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Stroke affects a large number of people, especially in developed countries, but treatment options are limited. Over the years, it has become clear that nitric oxide (NO) plays a major role in this pathology and that treatments that either reduce or increase NO presence may provide an alternative route for reducing the sequelae of brain ischemia. The NO donor LA 419 previously has been shown to protect the brain tissue from ischemic damage in an experimental model of global brain ischemia. Here we study whether this holds true for focal ischemia, a condition closer to the more common form of human stroke. Ischemia was induced in rats by a stereotaxic injection of endothelin-1, a potent vasoconstrictor, in the striatum. Seven days after the injection, magnetic resonance imaging (MRI) found a significant elevation in apparent diffusion coefficient (ADC) in the injected striatum of untreated rats, due to ischemia-induced vascular edema. Animals that received LA 419 prior to injection with endothelin-1 showed an ADC undistinguishable from the contralateral striatum or from the striatum of rats not treated with LA 419. In addition, immunohistochemistry with antibodies against neuronal nitric oxide synthase (nNOS), inducible NOS (iNOS), and nitrotyrosine showed a marked increase in the expression of these markers of NO production following ischemic treatment that was dampened by treatment with LA 419. In summary, our results clearly show that the NO donor LA 419 may be a useful compound for the prevention and/or treatment of focal brain ischemia. © 2007 Elsevier Ireland Ltd. All rights reserved.

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Autor(es)

Martínez -  Murillo, Ricardo -  Fernández, A.P. -  Serrano, J. -  Rodrigo, J. Salas, E. -  Mourelle, M. -  Martínez, A. - 

Id.: 70131870

Idioma: eng  - 

Versión: 1.0

Estado: Final

Palabras claveNitric oxide donor Focal ischemia nNOS iNOS Nitrotyrosine MRI - 

Tipo de recurso: Artículo  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: closedAccess

Requerimientos técnicos:  Browser: Any - 

Relación: [References] Sí

Fecha de contribución: 18-oct-2017

Contacto:

Localización:
* doi: 10.1016/j.neulet.2007.01.011
* issn: 0304-3940
* Neuroscience Letters 415: 149- 153 (2007)

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