Characterization of cadmium proteinuria in man and rat
In workers chronically exposed to cadmium and without signs of renal insufficiency, plasma proteins with molecular weight ranging from 11,800 to 450,000 are excreted in greater amount in urine. Increased urinary excretion of low and high molecular weight proteins can occur independently. Because of its greater stability in urine and provided a sensitive immunological technique is used, the determination of retinol-binding protein is a more practical and realiable test of proximal tubular function than ..beta../sub 2/-microglobulin. The evaluation of renal function of workers removed from cadmium exposure indicates that cadmium-induced renal lesions, albeit of slow progression, are not reversible when exposures ceases. In workers chronically exposed to cadmium or removed from cadmium exposure, metallothionein in urine is directly correlated with cadmium in urine but not with cadmium in blood or years of cadmium exposure. The association between cadmium in urine and metallothionein in urine is independent of the status of renal function and the intensity of current exposure to cadmium. Whereas the repeated IP injection of high doses of cadmium to rat gives rise to a mixed or tubular type proteinuria, the prolonged oral administraitn of cadmium results mainly in the development of a glomerular type proteinuria. The former is usually reversible after cessation of treatment whereas the latter is not. Circulating antiglomerular basement membrane antibodies have been found in man and in rat chronically exposed to cadmium. The pathogenic significance of this finding deserves further investigation. 10 references, 5 figures, 1 table.
- Research Organization:
- Universite Catholique de Louvain, Brussels, Belgium
- OSTI ID:
- 5775593
- Journal Information:
- Environ. Health Perspect.; (United States), Vol. 54
- Country of Publication:
- United States
- Language:
- English
Similar Records
Long-term observations on tubular and glomerular function in cadmium-exposed persons
Chromium-induced kidney disease
Related Subjects
CADMIUM
HEALTH HAZARDS
KIDNEYS
PATHOLOGICAL CHANGES
URINE
CHEMICAL ANALYSIS
BLOOD
CHRONIC EXPOSURE
DATA COMPILATION
DOSE-RESPONSE RELATIONSHIPS
EXCRETION
INJURIES
METALLOTHIONEIN
OCCUPATIONAL EXPOSURE
PROTEINS
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
BODY
BODY FLUIDS
CLEARANCE
DATA
ELEMENTS
HAZARDS
INFORMATION
MATERIALS
METALLOPROTEINS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANS
WASTES
560306* - Chemicals Metabolism & Toxicology- Man- (-1987)