Abstract
Ultrastructural localisation of type I (neuronal) and type III (endothelial) isoforms of nitric oxide synthase in perivascular nerve fibres (axons) and endothelial cells was studied in the Wistar rat cerebral basilar artery, using monoclonal antibodies either to type I or type III nitric oxide synthase and post-embedding colloidal-gold immunocytochemistry. Labelling signal (gold particles) for type I and type III nitric oxide synthase was localised both in axons and endothelial cells. In the axon profiles, labelling for either type I or type III nitric oxide synthase was localised in the axoplasm and the lumen and/or membrane of small agranular synaptic vesicles. In the endothelial cells, labelling for either type-I or type-III nitric oxide synthase was predominantly in the cytoplasm. The present qualitative data extends our previous study of cerebrovascular nerve fibres and endothelial cells employing monoclonal antibodies; the localisation of nitric oxide synthase in a subpopulation of synaptic vesicles in nitric oxide synthase-positive cerebrovascular nerves suggests that vesicular mechanisms may be involved in the production/release of nitric oxide. © 1998 Chapman and Hall
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Loesch, A., Burnstock, G. Perivascular nerve fibres and endothelial cells of the rat basilar artery: immuno-gold labelling of antigenic sites for type I and type III nitric oxide synthase. J Neurocytol 27, 197–204 (1998). https://doi.org/10.1023/A:1026493425977
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DOI: https://doi.org/10.1023/A:1026493425977