Abstract |
The pharmacokinetic parameters of 5-fluorouracil were compared after intravenous administration at a dose of 30 mg/kg to control Sprague-Dawley rats and to rats with diabetes mellitus induced by streptozotocin (DMIS). In DMIS rats, the area under the plasma concentration-time curve from time zero to time infinity (AUC) was significantly smaller (603 versus 909 microg min/ml) due to the significantly faster total body clearance (Cl; 47.8 versus 33.0 ml/min/kg). The faster Cl was due to the significantly faster renal (8.54 versus 4.02 ml/min/kg) and nonrenal (38.5 versus 28.7 ml/min/kg) clearances. In DMIS rats, the total amount of unchanged 5-fluorouracil excreted in 24 h urine was significantly greater (34.1% versus 13.0% of intravenous dose) due to the urine flow rate-dependent renal clearance of 5-fluorouracil in rats (the greater the urine flow rate, the greater the urinary excretion of 5-fluorouracil). Greater urinary excretion and a significantly smaller AUC resulted in a significantly faster Cl(r) in DMIS rats. The faster Cl(nr) in DMIS rats could be due to an increase in the expression and mRNA level of CYP1A1/2 in the rats.
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Authors | Young H Choi, Ae K Lee, Soo K Bae, Sun O Kim, Myung G Lee |
Journal | Biopharmaceutics & drug disposition
(Biopharm Drug Dispos)
Vol. 26
Issue 3
Pg. 93-8
(Apr 2005)
ISSN: 0142-2782 [Print] England |
PMID | 15674819
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright 2005 John Wiley & Sons, Ltd. |
Chemical References |
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Topics |
- Animals
- Chromatography, High Pressure Liquid
- Diabetes Mellitus, Experimental
(metabolism)
- Fluorouracil
(administration & dosage, blood, pharmacokinetics, urine)
- Injections, Intravenous
- Male
- Metabolic Clearance Rate
- Rats
- Rats, Sprague-Dawley
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