Abstract
The effect of topical and systemic treatment with 9-(1,3-dihydroxy-2-propoxymethyl)guanine on the evolution of herpes simplex virus-induced skin infection in hairless mice was investigated. Systemic (subcutaneous) treatment with a 10-mg/kg dose and topical applications with a 5% cream started up to 48 h after infection prevented the development of severe skin lesions and a fatal outcome. However, the establishment of latent infections was prevented only by topical treatment started at 6 h after infection. Systemic (50 mg/kg) and topical treatments started 48 h after infection reduced virus titers in the skin and ganglia and promoted rapid clearance of virus from these sites. The clearance of infectious virus from ganglia during the acute phase of infection was followed by early establishment of latency. 9-(1,3-Dihydroxy-2-propoxymethyl)guanine (0.03 microgram/ml) significantly inhibited the synthesis of infectious virus in explant cultures of latently infected ganglia, and at concentrations higher than 8 micrograms/ml no infectious virus was detectable in ganglia explant cultures.
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