CARRIER COMPOSITION FOR NUCLEIC ACID TRANSPORT

摘要

Disclosed is a carrier composition for nucleic acid transport, which can protect a nucleic acid (e.g., siRNA) from decomposition and transport the nucleic acid into a cell with good efficiency when the carrier composition is administered to an animal cell or a living organism and has low toxicity. Also disclosed is a nucleic acid transport composition which comprises the carrier composition and a nucleic acid. The carrier composition can be prepared by mixing (A) a cationic lipid having a steroid nucleus with (B) a cationic lipid of a quaternary ammonium salt type. The nucleic acid transport composition can be prepared by mixing the carrier composition with a nucleic acid.