Synthesis and Properties of Nucleobase-Sugar Dual Modified Nucleic Acids: 2<b>′</b>-OMe-RNA and scpBNA Bearing a 5-Hydroxycytosine Nucleobase
作者:Yota Sakurai、Takao Yamaguchi、Tokuyuki Yoshida、Masahiko Horiba、Takao Inoue、Satoshi Obika
DOI:10.1021/acs.joc.2c02038
日期:2023.1.6
sugar-modified nucleic acids, such as 2′-O-methylribonucleic acid (2′-OMe-RNA) and 2′-O,4′-C-spirocyclopropylene-bridged nucleic acid (scpBNA), have emerged as useful antisense materials. Herein, we aimed to combine these two advantages by designing dual modified nucleic acids 2′-OMe-RNA-5-OHCyt and scpBNA-5-OHCyt bearing the 5-OHCyt nucleobase to develop efficient and safe ASOs. We describe the synthesis of 2′-OMe-RNA-5-OHCyt
天然存在的 5-羟基胞嘧啶 ( 5-OH Cyt) 与 DNA 损伤有关,最近被发现在用作胞嘧啶 (Cyt) 替代物时可降低反义寡核苷酸 (ASO) 的肝毒性,而不会影响其反义活性。此外,糖修饰的核酸,例如2'- O-甲基核糖核酸 (2'-OMe-RNA) 和 2'- O , 4'- C-螺环丙烯桥接核酸 (scpBNA),已成为有用的反义核酸材料。在此,我们旨在通过设计双修饰核酸 2'-OMe-RNA- 5-OH Cyt 和带有5-OH的scpBNA -5-OH Cyt来结合这两个优点用于开发高效安全的 ASO 的 Cyt 核碱基。我们描述了 2'-OMe-RNA- 5-OH Cyt 和 scpBNA -5-OH Cyt 亚磷酰胺的合成及其与寡核苷酸 (ON) 的结合。2'-OMe-RNA- 5-OH Cyt- 和 scpBNA- 5-OH Cyt 修饰的 ONs的双链形成能力和碱基识别特性与