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Renal fumarase-activities during experimental and chronic human pyelonephritis
Experimental Pathology
|January 1, 1982
Summary
Fumarase (FUM) activity in kidneys changes over time during chronic pyelonephritis (PN). Initially increasing, FUM levels eventually decrease, especially in tubules and medulla, correlating with histological damage in experimental and human cases.
Area of Science:
- Biochemistry
- Nephrology
- Pathology
Background:
- Chronic pyelonephritis (PN) involves complex renal changes.
- Understanding enzyme activity alterations is crucial for diagnosing and managing PN.
Purpose of the Study:
- To investigate fumarase (FUM) activity in experimental and human pyelonephritis.
- To correlate FUM activity with histological findings in chronic kidney disease.
Main Methods:
- Simultaneous analysis of renal enzyme activity (fumarase) and quantitative histology.
- Examination of experimental rabbit kidneys and human pyelonephritic nephrocirrhosis samples.
- Statistical analysis using the universally applied t-test (p < 0.001).
Main Results:
- Glomerular FUM activity initially increased, then decreased but remained elevated until 212 days.
- Cortical tubular FUM activity steeply increased then became depressed, especially after 212 days.
- Medullary FUM activity followed a similar pattern, with pathological depression by 212 and 261 days.
- Human samples showed significantly reduced FUM activity in glomeruli and tubules compared to normal kidneys.
Conclusions:
- Fumarase activity undergoes significant temporal changes during chronic pyelonephritis.
- Decreased FUM activity in tubules and medulla correlates with advanced disease and histological damage.
- FUM levels may serve as a biomarker for pyelonephritis progression and severity.