Electrochemical detection of nucleic acids using pentaferrocenyl phosphoramidate α-oligonucleotides
作者:Grégory Chatelain、Albert Meyer、François Morvan、Jean-Jacques Vasseur、Carole Chaix
DOI:10.1039/c0nj00902d
日期:——
We report the synthesis of α-oligonucleotides exhibiting five phosphoramidate linkages bearing a ferrocenyl (Fc) moiety. Three different linkers: ethyl, propyl and 4-methyl-1-ethyl-1,2,3-triazol between the ferrocene (Fc) residue and the phosphoramidate function have been studied. We demonstrated that these Fc5-α-DNA conjugates exhibit similar or even better stability than the wild type β-DNA when hybridized to their complementary β-DNA. Their electrochemical behavior studied in solution by cyclic voltammetry showed that this original structure leads to a strong difference in the Fc environment when the probe is alone or hybridized with a complementary strand. These preliminary electrochemical analyses are very encouraging and augur a good sensitivity of these probes for DNA detection after grafting on an electrode microsystem.
我们报道了合成具有五个磷酰胺链的α-寡核苷酸,这些链上包含了铁酞基(Fc)基团。研究了三种不同的连接子:乙基、丙基和4-甲基-1-乙基-1,2,3-三唑,这些连接子位于铁酞基(Fc)残基和磷酰胺功能之间。我们证明这些Fc5-α-DNA结合物在与其互补的β-DNA杂交时,表现出与野生型β-DNA相似甚至更好的稳定性。在溶液中通过循环伏安法研究的电化学行为显示,当探针单独存在或与互补链杂交时,这种原始结构导致了Fc环境的显著差异。这些初步的电化学分析非常令人鼓舞,并预示着这些探针在电极微系统上 grafting 后用于DNA检测的良好灵敏度。