A new NO donor failed to release NO and to induce relaxation in the rat basilar artery
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
05/11/2013
05/11/2013
2012
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Resumo |
Nitric oxide (NO)-donors are pharmacologically active substances that in vivo or in vitro release NO. Their most common side effect is headache caused by cerebral vasodilatation. We previously demonstrated that the new NO-donor Ru(terpy)(bdq)NO](3+) (Terpy), synthesized in our laboratory, induces relaxation of rat aorta. This study aimed to verify the effect of Terpy and sodium nitroprusside (SNP) in basilar artery. We conducted vascular reactivity experiments on endothelium-denuded basilar rings. The concentrations of iron (Fe) and ruthenium (Ru) complex were analyzed in basilar artery lysates after incubation with NO donors by mass spectrometry. We also evaluated the NO released from SNP and Terpy by using confocal microscopy. Interestingly, Terpy did not induce relaxation of the basilar artery. SNP induced relaxation in a concentration-dependent way. NO donors cross the membrane of vascular smooth muscle and entered the cell. In spite of its permeability, Terpy did not release NO in the basilar artery. Otherwise, SNP released NO in the basilar artery cells cytoplasm. Taken together, our results demonstrate that the new NO donor (Terpy) failed to release NO and to induce relaxation in the basilar artery. The NO donor SNP induces vascular relaxation due to NO release in the vascular smooth muscle cells. (C) 2011 Elsevier B.V. All rights reserved. Fundacao de Amparo a Pesquisa do Estado de Sao Paulo Fundacao de Amparo a Pesquisa do Estado de Sao Paulo Conselho Nacional de Desenvolvimento Cientifico e Tecnologico Conselho Nacional de Desenvolvimento Cientifico e Tecnologico |
Identificador |
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES, AMSTERDAM, v. 45, n. 3, supl. 1, Part 6, pp. 344-350, FEB 14, 2012 0928-0987 http://www.producao.usp.br/handle/BDPI/41245 10.1016/j.ejps.2011.12.002 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE BV AMSTERDAM |
Relação |
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES |
Direitos |
closedAccess Copyright ELSEVIER SCIENCE BV |
Palavras-Chave | #NITRIC OXIDE DONOR #BASILAR ARTERY #VASODILATATION #NITROSYL RUTHENIUM COMPLEX #NITRIC-OXIDE #SODIUM-NITROPRUSSIDE #CEREBRAL-CIRCULATION #GLYCERYL TRINITRATE #NITRATE TOLERANCE #ORGANIC NITRATES #SMOOTH-MUSCLE #NITROGLYCERIN #AORTA #PHARMACOLOGY & PHARMACY |
Tipo |
article original article publishedVersion |