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Chromosome aberrations and pharmacokinetics in patients receiving tauromustine as either a single or a repeated dose.
Tauromustine (TCNU) is an exploratory drug that has demonstrated activity in various solid tumors. We examined chromosome aberrations and plasma levels of the drug in two groups of patients receiving either a single dose of 130 mg/m2 or 40 mg/m2 on 3 consecutive days. Peak plasma concentrations (mean +/- SD) were obtained at a similar time after both treatments, i.e., at 38 +/- 25, 32 +/- 24, 28 +/- 14, and 40 +/- 26 min after administration of 130 mg/m2 on day 1 and after that of 40 mg/m2 on days 1, 2, and 3, respectively. In addition, the cumulative area under the curve (AUC value) determined after administration of 40 mg/m2 x 3 was similar to that noted after treatment with a single dose of 130 mg/m2, i.e., 180 and 179 micrograms min ml-1, respectively. Both treatments induced chromosome aberrations (CAs) in peripheral blood lymphocytes. A dose-dependent increase in the number of CAs was found, with 40 mg/m2 producing 5.5% CAs and 130 mg/m2 yielding 20.9% CAs at 24 h after treatment. In addition, although the drug concentration declined to a level under the detection limit between the daily treatments, drug-induced chromosome damage was cumulative, with the 90-min values increasing from 4.8% on day 1 to 14.3% CAs on day 3. In individual patients, no correlation was found between CAs and kinetic parameters; however, the total mean CA yield was in agreement with the total drug exposure (CAs, 14.3% and 14.6%, AUC 180 +/- 62.8 and 179 +/- 115 micrograms min ml-1, respectively.B Hartley-Asp, K Hansson, J Vibe-Petersen, H H Hansen, J Polacek, M Ellman, P O Gunnarsson
2156 related Products with: Chromosome aberrations and pharmacokinetics in patients receiving tauromustine as either a single or a repeated dose.
1 kit100 plates100 μg5 mg100 tests100 μg100 assaysRelated Pathways
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