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Renal handling of nourseothricin
H Bräunlich1, H Hoffmann, H Bocker
1Institute of Pharmacology and Toxicology, Friedrich Schiller University Jena.
Die Pharmazie
|March 1, 1988
Summary
Nourseothricin is excreted by the kidney, potentially causing nephrotoxicity. Studies show it accumulates in renal cortical slices via binding, not active transport, suggesting a distinct kidney uptake mechanism.
Area of Science:
- Pharmacology
- Nephrology
- Toxicology
Background:
- Nourseothricin is primarily excreted by the kidneys.
- Administration of nourseothricin can lead to observable signs of nephrotoxicity.
- Understanding the renal handling of nourseothricin is crucial for assessing its safety profile.
Purpose of the Study:
- To characterize the renal handling of nourseothricin.
- To investigate the mechanism of nourseothricin accumulation in kidney tissue.
- To determine if nourseothricin interacts with the organic anion transport system.
Main Methods:
- Experiments were conducted using renal cortical slices.
- Nourseothricin accumulation was measured under various conditions.
- The effect of nourseothricin on p-aminohippurate (PAH) transport was assessed.
Main Results:
- Nourseothricin demonstrated significant accumulation in renal cortical slices.
- This accumulation was not affected by nitrogen atmosphere, PAH, probenecid, or trishydroxyaminomethane.
- Nourseothricin did not influence the renal tubular transport system for organic anions (PAH).
- Age-dependent differences in accumulation were not observed.
- The data indicated binding as the cause of accumulation, excluding active tubular transport.
Conclusions:
- Nourseothricin exhibits distinct uptake in kidney tissue.
- Accumulation in renal cortical slices is primarily due to binding, not active transport.
- Nourseothricin does not interfere with the organic anion transport system in the kidneys.