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- W1979738493 abstract "The uptake and metabolism of trichloroethylene (TCE), and the stoichiometric yield and kinetic behavior of one of its major metabolites, trichloroacetic acid (TCA), were compared in Fischer 344 rats and B6C3F1 mice using a physiological model. Physiologically based pharmacokinetic (PB-PK) model parameters (metabolic rate constants and tissue partition coefficients) were determined in male and female B6C3F1 mice and were taken from the literature for the male and female Fischer 344 rats. The kinetic behavior of TCA was described by a classical one-compartment model linked to a PB-PK model for TCE. The TCE blood/air partition coefficients for male and female mice, determined by vial equilibration, were 13.4 and 14.3. The Vmaxe values for male and female mice, using gas uptake techniques, were 32.7 +/- .06 and 23.2 +/- 0.1 mg/kg/hr and the Km was 0.25 mg/liter. The PB-PK model for TCE adequately described the uptake and clearance of TCE in male and female rats exposed to a single, constant concentration of TCE vapor, but failed to describe the uptake and clearance of TCE in male and female mice exposed to a wide range TCE vapor concentrations. Computer-predicted blood concentrations of TCE were generally greater than observed blood concentrations of TCE. The stoichiometric yield of TCA in mice exposed to these TCE vapors was concentration dependent. The capacity for oxidation of TCE was much greater in B6C3F1 mice than in Fischer 344 rats, and as a result the systemic concentration of TCA was greater in these mice than rats. An increased body burden of TCA in B6C3F1 mice may be related to the formation of hepatocellular carcinomas in B6C3F1 mice exposed to TCE." @default.
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- W1979738493 date "1991-06-01" @default.
- W1979738493 modified "2023-10-17" @default.
- W1979738493 title "Physiologically based pharmacokinetic modeling with trichloroethylene and its metabolite, trichloroacetic acid, in the rat and mouse" @default.
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- W1979738493 doi "https://doi.org/10.1016/0041-008x(91)90167-d" @default.
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