A combination of the modified catalytic core and conjugation of 3′-inverted deoxythymidine for a more efficient and nuclease-resistant 10-23 DNAzyme

Abstract

10-23 DNAzyme is a catalytic DNA molecule capable of cleaving complementary RNA. Its high cleavage efficiency is being pursued by chemical modifications, for realizing its genetic therapeutics potential. The most efficient and nuclease-resistant DNAzyme was obtained in this study combined two modifications − 7-aminopropyl-8-aza-7-deaza-2′-deoxyadenosine (residue 1) at A9 and 3′-inverted deoxythymidine residue (iT) at 3′-end. Moreover, this combinatorial modification could be a universal approach for designing efficient and enzyme-resistant 10-23 DNAzyme against other RNA targets, and the catalytic core-modification could be further combined with other recognition arm modifications for practical applications as genetic therapeutics and biosensor tools.