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Nitric oxide regulates endothelium-dependent vasodilator responses in rabbit hindquarters vascular bed in vivo

Nitric oxide regulates endothelium-dependent vasodilator responses in rabbit hindquarters... Cohen, Gordon A., Adrian J. Hobbs, Richard M. Fitch, Michael J. Zinner, Gautam Chaudhuri, and Louis J. Ignarro. Nitric oxide regulates endothelium-dependent vasodilator responses in rabbit hindquarters vascular bed . Am. J. Physiol. 271 (Heart Circ. Physiol. 40): Hl33H139, 1996.-The objective of this study was to determine whether nitric oxide (NO) could function as a modulator of endothelium-dependent vasodilation . To this end, the influence of exogenous NO on vasodilator responses in the rabbit hindquarters vascular bed was determined. Previous in vitro studies have demonstrated that NO inhibits both neuronal NO synthase from rat cerebellum as well as NO synthase derived from bovine aortic endothelial cells. The present study was conducted in the rabbit hindquarters vascular bed under conditions of constant blood flow so that changes in pressure directly reflected changes in vascular resistance. Under these conditions, the NO donor agent S-nitroso-N-acetylpenicillamine (SNAP) reversibly attenuated responses to the endotheliumdependent vasodilators, acetylcholine and bradykinin. In contrast, SNAP did not influence the endothelium-independent vasodilator response to SNAP itself or to &bromoguanosine 3’,5’-cyclic monophosphate. These observations indicate clearly that NO interferes with endothelium-dependent vasodilator action and support the view that endogenous NO may actually play a physiological role in regulating vascular http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png AJP - Heart and Circulatory Physiology The American Physiological Society

Nitric oxide regulates endothelium-dependent vasodilator responses in rabbit hindquarters vascular bed in vivo

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Publisher
The American Physiological Society
Copyright
Copyright © 1996 the American Physiological Society
ISSN
0363-6135
eISSN
1522-1539
Publisher site
See Article on Publisher Site

Abstract

Cohen, Gordon A., Adrian J. Hobbs, Richard M. Fitch, Michael J. Zinner, Gautam Chaudhuri, and Louis J. Ignarro. Nitric oxide regulates endothelium-dependent vasodilator responses in rabbit hindquarters vascular bed . Am. J. Physiol. 271 (Heart Circ. Physiol. 40): Hl33H139, 1996.-The objective of this study was to determine whether nitric oxide (NO) could function as a modulator of endothelium-dependent vasodilation . To this end, the influence of exogenous NO on vasodilator responses in the rabbit hindquarters vascular bed was determined. Previous in vitro studies have demonstrated that NO inhibits both neuronal NO synthase from rat cerebellum as well as NO synthase derived from bovine aortic endothelial cells. The present study was conducted in the rabbit hindquarters vascular bed under conditions of constant blood flow so that changes in pressure directly reflected changes in vascular resistance. Under these conditions, the NO donor agent S-nitroso-N-acetylpenicillamine (SNAP) reversibly attenuated responses to the endotheliumdependent vasodilators, acetylcholine and bradykinin. In contrast, SNAP did not influence the endothelium-independent vasodilator response to SNAP itself or to &bromoguanosine 3’,5’-cyclic monophosphate. These observations indicate clearly that NO interferes with endothelium-dependent vasodilator action and support the view that endogenous NO may actually play a physiological role in regulating vascular

Journal

AJP - Heart and Circulatory PhysiologyThe American Physiological Society

Published: Jul 1, 1996

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