Photoinduced RNA interference

Accounts of Chemical Research
Yuka Matsushita-Ishiodori, Takashi Ohtsuki

Abstract

Because RNA interference (RNAi) can be applied to any gene, this technique has been widely used for studying gene functions. In addition, many researchers are attempting to use RNAi technology in RNAi-based therapies. However, several challenging and controversial issues have arisen during the widespread application of RNAi including target gene specificity, target cell specificity, and spatiotemporal control of gene silencing. To address these issues, several groups have utilized photochemistry to control the RNA release, both spatially and temporally. In this Account, we focus on recent studies using photocleavable protecting groups, photosensitizers, Hand gold nanoparticles for photoinduced RNAi. In 2005 the first report of photoinduced RNAi used a caged short interfering RNA (siRNA), an siRNA carrying a photocleavable protecting group. Caging groups block the bioactivities of target molecules, but allow for complete recovery of these functions via photoactivation. However, some RNAi activity can occur in these caged siRNAs, so it will be necessary to decrease this "leakage" and raise the RNAi activity restored after irradiation. This technique also uses UV light around 350 nm, which is cytotoxic, but in the near future we e...Continue Reading

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Sep 4, 2013·Bioconjugate Chemistry·Yuka Matsushita-IshiodoriTakashi Ohtsuki
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