Abstract:
:Cyclophosphamide given in association with corticosteroids has markedly improved the prognosis of systemic vasculitis. Little information has been reported on cyclophosphamide pharmacokinetics in these diseases and data evaluating its metabolite, 4-hydroxycyclophosphamide/aldophosphamide, pharmacokinetics and concentrations are lacking. Cyclophosphamide was administered as a 1-h intravenous infusion every 3 weeks for six cycles to ten vasculitis patients. Serum cyclophosphamide and 4-hydroxycyclophosphamide/aldophosphamide concentrations were assayed on the first cycle of the treatment by reversed-phase high-pressure liquid chromatography with ultraviolet detection. The mean (+/- SD) 4-hydroxycyclophosphamide/aldophosphamide and cyclophosphamide areas under the serum concentration-time curves were, respectively, 1.86 +/- 1.12 and 154.1 +/- 62.7 mg/L x h with a ratio of 1.30 +/- 0.76%. The mean maximum serum 4-hydroxycyclophosphamide/aldophosphamide was reached 2.3 h after cyclophosphamide administration. The mean (+/- SD) cyclophosphamide and 4-hydroxycyclophosphamide/aldophosphamide half-lives were, respectively, 5.5 +/- 3.1 and 7.6 +/- 2.3 h. The results are consistent with those obtained for cancer patients, in spite of a wide interpatient variability of concentrations and pharmacokinetic parameters.
journal_name
Fundam Clin Pharmacoljournal_title
Fundamental & clinical pharmacologyauthors
Belfayol-Pisanté L,Guillevin L,Tod M,Fauvelle Fdoi
10.1111/j.1472-8206.2000.tb00424.xsubject
Has Abstractpub_date
2000-07-01 00:00:00pages
415-21issue
4eissn
0767-3981issn
1472-8206pii
S0767398100010690journal_volume
14pub_type
临床试验,杂志文章abstract::We studied the effects of KATP channel blockers on [3H]GABA release in the absence of glucose in rat hippocampal slices. The omission of glucose induced a marked increase in the efflux of [3H]GABA, which was antagonized by TTX (1 microM), but not by MK 801 (1 microM) or DNQX (100 microM). Glibenclamide (10-100 microM)...
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