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pubmed-article:9736571pubmed:abstractTextPentoxifylline has immunomodulatory properties and has been shown to decrease organ damage and improve survival in animals with gram-negative sepsis or endotoxemia. This effect is mediated by a reduction in endotoxin-induced production of tumor necrosis factor alpha (TNF-alpha) by the host. In earlier studies, we observed an unexpected increase in mortality in mice infected with Candida albicans that were given pentoxifylline even though concentrations of TNF-alpha in serum were not affected. The current study was designed to determine whether the pharmacokinetics of pentoxifylline and its metabolites were altered in C. albicans-infected mice and, if so, whether these changes could have contributed to the increased mortality. Noninfected mice and mice infected with C. albicans were treated with pentoxifylline (60 mg/kg of body weight) intraperitoneally every 8 h. Serum was collected from animals after one (day 0), four (day 1), or seven (day 2) injections of pentoxifylline or saline (controls). The first dose was administered 6 h after C. albicans infection. Serum was pooled. Concentrations of pentoxifylline and metabolites I, IV, and V were determined by capillary gas chromatography. Renal function and hepatic profiles were assessed. Pharmacokinetic parameters (maximum concentration of pentoxifylline in serum, half-life, and area under the concentration-time curve from 0 h to infinity [AUC(0)-infinity]) for all noninfected mice were similar and did not differ from those for day 0-infected mice. For day 1-infected mice, values of these three pharmacokinetic parameters for pentoxifylline and metabolite I were increased two- to fourfold over values for noninfected and day 0-infected mice. For metabolites IV and V, the AUC(0)-infinity was increased approximately eightfold over control values. In addition, day 1-infected mice demonstrated evidence of renal and hepatic dysfunction. In summary, C. albicans infection produced marked changes in the pharmacokinetics of pentoxifylline and its metabolites in the mice. The high concentrations of pentoxifylline and its metabolites in serum attained in infected mice may have contributed to the increased mortality of mice with systemic candidiasis.lld:pubmed
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pubmed-article:9736571pubmed:authorpubmed-author:SmithR PRPlld:pubmed
pubmed-article:9736571pubmed:authorpubmed-author:MillerKKlld:pubmed
pubmed-article:9736571pubmed:authorpubmed-author:GordonM AMAlld:pubmed
pubmed-article:9736571pubmed:authorpubmed-author:DavisP JPJlld:pubmed
pubmed-article:9736571pubmed:authorpubmed-author:BaltchA LALlld:pubmed
pubmed-article:9736571pubmed:authorpubmed-author:LouisSSlld:pubmed
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pubmed-article:9736571pubmed:volume42lld:pubmed
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pubmed-article:9736571pubmed:pagination2405-9lld:pubmed
pubmed-article:9736571pubmed:dateRevised2009-11-18lld:pubmed
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pubmed-article:9736571pubmed:year1998lld:pubmed
pubmed-article:9736571pubmed:articleTitlePharmacokinetics of pentoxifylline and its metabolites in healthy mice and in mice infected with Candida albicans.lld:pubmed
pubmed-article:9736571pubmed:affiliationAlbany College of Pharmacy, New York State Department of Health, Albany, New York, USA.lld:pubmed
pubmed-article:9736571pubmed:publicationTypeJournal Articlelld:pubmed
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