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Vasopressin responses to corticotropin releasing factor and hyperosmolality in conscious dogs. Am J Physiol 1986 Dec;251(6 Pt 2):R1235-9

Date

12/11/1986

Pubmed ID

3024513

DOI

10.1152/ajpregu.1986.251.6.R1235

Scopus ID

2-s2.0-0023013819   17 Citations

Abstract

We recently reported that ovine corticotropin releasing factor (CRF) infusion in conscious dogs elevated plasma vasopressin. The present study examines the vasopressin, adrenocorticotropic hormone (ACTH), and cortisol responses to CRF infusion (20 ng X kg-1 X min-1), to hypertonic saline infusion (NaCl 0.054 meq X kg-1 X min-1), and to simultaneous coinfusion of CRF and NaCl (CRF + NaCl) without (no-dex) or with (dex-treated) dexamethasone pretreatment in six conscious dogs (6-8 experiments/dog). CRF had no significant effect on plasma sodium or osmolality, blood pressure, or heart rate. NaCl increased plasma sodium from 146 +/- 1 to 151 +/- 1 meq/l and plasma osmolality from 298 +/- 3 to 305 +/- 3 mosmol/kg. Vasopressin increased significantly during CRF (2.1 +/- 0.5 to 4.8 +/- 1.1 pg/ml) and NaCl (1.9 +/- 0.3 to 5.0 +/- 0.8 pg/ml). Coinfusion of CRF and NaCl resulted in a response larger than the sum of the two infusions alone (3.0 +/- 1.6 to 31.4 +/- 18.5 pg/ml). The ACTH response to CRF (45 +/- 8 to 288 +/- 88 pg/ml) was not augmented by coinfusion with NaCl. DEX attenuated the vasopressin and ACTH responses to each infusion. We conclude that CRF-induced increases in vasopressin are augmented by a simultaneous osmotic stimulus. In addition, the plasma vasopressin responses to CRF and/or hypertonic saline infusion are inhibited by glucocorticoid pretreatment.

Author List

Raff H, Skelton MM, Merrill DC, Cowley AW Jr

Authors

Allen W. Cowley Jr PhD Professor in the Physiology department at Medical College of Wisconsin
Hershel Raff PhD Professor in the Medicine department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Adrenocorticotropic Hormone
Animals
Corticotropin-Releasing Hormone
Dexamethasone
Dogs
Electrolytes
Female
Hydrocortisone
Infusions, Intravenous
Kinetics
Male
Saline Solution, Hypertonic
Sodium Chloride
Vasopressins
Water-Electrolyte Balance
jenkins-FCD Prod-484 8aa07fc50b7f6d102f3dda2f4c7056ff84294d1d