An antisense oligonucleotide derivative against HCV is provided which contains one or more nucleotide analogue units having a modified sugar portion and represented by the following general formula
where B denotes a pyrimidine or purine nucleic acid base or an analogue thereof.
The derivative of the present invention is an antisense against hepatitis C virus (HCV) gene, binds to HCV-RNA with high affinity within cells, can control and inhibit the expression of its gene with high efficiency, and shows high resistance to nucleases.
The BNA antisense oligonucleotide of the present invention is also effective in an antisense method targeting HCV, no matter what secondary structures, such as loops or stems, in a target RNA nucleic acid are.
本发明提供了一种抗 HCV 的反义寡核苷酸衍
生物,它含有一个或多个核苷酸类似物单元,其糖部分经过修饰,并由下式通式表示
其中 B 表示
嘧啶或
嘌呤核酸碱基或其类似物。
本发明的衍
生物是一种抗丙型肝炎病毒(HCV)
基因的反义寡核苷酸,能在细胞内与 HCV-RNA 高亲和力地结合,能高效地控制和抑制其
基因的表达,并对
核酸酶有很强的抗性。
本发明的 BNA 反义寡核苷酸在针对 HCV 的反义方法中也是有效的,无论靶 RNA 核酸中的二级结构(如环或茎)是什么。