Glomerular function of lead-exposed workers

Toxicology Letters
K S ChiaE Lee

Abstract

Among lead-exposed workers, there is evidence of increased mortality from chronic renal diseases (nephritis and nephrosis). Epidemiological studies using early markers of nephropathy among lead-exposed workers failed to demonstrate early renal changes. This study is aimed at assessing the glomerular function of 137 lead-exposed subjects and at evaluating whether changes in markers of glomerular function are related to exposure indices derived from longitudinal blood lead data. A control group of 153 postal workers was also investigated. Several exposure indices were derived for the exposed workers, including a time-integrated index Pb in blood (PbB)int and the number of times the PbB was above critical values (PbB400, PbB500, PbB600). Through multiple linear regression analysis, PbBint was the best predictor of variation in serum beta 2-microglobulin (S beta 2m) and alpha 1-microglobulin (S alpha 1m) and urinary albumin (UA1b). A small but statistically significant difference in the mean beta 2m was found. S beta 2m was also the only marker showing a significantly higher prevalence rate ratio (PRR) of abnormalities among lead-exposed workers. Though there was no clear dose-response relationship with PbBint as the index of dose,...Continue Reading

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Sep 25, 1997·Environmental Health Perspectives·M Loghman-Adham
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