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The relationships of urinary metallothionein with other indicators of renal dysfunction in people living in a cadmium-polluted area in Japan.

Authors
Type
Published Article
Journal
Journal of applied toxicology : JAT
Publication Date
Volume
8
Issue
1
Pages
15–21
Identifiers
PMID: 2451687
Source
Medline

Abstract

An epidemiologic investigation was carried out to study the significance of urinary excretion of metallothionein (MT) in people aged 50 years and over living in a cadmium (Cd)-polluted area in Japan. The urinary level of MT was compared with various parameters (age, urinary alpha 1-microglobulin (alpha 1-MG), beta 2-microglobulin (beta 2-MG), total protein, Cd, copper (Cu), and zinc (Zn), and relative clearances to creatinine of alpha 1-MG, beta 2-MG, phosphate and uric acid). It was found that the urinary excretion of MT is closely associated with Cd and the indices of renal dysfunction listed above. This observation was more remarkable in women than men. When subjects with signs of renal dysfunction were compared as a group to those with normal renal functions, the excreted amount of MT in the former is significantly greater. The results support the notion that the urinary excretion of MT reflects not only Cd exposure levels but also renal dysfunction caused by long-term Cd exposure.

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