Importance

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Abstract

Double-stranded modified siRNA targeting a RecQL1 helicase gene includes a sense strand including the nucleotide sequence shown in SEQ ID NO: 1, and an antisense strand including the nucleotide sequence shown in SEQ ID NO: 2, wherein the sense strand includes 2′-substituted nucleotides at positions 2, 3, 4 and 13 in the nucleotide sequence shown in SEQ ID NO: 1, the sense strand further includes a 2′-substituted nucleotide(s) at one or more positions selected from the group consisting of positions 12, 14, 17, 18 and 19 in the nucleotide sequence shown in SEQ ID NO: 1, wherein the position 2′ of the 2′-substituted nucleotides is —R¹, —OR¹, —R²OR¹, —OR²OR¹ or —R³OR²OR¹, wherein R¹ represents a C_1-4 alkyl group, and R² and R³ independently represent a C_1-3 alkylene group.

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First Claim