Neuropeptide Y-immunoreactive synapses in the intermediolateral cell column of rat and rabbit thoracic spinal cord

I. J. Llewellyn-Smith, J. B. Minson, D. A. Morilak, J. R. Oliver, J. P. Chalmers

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    31 Citations (Scopus)

    Abstract

    Neuropeptide Y (NPY)-immunoreactive nerve fibers in the intermediolateral cell column of rat spinal cord segments T2-T3 and T8-T10 and rabbit segments T3-T6 were studied with light and electron microscopic immunocytochemistry. Plexuses of NPY-immunoreactive nerve fibers were found by light microscopy. NPY-positive synapses were present electron microscopically but non-immunoreactive synapses greatly outnumbered NPY-immunoreactive ones. In the lateral horn of rat T9, 30% of the vesicle-containing NPY-positive axon profiles formed synapses, 95% of which were axodendritic. These synaptic connections may mediate the effects of brainstem NPY neurons on the activity of sympathetic preganglionic neurons.

    Original languageEnglish
    Pages (from-to)243-248
    Number of pages6
    JournalNeuroscience letters
    Volume108
    Issue number3
    DOIs
    Publication statusPublished - 22 Jan 1990

    Keywords

    • Blood pressure
    • Immunocytochemistry
    • Intermediolateral cell column
    • Neuropeptide Y
    • Spinal cord
    • Ultrastructure

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