Synthesis and biological properties of chemically modified siRNAs bearing 1-deoxy-d-ribofuranose in their 3′-overhang region
作者:Kazumi Taniho、Remi Nakashima、Mahmoud Kandeel、Yoshiaki Kitamura、Yukio Kitade
DOI:10.1016/j.bmcl.2012.01.132
日期:2012.4
To elucidate the role of the sugar moiety in the two natural nucleotides of the 3′-overhang region of small interfering RNA (siRNA), we synthesized siRNAs that incorporated two abasic nucleosides, 1-deoxy-d-ribofuranose (RH). We improved the method for preparing an O-protected abasic nucleoside, 1-deoxy-2,3,5-tri-O-benzoyl-β-d-ribofuranose, via the reductive cleavage of the anomeric position of 1-O-acetyl-2
为了阐明糖部分在小干扰RNA(siRNA)3'-突出端区域的两个天然核苷酸中的作用,我们合成了包含两个无碱基核苷1- deoxy - d - rifurfuranose(R H)的siRNA 。我们通过还原裂解1- O-乙酰基-的异头位置,改进了制备O-保护的脱氢核苷1-脱氧-2,3,5-三-O-苯甲酰基-β - d-核呋喃糖的方法。2,3,5-三-O-苯甲酰基-β - d-呋喃呋喃糖。通过标准亚磷酰胺固相方法将R H掺入寡核苷酸中,R H将其转化为亚磷酰胺衍生物,并将固相支持物连接到可控孔玻璃树脂上。容易以高收率制备在3'突出端区域具有R H的化学修饰的RNA 。含有R H的siRNA表现出中等的核酸酶抗性和理想的敲低效应。