Abstract
Chemically modified mRNAs are extensively studied with a view toward their clinical application. In particular, long noncoding RNAs (lncRNAs) containing SINE elements, which enhance the translation of their target mRNAs (i.e., SINEUPs), have potential as RNA therapies for various diseases, such as haploinsufficiencies. To establish a SINEUP-based system for efficient protein expression, we directly transfected chemically modified invitro transcribed (mIVT) SINEUP RNAs to examine their effects on target mRNA translation. mIVT SINEUP RNAs enhanced translation of EGFP mRNA and endogenous target Sox9 mRNA in both cultured cells and a cell-free translation system. Our findings reveal the functional role of RNA modifications in SINEUPs and suggest several broad clinical applications of such an RNA regulatory system.
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