Provided is a modified double-stranded oligonucleotide, in which the sense strand comprises a nucleotide sequence 1, the anti-sense strand comprises a nucleotide sequence 2, the nucleotide sequences 1 and 2 are both 19 nucleotides in length, and in the direction from 5′ end to 3′ end, nucleotides at positions 7, 8 and 9 of the nucleotide sequence 1 and nucleotides at positions 2, 6, 14 and 16 of the nucleotide sequence 2 are all fluoro-modified nucleotides, and each nucleotide at other positions is independently one of non-fluoro-modified nucleotides. Further provided are a pharmaceutical composition and a conjugate comprising the oligonucleotide, and pharmaceutical use thereof.
提供了一种修饰的双链寡核苷酸,其中有义链包括核苷酸序列1,反义链包括核苷酸序列2,核苷酸序列1和2的长度均为19个核苷酸,方向从5′端到3′端、核苷酸序列1的第7、8和9位的核苷酸和核苷酸序列2的第2、6、14和16位的核苷酸都是
氟修饰的核苷酸,其他位置的每个核苷酸独立地是非
氟修饰的核苷酸之一。进一步提供了包含寡核苷酸的药物组合物和共轭物及其药物用途。