Linked Life Data

2854453

Source:http://linkedlifedata.com/resource/pubmed/id/2854453

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pubmed-article:2854453pubmed:abstractTextThe acyclic guanosine analog (R,S)-9-[4-hydroxy-2-(hydroxymethyl)butyl]guanine, (+/-)2HM-HBG, is an effective inhibitor of herpes simplex virus and varicella-zoster virus infections in vitro. This report is concerned with the pharmacokinetic evaluation of the drug in rats and monkeys and its antiviral activity in African green monkeys infected with simian varicella virus (SVV), a virus closely related to varicella-zoster virus that is also susceptible to inhibition by (+/-)2HM-HBG. Elimination half-lives in plasma following intravenous administration to monkeys (100 mumol/kg of body weight) ranged from 1.8 to 2.2 h, and total body clearance was 9.0 +/- 0.4 ml/min per kg (mean +/- standard error). After oral administration, levels in plasma were low, with a maximum concentration of the drug of only 3.1 +/- 0.8 microM, a time to reach maximum concentration of drug of 2.7 +/- 0.4 h, and an oral bioavailability of 10.6 +/- 1.4%. Because of the low oral bioavailability, SVV-infected monkeys were treated intramuscularly with (+/-)2HM-HBG. (+/-)2HM-HBG at a dosage of 10 mg/kg of body weight per day allowed moderate viremia, whereas a dosage of 30 mg/kg of body weight per day strongly suppressed viremia with minimal numbers of virus plaques from blood specimens collected at days 3, 5, and 7 postinfection and complete clearance at day 9 postinfection. Titers of antibody to SVV were also low. Treatment three times daily was somewhat more efficacious than treatment twice daily. Thus, (+/-)2HM-HBG is an effective inhibitor of SVV replication in vivo, despite the fact that leves of (+/-)2HM-HBG in plasma were low at extended periods of time and below the concentration of drug giving 50% inhibition of plaque formation obtained in vitro.lld:pubmed
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pubmed-article:2854453pubmed:articleTitlePharmacokinetics and antiviral activity in simian varicella virus-infected monkeys of (R,S)-9-[4-hydroxy-2-(hydroxymethyl) butyl]guanine, an anti-varicella-zoster virus drug.lld:pubmed
pubmed-article:2854453pubmed:affiliationDepartment of Antiviral Therapy, Research and Development, Astra Alab AB, Södertälje, Sweden.lld:pubmed
pubmed-article:2854453pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:2854453pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
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