The present invention relates to a small interfering RNA (siRNA) being 2'-O-methyl modified and there being attached thereto by a phosphodiester bond a position 3', wherein group R in position 3', wherein R is selected from among: a C1-C6 alkyl substituted with at least one -OH group; a C4-C6 cycloalkyl substituted with at least one -OH group; a C4-C6 heterocycloalkyl; a heteroalkyl chain having between 2 and 7 atoms, wherein at least one is an oxygen atom or a sulphur atom, the chain preferably being substituted with at least one -OH group; and a heteroaryl the ring whereof being formed of between 3 and 6 atoms and at least one of said atoms is an oxygen atom. The present invention furthermore refers to the use of said siRNA for the treatment of inflammatory diseases, preferably inflammatory bowel disease.
本发明涉及一种经 2'-O-甲基修饰的小干扰 RNA(siRNA),其 3'位通过
磷酸二酯键相连,其中 3'位的基团 R 选自以下基团被至少一个-OH 基团取代的 C1-C6 烷基;被至少一个-OH 基团取代的 C4-C6 环烷基;C4-C6 杂环烷基;具有 2 至 7 个原子的杂烷基链,其中至少一个是氧原子或
硫原子,该链最好被至少一个-OH 基团取代;以及杂芳基,其环由 3 至 6 个原子组成,其中至少一个原子是氧原子。本发明还涉及将所述 siRNA 用于治疗炎症性疾病,最好是炎症性肠病。