UMMS Affiliation

RNA Therapeutics Institute; Program in Molecular Medicine; Department of Biochemistry and Molecular Pharmacology

Publication Date

10-15-2015

Document Type

Article

Disciplines

Biochemistry | Molecular Biology

Abstract

One of the major obstacles to the pharmaceutical success of oligonucleotide therapeutics (ONTs) is efficient delivery from the point of injection to the intracellular setting where functional gene silencing occurs. In particular, a significant fraction of internalized ONTs are nonproductively sequestered in endo-lysosomal compartments. Here, we describe a two-step, robust assay for high-throughput de novo detection of small bioactive molecules that enhance cellular uptake, endosomal escape, and efficacy of ONTs. Using this assay, we screened the LOPAC (Sigma-Aldrich) Library of Pharmacologically Active Compounds and discovered that Guanabenz acetate (Wytensin), an FDA-approved drug formerly used as an antihypertensive agent, is capable of markedly increasing the cellular internalization and target mRNA silencing of hydrophobically modified siRNAs (hsiRNAs), yielding a approximately 100-fold decrease in hsiRNA IC50 (from 132 nM to 2.4 nM). This is one of the first descriptions of a high-throughput small-molecule screen to identify novel chemistries that specifically enhance siRNA intracellular efficacy, and can be applied toward expansion of the chemical diversity of ONTs.

Rights and Permissions

Citation: Nucleic Acids Res. 2015 Oct 15;43(18):8664-72. doi: 10.1093/nar/gkv942. Epub 2015 Sep 22. Link to article on publisher's site

DOI of Published Version

10.1093/nar/gkv942

Comments

Copyright The Author(s) 2015. Published by Oxford University Press on behalf of Nucleic Acids Research. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

Related Resources

Link to Article in PubMed

Journal/Book/Conference Title

Nucleic acids research

PubMed ID

26400165

Creative Commons License

Creative Commons Attribution-Noncommercial 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License

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