The invention features polynucleotide constructs containing one or more components (i) containing a disulfide linkage, where each of the one or more components is attached to an internucleotide bridging group or a terminal group of the polynucleotide construct, and each of the one or more components (i) contains one or more bulky groups proximal to the disulfide group. The invention also features polynucleotide constructs containing one or more components (i) containing a disulfide linkage, where each of the one or more components (i) is attached to an internucleotide bridging group or a terminal group of the polynucleotide construct, and each of the one or more components (i) contains at least 4 atoms in a chain between the disulfide linkage and the phosphorus atom of the internucleotide bridging group or the terminal group; and where the chain does not contain a phosphate, an amide, an ester, or an alkenylene. The invention also features methods of delivering a polynucleotide to a cell using the polynucleotide constructs of the invention.
本发明涉及一种聚核苷酸构建物,其包含一个或多个组分(i),该组分包含一个二
硫键,其中每个组分中的一个或多个组分连接到聚核苷酸构建物的核苷酸桥接基团或末端基团上,并且每个组分(i)在二
硫键附近包含一个或多个笨重基团。本发明还涉及一种聚核苷酸构建物,其包含一个或多个组分(i),该组分包含一个二
硫键,其中每个组分中的一个或多个组分连接到聚核苷酸构建物的核苷酸桥接基团或末端基团上,并且每个组分(i)在二
硫键和核苷酸桥接基团或末端基团的
磷原子之间的链中至少含有4个原子;并且链中不含有
磷酸盐、酰胺、酯或烯基烃。本发明还涉及使用本发明的聚核苷酸构建物向细胞传递聚核苷酸的方法。