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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/6849

    Título
    Differential stimulus coupling to dopamine and norepinephrine stores in rabbit carotid body type I cells
    Autor
    Gómez Niño, María ÁngelesAutoridad UVA Orcid
    Dinger, Bruce
    González Martínez, Constancio
    Fidone, Salvatore
    Año del Documento
    1990
    Editorial
    Elsevier
    Documento Fuente
    Brain Research 525(1990) 160-164
    Résumé
    Recent studies suggest that preneural type I (glomus) cells in the arterial chemoreceptor tissue of the carotid body act as primary transducer elements which respond to natural stimuli (low 02, pH or increased CO2) by releasing chemical transmitter agents capable of exciting the closely apposed afferent nerve terminals. These type I cells contain multiple putative transmitters, but the identity of the natural excitatory agents remains an unresolved problem in carotid body physiology. Characterization of putative transmitter involvement in the response to natural and pharmacological stimuli has therefore become fundamental to further understanding of chemotransmission in this organ. The present study demonstrates that a natural stimulus (hypoxia) evokes the release of dopamine (DA) and norepinephrine (NE) in approximate proportion to their unequal stores in rabbit carotid body (DA release/NE release = 8.2). In contrast, nicotine (100/~M), a cholinornimetic agent thought to act on the nicotinic receptors present on the type I cells, evokes the preferential release of NE (DA release/NE release = 0.17). These findings suggest that distinct mechanisms are involved in a differential mobilization of these two cateeholamines from the rabbit carotid body.
    Materias (normalizadas)
    Neurofisiología
    ISSN
    0006-8993
    Revisión por pares
    SI
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/6849
    Derechos
    openAccess
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    • DEP06 - Artículos de revista [353]
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    Universidad de Valladolid

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