Abstract

3-Cyanovinylcarbazole nucleoside, which effectively photocrosslinks to the pyrimidine base in complementary RNA strands, was incorporated into antisense oligonucleotides, and we evaluated the photoreactivity and the sequence selectivity to mutated K-ras oligoRNAs, as well as the regulation of the function of K-ras mRNA. We demonstrated that the reverse transcription and the translation activity of K-ras mRNA were quickly suppressed by a few seconds of photoirradiation with the addition of the photoresponsive antisense ODN.

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