Translocation of Oligonucleotide-Oligosaccharide Complexes into Cells of the Brain.

Irradiation of a mixture of oligonucleotides with dextran resulted in the formation of a complex that is detected by a decelerated migration of an irradiated sample in electrophoretic gel compared to a non-irradiated one. When injected into the brain of neonatal rats, the formed complex penetrated into the cells 3 times easier compared to the original oligonucleotide, thus indicating that the use of radiation crosslinking of oligonucleotides with oligosaccharides is promising to enhance the efficiency of delivery of gene-targeted oligonucleotide drugs into cells.