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The absence of any effect of alpha-human atrial natriuretic peptide on sodium transport and osmotic water flow in the toad bladder
Authors:F Marumo  H Sakamoto
Abstract:Synthesized alpha-human atrial natriuretic peptide (alpha-hANP), at 10(-6) M, failed to inhibit short-circuit current and basal and 10 mU/ml vasopressin-stimulated osmotic water flow in the bladder either pretreated with cyclooxygenase inhibitor, or preincubated with arachidonic acid, a precursor of PGE2. These results indicate alpha-hANP to have no direct effect on sodium transport and water permeability in the bladder, and no evidence was obtained indicating that alpha-hANP suppresses vasopressin-stimulated water flow by increasing PGE2 production.
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