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. 1971 Jun;50(6):1231–1240. doi: 10.1172/JCI106600

Renal effects of adenosine 3′,5′-cyclic monophosphate and dibutyryl adenosine 3′,5′-cyclic monophosphate

Evidence for a role for adenosine 3′,5′-cyclic monophosphate in the regulation of proximal tubular sodium reabsorption

John R Gill Jr 1, Alfred G T Casper 1
PMCID: PMC292052  PMID: 4326154

Abstract

Stable water diuresis was produced in anesthetized, hydrocortisone-treated hypophysectomized dogs by infusion of 2.5% dextrose. Infusion of adenosine 3′,5′-cyclic monophosphate (cyclic AMP) in the left renal artery decreased ipsilaterally glomerular filtration rate (GFR), cortical and non-cortical renal plasma flow, and tended to increase urine flow (V) and free-water clearance (CH2O) despite a decrease in mean arterial pressure. Infusion of dibutyryl adenosine 3′,5′-cyclic monophosphate (dibutyryl cyclic AMP) in the left renal artery increased V and CH2O significantly (P<0.01) bilaterally with essentially no change in GFR, in total renal plasma flow or its cortical and non-cortical components. For each kidney the magnitude of the change in V was similar to the magnitude of the change in CH2O and the change in sodium excretion was trivial. Cyclic AMP probably produced its effects on renal hemodynamics and mean arterial pressure wholly or in part through the action of metabolites such as 5′-AMP and adenosine on the renal and systemic vasculature. The absence of an effect of dibutyryl cyclic AMP on renal hemodynamics and its bilateral effect may be explained by the resistance of this nucleotide derivative to metabolism.

Dibutyryl cyclic AMP appears to decrease by direct cellular effect(s) proximal tubular sodium reabsorption but does not prevent virtually complete reabsorption of the increased load of sodium in the distal nephron. This effect on the kidney is qualitatively and quantitatively similar to the effect of renal arterial infusion of isoproterenol.

The results suggest that synthesis of cyclic AMP in proximal renal tubule cells in response to stimulation of beta adrenergic or other receptors can mediate a decrease in the proximal tubular reabsorption of sodium.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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