Bernard, Alfred
[UCL]
de Russis, R
Amor, A O
Lauwerys, Robert
[UCL]
The possible interactions between acetaminophen and cadmium (Cd) on the kidney were investigated in female Sprague-Dawley rats. Acetaminophen was administered in the food at an average dose of 900 mg/kg and Cd in drinking water at the concentration of 200 ppm. The treatment with acetaminophen and Cd lasted 2 and 10 months, respectively. No interaction between Cd and acetaminophen was observed during the period of their concomitant administration: the increase in albuminuria caused by Cd and acetaminophen was additive, while the tubular impairment caused by acetaminophen (increased beta 2-microglobulinuria and decreased kidney concentrating ability) was not exacerbated by Cd. None of these treatments affected the glomerular filtration rate. Four months after the end of acetaminophen treatment, the renal changes had almost completely disappeared in the rats which had received the analgesic alone. Those continuously exposed to Cd had developed slight tubular damage, as evidenced by an increased urinary excretion of beta 2-microglobulin and beta-N-acetylglucosaminidase. By contrast, rats pretreated with acetaminophen for 2 months and exposed to Cd showed a marked increase in urinary excretion of albumin and beta 2-microglobulin, suggesting an interaction between both treatments. At the end of the study, only the interaction with beta 2-microglobulin excretion was still evident; that with the urinary excretion of beta-N-acetylglucosaminidase and albumin having been masked by the chronic progressive nephrosis affecting most animals at that stage. As acetaminophen had no effect on the renal accumulation of Cd, it may be concluded that pretreatment with this analgesic at a dose causing slight tubular dysfunction renders rat kidney more sensitive to the nephrotoxic action of Cd. This observation may be of clinical relevance for population groups occupationally or environmentally exposed to Cd.
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Bibliographic reference |
Bernard, Alfred ; de Russis, R ; Amor, A O ; Lauwerys, Robert. Potentiation of cadmium nephrotoxicity by acetaminophen.. In: Archives of toxicology, Vol. 62, no. 4, p. 291-4 (1988) |
Permanent URL |
http://hdl.handle.net/2078.1/14030 |