Doxifluridine-conjugated 2-5A analog shows strong RNase L activation ability and tumor suppressive effect.
2016
Abstract RNase L is activated by 2′,5′-oligoadenylates (2-5A) at subnanomolar levels to cleave single-stranded RNA. We previously reported the hypothesis that the introduction of an 8-methyladenosine residue at the 2′-terminus of the 2-5A tetramer shifts the 2-5A binding site of RNase L. In this study, we synthesized various 5′-modified 2-5A analogs with 8-methyladenosine at the 2′-terminus. The doxifluridine-conjugated 8-methyladenosine-substituted 2-5A analog was significantly more effective as an activator of RNase L than the parent 5′-monophophorylated 2-5A tetramer and showed a tumor suppressive effect against human cervical cancer cells.
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