Nicotine-induced release of vasopressin in the conscious rat: role of opioid peptides and hemodynamic effects.

Détails

ID Serval
serval:BIB_10EDAE016B8B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Nicotine-induced release of vasopressin in the conscious rat: role of opioid peptides and hemodynamic effects.
Périodique
Journal of Pharmacology and Experimental Therapeutics
Auteur(s)
Aubert J.F., Burnier M., Waeber B., Nussberger J., Brunner H.R.
ISSN
0022-3565
Statut éditorial
Publié
Date de publication
1987
Peer-reviewed
Oui
Volume
243
Numéro
2
Pages
681-685
Langue
anglais
Notes
Publication types: Journal Article
Résumé
Nicotine has been shown to stimulate the release of vasopressin and to cause significant hemodynamic changes. The mechanisms leading to enhanced vasopressin secretion and the vascular consequences of the high plasma vasopressin levels during nicotine infusion have not yet been determined. Therefore, the purposes of the present study were 1) to examine in normal conscious rats the role of opioid peptides in the nicotine-induced increase in plasma vasopressin levels and 2) to assess the role of vasopressin in the hemodynamic effects of nicotine (20 micrograms/min for 15 min) using a specific V1 antagonist of the vascular actions of vasopressin. Plasma vasopressin levels were significantly increased in the nicotine-treated animals (39.5 +/- 10 vs. 3.7 +/- 0.6 pg/ml in the controls, P less than .01). Pretreatment with naloxone, an antagonist of opioids at their receptors, did not reduce the vasopressin levels (47.7 +/- 9 pg/ml). Nicotine also increased mean blood pressure (122.5 +/- 2.5 to 145.2 +/- 3.3 mm Hg, P less than .01) and decreased heart rate (461 +/- 6 to 386 +/- 14.5 beats/min, P less than .05). Administration of the vasopressin V1 antagonist before the nicotine infusion did not affect the systemic hemodynamics or the regional blood flow distribution, as assessed by radiolabeled microspheres. Thus, these results suggest that the nicotine-induced secretion of vasopressin is not mediated by opioid receptors and that the high plasma vasopressin levels do not exert any significant hemodynamic effect on cardiac output or blood flow distribution.
Mots-clé
Animals, Consciousness, Dose-Response Relationship, Drug, Endorphins, Hemodynamics, Male, Naloxone, Nicotine, Rats, Rats, Inbred Strains, Vasopressins
Pubmed
Web of science
Création de la notice
25/01/2008 13:56
Dernière modification de la notice
20/08/2019 13:38
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