SiRNA delivery: challenges and role of carrier systems.

Gene silencing by RNA interference is a rapidly growing therapeutic area for managing diseases. Despite research advances in this direction, the poor cellular uptake of synthetic small interfering RNAs is a major impediment to their clinical applications. Polymer and lipid-based systems are attractive carrier systems for delivery of siRNA and provide options for desirable engineering of carrier particles. In this review, there is a detailed discussion of RNAi delivery systems and recent advances in the field.