TITLE

The Roles of Individual Mammalian Argonautes in RNA Interference In Vivo

AUTHOR(S)
Ruda, Vera M.; Chandwani, Rohit; Sehgal, Alfica; Bogorad, Roman L.; Akinc, Akin; Charisse, Klaus; Tarakhovsky, Alexander; Novobrantseva, Tatiana I.; Koteliansky, Victor
PUB. DATE
July 2014
SOURCE
PLoS ONE;Jul2014, Vol. 9 Issue 7, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Argonaute 2 (Ago2) is the only mammalian Ago protein capable of mRNA cleavage. It has been reported that the activity of the short interfering RNA targeting coding sequence (CDS), but not 3′ untranslated region (3′UTR) of an mRNA, is solely dependent on Ago2 in vitro. These studies utilized extremely high doses of siRNAs and overexpressed Ago proteins, as well as were directed at various highly expressed reporter transgenes. Here we report the effect of Ago2 in vivo on targeted knockdown of several endogenous genes by siRNAs, targeting both CDS and 3′UTR. We show that siRNAs targeting CDS lose their activity in the absence of Ago2, whereas both Ago1 and Ago3 proteins contribute to residual 3′UTR-targeted siRNA-mediated knockdown observed in the absence of Ago2 in mouse liver. Our results provide mechanistic insight into two components mediating RNAi under physiological conditions: mRNA cleavage dependent and independent. In addition our results contribute a novel consideration for designing most efficacious siRNA molecules with the preference given to 3′UTR targeting as to harness the activity of several Ago proteins.
ACCESSION #
97360866

 

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics