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Taurine metabolism in experimental renal failure
Kidney International. Supplement
|November 1, 1983
Summary
Taurine levels change in rats with kidney failure. In acute renal failure, taurine increases in plasma and liver but decreases in the heart. Chronic renal failure shows increased brain taurine, potentially compensating for neuroexcitability.
Area of Science:
- Biochemistry
- Nephrology
- Physiology
Background:
- Taurine is crucial for ionic balance in excitable tissues, particularly the heart.
- Its role in uremia, a condition of kidney failure, requires investigation.
Purpose of the Study:
- To examine taurine concentrations in various tissues during acute renal failure (ARF) and chronic renal failure (CRF).
- To correlate taurine levels with markers of kidney dysfunction and potential complications.
Main Methods:
- Measurement of taurine in plasma, liver, muscle, heart, and brain of Wistar rats.
- Induction of ARF via bilateral nephrectomy and CRF via 5/6 nephrectomy.
- Analysis of taurine levels at different time points post-nephrectomy.
Main Results:
- In ARF, plasma and liver taurine increased significantly, while heart taurine decreased, correlating with elevated BUN and creatinine.
- In CRF, brain taurine levels rose by 70%, with elevated gamma-aminoisobutyric acid, while other tissues showed no change.
- Hepatic elimination and/or reduced synthesis may counteract taurine accumulation in uremia.
Conclusions:
- Cardiac taurine depletion in ARF may contribute to uremic heart disease.
- Elevated brain taurine in CRF could be a compensatory mechanism for increased neuroexcitability.
- Taurine metabolism is significantly altered in experimental models of renal failure.