Abstract
Photoswitchable ortho-functionalized tetrafluorinated azobenzene-modified siRNAs (F-azo-siRNAs) were synthesized using solid-phase phosphoramidite chemistry. The activity of an F-azo-siRNA targeting enhanced green fluorescence protein (eGFP) in transgenic (Tg) Japanese Medaka (Oryzias latipes) was reversibly photocontrolled with blue (470 nm) and green (530 nm) light, to activate and inactivate the siRNA, respectively. This study highlights the first reversible in vivo study with photoswitchable siRNA. Controlling siRNA function reversibly in vivo could open new opportunities for biotech research to better understand gene function and cellular mechanisms.
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