SIRNA-HYDROPHILIC POLYMER CONJUGATES AND PROCESS OF PREPARATION THEREOF

Abstract

Disclosed are hybrid conjugates formed by covalently bonding siRNA (small interfering RNA) molecules to hydrophilic polymers for improving stability of the siRNA molecules effective for gene therapy in vivo, and polyelectrolyte complex micelles formed by ionic interactions between the conjugates and multifunctional cationic compounds. The siRNA-hydrophilic polymer conjugates and polyelectrolyte complex micelles derived therefrom can be advantageously used for improving stability of the siRNA molecules in vivo. Consequently, the delivery of siRNA molecules for therapeutic applications into cells can be facilitated, and the siRNA is still active even though a small dose of the siRNA is used.