alexa Cyclodextrin-based siRNA delivery nanocarriers: a state-of-the-art review.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Developing Drugs

Author(s): Chaturvedi K, Ganguly K, Kulkarni AR, Kulkarni VH, Nadagouda MN,

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Abstract INTRODUCTION: The discovery of synthetic small interfering RNA (siRNA) has led to a surge of interest in harnessing RNA interference (RNAi) technology for biomedical applications and drug development. Even though siRNA can be a powerful therapeutic drug, its delivery remains a major challenge, due to the difficulty in its cellular uptake. Naked siRNA has a biological half-life of less than an hour in human plasma. To increase the lifetime and improve its therapeutic efficacy, non-viral vectors have been developed. As a natural evolution, cyclodextrins (CDs), which are natural cyclic oligosaccharides, have recently been applied as delivery vehicles for siRNA, and this in turn, has led to a surge of interest in this area. AREAS COVERED: This review discusses the recent advances made in the design of delivery strategies for siRNA, focusing on CD-based delivery vectors, because these have demonstrated clinical success. The methods of preparation of CD-based vectors, their characterization, transfection efficiencies, cellular toxicity, preclinical and clinical trials are also addressed, as well as future therapeutic applications. EXPERT OPINION: siRNA-mediated RNAi therapeutics is beginning to transform healthcare, particularly, for the treatment of solid tumors. For example, CALAA01, a targeted, self-assembling nanoparticle system based on CD complexed with siRNA has been effective in phase I clinical trials. Although siRNA therapeutics suffers from problems related to off-target effects and non-specific gene silencing, these problems can be overcome by reducing the nanoparticle size, improving the targeting efficiency and by modifying the primary sequence of the siRNA. This article was published in Expert Opin Drug Deliv and referenced in Journal of Developing Drugs

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