Synthesis and properties of 2′-O,4′-C-Ethylene-Bridged nucleic acids (ENA) as effective antisense oligonucleotides
作者:Koji Morita、Miho Takagi、Chikako Hasegawa、Masakatsu Kaneko、Shinya Tsutsumi、Junko Sone、Tomio Ishikawa、Takeshi Imanishi、Makoto Koizumi
DOI:10.1016/s0968-0896(03)00115-9
日期:2003.5
bridged nucleic acids (2',4'-BNA) or locked nucleic acids (LNA). Both the 2'-O,4'-C-ethylene- and propylene-linkage within these nucleosides restrict the sugar puckering to the N-conformation of RNA as do 2',4'-BNA/LNA. Furthermore, ethylene-bridged nucleic acids (ENA) having 2'-O,4'-C-ethylene nucleosides had considerably increased the affinity to complementary RNA, and were as high as that of 2',4'-BNA/LNA
合成了新型双环核苷,2'-O,4'-C-乙烯核苷和2'-O,4'-C-丙烯核苷,作为反义寡核苷酸的构建基块,以进一步优化2'-O,4'-桥连核酸(2',4'-BNA)或锁定核酸(LNA)的C-亚甲基键。这些核苷中的2'-O,4'-C-乙烯-和丙烯键都将糖的褶皱限制为RNA的N-构象,就像2',4'-BNA / LNA一样。此外,具有2'-O,4'-C-乙烯核苷的乙烯桥连核酸(ENA)大大提高了对互补RNA的亲和力,并且与2',4'-BNA / LNA(DeltaT (m)= + 3,每次修改约5摄氏度。另一方面,添加2'-O,4' 寡核苷酸中的-C-丙烯修饰导致与互补RNA的亲和力降低。至于对核酸酶的稳定性,在寡核苷酸中掺入一个2'-O,4'-C-乙烯或一个2'-O,4'-C-丙烯核苷可显着提高其对核酸外切酶的抗性至大于2'的程度。 ,4'-BNA / LNA。这些结果表明ENA比2',4'-BNA