Provided is a siRNA for inhibiting HBV gene expression, comprising a sense strand and an antisense strand. The sense strand comprises a nucleotide sequence 1, and the antisense strand comprises a nucleotide sequence 2; the nucleotide sequence 1 and the nucleotide sequence 2 are at least partially reversely complementary to form a double-stranded region; the nucleotide sequence 1 and the nucleotide sequence shown in SEQ ID NO: 1 are equal in length, and no more than 3 nucleotide differences are generated; the nucleotide sequence 2 and the nucleotide sequence shown in SEQ ID NO: 2 are equal in length, and no more than 3 nucleotide differences are generated; nucleotides of the 7th, 8th, and 9th bits of the nucleotide sequence 1 and the 2nd, 6th, 14th, and 16th of the nucleotide sequence 2 are fluoro-modified nucleotides. Also provided are a pharmaceutical composition and a conjugate containing the siRNA. The siRNA, the pharmaceutical composition, and the conjugate in the present disclosure have good activity for inhibiting HBV gene expression.
本发明提供了一种用于抑制 HBV
基因表达的 siRNA,它包括有义链和反义链。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 和核苷酸序列 2 至少部分反向互补以形成双链区;核苷酸序列 1 和
SEQ ID NO:1的核苷酸序列1和
SEQ ID NO:2所示的核苷酸序列1长度相等,且产生的核苷酸差异不超过3个;核苷酸序列2和
SEQ ID NO:2所示的核苷酸序列2长度相等,且产生的核苷酸差异不超过3个;核苷酸序列1的第7位、第8位和第9位核苷酸和核苷酸序列2的第2位、第6位、第14位和第16位核苷酸是
氟修饰核苷酸。此外,还提供了一种药物组合物和一种含有 siRNA 的共轭物。本公开的 siRNA、药物组合物和共轭物在抑制 HBV
基因表达方面具有良好的活性。