Abstract
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 β2-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 continously exposed to Cd had developed slight tubular damage, as evidenced by an increased urinary excretion of β2-microglobulin and β-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 β2-microglobulin, suggesting an interaction between both treatments. At the end of the study, only the interaction with β2-microglobulin excretion was still evident; that with the urinary excretion of β-N-acetylglucosaminidase and albumin having been masked by the chronic progessive 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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Bernard, A.M., de Russis, R., Ouled Amor, A. et al. Potentiation of cadmium nephrotoxicity by acetaminophen. Arch Toxicol 62, 291–294 (1988). https://doi.org/10.1007/BF00332489
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DOI: https://doi.org/10.1007/BF00332489