RNA interference induced by siRNAs modified with 4′- thioribonucleosides in cultured mammalian cells

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Abstract

Short interfering RNAs (siRNAs) variously modified with 4′-thioribonucleosides against the Photinus luciferase gene were tested for their induction of the RNA interference (RNAi) activity in cultured NIH/3T3 cells. Results indicated that modifications at the sense-strand were well tolerated for RNAi activity except for full modification with 4′-thioribonucleosides. However, the activity of siRNAs modified at the antisense-strand was dependent on the position and the number of modifications with 4′-thioribonucleosides. Since modifications of siRNAs with 4′-thioribonucleosides were well tolerated in RNAi activity compared with that of 2′-O-methyl nucleosides, 4′-thioribonucleosides might be potentially useful in the development of novel and effective chemically modified siRNAs. © 2005 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.

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Hoshika, S., Minakawa, N., Kamiya, H., Harashima, H., & Matsuda, A. (2005). RNA interference induced by siRNAs modified with 4′- thioribonucleosides in cultured mammalian cells. FEBS Letters, 579(14), 3115–3118. https://doi.org/10.1016/j.febslet.2005.04.073

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