A nucleotide derivative is disclosed, which in its 4' and/or 5' position on the sugar moiety is substituted with a group comprising a non-aromatic cyclid group comprising at least one nitrogen atom, said cyclid group optionally being substituted. The nucleotide monomer induces increased thermal stability of RNA:DNA, RNA:RNA or DNA:DNA duplexes, if said RNA and/or DNA strand comprises at least one said monomer. The nucleotides and oligonucleotides comprising at least one of said nucleotides can be used in therapy (such as antisense or antigene therapy) and in methods for synthesising polynucleotides (e.g. as a primer). The nucleotide derivative may also be used in a medicament. Further, the use of the nucleotide derivative for the preparation of a medicament for the treatment of diseases or disorders is also disclosed.
                            本发明公开了一种核苷酸衍
生物,其中在糖基上的4'和/或5'位置被取代为包含至少一个氮原子的非芳香环状基团,该环状基团可以被取代。如果RNA和/或DNA链中至少包含一个该单体,则该核苷酸单体能够诱导RNA:DNA,RNA:RNA或DNA:DNA双链的热稳定性增加。包括至少一个该核苷酸的核苷酸和寡核苷酸可以用于治疗(如反义或抗
基因治疗)以及用于合成多核苷酸的方法(例如作为引物)。该核苷酸衍
生物也可以用于药物。此外,本发明还公开了将该核苷酸衍
生物用于制备治疗疾病或障碍的药物的用途。