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- W1510829178 abstract "[15N]Aspartate and 5-amino-4-imidazolecarboxamide riboside (AICAriboside) were used to evaluate the contribution of the purine nucleotide cycle to ammonia production in renal tubules isolated from control and chronically acidotic rats. Addition of 1 mM AICAriboside to incubation medium containing 2.5 mM [15N] aspartate significantly stimulated production of 15NH3 and 15N in the 6-amino group of adenine nucleotides during a 30-min incubation. In tubules from both control and acidotic animals, the levels of ATP, AMP, and NH3 were increased. In contrast, 5 mM AICAriboside inhibited 15NH3 production and reduced the total purine nucleotide content. In tubules from acidotic rats, enrichment in 15NH3 exceeded that in the 6-amino group of the adenine nucleotides, indicating that no precursor-product relationship existed between the purine nucleotide cycle and ammonia. Conversely, in tubules from control rats, 15N enrichment in the 6-amino group of the adenine nucleotides exceeded that in NH3. This relationship obtained whether or not AICAriboside was included in the incubation mixture. The current investigations show that the metabolism of aspartate through the purine nucleotide cycle is lower in renal tubules obtained from chronically acidotic rats than in control tubules. The observations indicate that AICAriboside has a biphasic effect on renal ammoniagenesis and adenine nucleotide synthesis, and suggest a possible clinical use of AICAriboside in cases of impaired ammonia formation in renal failure." @default.
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- W1510829178 date "1986-05-01" @default.
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- W1510829178 title "Effect of 5-amino-4-imidazolecarboxamide riboside on renal ammoniagenesis. Study with [15N]aspartate." @default.
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- W1510829178 doi "https://doi.org/10.1016/s0021-9258(19)84591-x" @default.
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