Paradoxical Reduction of Fatty Streak Formation in Mice Lacking Endothelial Nitric Oxide Synthase

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Paradoxical reduction of fatty streak formation in mice lacking endothelial nitric oxide synthase.

BACKGROUND The endothelial isoform of nitric oxide synthase (eNOS) has been considered to exert an antiatherosclerotic role through synthesis of NO. However, eNOS has been shown to generate superoxide, which could oxidize LDL and promote atherosclerosis. We sought to determine the role of eNOS in diet-induced fatty streak formation through the use of eNOS-deficient mice. METHODS AND RESULTS M...

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Elevated blood pressures in mice lacking endothelial nitric oxide synthase.

Nitric oxide produced in endothelial cells affects vascular tone. To investigate the role of endothelial nitric oxide synthase (eNOS) in blood pressure regulation, we have generated mice heterozygous (+/-) or homozygous (-/-) for disruption of the eNOS gene. Immunohistochemical staining with anti-eNOS antibodies showed reduced amounts of eNOS protein in +/- mice and absence of eNOS protein in -...

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Limb reduction defects in endothelial nitric oxide synthase-deficient mice.

Nitric oxide synthases are a family of enzymes capable of converting l-arginine to l-citrulline with the subsequent release of nitric oxide (NO). NO has been shown to have multiple biologic effects depending on the isoform responsible for its production and its tissue of origin. Murine endothelial nitric oxide synthase (eNOS) is encoded by Nos3, located on mouse chromosome 5. NO produced from t...

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Paradoxical facilitation of pentylenetetrazole-induced convulsion susceptibility in mice lacking neuronal nitric oxide synthase.

The major aim of this study was to elucidate the relationship between nitric oxide (NO) and generalized epilepsy. Mice lacking the neuronal nitric oxide synthase (nNOS) gene (nNOS(-/-)) were used in this study to determine the relationship between nNOS alpha and NO in pentylentetrazole (PTZ)-induced convulsions. nNOS(-/-) mice exhibited severe convulsions following injection with a subconvulsiv...

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Paradoxical activation of endothelial nitric oxide synthase by NADPH oxidase.

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ژورنال

عنوان ژورنال: Circulation

سال: 2002

ISSN: 0009-7322,1524-4539

DOI: 10.1161/01.cir.0000015853.59427.32