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. 1968 May;47(5):1071–1082. doi: 10.1172/JCI105797

Effect of antidiuretic hormone on human small intestinal water and solute transport

Konrad H Soergel 1, George E Whalen 1, John A Harris 1, Joseph E Geenen 1
PMCID: PMC297260  PMID: 5645853

Abstract

The effect of i.v. Pitressin (ADH) in a dose of 1 U/hr on permeability characteristics and on absorptive capacity of the normal human small intestine was investigated. The method of continuous intestinal perfusion was employed with polyethylene glycol 4000 as a nonabsorbable marker. Unidirectional flux rates of Na and H2O were calculated from the disappearance of 22Na and of 3HOH from isotonic saline solution within the intestinal lumen. Each study consisted of two successive perfusion periods: one while the subject was hydrated, the other during ADH infusion or while the subject was dehydrated. Water and sodium absorption from isotonic NaCl occurred in the hydrated state and was abolished by ADH as well as by dehydration in the jejunum. In some instances, net gain of water and sodium in the lumen occurred. In the ileum, ADH and dehydration caused a decrease in water and sodium absorption rate. By contrast, unidirectional flux into the intestinal lumen of water and sodium, as well as dextrose and D-xylose diffusion, remained unchanged by ADH. During perfusions with hypertonic urea solutions the rates of sodium and water entry into the intestine were greatly increased during i.v. ADH infusion, whereas urea loss from the study segment remained constant. ADH in the dosage used did not affect human intestinal motility. The results suggest that circulating ADH in physiologic concentrations affects the small intestine in one of two ways: increased secretion of water and salt into the lumen or direct interference with the active sodium transport mechanism.

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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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