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Ketoconazole impairs biliary excretory function in the isolated perfused rat liver
Naunyn-Schmiedeberg'S Archives of Pharmacology
|June 1, 1987
Summary
Ketoconazole (KT) impairs liver function by reducing bile acid excretion and sulfobromophthalein transport in rats. This intrinsic liver toxicity suggests caution for patients with liver conditions.
Area of Science:
- Pharmacology
- Hepatology
- Toxicology
Background:
- Ketoconazole (KT) is an antifungal medication.
- Hepatic excretory function is crucial for drug metabolism and elimination.
- Understanding drug-induced liver toxicity is essential for patient safety.
Purpose of the Study:
- To investigate the effects of ketoconazole on the excretory function of the isolated perfused rat liver.
- To determine the dose-dependent toxicity of ketoconazole on hepatic transport mechanisms.
Main Methods:
- Isolated perfused rat liver model.
- Administration of ketoconazole at varying concentrations (5 X 10(-5) M and 10(-4) M).
- Measurement of bile acid concentration, excretion rate, bile flow, and sulfobromophthalein transport.
Main Results:
- Ketoconazole caused dose-dependent decreases in bile acid concentration and excretion rate.
- Impaired sulfobromophthalein transport was observed in a dose-dependent manner.
- No significant effects on bile flow rate, perfusate flow, or liver enzyme release were noted.
Conclusions:
- Ketoconazole exhibits intrinsic toxicity in the isolated perfused rat liver.
- The findings suggest caution when prescribing ketoconazole to patients with pre-existing liver conditions (hepatopathic patients).
- Further research into the mechanisms of ketoconazole-induced hepatotoxicity is warranted.