Synthesis and properties of novel l-isonucleoside modified oligonucleotides and siRNAs
作者:Jun Zhang、Yue Chen、Ye Huang、Hong-Wei Jin、Ren-Ping Qiao、Lei Xing、Liang-Ren Zhang、Zhen-Jun Yang、Li-He Zhang
DOI:10.1039/c2ob26219c
日期:——
incorporated into a DNA single strand and siRNA. It was found that isonucleoside 5 modified oligonucleotides can form stable double helical structures with their complementary DNA and RNA and the stability towards nuclease and ability to activate RNase H are more promising compared with the unmodified, natural analogues. In siRNA, passenger strand modified with isonucleoside (5a/b) at 3′ or 5′ terminal
反义寡核苷酸和siRNA是潜在的治疗剂,它们的化学修饰在改善寡核苷酸的性质和活性方面起着重要的作用。异核苷是一种核苷类似物,其中核苷碱基从C-1移至其的其他位置。核糖。在该报告中,合成了在糖部分包含5'-CH 2延伸链的新型异核苷5,因此将异腺苷5a和异胸苷5b掺入了DNA单链和siRNA中。发现异核苷5修饰的寡核苷酸可以与其互补的DNA和RNA形成稳定的双螺旋结构,并且与未修饰的天然类似物相比,对核酸酶的稳定性和激活RNase H的能力更有希望。在siRNA中,在3'或5'末端用异核苷(5a / b)修饰的过客链可以保留沉默活性,并使过客链特异脱靶效应最小化。