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J Gene Med. 2012 Feb;14(2):138-46. doi: 10.1002/jgm.1653.

Enhanced intracellular delivery and multi-target gene silencing triggered by tripodal RNA structures.

Author information

1
Global Research Laboratory for RNAi Medicine, Department of Chemistry, Sungkyunkwan University, Suwon, Korea.

Abstract

BACKGROUND:

The development of gene interfering RNA (iRNA) molecules such as small interfering RNAs (siRNAs) and antagomirs provides promising therapeutic modalities for targeting specific mRNAs and microRNAs (miRNAs) involved in disease mechanisms. Therapeutic iRNA strategy against cancer or hypermutable viruses prefers targeting multiple genes simultaneously to achieve synergistic inhibition and to prevent resistance.

METHODS:

In the present study, we report chemically synthesized, multi-target gene interfering RNA structures based upon branched, tripodal interfering RNAs (termed T-tiRNAs).

RESULTS:

The T-tiRNAs could simultaneously inhibit up to three different mRNAs or miRNAs by harboring three siRNA or antagomir units. Moreover, when complexed with cationic delivery vehicles, T-tiRNAs showed enhanced gene interfering activity over conventional siRNAs or antagomirs as a result of increased intracellular delivery.

CONCLUSIONS:

The data obtained in the present study provide an example of synthetic multi-functional RNA structures that enable multiple gene interference in mammalian cells, which could become powerful tools for an efficient combinatorial iRNA strategy.

PMID:
22228611
DOI:
10.1002/jgm.1653
[Indexed for MEDLINE]

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