Abstract
A guanosine analog, 9-[(1,3-dihydroxy-2-propoxy)methyl]guanine (DHPG), was found to inhibit herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2, cytomegalovirus, and Epstein-Barr virus replication by greater than 50% at concentrations that do not inhibit cell growth in culture. The potency of the drug against all of these viruses is greater than that of 9-[(2-hydroxyethoxy)methyl]guanine (acyclovir). DHPG was active against HSV-1 growth during the early phase of virus replication and had no activity when added at a later time after infection. Its antiviral activity was irreversible. Thymidine partially neutralized its action. The anti-HSV-1 activity of DHPG was dependent on the induction and the properties of virus-induced thymidine kinase. Virus variants that induced altered virus thymidine kinase and became resistant to acyclovir were still as sensitive to DHPG as the parental virus. DHPG is active against five different HSV variants with induced altered DNA polymerase and resistance to acyclovir.
MeSH Terms
Acyclovir/analogs & derivatives,pharmacology
Animals
Cytomegalovirus/drug effects,physiology
DNA-Directed DNA Polymerase/metabolism
Ganciclovir
Herpesviridae/drug effects,physiology
Herpesvirus 4, Human/drug effects,physiology
Humans
Infant, Newborn
Male
Simplexvirus/drug effects
Thymidine Kinase/metabolism
Virus Replication/drug effects
Chemicals
Thymidine Kinase
DNA-Directed DNA Polymerase
Ganciclovir
Acyclovir
Authors & Affiliations
7 authors, click to expand affiliations / ORCID
Cheng Y C
Huang E S
Lin J C
Mar E C
Pagano J S
Dutschman G E
Grill S P
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