Long-term nitric oxide synthase inhibition and distensibility of carotid artery in intact rats.

Details

Serval ID
serval:BIB_4C6D786D3787
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Long-term nitric oxide synthase inhibition and distensibility of carotid artery in intact rats.
Journal
Hypertension
Author(s)
Delacrétaz E., Hayoz D., Osterheld M.C., Genton C.Y., Brunner H.R., Waeber B.
ISSN
0194-911X
Publication state
Published
Issued date
1994
Peer-reviewed
Oui
Volume
23
Number
6 Pt 2
Pages
967-970
Language
english
Notes
Journal Article Research Support, Non-U.S. Gov't --- Old month value: Jun
Abstract
The goal of the present study was to evaluate the effect of long-term nitric oxide synthase inhibition by NG-nitro-L-arginine-methyl ester (L-NAME) on the morphology and viscoelastic properties of the carotid arteries in rats. Twelve-week-old Wistar-Kyoto rats were treated for 6 weeks with either the nitric oxide synthase inhibitor L-NAME (0.4 g/L in drinking water; L-NAME rats, n = 13) or tap water (control rats, n = 13). Age-matched spontaneously hypertensive rats (SHR, n = 14) received tap water for the same period. The internal diameter of the common carotid artery was measured continuously with an echo-tracking device with the rats under anesthesia with halothane. Intra-arterial pressure was monitored on the contralateral side. L-NAME rats exhibited arterial pressures similar to those of SHR. The distensibility pressure-curve determined in L-NAME rats was a direct continuation of that obtained in control rats. In contrast the distensibility in SHR was increased (P < .01, SHR versus L-NAME rats). Carotid artery cross-sectional area and left ventricular weight index were increased similarly in SHR and L-NAME rats compared with control rats. Thus the hypertension caused by long-term nitric oxide synthesis inhibition was not associated with the increased arterial distensibility observed in SHR despite similar blood pressure elevations, similar arterial hypertrophy, and consequently similar wall stress. This suggests a role for nitric oxide in regulating the mechanical behavior of arteries exposed to high blood pressure.
Keywords
Amino Acid Oxidoreductases, Animals, Arginine, Blood Pressure, Carotid Arteries, Elasticity, Male, NG-Nitroarginine Methyl Ester, Nitric Oxide Synthase, Rats, Rats, Inbred SHR, Rats, Inbred WKY, Time Factors
Pubmed
Web of science
Create date
17/01/2008 16:38
Last modification date
20/08/2019 14:00
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