Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/11713
Full metadata record
DC FieldValueLanguage
dc.creatorPereira, Aline C.-
dc.creatorOlivon, Vania C.-
dc.creatorOliveira, Ana M. de-
dc.date.accessioned2016-08-31T20:05:25Z-
dc.date.available2016-08-31T20:05:25Z-
dc.date.issued2010-09-
dc.identifier.citationPEREIRA, A.C.; OLIVON, V.; OLIVEIRA, A. M. de. Impaired calcium influx despite hyper-reactivity in contralateral carotid following balloon injury: eNOS involvement. European Journal of Pharmacology, Amsterdam, v. 642, n. 1/3, p. 121–127, Sept. 2010.pt_BR
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S0014299910005029?np=ypt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/11713-
dc.description.abstractBalloon catheter injury results in hyper-reactivity to phenylephrine in contralateral carotids. Decreased nitric oxide (NO) modulation and/or increased intracellular calcium concentration triggers vascular smooth muscle contraction. Therefore, this study explores the participation of NO signaling pathway and calcium mobilization on hyper-reactivity to phenylephrine in contralateral carotids. Concentration–response curves for calcium (CaCl2) and phenylephrine were obtained in control and contralateral carotids four days after balloon injury, in the presence and absence of the inhibitors (L-NAME, L-NNA, 1400W, 7-NI, Oxyhemoglobin, ODQ or Tiron). Confocal microscopy using Fluo-3AM or DHE was performed to detect the intracellular levels of calcium and reactive oxygen species, respectively. The modulation of NO on phenylephrine-induced contraction was absent in the contralateral carotid. Phenylephrine-induced intracellular calcium mobilization was not altered in contralateral carotids. However, extracellular calcium mobilization by phenylephrine was reduced in the contralateral carotid compared to control arteries, and this result was confirmed by confocal microscopy. L-NAME increased phenylephrine-induced extracellular calcium mobilization in the contralateral carotid to the control levels. Results obtained with L-NNA, 1400W, 7-NI, OxyHb, ODQ or Tiron showed that this response was mediated by products from endothelial NOS (eNOS) different from NO and without soluble guanylate cyclase activation, but it involved superoxide anions. Furthermore, Tiron or L-NNA reduced the levels of reactive oxygen species in contralateral carotids. Data suggest that balloon catheter injury promoted eNOS uncoupling in contralateral carotids, which generates superoxide rather than NO, and reduces phenylephrine-induced extracellular calcium mobilization, despite the hyper-reactivity to phenylephrine in contralateral carotids.pt_BR
dc.languageen_USpt_BR
dc.publisherElsevier Science Publisherspt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceEuropean Journal of Pharmacologypt_BR
dc.subjectBalloon injurypt_BR
dc.subjectContralateral carotidpt_BR
dc.subjectCalcium influxpt_BR
dc.subjecteNOS uncouplingpt_BR
dc.subjectSuperoxidept_BR
dc.titleImpaired calcium influx despite hyper-reactivity in contralateral carotid following balloon injury: eNOS involvementpt_BR
dc.typeArtigopt_BR
Appears in Collections:DME - Artigos publicados em periódicos

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.