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Research Article Free access | 10.1172/JCI107813

Cellular Action of Antidiuretic Hormone in Mice with Inherited Vasopressin-Resistant Urinary Concentrating Defects

Thomas P. Dousa and Heinz Valtin

Division of Nephrology and Internal Medicine, Mayo Clinic and Foundation, Rochester, Minnesota 55901

Department of Physiology and Biophysics, Mayo Clinic and Foundation, Rochester, Minnesota 55901

Department of Physiology, Dartmouth Medical School, Hanover, New Hampshire 03755

Find articles by Dousa, T. in: PubMed | Google Scholar

Division of Nephrology and Internal Medicine, Mayo Clinic and Foundation, Rochester, Minnesota 55901

Department of Physiology and Biophysics, Mayo Clinic and Foundation, Rochester, Minnesota 55901

Department of Physiology, Dartmouth Medical School, Hanover, New Hampshire 03755

Find articles by Valtin, H. in: PubMed | Google Scholar

Published September 1, 1974 - More info

Published in Volume 54, Issue 3 on September 1, 1974
J Clin Invest. 1974;54(3):753–762. https://doi.org/10.1172/JCI107813.
© 1974 The American Society for Clinical Investigation
Published September 1, 1974 - Version history
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Abstract

Previous work has suggested that resistance to vasopressin in two strains of mice with nephrogenic deficiency of urinary concentration may entail a defect in the action of vasopressin at the cellular level. Several components involved in this action were therefore examined in vitro in renal medullary tissues from control mice (genotype VII +/+) and two genotypes with mild diabetes insipidus (DI +/+ nonsevere) and marked (DI +/+ severe) vasopressin-resistant concentrating defects. No significant differences were found in the affinity of adenylate cyclase for [8-arginine]-vasopressin (AVP), tested over a range of hormone concentration from 10-10 to 10-5 M. However, maximal stimulation of adenylate cyclase by saturating concentrations of AVP (intrinsic activity) was markedly decreased from control values in DI +/+ severe mice, and decreased to a lesser extent in DI +/+ nonsevere animals. A significant correlation was found between the activity of adenylate cyclase maximally stimulated by AVP in a given genotype, and the urine osmolality in the same animals. There were no significant differences in maximal stimulation of renal medullary adenylate cyclase in control experiments: not when stimulated nonspecifically by sodium fluoride, nor when stimulated by AVP in tissues from rats with induced water diuresis as compared to antidiuretic rats. Nor were there significant differences between VII +/+ and DI +/+ severe mice in the activity of renal cortical adenylate cyclase, either basal or when stimulated by parathyroid hormone. Furthermore, the abnormal genotypes did not differ significantly from control mice in the renal medullary activities of cyclic AMP phosphodiesterase or cyclic AMP-dependent protein kinase, nor in the content of microtubular subunits (assessed as colchicinebinding protein). The results are compatible with the view that impaired stimulation of renal medullary adenylate cyclase by vasopressin might be the sole or contributing cause of the vasopressin-resistant concentrating defect in the diseased mice; however, a causal relationship has not yet been proved.

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