[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.1007/s10059-009-0134-8

A Highly Effective and Long-Lasting Inhibition of miRNAs with PNA-Based Antisense Oligonucleotides

Oh, Su Young (Panagene Inc.)
Ju, YeongSoon (Panagene Inc.)
Park, Heekyung (Panagene Inc.)

Publication Information

Abstract

MiRNAs are non-coding RNAs that play a role in the regulation of major processes. The inhibition of miRNAs using antisense oligonucleotides (ASOs) is a unique and effective technique for the characterization and subsequent therapeutic targeting of miRNA function. Recent advances in ASO chemistry have been used to increase both the resistance to nucleases and the target affinity and specificity of these ASOs. Peptide nucleic acids (PNAs) are artificial oligonucleotides constructed on a peptide-like backbone. PNAs have a stronger affinity and greater specificity to DNA or RNA than natural nucleic acids and are resistant to nucleases, which is an essential characteristic for a miRNA inhibitor that will be exposed to serum and cellular nucleases. For increasing cell penetration, PNAs were conjugated with cell penetrating peptides (CPPs) at N-terminal. Among the tested CPPs, Tat-modified peptide-conjugated PNAs have most effective function for miRNA inhibition. PNA-based ASO was more effective miRNA inhibitor than other DNA-based ASOs and did not show cytotoxicity at concentration up to 1,000 nM. The effects of PNA-based ASOs were shown to persist for 9 days. Also, PNA-based ASOs showed considerable stability at storage temperature. These results suggest that PNA-based ASOs are more effective ASOs of miRNA than DNA-based ASOs and PNA-based ASO technology, compared with other technologies used to inhibit miRNA activity can be an effective tool for investigating miRNA functions.

Keywords

antisense oligonucleotides (ASOs); cell penetrating peptides (CPPs); microRNA (miRNA); peptide nucleic acids (PNAs); PNA-based ASO;

Citations & Related Records

Times Cited By Web Of Science : 15 (Related Records In Web of Science)

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