PMID: 9663921Jul 15, 1998Paper

The development of enhanced arterial serotonergic hyperresponsiveness in mineralocorticoid hypertension

Journal of Hypertension
Stephanie W Watts

Abstract

To demonstrate that the receptor in the rat mesenteric artery mediating contraction in response to 5-hydroxytryptamine switches from a 5-hydroxytryptamine-2A to a 5-hydroxytryptamine-2B receptor after 4 weeks of deoxycorticosterone and salt (1.0% NaCl plus 0.2% KCl) therapy, and, as an extension of these studies, to test the hypothesis that this switch occurs prior to the development of hypertension. Rats were administered deoxycorticosterone-salt therapy or no therapy for 1, 3, 5, 7, or 28 days. Additionally, four groups of rats (sham-normal salt, sham-high salt, deoxycorticosterone-normal salt, and deoxycorticosterone-high salt) were administered therapy for 4 weeks (28 days) to distinguish between the roles of salt and blood pressure in serotonergic responsiveness. Superior mesenteric arteries were mounted in tissue baths for measurement of isometric contractile force; systolic blood pressure was measured by a tail-cuff method. Systolic blood pressure was first elevated by deoxycorticosterone-salt therapy relative to that in sham controls on day 5. Contraction in response to phenylephrine was minimally altered after 7 days of deoxycorticosterone-salt therapy. By day 3, the tryptophan metabolite and putative 5-hydroxytryptami...Continue Reading

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Citations

May 30, 2001·International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience·C G NebigilL Maroteaux
Oct 27, 2004·Pharmacology & Therapeutics·Takafumi NagatomoTadazumi Komiyama
Jun 20, 2002·Journal of Cardiovascular Pharmacology·Dominick A Coleman, Raouf A Khalil
May 23, 2000·Annals of Medicine·W H Frishman, P Grewall
Sep 18, 2002·The Journal of Pharmacology and Experimental Therapeutics·Amber RussellStephanie W Watts
Jan 31, 2004·The Journal of Pharmacology and Experimental Therapeutics·Wei NiStephanie W Watts
Aug 10, 2007·The Journal of Pharmacology and Experimental Therapeutics·Kevin K OgdenStephanie W Watts
Mar 10, 1999·The American Journal of Physiology·S W Watts, G D Fink

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