Optimized Solid‐Phase‐Assisted Synthesis of Oleic Acid Containing siRNA Nanocarriers
作者:Sören Reinhard、Wei Zhang、Ernst Wagner
DOI:10.1002/cmdc.201700350
日期:2017.9.7
double bonds of oleic acid. Under aqueous conditions, these TFA adducts of oleic acid are converted into hydroxystearic acid derivatives. The cleavage protocol was optimized to decrease TFA adducts. The pure oleic acid (C18:1) containing lipo-oligomer was compared with analogous structures containing saturated or modified hydrophobic moieties (stearic acid (C18:0), hydroxystearic acid, and 8-nonanamidooctanoic
包含不饱和油酸的阳离子脂质低聚物是有效的siRNA载体,基于静电和疏水脂质多聚体的形成以及内体膜失稳。脂质低聚物可以通过固相支持的合成以序列限定的形式产生。然而,三氟乙酸(TFA)介导的对酸不稳定的保护基的去除和从树脂上的裂解可伴随有将TFA加至油酸的双键上而引起的副产物。在水性条件下,这些油酸的TFA加合物被转化为羟基硬脂酸衍生物。优化裂解方案以减少TFA加合物。将含脂低聚物的纯油酸(C18:1)与含饱和或改性疏水部分(硬脂酸(C18:0),羟基硬脂酸,和8-壬酰胺基辛酸)。包含完整油酸的结构相对于其对应物显示出良好的pH依赖性的裂解活性,有效的基因沉默和出色的细胞耐受性。