Subcellular fate and off-target effects of siRNA, shRNA, and miRNA.

Abstract:

:RNA interference (RNAi) strategies include double-stranded RNA (dsRNA), small interfering RNA (siRNA), short hairpin RNA (shRNA), and microRNA (miRNA). As this is a highly specific technique, efforts have been made to utilize RNAi towards potential knock down of disease-causing genes in a targeted fashion. RNAi has the potential to selectively inhibit gene expression by degrading or blocking the translation of the target mRNA. However, delivering these RNAs to specific cells presents a significant challenge. Some of these challenges result from the necessity of traversing the circulatory system while avoiding kidney filtration, degradation by endonucleases, aggregation with serum proteins, and uptake by phagocytes. Further, non-specific delivery may result in side-effects, including the activation of immune response. We discuss the challenges in the systemic delivery to target cells, cellular uptake, endosomal release and intracellular transport of RNAi drugs and recent progress in overcoming these barriers. We also discuss approaches that increase the specificity and metabolic stability and reduce the off-target effects of RNAi strategy.

journal_name

Pharm Res

journal_title

Pharmaceutical research

authors

Singh S,Narang AS,Mahato RI

doi

10.1007/s11095-011-0608-1

subject

Has Abstract

pub_date

2011-12-01 00:00:00

pages

2996-3015

issue

12

eissn

0724-8741

issn

1573-904X

journal_volume

28

pub_type

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