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. 1990 May;34(5):808–812. doi: 10.1128/aac.34.5.808

Inhibition of herpes simplex virus type 2 growth by phosphorothioate oligodeoxynucleotides.

W Y Gao 1, R N Hanes 1, M A Vazquez-Padua 1, C A Stein 1, J S Cohen 1, Y C Cheng 1
PMCID: PMC171696  PMID: 2163243

Abstract

Phosphorothioate homo-oligodeoxynucleotides were found to be potent inhibitors of herpes simplex virus type 2 (HSV-2) but less potent for HSV-1 in cell culture studies. Oligomers with longer chain lengths were more active against HSV-2 than those with shorter ones. Of all the compounds examined, the 28-mer phosphorothioate homo-oligodeoxynucleotides were the strongest inhibitors of HSV-2. The degree of inhibition was related to the base moiety on the order of deoxycytidine = thymidine greater than deoxyadenosine. The inhibition of HSV-2 growth by S-dC28 was dose dependent with a 90% inhibitory dose of 1 microM. At 50 microM, S-dC28 inhibited HeLa S3 cell growth by less than 10%. The anti-HSV-2 activity was time and schedule dependent. The oligomer was most inhibitory to viral growth when present during the 1-h viral adsorption period, and this effect could be enhanced by continuous drug exposure after the adsorption period. S-dC28 was also an effective inhibitor of two HSV-2 drug-resistant mutants: a phosphonoformate-resistant mutant that induces an altered DNA polymerase and a 9-(1,3-dihydroxy-2-propoxymethyl)guanine-resistant mutant that does not induce the viral thymidine kinase. In drug combination studies, phosphonoformate was shown to potentiate the action of S-dC28 against HSV-2 growth. In conclusion, because of their potency and selectivity, phosphorothioate homo-oligodeoxynucleotides are a promising new class of anti-HSV agents.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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