Agrawal S, Jiang Z, Zhao Q, Shaw D, Cai Q, Roskey A, Channavajjala L, Saxinger C, Zhang R
Hybridon Inc., Cambridge, MA 02139, USA.
Proc Natl Acad Sci U S A. 1997 Mar 18;94(6):2620-5. doi: 10.1073/pnas.94.6.2620.
Antisense oligonucleotides are being evaluated in clinical trials as novel therapeutic agents. To further improve the properties of antisense oligonucleotides, we have designed mixed-backbone oligonucleotides (MBOs) that contain phosphorothioate segments at the 3' and 5' ends and have a modified oligodeoxynucleotide or oligoribonucleotide segment located in the central portion of the oligonucleotide. Some of these MBOs indicate improved properties compared with phosphorothioate oligodeoxynucleotides with respect to affinity to RNA, RNase H activation, and anti-HIV activity. In addition, more acceptable pharmacological, in vivo degradation and pharmacokinetic profiles were obtained with these MBOs.
反义寡核苷酸正在作为新型治疗药物进行临床试验评估。为了进一步改善反义寡核苷酸的特性,我们设计了混合骨架寡核苷酸(MBO),其在3'和5'末端含有硫代磷酸酯片段,并在寡核苷酸的中央部分含有修饰的寡脱氧核苷酸或寡核糖核苷酸片段。与硫代磷酸酯寡脱氧核苷酸相比,其中一些MBO在与RNA的亲和力、RNase H激活和抗HIV活性方面表现出改善的特性。此外,这些MBO获得了更可接受的药理学、体内降解和药代动力学特征。