Vasopressin responses to corticotropin-releasing factor and hypertonicity after truncal vagotomy in dogs. Am J Physiol 1996 Jan;270(1 Pt 2):R94-8
Date
01/01/1996Pubmed ID
8769789DOI
10.1152/ajpregu.1996.270.1.R94Scopus ID
2-s2.0-0030029868 (requires institutional sign-in at Scopus site) 1 CitationAbstract
Infusion of corticotropin-releasing factor (CRF) augments the plasma vasopressin response to infusion of hypertonic saline in conscious dogs. Furthermore, afferent vagal nerve input from the abdomen is involved in the control of vasopressin release and may be altered by CRF. The purpose of the present study was to characterize the effect of CRF on the vasopressin response to hypertonic saline and to determine if it is mediated by afferent input carried from the abdominal vagus. Conscious male dogs (n = 5) underwent infusion of isotonic saline (vehicle), CRF (10 or 20 ng.kg-1.min-1), hypertonic saline (0.2 mmol.kg-1.min-1), or the combination of CRF and hypertonic saline. Hypertonic saline increased plasma sodium from 147 +/- 1 to 153 +/- 1 meq/1 and plasma vasopressin from 2.5 +/- 0.1 to 5.8 +/- 0.4 pg/ml. CRF infusion alone had no effect on plasma vasopressin. The addition of 10 or 20 ng.kg-1.min-1 CRF augmented the vasopressin response to hypertonic saline to 7.7 +/- 1.7 and 6.9 +/- 0.3 pg/ml, respectively. Truncal vagotomy did not attenuate the vasopressin response to hypertonic saline with or without CRF infusion. We conclude that CRF augments the vasopressin response to hypertonic saline and that this effect is not mediated via afferents from the abdominal vagus.
Author List
Raff H, Papanek PE, Cowles VEAuthors
Paula Papanek PhD, MPT, LAT, FACSM Associate Professor & Director of Exercise Science in the Exercise Science & Physical Therapy department at Marquette UniversityHershel Raff PhD Professor in the Academic Affairs department at Medical College of Wisconsin
MESH terms used to index this publication - Major topics in bold
AnimalsCorticotropin-Releasing Hormone
Dogs
Drug Combinations
Male
Saline Solution, Hypertonic
Sodium
Vagotomy, Truncal
Vasopressins