Targeting the production of oncogenic microRNAs with multimodal synthetic small molecules

ACS Chemical Biology
Duc Duy VoMaria Duca

Abstract

MicroRNAs (miRNAs) are a recently discovered category of small RNA molecules that regulate gene expression at the post-transcriptional level. Accumulating evidence indicates that miRNAs are aberrantly expressed in a variety of human cancers and revealed to be oncogenic and to play a pivotal role in initiation and progression of these pathologies. It is now clear that the inhibition of oncogenic miRNAs, defined as blocking their biosynthesis or their function, could find an application in the therapy of different types of cancer in which these miRNAs are implicated. Here we report the design, synthesis, and biological evaluation of new small-molecule RNA ligands targeting the production of oncogenic microRNAs. In this work we focused our attention on miR-372 and miR-373 that are implicated in the tumorigenesis of different types of cancer such as gastric cancer. These two oncogenic miRNAs are overexpressed in gastric cancer cells starting from their precursors pre-miR-372 and pre-miR-373, two stem-loop structured RNAs that lead to mature miRNAs after cleavage by the enzyme Dicer. The small molecules described herein consist of the conjugation of two RNA binding motives, i.e., the aminoglycoside neomycin and different natural and...Continue Reading

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