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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ivorra, M. Dolores Anselmi, Elsa Miquel, Raquel Ziani, Khalid Noguera, M. Antonia Gisbert, Regina D'ocon, Pilar |
| Description | Author Affiliation: Gisbert R ( Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Spain.) |
| Abstract | 1. The role of a constitutively active population of alpha(1D)-adrenoceptors was analysed in arteries obtained from spontaneously hypertensive rats (SHR) and controls (WKY) divided into three groups: young prehypertensive, adult hypertensive, and adult animals chronically treated with captopril (50 mg kg(-1) per day orally) in order to prevent the hypertensive state. 2. In adult SHR, a significant increase in BMY 7378 potency (not in prazosin potency) was observed in aorta, mesenteric artery, and the first and second branches of the small mesenteric arteries with respect to WKY rats. This difference was not observed in iliac and tail arteries, which suggests an increased functional role of alpha(1D)-adrenoceptors only in some vessels of SHR. 3. The increase in the resting tone (IRT) observed in absence of agonist, inhibited by BMY 7378, that represents the constitutively active population of alpha(1D)-adrenoceptors, was also significantly greater in aorta and mesenteric artery from adult SHR. 4. In young and captopril treated adult animals, no differences between strains with respect to BMY 7378 potency, or IRT were observed. 5. The increase in the functional role of alpha(1D)-adrenoceptors and their constitutive activity observed in hypertension is prevented by captopril treatment. The pathological consequence of this change is the slower rate of recovery of the basal tone after removal of an adrenergic stimulus, observed in vessels from hypertensive animals that had shown an increase in the functionality of constitutively active alpha(1D)-adrenoceptors. This change was not observed in prehypertensive or captopril treated animals. |
| ISSN | 00071188 |
| e-ISSN | 14765381 |
| Journal | British Journal of Pharmacology |
| Issue Number | 1 |
| Volume Number | 135 |
| Language | English |
| Publisher | Wiley Online Library(on behalf of The British Pharmacological Society) |
| Publisher Date | 2002-01-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Arteries Physiopathology Hypertension Receptors, Adrenergic, Alpha-1 Physiology Adrenergic Alpha-Agonists Pharmacology Adrenergic Alpha-Antagonists Animals Antihypertensive Agents Aorta, Thoracic Drug Effects Captopril Dose-Response Relationship, Drug Hemodynamics Iliac Artery In Vitro Techniques Mesenteric Arteries Muscle Contraction Muscle Relaxation Muscle, Smooth, Vascular Norepinephrine Phenylephrine Piperazines Prazosin Rats, Inbred SHR Rats, Inbred WKY Tail Blood Supply Vasoconstriction Vasodilation Research Support, Non-U.S. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pharmacology |
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