Abstract
The influence of chemical modification on the antiviral activity of oligonucleotides was studied on Green monkey kidney cells (GMK) using a known antisense oligodeoxynucleotide (AS-ODN) directed against the IE-110 gene of HSVl. The highest antiviral activity was observed with ODNs carrying exclusively phosphothioate internucleotide linkages. CVB3-specific ODNs of this type were synthesized and successfully tested for antiviral activity on HeLa cells.