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Reference values for early markers of renal damage.
A Mutti1, R Alinovi, E Bergamaschi
1Laboratory of Industrial Toxicology, University of Parma, Italy.
The Science of the Total Environment
|June 9, 1992
Summary
Monitoring early kidney damage using urinary protein markers requires careful standardization due to high variability. Repeated measurements are crucial for accurate diagnosis in health surveillance programs assessing exposure to nephrotoxic chemicals.
Area of Science:
- Toxicology
- Nephrology
- Biomarkers
Background:
- Sensitive immunoassays measure urinary protein excretion for early detection of kidney damage.
- Health surveillance programs monitor groups at risk of nephrotoxic chemical exposure.
- Establishing reference limits for renal function markers is challenging.
Purpose of the Study:
- To address methodological challenges in using early renal damage markers.
- To optimize monitoring strategies for individuals exposed to nephrotoxic substances.
- To improve the reliability of health surveillance programs.
Main Methods:
- Utilized sensitive immunoassays to quantify urinary high and low molecular weight proteins.
- Emphasized the need for standardized sampling conditions to account for intra-individual variability.
- Advocated for repeated measurements to establish a diagnosis of renal dysfunction.
Main Results:
- Urinary protein excretion is a key indicator for monitoring renal impairment.
- Significant intra-individual variability exists for all indicators of renal impairment.
- Physiological conditions can cause transient changes in renal function, exceeding reference limits.
Conclusions:
- Standardized sampling and repeated measurements are essential for accurate interpretation of renal biomarkers.
- Early detection of renal damage requires robust methodologies to overcome biological variability.
- Effective health surveillance relies on precise monitoring of kidney function in at-risk populations.