITION FOR NUCLEIC ACID DELIVERY, CARRIER COMPOSITION, PHARMACEUTICAL COMPOSITION USING THE COMPOSITION FOR NUCLEIC ACID DELIVERY OR THE CARRIER COMPOSITION, AND METHOD FOR DELIVERING NUCLEIC ACID
An excellent nucleic acid delivery composition is provided which has reduced cytotoxicity and improved nucleic acid introduction efficiency and gene expression efficiency. The composition comprises: a block copolymer having an uncharged hydrophilic polymer segment and a cationic polymer segment a cationic polymer and a nucleic acid, wherein the mol percentage (B/H ratio) of the cationic groups of the block copolymer to the total cationic groups of the block copolymer and the cationic polymer is between 25% and 90%.
