Abstract
TRUE gene silencing is a technology to eliminate specific cellular RNAs by using tRNase ZL and small guide RNA (sgRNA). Here we investigated how WT1-mRNA-targeting sgRNAs affect leukemic cells. We showed that sgRNA can be easily taken up by cells without any transfection reagents, and that the naked sgRNAs targeting the WT1 mRNA can reduce its mRNA levels and WT1 protein amounts in the WT1-expressing leukemic cells. Concomitantly, these sgRNAs efficiently induced apoptosis in these cells but not in WT1-nonexpressing cells. We also demonstrated that the reduction in the WT1 mRNA level is caused by its cleavage by tRNase ZL.
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