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- W2010486579 abstract "Gluconeogenesis is one of the metabolic pathways severely affected in acute arsenic poisoning. We have studied gluconeogenesis in isolated kidney tubules of male Sprague-Dawley rats to screen various sulfur compounds for antidotal properties against inorganic and organic arsenicals. Freshly prepared kidney cells from starved rats synthesized glucose from added pyruvate (10 mmol/liter) at a rate of 9.74 ± 0.90 nmol/min/mg protein (mean ± SD; n = 61). Gluconeogenesis was inhibited almost 90% in the presence of phenylarsonate (700 μmol/liter), arsenate (350 μmol/liter), arsenite (30 μmol/liter), or PhAsO (1 μmol/liter). With effective antidotes the rate of gluconeogenesis was restored to almost control values within 10 min. Among 21 sulfur compounds tested, only BAL, DMPS, and DMSA were effective in PhAsO poisoning. With inorganic arsenic also DTE and DTT restored the rate of glucose formation. The observed in vitro efficacies were in good agreement with in vivo results obtained with male NMRI mice severely poisoned with arsenite (As2O3, 20mg/kg ≍ 0.2 mmoi As/kg) or PhAsO (3.4 mg/kg ≍ 0.02 mmol As/kg). We conclude that isolated kidney tubules are a useful in vitro screening system (a) to compare the metabolic toxicity of various arsenicals and (b) to evaluate potential antidotes." @default.
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- W2010486579 date "1993-07-01" @default.
- W2010486579 modified "2023-10-14" @default.
- W2010486579 title "Isolated Rat Kidney Tubules as a Screening System for Arsenic Antidotes" @default.
- W2010486579 doi "https://doi.org/10.1006/taap.1993.1136" @default.
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